MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR Asset-Backed Securities Trust 2006-WMC2 Mortgage Pass-Through Certificates UNDERWRITING AGREEMENT
MORTGAGE
      ASSET SECURITIZATION TRANSACTIONS, INC.
    $745,078,000
    MASTR
      Asset-Backed Securities Trust 2006-WMC2
    Mortgage
      Pass-Through Certificates
                                      June
      1,
      2006
    UBS
      Securities LLC
    ▇▇▇▇
      ▇▇▇▇▇▇ ▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇
    ▇▇▇
      ▇▇▇▇,
      ▇▇▇ ▇▇▇▇ ▇▇▇▇▇
    Ladies
      and Gentlemen:
    Mortgage
      Asset Securitization Transactions, Inc., a Delaware corporation (the
“Company”),
      proposes to sell to UBS Securities LLC (the “Underwriter”),
      pursuant to this agreement (“Agreement”),
      the
      Company’s Mortgage Pass-Through Certificates, Series 2006-WMC2, Class A-1, Class
      ▇-▇, ▇▇▇▇▇ ▇-▇, Class ▇-▇, ▇▇▇▇▇ ▇-▇, Class M-1, Class M-2, Class M-3, Class
      M-4, Class M-5, Class M-6, Class M-7, Class M-8, and Class-M-9 Certificates
      (the
“Offered
      Certificates”
and,
      together with the Class M-10, CE, Class P, Class R and Class R-X Certificates,
      the “Certificates”)
      issued
      pursuant to the Pooling and Servicing Agreement, dated as of June 1, 2006 (the
      “Pooling
      and Servicing Agreement”),
      among
      the Company, as depositor, ▇▇▇▇▇ Fargo Bank, N.A, as servicer, master servicer,
      trust administrator and custodian (the “Servicer”,
      the
“Master
      Servicer”,
      the
“Trust
      Administrator”
and
      “Custodian”)
      and
      U.S. Bank National Association, as trustee (the “Trustee”).
      The
      Certificates will represent in the aggregate the entire beneficial ownership
      interest in a trust (the “Trust”)
      primarily consisting of a segregated pool (the “Mortgage
      Pool”)
      of one
      to four-family residential mortgage loans (the “Mortgage
      Loans”).
      Pursuant to the Assignment and Recognition Agreement, dated as of June 29,
      2006
      (the “Assignment
      Agreement”),
      among
      UBS Real Estate Securities Inc. (“UBSRES”),
      the
      Company and WMC Mortgage Corp. (“WMC”),
      the
      Mortgage Loans will be purchased from UBSRES by the Company in exchange for
      the
      Class CE and Class P Certificates and net proceeds from the sale of the
      remaining Certificates. The Offered Certificates are described more fully in
      Schedule A hereto and the Registration Statement (as hereinafter defined).
      This
      is to confirm the arrangements with respect to the Underwriter’s purchase of the
      Offered Certificates. 
    Reference
      is hereby made to (i) the Indemnification Agreement, dated as of June 1, 2006
      (the “Trustee Indemnification Agreement”), between the Company and the Trustee;
      the Indemnification Agreement, dated as of June 1, 2006 (the “WMC
      Indemnification Agreement”), between the Company and WMC; the Indemnification
      Agreement, dated as of June 1, 2006 (the “Servicer Indemnification Agreement”),
      between the Company and the Servicer; the Indemnification Agreement, dated
      as of
      June 1, 2006 (the “Swap Provider Indemnification Agreement”), between the
      Company and UBS AG (the “Swap Provider”); the Indemnification Agreement, dated
      as of June 1, 2006 (the “Master Servicer Indemnification Agreement” together
      with the Trustee Indemnification Agreement, the WMC Indemnification Agreement,
      the Swap Provider and the Servicer Indemnification Agreement, the
“Indemnification Agreements”), between the Company and the Master Servicer. The
      Pooling and Servicing Agreement, the Assignment Agreement and the
      Indemnification Agreements are collectively referred to herein as the
“Transaction
      Documents.”
The
      Certificates are described more fully in the Prospectus (as hereinafter
      defined). Only the Offered Certificates are being sold pursuant to this
      Agreement.
    The
      Company has filed with the Securities and Exchange Commission (the “Commission”)
      a
      registration statement on Form S-3 (No. 333-130373) for the registration of
      the
      Offered Certificates under the Securities Act of 1933 (the “1933
      Act”),
      which
      registration statement has become effective and copies of which, as amended
      to
      the date hereof, have been delivered to the Underwriter. The Company proposes
      to
      file with the Commission pursuant to Rule 424(b)(5) under the rules and
      regulations of the Commission under the 1933 Act, as amended (the “1933
      Act Regulations”)
      a
      prospectus supplement (the “Prospectus
      Supplement”),
      to
      the prospectus, dated June 1, 2006, included in such registration statement,
      relating to the Offered Certificates and the method of distribution thereof.
      Such registration statement on Form S-3, including exhibits thereto, as amended
      as of the date hereof, is hereinafter called the “Registration
      Statement”;
      and
      such prospectus, supplemented by the Prospectus Supplement or further supplement
      relating to the Offered Certificates, is hereinafter called the “Prospectus.”
The
      free writing prospectus, dated May 30, 2006, to the prospectus, dated April
      18,
      2006 which, is proposed to be used in connection with the sale of the Offered
      Certificates and filed with the Commission pursuant to Rule 433 under the 1933
      Act, is hereinafter referred to as the “Preliminary Prospectus.”
    SECTION
      1.  Representations
      and Warranties.
      (i)
      The
      Company represents and warrants to the Underwriter as follows:
    (a)  The
      Registration Statement, as amended as of the effective date thereof (the
“Effective
      Date”),
      the
      Preliminary Prospectus, as of the date thereof and as of the date of the
      Contract of Sale, and the Prospectus, as of the date thereof, complied in all
      material respects with the requirements of the 1933 Act and the 1933 Act
      Regulations. The Registration Statement, as of the Effective Date, did not
      contain an untrue statement of a material fact or omit to state any material
      fact required to be stated therein or necessary to make the statements therein
      not misleading. The Preliminary Prospectus, as amended or supplemented as of
      its
      date and as of the date of the Contract of Sale and the Prospectus, as of the
      date thereof, did not, and as of the Closing Date will not, contain any untrue
      statement of a material fact or omit to state a material fact necessary in
      order
      to make the statements therein, in light of the circumstances under which they
      were made, not misleading; provided, however, that the representations and
      warranties in this subsection shall not apply to statements in or omissions
      from
      the Registration Statement, Preliminary Prospectus or Prospectus (A) arising
      from or included in the Company Information (as defined in the Indemnification
      Agreement) or (B) made in reliance upon and in conformity with information
      furnished to the Company in writing by the Underwriter expressly for use in
      the
      Registration Statement or Prospectus. The Company and the Underwriter hereby
      acknowledge that only the statements set forth on Exhibit A hereto (the
“Underwriter’s
      Information”)
      constitute statements made in reliance upon and in conformity with information
      furnished to the Company in writing by the Underwriter expressly for use in
      the
      Registration Statement or Prospectus.
