SECURITIES AND EXCHANGE COMMISSION
                           WASHINGTON, D.C. 20549

                                  FORM 10-K

                                ANNUAL REPORT
                   PURSUANT TO SECTIONS 13 OR 15(d) OF THE
                       SECURITIES EXCHANGE ACT OF 1934


(Mark One)
[X]      ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2007


                                   OR

[  ]     TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE  ACT OF 1934

For the transition period from __________ to __________

                Commission File Numbers 333-101155, 001-33331


                         SATURNS Trust No. 2007-1
            MS STRUCTURED ASSET CORP., as Depositor and Sponsor
           (Exact name of registrant as specified in its charter)


          Delaware                                        13-4026700
(State or other jurisdiction of                (IRS Employer Identification No.)
incorporation or organization)


      1585 Broadway, Second Floor
         New York, New York                                 10036
      Attention: Madhu Philips
(Address of principal executive office)                  (Zip Code)

Registrant's telephone number, including area code:    (212) 761-2520

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class                    Name of Each Exchange on Which Registered

SATURNS J. C. Penney Company, Inc.                New York Stock Exchange
Debenture Backed Trust 2007-1 Callable
Class A Units


            Securities registered pursuant to Section 12(g) of the Act:

                                   None

<PAGE>


         Indicate by check mark if the registrant is a well-known seasoned
issuer, as defined in Rule 405 of the Securities Act. Yes___  No  X

         Indicate by check mark if the registrant is not required to file
reports  pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.
Yes___  No  X

         Indicate by check mark whether  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required  to file such  reports),  and (2) has been  subject to
such  filing  requirements  for the past 90 days.  Yes  X   No____

         Indicate by check mark if disclosure of delinquent  filers pursuant to
Item 405 of Regulation S-K is not contained herein, and will not be contained,
to the best of registrant's  knowledge,  in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K.  [    ]

         Indicate by check mark whether the registrant is a large accelerated
filer, an accelerated filer, or a non-accelerated filer.  See definition of
"accelerated filer and large accelerated filer" in Rule 12b-2 of the Exchange
Act.  (Check one):

Large accelerated filer ___   Accelerated filer ___   Non-accelerated filer  X


         Indicate by check mark  whether  the  registrant  is  a  shell  company
(as defined in Rule 12b-2 of the Act).  Yes___  No  X

         All of the common  stock of the registrant  is held by Morgan  Stanley.
As of March 11, 2008,  1,000  shares of common stock, par value $1.00 per share,
were outstanding.

                    DOCUMENTS INCORPORATED BY REFERENCE:

         The following reports of Morgan Stanley: Quarterly Report on Form 10-Q
for the quarterly period ended May 31, 2007; Annual Report on Form 10-K for the
fiscal year ended November 30, 2007; Quarterly Report on Form 10-Q for the
quarterly period ended February 29, 2008; and all other documents subsequently
filed by Morgan Stanley pursuant to Sections 13(a), 13(c), 14 or 15(d) of the
Securities Exchange Act of 1934, during the fiscal year covered by this Report
on Form 10-K, which contain financial statements of Morgan Stanley or which
amend the foregoing reports.


<PAGE>


                                 PART I

ITEM 1.      BUSINESS

             Not Applicable

ITEM 1A.     RISK FACTORS

             Not Applicable

ITEM 1B.     UNRESOLVED STAFF COMMENTS

             None

ITEM 2.      PROPERTIES

             Not Applicable

ITEM 3.      LEGAL PROCEEDINGS

             Not Applicable

ITEM 4.      SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

             Not Applicable

                                 PART II

ITEM 5.      MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER
             MATTERS

             Not Applicable

ITEM 6.      SELECTED FINANCIAL DATA

             Not Applicable

ITEM 7.      MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
             RESULTS OF OPERATIONS

             Not Applicable

ITEM 7A.     QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

             Not Applicable


<PAGE>


ITEM 8.     FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

            Not Applicable

ITEM 9.     CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
            FINANCIAL DISCLOSURE

            Not Applicable

ITEM 9A.    CONTROLS AND PROCEDURES

            Not Applicable

ITEM 9B.    OTHER INFORMATION

            None

                                 PART III

ITEM 10.    DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

            None

ITEM 11.    EXECUTIVE COMPENSATION

            Not Applicable

ITEM 12.    SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

            Not Applicable

ITEM 13.    CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

            Not Applicable

ITEM 14.    PRINCIPAL ACCOUNTING FEES AND SERVICES

            Not Applicable

<PAGE>

            ADDITIONAL DISCLOSURE ITEMS PURSUANT TO REGULATION AB

ITEM 1112(b). SIGNIFICANT OBLIGORS OF POOL ASSETS

         J. C. Penney Company, Inc., the underlying security guarantor with
respect to the Units, is a "significant obligor" with respect to the assets of
the Trust for purposes of Item 1112 of Regulation AB. For any financial
statements of the J. C. Penney Company, Inc. required to be provided under
Regulation S-X during the period since the initial issuance of the Units, this
Form 10-K report refers, pursuant to Item 1100(c)(2) of Regulation AB, to the
periodic reports of J. C. Penney Company, Inc. under section 13(a) or 15(d) of
the Exchange Act ("Underlying Security Issuer Exchange Act Reports") that are on
file with the Securities and Exchange Commission (the "SEC"). Such Underlying
Security Issuer Exchange Act Reports may be accessed at the public reference
facilities maintained by the SEC at Room 1024, 100 F Street, NE, Washington,
D.C. 20549. Copies of those materials can be obtained by making a written
request to the SEC, Public Reference Section, 100 F Street, NE, Washington, D.C.
20549, at prescribed rates. The SEC also maintains a website on the internet at
http://www.sec.gov at which users can view and download copies of reports,
proxy, information statements and other information filed electronically. The
SEC file number for J. C. Penney Company, Inc. is 001-00777.

         The underlying security guarantor financial statements and Underlying
Security Issuer Exchange Act Reports referred to above are not incorporated by
reference in this Form 10-K report; and the Trust, the Trustee, the depositor,
the sponsor and their affiliates have not verified, have not undertaken to
verify, and will not verify, the content of any such underlying security
guarantor financial statements or Underlying Security Issuer Exchange Act
Reports.

ITEM 1114(b)(2). CREDIT ENHANCEMENT AND OTHER SUPPORT, EXCEPT CERTAIN
DERIVATIVES INSTRUMENTS

         None

ITEM 1115(b). CERTAIN DERIVATIVES INSTRUMENTS - FINANCIAL INFORMATION

         None

ITEM 1117. LEGAL PROCEEDINGS

         None

ITEM 1119. AFFILIATIONS AND CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

         None

ITEM 1122. COMPLIANCE WITH APPLICABLE SERVING CRITERIA

         See Exhibits 33.1 and 34.1 to this Annual Report.

         LaSalle Bank National  Association's  ("LaSalle")  Report on Assessment
of Compliance with Servicing  Criteria for 2007 (the "2007 Assessment") attached
to  this  Report  on  Form  10-K  describes in Appendix B the following material
instance of noncompliance related to investor reporting:


<PAGE>


         "1122(d)(3)(i)(A)  and (B) -  During  the  Reporting  Period,   certain
monthly investor or remittance reports were not prepared  in accordance with the
terms set forth in the  transaction  agreements  and  certain  investor  reports
did  not  provide  the  information  calculated  in  accordance  with  the terms
specified in the transaction  agreements for which certain individual errors may
or may not have been material."

         The investor   reporting errors identified on LaSalle's 2007 Assessment
as  material  instances  of  noncompliance  (the  "Investor  Reporting  Errors")
included, for example, revised delinquency, REO, foreclosure, repurchase, payoff
or modified loan counts,  category indicators  and/or  balances. The  conclusion
that  the   Investor   Reporter   Errors   amounted  to  a material  instance of
noncompliance  was  based primarily on the aggregate number of errors as opposed
to the materiality of any one error.