    (b)  Since
      the
      respective dates as of which information is given in the Registration Statement,
      Preliminary Prospectus and Prospectus, except as otherwise stated therein,
      (A)
      there has been no material adverse change in the condition, financial or
      otherwise, or in the earnings, business affairs or business prospects of the
      Company, whether or not arising in the ordinary course of business, and (B)
      there have been no transactions entered into by the Company, other than those
      in
      the ordinary course of business, which are material with respect to the
      Company.
    (c)  The
      Company has been duly incorporated and is validly existing as a corporation
      in
      good standing under the laws of the State of Delaware with corporate power
      and
      authority to own, lease and operate its properties and to conduct its business,
      as now conducted by it, and to enter into and perform its obligations under
      the
      Transaction Documents to which it is a party; and the Company is duly qualified
      as a foreign corporation to transact business and is in good standing in each
      jurisdiction in which such qualification is required, whether by reason of
      the
      ownership or leasing of property or the conduct of business.
    (d)  The
      Company is not in violation of its charter or in default in the performance
      or
      observance of any material obligation, agreement, covenant or condition
      contained in any contract, indenture, mortgage, loan agreement, note, lease
      or
      other instrument to which the Company is a party, or to which any of the
      property or assets of the Company may be subject, or by which it or any of
      them
      may be bound; and the issuance and sale of the Offered Certificates to the
      Underwriter, the execution, delivery and performance of the Transaction
      Documents to which it is a party and the consummation of the transactions
      contemplated therein and herein and compliance by the Company with its
      obligations thereunder and hereunder have been duly authorized by all necessary
      corporate action and will not conflict with or constitute a breach of, or
      default under, or result in the creation or imposition of any lien, charge
      or
      encumbrance upon any property or assets of the Company pursuant to any material
      contract, indenture, mortgage, loan agreement, note, lease or other instrument
      to which the Company is a party or by which it or any of them may be bound,
      or
      to which any of the property or assets of the Company is subject, nor will
      such
      action result in any violation of the provisions of the charter or by-laws
      of
      the Company or any applicable law, administrative regulation or administrative
      or court decree.
    (e)  There
      is
      no action, suit or proceeding before or by any court or governmental agency
      or
      body, domestic or foreign, now pending, or, to the knowledge of the Company,
      threatened, against or affecting the Company, which is required to be disclosed
      in the Registration Statement (other than as disclosed therein), or which might
      result in any material adverse change in the condition, financial or otherwise,
      or in the earnings, business affairs or business prospects of the Company,
      or
      which might materially and adversely affect the properties or assets thereof
      or
      which might materially and adversely affect the consummation of the transactions
      contemplated by the Transaction Documents to which it is a party; all pending
      legal or governmental proceedings to which the Company is a party or of which
      its property or assets is the subject which are not described in the
      Registration Statement, including ordinary routine litigation incidental to
      the
      business, are, considered in the aggregate, not material; and there are no
      contracts or documents of the Company which are required to be filed as exhibits
      to the Registration Statement by the 1933 Act or by the 1933 Act Regulations
      which have not been so filed.
    (f)  No
      authorization, approval or consent of any court or governmental authority or
      agency is necessary in connection with the offering, issuance or sale of the
      Offered Certificates hereunder, except such as have been, or as of the Closing
      Date will have been, obtained or such as may otherwise be required under
      applicable state securities laws in connection with the purchase and offer
      and
      sale of the Offered Certificates by the Underwriter and any recordation of
      the
      respective assignments of the Mortgage Loans to the Trustee pursuant to the
      Pooling and Servicing Agreement that have not yet been completed.
    (g)  The
      Company possesses all material licenses, certificates, authorities or permits
      issued by the appropriate state, federal or foreign regulatory agencies or
      bodies necessary to conduct the business now operated by it, and the Company
      has
      not received any notice of proceedings relating to the revocation or
      modification of any such license, certificate, authority or permit which, singly
      or in the aggregate, if the subject of an unfavorable decision, ruling or
      finding, would materially and adversely affect the condition, financial or
      otherwise, or the earnings, business affairs or business prospects of the
      Company.
    (h)  Each
      of
      the Transaction Documents to which it is a party has been duly authorized,
      executed and delivered by the Company and constitutes a legal, valid and binding
      agreement enforceable against the Company in accordance with its terms, except
      as enforceability may be limited by (A) bankruptcy, insolvency, reorganization,
      receivership, moratorium or other similar laws affecting the enforcement of
      the
      rights of creditors generally, (B) general principles of equity, whether
      enforcement is sought in a proceeding in equity or at law, and (C) public policy
      considerations underlying the securities laws, to the extent that such public
      policy considerations limit the enforceability of the provisions of such
      Transaction Documents that purport to provide indemnification from securities
      law liabilities.
    (i)  At
      the
      time of the execution and delivery of the Pooling and Servicing Agreement,
      the
      Company (i) will have good and marketable title to the Mortgage Loans being
      transferred by it to the Trustee pursuant thereto, free and clear of any lien,
      mortgage, pledge, charge, encumbrance, adverse claim or other security interest
      (collectively “Liens”),
      (ii)
      will not have assigned to any person any of its right, title or interest in
      such
      Mortgage Loans or in the Assignment Agreement or the Offered Certificates being
      issued pursuant to the Pooling and Servicing Agreement, and (iii) will have
      the
      power and authority to transfer such Mortgage Loans to the Trustee and sell
      the
      Offered Certificates to the Underwriter, and upon execution and delivery of
      the
      Pooling and Servicing Agreement, the Trustee will have acquired ownership of
      all
      of the Company’s right, title and interest in and to the related Mortgage Loans,
      and upon delivery to the Underwriter of the Offered Certificates, the
      Underwriter will have good and marketable title to the Offered Certificates,
      in
      each case free of Liens.
    (j)  The
      Offered Certificates and the Pooling and Servicing Agreement will each conform
      in all material respects to the descriptions thereof contained in the
      Preliminary Prospectus and Prospectus, and the Offered Certificates, when duly
      and validly authorized, executed, authenticated and delivered in accordance
      with
      the Pooling and Servicing Agreement and paid for by the Underwriter as provided
      herein, will be entitled to the benefits of the Pooling and Servicing
      Agreement.
    (k)  The
      Trust
      created by the Pooling and Servicing Agreement will not be required to be
      registered as an investment company under the Investment Company Act of 1940,
      as
      amended (the “1940
      Act”),
      and
      the Pooling and Servicing Agreement is not required to be qualified under the
      Trust Indenture Act of 1939, as amended (the “Trust
      Indenture Act”).
    (l)  At
      the
      Closing Date, the Class A-1, Class A-2, Class A-3, Class A-4 and Class A-5
      Certificates will be rated not lower than “Aaa” by ▇▇▇▇▇’▇ Investors Service,
      Inc. (“Moody’s”)
      and
“AAA” by Standard & Poor’s, a division of The McGraw Hill Companies, Inc.
      (“S&P”).
      The
      Class M-1 Certificates will be rated not lower than “AA+” by S&P and “Aa1”
by Moody’s, the Class M-2 Certificates will be rated not lower than “AA+” by
      S&P and “Aa2” Moody’s, the Class M-3 Certificates will be rated not lower
      than “AA” by S&P and “Aa3” by Moody’s, the Class M-4 Certificates will be
      rated not lower than “AA” by S&P and “A1” by Moody’s, the Class M-5
      Certificates will be rated not lower than “AA-” by S&P and “A2” by Moody’s,
      the Class M-6 Certificates will be rated not lower than “A+” by S&P and “A3”
by Moody’s, the Class M-7 Certificates will be rated not lower than “A” by
      S&P and “Baa1” by Moody’s, the Class M-8 Certificates will be rated not
      lower than “BBB+” by S&P and “Baa2” by Moody’s and the Class M-9
      Certificates will be rated not lower than “BBB” by S&P and “Baa3” by
      Moody’s.
    (m)  Any
      taxes, fees and other governmental charges in connection with the execution,
      delivery and issuance of the Transaction Documents to which it is a party and
      the Offered Certificates have been paid or will be paid at or prior to the
      Closing Date.
    (n)  The
      sale
      of the Mortgage Loans to the Trustee on the Closing Date and the sale by the
      Company of the Offered Certificates will be treated by the Company for financial
      accounting and reporting purposes as a sale of assets and not as a pledge of
      assets to secure debt
    (o)  As
      of the
      Effective Date and as of the date of the Contract of Sale, the Depositor is
      not
      and will not be as of the Closing Date an “ineligible issuer” as defined in Rule
      405 of the Securities Act.
    (p)  Any
      certificate signed by any officer of the Company and delivered to the
      Underwriter or its counsel shall be deemed a representation and warranty by
      the
      Company to the Underwriter as to the matters covered thereby.
    (q)  As
      of the
      Contract of Sale, the Preliminary Prospectus did not include any untrue
      statement of a material fact or omission of any material fact necessary in
      order
      to make the statements therein, in light of the circumstances under which they
      were made, not misleading.
    (r)  No
      Advisory or Fiduciary Responsibility.
    The
      Company acknowledges and agrees that: (i) the purchase and sale of the Offered
      Certificates pursuant to this Agreement, including the determination of the
      offering price of the Offered Certificates and any related discounts and
      commissions, is an arm’s-length commercial transaction between the Company and
      the Underwriter and the Company is capable of evaluating and understanding
      and
      understands and accepts the terms, risks and conditions of the transactions
      contemplated by this Agreement; (ii) in connection with each transaction
      contemplated hereby and the process leading to such transaction each Underwriter
      is and has been acting solely as a principal and is not the agent or fiduciary
      of the Company, or its respective affiliates, stockholders, creditors or
      employees or any other party; (iii) the Underwriter has not assumed or will
      assume an advisory or fiduciary responsibility in favor of the Company with
      respect to any of the transactions contemplated hereby or the process leading
      thereto (irrespective of whether such Underwriter has advised or is currently
      advising the Company on other matters) or any other obligation to the Company
      except the obligations expressly set forth in this Agreement; (iv) the
      Underwriter and its affiliates may be engaged in a broad range of transactions
      that involve interests that differ from those of the Company and that the
      Underwriter has no obligation to disclose any of such interests by virtue of
      any
      fiduciary or advisory relationship; and (v) the Underwriter has not provided
      any
      legal, accounting, regulatory or tax advice with respect to the offering
      contemplated hereby and the Company has consulted its own legal, accounting,
      regulatory and tax advisors to the extent it deemed appropriate.
    This
      Agreement supersedes all prior agreements and understandings (whether written
      or
      oral) between the Company and the Underwriter, or any of them, with respect
      to
      the subject matter hereof. The Company hereby waives and releases, to the
      fullest extent permitted by law, any claims that the Company may have against
      the Underwriter with respect to any breach or alleged breach of fiduciary
      duty.
    SECTION
      2.  Purchase
      and Sale.
      Subject
      to the terms and conditions herein set forth and in reliance upon the
      representations and warranties herein contained, the Company agrees to sell
      to
      the Underwriter, and the Underwriter agrees to purchase from the Company, at
      a
      purchase price set forth on Schedule A hereto, the principal amount of the
      Offered Certificates set forth on Schedule A hereto.
    SECTION
      3.  Delivery
      and Payment.
      Payment
      of the purchase price for, and delivery of, the Offered Certificates to be
      purchased by the Underwriter shall be made at the office of ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇
      & Wood llp,
      Two
      World ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇, or at such other place as
      shall be agreed upon by the Underwriter and the Company, at 10:00 A.M. New
      York
      City time, on June 29, 2006, which date and time may be postponed by agreement
      between you and the Company (such time and date of payment and delivery being
      herein called the “Closing
      Date”).
      Payment shall be made to the Company, at its option, by (i) appropriate notation
      of an inter company transfer between affiliates of UBS Securities LLC or (ii)
      in
      immediately available Federal funds wired to such bank as may be designated
      by
      the Company, against delivery of the Offered Certificates. The Offered
      Certificates shall be in such denominations and registered in such names as
      the
      Underwriter may request in writing at least two business days before Closing
      Date. The Offered Certificates will be made available for examination and
      packaging by the Underwriter not later than 10:00 A.M. on the last business
      day
      prior to Closing Date.
    SECTION
      4.  Covenants
      of the Company.
      
    (i)  The
      Company covenants with the Underwriter as follows:
    (a)  The
      Company will give the Underwriter notice of its intention to file or prepare
      any
      amendment to the Registration Statement, any amendment or supplement to the
      Preliminary Prospectus, Prospectus Supplement, or any amendment or supplement
      to
      the Prospectus (including any revised prospectus which the Company proposes
      for
      use by the Underwriter in connection with the offering of the Offered
      Certificates which differs from the prospectus on file at the Commission at
      the
      time the Registration Statement becomes effective, whether or not such revised
      prospectus is required to be filed pursuant to Rule 433 or Rule 424(b) of the
      1933 Act Regulations), will furnish the Underwriter with copies of any such
      amendment or supplement a reasonable amount of time prior to such proposed
      filing or use, as the case may be, and will not file any such amendment or
      supplement or use any such prospectus to which the Underwriter shall reasonably
      object.
    (b)  The
      Company will cause the Preliminary Prospectus to be transmitted to the
      Commission for filing pursuant to Rule 433 under the 1933 Act by means
      reasonably calculated to result in filing with the Commission pursuant to said
      rule. The Company will cause the Prospectus Supplement and Prospectus to be
      transmitted to the Commission for filing pursuant to Rule 424(b)(5) under the
      1933 Act by means reasonably calculated to result in filing with the Commission
      pursuant to said rule.
    (c)  The
      Company will deliver to the Underwriter as many signed copies of the
      Registration Statement as originally filed and of each amendment thereto
      (including exhibits filed therewith or incorporated by reference therein) as
      the
      Underwriter may reasonably request and will also deliver to the Underwriter
      a
      conformed copy of the Registration Statement as originally filed and of each
      amendment thereto (without exhibits).
    (d)  The
      Company will furnish to the Underwriter, from time to time during the period
      when the Preliminary Prospectus or Prospectus is required to be delivered under
      the 1933 Act or the Securities Exchange Act of 1934, as amended (the
“1934
      Act”),
      such
      number of copies of the Preliminary Prospectus or Prospectus (as amended or
      supplemented) as the Underwriter may reasonably request for the purposes
      contemplated by the 1933 Act or the 1934 Act or the respective applicable rules
      and regulations of the Commission thereunder.
    (e)  If
      during
      the period after the first date of the public offering of the Offered
      Certificates in which a prospectus relating to the Offered Certificates is
      required to be delivered under the 1933 Act, any event shall occur as a result
      of which it is necessary, in the opinion of counsel for the Underwriter, to
      amend or supplement the Prospectus in order to make the Prospectus not
      misleading in the light of the circumstances existing at the time it is
      delivered to a purchaser, the Company will forthwith amend or supplement the
      Prospectus (in form and substance satisfactory to counsel for the Underwriter)
      so that, as so amended or supplemented, the Prospectus will not include an
      untrue statement of a material fact or omit to state a material fact necessary
      in order to make the statements therein, in the light of the circumstances
      existing at the time it is delivered to a purchaser, not misleading, and the
      Company will furnish to the Underwriter a reasonable number of copies of such
      amendment or supplement.
    (f)  The
      Company will endeavor to arrange for the qualification of the Offered
      Certificates for sale under the applicable securities laws of such states and
      other jurisdictions of the United States as the Underwriter may designate;
      provided, however, that the Company shall not be obligated to qualify as a
      foreign corporation in any jurisdiction in which it is not so qualified. In
      each
      jurisdiction in which the Offered Certificates have been so qualified, the
      Company will file such statements and reports as may be required by the laws
      of
      such jurisdiction to continue such qualification in effect for a period of
      not
      less than one year from the effective date of the Registration
      Statement.
    (g)  The
      Company will use the net proceeds received by it from the sale of the Offered
      Certificates in the manner specified in the Prospectus under “Use
      of Proceeds.”
    (h)  If
      the
      transactions contemplated by this Agreement are consummated, the Company will
      pay or cause to be paid all expenses incident to the performance of the
      obligations of the Company under this Agreement, and will reimburse the
      Underwriter for any reasonable expenses (including reasonable fees and
      disbursements of counsel) reasonably incurred by them in connection with
      qualification of the Offered Certificates for sale and determination of their
      eligibility for investment under the laws of such jurisdictions as the
      Underwriter has reasonably requested and the printing of memoranda relating
      thereto, for any fees charged by investment rating agencies for the rating
      of
      the Offered Certificates, and for expenses incurred in distributing the
      Preliminary Prospectus or Prospectus (including any amendments and supplements
      thereto) to the Underwriter. Except as herein provided, the Underwriter shall
      be
      responsible for paying all costs and expenses incurred by them, including the
      fees and disbursements of counsel, in connection with the purchase and sale
      of
      the Offered Certificates.
    (i)  If,
      during the period after the Closing Date in which a prospectus relating to
      the
      Offered Certificates is required to be delivered under the 1933 Act, the Company
      receives notice that a stop order suspending the effectiveness of the
      Registration Statement or preventing the offer and sale of the Offered
      Certificates is in effect, the Company will immediately advise the Underwriter
      of the issuance of such stop order. The Company will make every reasonable
      effort to prevent the issuance of any stop order and, if any stop order is
      issued, to obtain the lifting thereof at the earliest possible
      moment.
    (j)  In
      connection with any transaction contemplated by this Agreement, the Company
      and
      each of its affiliates maintain customary, arm’s-length business relationships
      with the Underwriter and each of its affiliates, and no fiduciary duty on the
      part of the Underwriter or any of its affiliates is thereby or hereby intended
      or created, and the express disclaimer of any such fiduciary relationship on
      the
      part of the Underwriter and each of its affiliates is hereby acknowledged and
      accepted by the Company and each of its affiliates.
    (k)  The
      Company will file or cause to be filed with the Commission such Free Writing
      Prospectus that is either an Issuer Free Writing Prospectus (as defined in
      Section 5(c) hereof) or contains Issuer Information as soon as reasonably
      practicable after the date of this Agreement, but in any event, not later than
      required pursuant to Rules 426 or 433, respectively, of the Securities
      Act.
    (l)  The
      Company shall not be required to file (A) any Free Writing Prospectus, if the
      information included therein is included or incorporated by reference in a
      prospectus or Free Writing Prospectus previously filed with the Commission
      that
      relates to the offering of the Certificates, or (B) any Free Writing Prospectus
      or portion thereof that contains a description of the Certificates or the
      offering of the Certificates which does not reflect the final terms thereof
      (so
      long as such information does not contain any Issuer Information).
    (ii)  The
      Underwriter agrees with the Company that:
    (a)  The
      Underwriter hereby represents and agrees to the terms set forth in Exhibit
      B
      hereto which are incorporated herein by reference. 
    (b)  Prior
      to entering into any Contract of Sale, the Underwriter shall convey the
      Preliminary Prospectus to each prospective investor. The Underwriter shall
      keep
      sufficient records to document its conveyance of the Preliminary Prospectus
      to
      each potential investor prior to the related Contract of Sale. 
    (c)  Unless
      preceded or accompanied by a prospectus satisfying the requirements of Section
      10(a) of the Securities Act, the Underwriter shall not convey or deliver any
      written communication to any person in connection with the initial offering
      of
      the Certificates, unless such written communication (1) is made in reliance
      on
      Rule 134 under the Securities Act, (2) constitutes a prospectus satisfying
      the
      requirements of Rule 430B under the Securities Act or (3) is a Free Writing
      Prospectus.
    (d)  The
      Underwriter may convey a Preliminary Term Sheet or Free Writing Prospectus
      to a
      potential investor prior to entering into a Contract of Sale with such investor;
      provided, however, that (x) such Underwriter shall not enter into a Contract
      of
      Sale with such investor unless the Underwriter has complied with paragraph
      (i)
      above prior to such Contract of Sale, (y) such Underwriter shall deliver a
      copy
      of the proposed Preliminary Term Sheet or Free Writing Prospectus to the
      Depositor and its counsel prior to the anticipated first use and shall not
      convey any such Preliminary Term Sheet or Free Writing Prospectus to which
      the
      Depositor or its counsel reasonably objects.
    (e)  The
      Underwriter may convey Computational Materials (x) to a potential investor
      prior
      to entering into a Contract of Sale with such investor; provided, however,
      that
      (A) such Underwriter shall not enter into a Contract of Sale with such investor
      unless the Underwriter has complied with paragraph (i) above prior to such
      Contract of Sale and (B) such Computational Materials shall not be disseminated
      in a manner reasonably designed to lead to its broad unrestricted dissemination;
      provided, however, that if such Computational Materials are disseminated in
      a
      manner reasonably designed to lead to its broad unrestricted dissemination,
      such
      Underwriter shall file with the Commission such Computational Materials, and
      (y)
      to an investor after a Contract of Sale, provided that the Underwriter has
      complied with paragraph (i) above in connection with such Contract of Sale.
      The
      Underwriter shall keep sufficient records of any conveyance of Computational
      Materials to potential or actual investors and shall maintain such records
      as
      required by the Rules and Regulations.
    (f)  If
      the
      Underwriter does not furnish a Free Writing Prospectus to the Depositor’s
      counsel prior to the scheduled print date of the Prospectus Supplement, such
      Underwriter will be deemed to have represented that it did not convey any Free
      Writing Prospectus to any potential investor.
    (g)  Each
      Free
      Writing Prospectus shall contain legends substantially similar to the
      following:
    The
      issuer has filed a registration statement (including a prospectus) with the
      SEC
      for the offering to which this free writing prospectus relates. Before you
      invest, you should read the prospectus in that registration statement and other
      documents the issuer has filed with the SEC for more complete information about
      the issuer and this offering. You may get these documents for free by visiting
      ▇▇▇▇▇ on the SEC Web site at ▇▇▇.▇▇▇.▇▇▇. Alternatively, the issuer, any
      underwriter or any dealer participating in the offering will arrange to send
      you
      the prospectus if you request it by calling toll-free
      ▇-▇▇▇-▇▇▇-▇▇▇▇.
    This
      free
      writing prospectus does not contain all information that is required to be
      included in the base prospectus and the prospectus supplement.
    The
      information in this free writing prospectus supersedes information contained
      in
      any prior similar free writing prospectus relating to these securities prior
      to
      the time of your commitment to purchase.
    The
      asset-backed securities referred to in this free writing prospectus are being
      offered when, as and if issued. In particular, you are advised that asset-backed
      securities, and the asset pools backing them, are subject to modification or
      revision (including, among other things, the possibility that one or more
      classes of securities may be split, combined or eliminated), at any time prior
      to issuance or availability of a final prospectus. As a result, you may commit
      to purchase securities that have characteristics that may change, and you are
      advised that all or a portion of the securities may not be issued that have
      the
      characteristics described in this free writing prospectus. Our obligation to
      sell securities to you is conditioned on the securities having the
      characteristics described in this free writing prospectus. If that condition
      is
      not satisfied, we will notify you, and neither the issuer nor the underwriter
      will have any obligation to you to deliver all or any portion of the securities
      which you have committed to purchase, and there will be no liability between
      us
      as a consequence of the non-delivery.
    This
      free
      writing prospectus is being delivered to you solely to provide you with
      information about the offering of the asset-backed securities referred to in
      this free writing prospectus and to solicit an indication of your interest
      in
      purchasing such securities, when, as and if issued. Any such indication of
      interest will not constitute a contractual commitment by you to purchase any
      of
      the securities.
    (h)  Any
      Computational Materials shall include legends, in addition to those specified
      in
      paragraph (g) above, substantially similar to the following:
    The
      information in this free writing prospectus may be based on preliminary
      assumptions about the pool assets and the structure. Any such assumptions are
      subject to change.
    The
      information in this free writing prospectus may reflect parameters, metrics
      or
      scenarios specifically requested by you. If so, prior to the time of your
      commitment to purchase, you should request updated information based on any
      parameters, metrics or scenarios specifically required by you.
    Neither
      the issuer of the securities nor any of its affiliates prepared, provided,
      approved or verified any statistical or numerical information presented in
      this
      free writing prospectus, although that information may be based in part on
      loan
      level data provided by the issuer or its affiliates.
    (i)  On
      or
      before the Closing Date, the Representative shall execute and deliver to ▇▇▇▇▇▇▇
      ▇▇▇▇▇▇▇▇ & Wood LLP a copy of an original issue discount pricing letter,
      provided to the Representative by ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ & ▇▇▇▇ LLP.
    (j)  The
      Underwriter agrees to retain all Free Writing Prospectuses that it has used
      and
      that are not required to be filed pursuant to this Section 5 for a period of
      three years following the initial bona fide offering of the Offered
      Certificates.
    (iii)  The
      following terms shall have the meanings set forth below, unless the context
      clearly indicates otherwise:
    Computational
      Materials: Any Free Writing Prospectus prepared by the Underwriter that contains
      only (i) information specified in paragraph (5) of the definition of ABS
      Informational and Computational Materials in Item 1101(a) of Regulation AB
      or
      (ii) information that is not Issuer Information.
    Contract
      of Sale: The meaning set forth in Rule 159 under the Securities
      Act.
    Derived
      Information: Such information, if any, in any Free Writing Prospectus prepared
      by any Underwriter that is not contained in either (i) the Registration
      Statement, any Preliminary Prospectus, any Prospectus Supplement or the
      Prospectus or amendments or supplements thereto, taking into account information
      incorporated therein by reference (other than information incorporated by
      reference from any) or (ii) any Pool Information.
    Free
      Writing Prospectus: A “written communication” within the meaning of Rule 405
      under the Securities Act that describes the Certificates and/or the Mortgage
      Loans.
    Issuer
      Information: Such information as defined in Rule 433(h) under the Securities
      Act
      and which shall not include information that is merely based on or derived
      from
      such information.
    Issuer
      Free Writing Prospectus: The meaning set forth in Rule 405 of the Securities
      Act
      except that (i) Computational Materials shall not be an Issuer Free Writing
      Prospectus; (ii) any Free Writing Prospectus or portion thereof prepared by
      or
      on behalf of the underwriter that includes any Issuer Information that is not
      approved by the Depositor for use therein shall not be an Issuer Free Writing
      Prospectus and (iii) no Free Writing Prospectus shall be deemed to be prepared
      by the Underwriter on behalf of the Issuer if such Free Writing Prospectus
      is
      not delivered to the Depositor prior to first use in accordance with Section
      4(ii)(d) hereof.
    Pool
      Information: Information relating to the trust assets furnished by the Company
      to any Underwriter upon which the mathematical calculations reflected in the
      Computational Materials of such Underwriter are based.
    Preliminary
      Term Sheet: A Free Writing Prospectus that contains information described in
      paragraphs (1) - (3) of the definition of ABS Informational and Computational
      Materials in Item 1101(a) of Regulation AB but which does not include Derived
      Information.
    Static
      Pool Data: The information set forth in the Prospectus Supplement pursuant
      to
      Item 1105 of Regulation AB under the Act, whether or not such information is
      incorporated in the Prospectus Supplement or the Registration
      Statement.
    (iv)  
      (a) In
      the event that any Underwriter or the Depositor becomes aware that, as of the
      time of the Contract of Sale, any Free Writing Prospectus prepared by or on
      behalf of the Underwriter or Preliminary Prospectus and delivered to a purchaser
      of an Offered Certificate contained any untrue statement of a material fact
      or
      omitted to state a material fact necessary in order to make the statements
      contained therein, in the light of the circumstances under which they were
      made,
      not misleading (such Free Writing Prospectus or Preliminary Prospectus, a
“Defective Prospectus”), the Underwriter or the Depositor shall notify the other
      parties to this Agreement thereof within one business day after discovery.
      
    (b)
      The
      party responsible for the information to be corrected, if requested by the
      Depositor or the Underwriter, as appropriate, shall prepare a Free Writing
      Prospectus or Preliminary Prospectus, as applicable, with Corrective Information
      that corrects the material misstatement in or omission from the Defective
      Prospectus (such corrected Free Writing Prospectus or Preliminary Prospectus,
      a
“Corrected Prospectus”).
    (c)
      The
      Underwriter shall deliver the Corrected Prospectus to each purchaser of an
      Offered Certificate which received the Defective Prospectus prior to entering
      into an agreement to purchase any Offered Certificates.
    (d)
      The
      Underwriter shall notify such purchaser in a prominent fashion that the prior
      agreement to purchase Offered Certificates has been terminated, and of such
      purchaser’s rights as a result of termination of such agreement.
    (e)
      The
      Underwriter shall provide such purchaser with an opportunity to affirmatively
      agree to purchase such Offered Certificates on the terms described in the
      Corrected Prospectus.
    The
      Underwriter covenants with the Depositor that after the final Prospectus is
      available the Underwriter shall not distribute any written information
      concerning the Offered Certificates to a prospective purchaser of Offered
      Certificates unless such information is preceded or accompanied by the final
      Prospectus.
    SECTION
      5.  Conditions
      of Underwriter’s Obligations.
      The
      Underwriter’s obligation to purchase the Offered Certificates shall be subject
      to the following conditions:
    (a)  No
      stop
      order suspending the effectiveness of the Registration Statement shall be in
      effect, and no proceedings for that purpose shall be pending or, to the
      Company’s knowledge, threatened by the Commission.
    (b)  By
      the
      Closing Date, the Underwriter shall have received the favorable opinion, dated
      as of the Closing Date, of ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ & Wood llp,
      counsel
      for the Company, in form and substance satisfactory to the
      Underwriter.
    (c)  On
      the
      Closing Date, there shall not have been, since the date hereof or since the
      respective dates as of which information is given in the Registration Statement
      and the Prospectus, any material adverse change in the condition, financial
      or
      otherwise, or in the earnings, business affairs or business prospects of the
      Company, whether or not arising in the ordinary course of business, and the
      Underwriter shall have received a certificate of the President or a Vice
      President of the Company, dated as of the Closing Date, to the effect that
      (i)
      the representations and warranties in Section 1 hereof are true and correct
      with
      the same force and effect as though expressly made at and as of the Closing
      Date, (ii) the Company has complied with all agreements and satisfied all
      conditions on its part to be performed or satisfied at or prior to the Closing
      Date, and (iii) no stop order suspending the effectiveness of the Registration
      Statement has been issued and no proceedings for that purpose have been
      initiated or threatened by the Commission.
    (d)  On
      the
      Closing Date counsel for the Underwriter shall have been furnished with such
      other documents and opinions as they may reasonably require for the purpose
      of
      enabling them to pass upon the issuance and sale of the Certificates as herein
      contemplated and related proceedings, or in order to evidence the accuracy
      of
      any of the representations or warranties, or the fulfillment of any of the
      conditions, herein contained; and all proceedings taken by the Company in
      connection with the issuance and sale of the Certificates as herein contemplated
      shall be satisfactory in form and substance to the Underwriter and counsel
      for
      the Underwriter.
    If
      any
      condition specified in this Section shall not have been fulfilled when and
      as
      required to be fulfilled, this Agreement may be terminated by the Underwriter
      by
      notice to the Company at any time at or prior to the Closing Date, and such
      termination shall be without liability of any party to any other
      party.
    SECTION
      6.  Indemnification.
      (i)
      The
      Company agrees to indemnify and hold harmless the Underwriter and each person,
      if any, who controls the Underwriter within the meaning of Section 15 of the
      1933 Act as follows:
    (a)  against
      any and all loss, liability, claim, damage and expense whatsoever, as incurred,
      arising out of any untrue statement or alleged untrue statement of a material
      fact contained in the Registration Statement (or any amendment thereto),
      including the information deemed to be part of the Registration Statement
      pursuant to Rule 430A(b) of the 1933 Act Regulations, if applicable, or the
      omission or alleged omission therefrom of a material fact required to be stated
      therein or necessary to make the statements therein not misleading or arising
      out of any untrue statement or alleged untrue statement of a material fact
      contained in the Preliminary Prospectus, the Prospectus, any Issuer Free Writing
      Prospectus (or any amendment or supplement thereto) or the Static Pool Data
      or
      the omission or alleged omission therefrom of a material fact necessary in
      order
      to make the statements therein, in the light of the circumstances under which
      they were made, not misleading;
    (b)  against
      any and all loss, liability, claim, damage and expense whatsoever, as incurred,
      to the extent of the aggregate amount paid in settlement of any litigation,
      or
      any investigation or proceeding by any governmental agency or body, commenced
      or
      threatened, or of any claim whatsoever based upon any such untrue statement
      or
      omission, or any such alleged untrue statement or omission, if such settlement
      is effected with the written consent of the Company; and
    (c)  against
      any and all expense whatsoever, as incurred (including, the fees and
      disbursements of counsel chosen by the Underwriter), reasonably incurred in
      investigating, preparing or defending against any litigation, or any
      investigation or proceeding by any governmental agency or body, commenced or
      threatened, or any claim whatsoever based upon any such untrue statement or
      omission, or any such alleged untrue statement or omission, to the extent that
      any such expense is not paid under (i) or (ii) above;
    provided,
      however, that this indemnity agreement shall not apply to any loss, liability,
      claim, damage or expense to the extent arising out of any untrue statement
      or
      omission or alleged untrue statement or omission (a) arising from or included
      in
      the Radian Information, as defined in the Radian Indemnification Agreement,
      the
      Trustee Information, as defined in the Trustee Indemnification Agreement, the
      Bear ▇▇▇▇▇▇▇ Information, as defined in the Bear ▇▇▇▇▇▇▇ Financial Products,
      Inc. Indemnification Agreement, the Fremont Information, as defined in the
      Fremont Indemnification Agreement, the ▇▇▇▇▇ Fargo Information, as defined
      in
      the ▇▇▇▇▇ Fargo Servicing Indemnification Agreement, the ▇▇▇▇▇ Fargo
      Information, as defined in the ▇▇▇▇▇ Fargo Master Servicing Indemnification
      Agreement, or (b) made in reliance upon and in conformity with the Underwriter
      Information.
    (d)  The
      Underwriter agrees to indemnify and hold harmless the Company, its officers
      who
      signed the applicable Registration Statement or any amendment thereof, its
      directors, and each person who controls the Company within the meaning of either
      the Act or the Exchange Act against any and all losses, claims, damages or
      liabilities (or actions in respect thereof) to which they may become subject,
      insofar as such losses, claims, damages or liabilities (or actions in respect
      thereof) arise out of or are based upon (A) the Underwriter’s failure to comply
      with Section 4(ii)(b) of this Agreement or (B) any untrue statement or alleged
      untrue statement of any material fact contained in (i) the Derived Information
      and (ii) the Registration Statement, the Preliminary Prospectus, the Prospectus,
      or any amendment or supplement thereto, or arise out of, or are based upon,
      the
      omission or the alleged omission to state therein a material fact required
      to be
      stated in clause (b)(B)(i) or (ii) above or necessary to make the statements
      made therein not misleading, but with respect to clause (b)(B)(ii) above, only
      to the extent that such untrue statement or alleged untrue statement or omission
      or alleged omission was made in reliance upon and in conformity with the
      Underwriter Information; provided, however, that any such omission or alleged
      omission relating to the Derived Information shall be determined by reading
      such
      Derived Information in conjunction with the Preliminary Prospectus or the
      Prospectus, as applicable, as an integral document and in light of the
      circumstances under which such statements in such Derived Information and
      Prospectus were made. This indemnity agreement will be in addition to any
      liability which the Underwriter may otherwise have. 
    (e)  Each
      indemnified party shall give notice as promptly as reasonably practicable to
      each indemnifying party of any action commenced against it in respect of which
      indemnity may be sought hereunder, but failure to so notify an indemnifying
      party shall not relieve such indemnifying party from any liability which it
      may
      have otherwise than on account of this indemnity agreement. An indemnifying
      party may participate at its own expense in the defense of any such action.
      In
      no event shall the indemnifying parties be liable for fees and expenses of
      more
      than one counsel (in addition to any local counsel) separate from their own
      counsel for all indemnified parties in connection with any one action or
      separate but similar or related actions in the same jurisdiction arising out
      of
      the same general allegations or circumstances.
    SECTION
      7.  Contribution.
      In
      order to provide for just and equitable contribution in circumstances in which
      the indemnity agreement provided for in Section 6 hereof is for any reason
      held
      to be unenforceable by the indemnified parties although applicable in accordance
      with its terms, the Company and the Underwriter shall contribute to the
      aggregate losses, liabilities, claims, damages and expenses of the nature
      contemplated by such indemnity agreement incurred by the Company and the
      Underwriter, as incurred, in such proportion as is appropriate to reflect not
      only the relative benefits received by the Company on the one hand and the
      Underwriter on the other from the offering of the Offered Certificates but
      also
      the relative fault of the Company on the one hand and the Underwriter on the
      other in connection with the statements or omissions which resulted on such
      losses, claims, damages or liabilities, as well as any other relevant equitable
      considerations. The relative benefits received by the Company on the one hand
      and the Underwriter on the other shall be in such proportion so that the
      Underwriter is responsible for an amount equal to the amount of the loss
      multiplied by a fraction, the numerator of which is the Spread and the
      denominator of which is the aggregate principal balance of the Offered
      Certificates as set forth on the Prospectus Supplement and the Company is
      responsible for the balance. The relative benefits received by the Underwriter
      shall be the Spread. The relative fault of the Company on the one hand and
      of
      the Underwriter on the other shall be determined by reference to, among other
      things, whether the untrue or alleged untrue statement of a material fact
      relates to information supplied by the Company or by the Underwriter, and the
      parties’ relative intent, knowledge, access to information and opportunity to
      correct or prevent such statement or omission; provided, however, that no person
      guilty of fraudulent misrepresentation (within the meaning of Section 11(f)
      of
      the ▇▇▇▇ ▇▇▇) shall be entitled to contribution from any person who was not
      guilty of such fraudulent misrepresentation. For purposes of this Section,
      each
      person, if any, who controls the Underwriter within the meaning of Section
      15 of
      the 1933 Act shall have the same rights to contribution as such Underwriter,
      and
      each director of the Company, each officer of the Company who signed the
      Registration Statement, and each person, if any, who controls the Company within
      the meaning of Section 15 of the 1933 Act shall have the same rights to
      contribution as the Company. “Spread” means the sum of the following with
      respect to each class of Offered Certificates: the product of (a) the aggregate
      principal amount of that class of Offered Certificates and (b) the aggregate
      difference between the price to the public of that class of Offered Certificates
      and the purchase price of such class as set forth on Schedule A.
    SECTION
      8.  Representations,
      Warranties and Agreements to Survive Delivery.
      All
      representations, warranties and agreements contained in this Agreement, or
      contained in certificates of officers of the Company submitted pursuant hereto,
      shall remain operative and in full force and effect, regardless of any
      investigation made by or on behalf of the Underwriter or controlling person,
      or
      by or on behalf of the Company, and shall survive delivery of the Offered
      Certificates to the Underwriter.
    SECTION
      9.  Termination
      of Agreement.
      (i)
      The
      Underwriter may terminate this Agreement, by notice to the Company, at any
      time
      at or prior to the Closing Date (i) if there has been, since the date of this
      Agreement or since the date as of which information is given in the Registration
      Statement, any material adverse change in the condition, financial or otherwise,
      or in the earnings, business affairs or business prospects of the Company and
      its subsidiaries considered as one enterprise, whether or not arising in the
      ordinary course of business, or (ii) if there has occurred any material adverse
      change in the financial markets in the United States or elsewhere or any
      outbreak of hostilities or escalation thereof or other calamity or crisis the
      effect of which is such as to make it, in the judgment of the Underwriter,
      impracticable to market the Offered Certificates or to enforce contracts for
      the
      sale of the Offered Certificates, or (iii) if trading generally on either the
      American Stock Exchange or the New York Stock Exchange has been suspended,
      or
      minimum or maximum prices for trading have been fixed, or maximum ranges for
      prices for securities have been required, by either of said Exchanges or by
      order of the Commission or any other governmental authority, or if a banking
      moratorium has been declared by either Federal or New York
      authorities.
    (ii)  If
      this
      Agreement is terminated pursuant to this Section, such termination shall be
      without liability of any party to any other party.
    SECTION
      10.  Notices.
      All
      notices and other communications hereunder shall be in writing and shall be
      deemed to have been duly given if mailed or transmitted by any standard form
      of
      telecommunication. Notices to the Underwriter shall be directed to UBS
      Securities LLC at ▇▇▇▇ ▇▇▇▇▇▇ ▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇,
      Attention: ▇▇▇▇ ▇▇▇▇▇▇, Esq.; and notices to the Company shall be directed
      to it
      at Mortgage Asset Securitization Transactions, Inc., ▇▇▇▇ ▇▇▇▇▇▇ ▇▇ ▇▇▇
      ▇▇▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇, attention of the Secretary with a copy
      to
      the Treasurer; or, as to either party, such other address as may hereafter
      be
      furnished by such party to the other in writing.
    SECTION
      11.  Parties.
      This
      Agreement shall inure to the benefit of and be binding upon the Underwriter
      and
      the Company and their respective successors. Nothing expressed or mentioned
      in
      this Agreement is intended or shall be construed to give any person, firm or
      corporation, other than the Underwriter and the Company and their respective
      successors and the controlling persons and officers and directors referred
      to in
      Section 6 and their heirs and legal representatives, any legal or equitable
      right, remedy or claim under or in respect of this Agreement or any provision
      herein contained. This Agreement and all conditions and provisions hereof are
      intended to be for the sole and exclusive benefit of the Underwriter and the
      Company and their respective successors, and said controlling persons and
      officers and directors and their heirs and legal representatives, and for the
      benefit of no other person, firm or corporation. No purchaser of Offered
      Certificates from the Underwriter shall be deemed to be a successor by reason
      merely of such purchase.
    SECTION
      12.  Governing
      Law; and Time.
      This
      Agreement shall be governed by and construed in accordance with the laws of
      the
      State of New York applicable to agreements made and to be performed in said
      State. Specified times of day refer to New York City time.
    [SIGNATURE
      PAGE FOLLOWS]
    If
      the
      foregoing is in accordance with your understanding of our agreement, please
      sign
      and return to the Company a counterpart hereof, whereupon this Agreement, along
      with all counterparts, will become a binding agreement between the Underwriter
      and the Company in accordance with its terms.
    | Very
                truly yours, | |
| MORTGAGE
                ASSET SECURITIZATION TRANSACTIONS, INC. | |
| By: ____________________________________________ | |
| Name:  | |
| Title:
                 | |
| By: ____________________________________________ | |
| Name:
                 | |
| Title:
                 | |
| CONFIRMED
                AND ACCEPTED, | |
| as
                of the date first above written: | |
| UBS
                SECURITIES LLC | |
| By: ________________________________________ | |
| Name:  | |
| Title:
                 | |
| By: ________________________________________ | |
| Name:
                 | |
| Title: | 
SCHEDULE
      A
    | Class
                of Certificates Purchased | Aggregate
                Principal Amount of such Class to be Purchased | Purchase
                Price as a percentage of the Aggregate Principal Amount of such Class
                to
                be Purchased | Price
                to Public as a percentage of the Aggregate Principal Amount of such
                Class
                to be Purchased | |
| UBS
                SECURITIES LLC | ||||
| Class
                A-1 | $ | 269,613,000 | 99.7500% | 100.0000% | 
| Class
                A-2 | $ | 190,000,000 | 99.7500% | 100.0000% | 
| Class
                A-3 | $ | 46,000,000 | 99.7500% | 100.0000% | 
| Class
                A-4 | $ | 83,000,000 | 99.7500% | 100.0000% | 
| Class
                M-1 | $ | 30,819,000 | 99.7500% | 100.0000% | 
| Class
                M-2 | $ | 26,432,000 | 99.7500% | 100.0000% | 
| Class
                M-3 | $ | 23,367,000 | 99.7500% | 100.0000% | 
| Class
                M-4 | $ | 13,791,000 | 99.7500% | 100.0000% | 
| Class
                M-5 | $ | 12,641,000 | 99.7500% | 100.0000% | 
| Class
                M-6 | $ | 12,258,000 | 99.7500% | 100.0000% | 
| Class
                M-7 | $ | 11,109,000 | 99.7500% | 100.0000% | 
| Class
                M-8 | $ | 10,726,000 | 99.7500% | 100.0000% | 
| Class
                M-9 | $ | 9,193,000 | 99.7500% | 100.0000% | 
EXHIBIT
      A
    UNDERWRITER’S
      INFORMATION
    The
      MASTR
      Asset Backed Securities Trust 2006-WMC2 is issuing nineteen classes of
      certificates, but is offering only fourteen classes through this prospectus
      supplement.
    Neither
      the SEC nor any state securities commission has approved the offered
      certificates or determined that this prospectus supplement or the accompanying
      prospectus is accurate or complete. Any representation to the contrary is a
      criminal offense.
    We
      will
      not list the offered certificates on any national securities exchange or on
      any
      automated quotation system of any registered securities association such as
      NASDAQ.
    The
      underwriter, UBS Securities LLC, will purchase the offered certificates from
      Mortgage Asset Securitization Transactions, Inc. UBS Securities LLC expects
      to
      deliver the offered certificates in book entry form through the facilities
      of
      The Depository Trust Company, and upon request, through the facilities of
      Clearstream Banking Luxembourg and the Euroclear System, to purchasers on or
      about June 29, 2006.
    The
      proceeds to the depositor are expected to be approximately
      $743,215,305 before
      deducting expenses.
      See
      “Underwriting” in this prospectus supplement. UBS Securities LLC will sell the
      offered certificates from time to time in negotiated transactions at varying
      prices determined at the time of sale.
    USE
      OF
      PROCEEDS
    The
      depositor will apply the net proceeds of the sale of the offered certificates
      to
      the purchase of the Mortgage Loans transferred to the trust.
    UNDERWRITING
    Subject
      to the terms and conditions set forth in the Underwriting Agreement, dated
      the
      date hereof (the “Underwriting Agreement”), the Depositor has agreed to sell,
      and the underwriter has agreed to purchase, the offered certificates.
    Distribution
      of the offered certificates will be made from time to time in negotiated
      transactions or otherwise at varying prices to be determined at the time of
      sale. Proceeds
      to the depositor from the sale of the offered certificates, before deducting
      expenses payable by the depositor, will be approximately $743,215,305. In
      connection with the purchase and sale of the offered certificates, the
      underwriter may be deemed to have received compensation from the depositor
      in
      the form of underwriting discounts.
    The
      offered certificates are offered subject to receipt and acceptance by the
      underwriter, to prior sale and to the underwriter’s right to reject any order in
      whole or in part and to withdraw, cancel or modify the offer without notice.
      It
      is expected that delivery of the offered certificates will be made through
      the
      facilities of DTC, Clearstream and the Euroclear System on or about the closing
      date. The offered certificates will be offered in Europe and the United States
      of America.
    The
      underwriting agreement provides that the depositor will indemnify the
      underwriter against certain civil liabilities, including liabilities under
      the
      Securities Act of 1933, as amended, or will contribute to payments the
      underwriter may be required to make in respect thereof.
    EXHIBIT
      B
    European
      Economic Area
    In
      relation to each Member State of the European Economic Area which has
      implemented the Prospectus Directive (each, a Relevant
      Member State),
      the
      Underwriter has represented and agreed that with effect from and including
      the
      date on which the Prospectus Directive is implemented in that Relevant Member
      State (the Relevant
      Implementation Date)
      it has
      not made and will not make an offer of certificates to the public in that
      Relevant Member State prior to the publication of a prospectus in relation
      to
      the certificates which has been approved by the competent authority in that
      Relevant Member State or, where appropriate, approved in another Relevant Member
      State and notified to the competent authority in that Relevant Member State,
      all
      in accordance with the Prospectus Directive, except that it may, with effect
      from and including the Relevant Implementation Date, make an offer of
      certificates to the public in that Relevant Member State at any
      time:
    | (a) | to
                legal entities which are authorised or regulated to operate in the
                financial markets or, if not so authorised or regulated, whose corporate
                purpose is solely to invest in securities; | 
| (b) | to
                any legal entity which has two or more of (1) an average of at least
                250
                employees during the last financial year; (2) a total balance sheet
                of
                more than €43,000,000 and (3) an annual net turnover of more than
                €50,000,000, as shown in its last annual or consolidated accounts;
                or | 
| (c) | in
                any other circumstances which do not require the publication by the
                Issuer
                of a prospectus pursuant to Article 3 of the Prospectus
                Directive. | 
For
      the
      purposes of this provision, the expression an “offer of certificates to the
      public” in relation to any certificates in any Relevant Member State means the
      communication in any form and by any means of sufficient information on the
      terms of the offer and the certificates to be offered so as to enable an
      investor to decide to purchase or subscribe the certificates, as the same may
      be
      varied in that Member State by any measure implementing the Prospectus Directive
      in that Member State and the expression Prospectus
      Directive means
      Directive 2003/71/EC and includes any relevant implementing measure in each
      Relevant Member State.
    United
      Kingdom
    The
      Underwriter has represented and agreed that:
    | (a) | it
                has only communicated or caused to be communicated and will only
                communicate or cause to be communicated an invitation or inducement
                to
                engage in investment activity (within the meaning of Section 21 of
                the
                Financial Services and Markets Act) received by it in connection
                with the
                issue or sale of the certificates in circumstances in which Section
                21(1)
                of the Financial Services and Markets Act does not apply to the Issuer;
                and | 
| (b) | it
                has complied and will comply with all applicable provisions of the
                Financial Services and Markets Act with respect to anything done
                by it in
                relation to the certificates in, from or otherwise involving the
                United
                Kingdom. |