         The  Investor  Reporter  Errors  were  generally  caused by human error
resulting  primarily from high volume monthly data  processing  demands that had
to be addressed within constricted time frames with less than a full  complement
of operational   staff.  Between the fourth quarter of the Reporting  Period and
the date of the 2007  Assessment, LaSalle has employed   additional  operational
staff to accommodate the high volume of monthly investor reporting  requirements
and  minimize  the  risk  of  the  Investor  Reporting  Errors  recurring. Other
necessary  controls are in place to minimize the risk of such errors.

         With respect  to the  specific pool assets and asset-backed  securities
related to the Investor  Reporting  Errors, the errors did not have, and are not
reasonable  likely in the future to have, any material  impact or effect on pool
asset  performance,  servicing  of  the  pool  assets  and  payments or expected
payments on the mortgage-backed securities.


ITEM 1123. SERVICER COMPLIANCE STATEMENT

         See Exhibit 35.1 to this Annual Report.


<PAGE>



                                 PART IV

ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES

         (a) The following documents are filed as part of this Report:

                (1) Financial Statements: Distribution Reports on Form 10-D
                are hereby incorporated by reference. See the table below:

<TABLE>
<CAPTION>
SATURNS Trust No.:   Closing Date        Payment Dates                 Form 10-D Filing Dates

                                                                           For FY 2007
<S>                  <C>                 <C>                           <C>
2007-1                March 1, 2007       September 1 and March 1       September 19, 2007
</TABLE>

                (2) Financial Statement Schedules pursuant to Item 8: Not
                    Applicable

                (3) Exhibits:

Exhibit 31.1    Rule 13a-14(d) Certification

Exhibit 33.1    Report of LaSalle Bank National Association on Assessment of
                Compliance with Servicing Criteria for Asset-Backed Securities

Exhibit 34.1    Attestation Report of Ernst & Young, LLP on Assessment of
                Compliance with Servicing Criteria for Asset-Backed Securities

Exhibit 35.1    Servicer Compliance Statement


         (b) Exhibits: See Item 15(a)(3) above

         (c) Other Financial Statement Schedules: Not applicable


<PAGE>



                                 SIGNATURES

         Pursuant to the requirements  of Section 13  or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.



         Date:  March 24, 2008

                                                  MS STRUCTURED ASSET CORP.
                                                  (Registrant)



                                                  By:      /s/Madhu Philips
                                                     ---------------------------
                                                  Name:    Madhu Philips
                                                  Title:   Vice President


<PAGE>


                                                                    Exhibit 31.1
                          RULE 13a-14(d) Certification

I, Madhu Philips, certify that:

1.       I have reviewed this report on Form 10-K and all reports on Form 10-D
required to be filed in respect of the period covered by this report on Form
10-K of SATURNS Trust No. 2007-1 (the "Exchange Act periodic reports");

2.       Based on my knowledge, the Exchange Act periodic reports, taken as a
whole, do not contain any untrue statement of a material fact or omit to state a
material fact necessary to make the statements made, in light of the
circumstances under which such statements were made, not misleading with respect
to the period covered by this report;

3.       Based on my knowledge, all of the distribution, servicing and other
information required to be provided under Form 10-D for the period covered by
this report is included in the Exchange Act periodic reports;

4.       Based on my knowledge and the servicer compliance statement(s) required
in this report under Item 1123 of Regulation AB, and except as disclosed in the
Exchange Act periodic reports, the servicer, LaSalle Bank National Association,
as Trustee of SATURNS Trust No. 2007-1, has fulfilled its obligations under the
servicing agreement, which is the Trust Agreement relating to SATURNS Trust
No. 2007-1; and

5.       All of the reports on assessment of compliance with servicing criteria
for asset-backed securities and their related attestation reports on assessment
of compliance with servicing criteria for asset-backed securities required to
be included in this report in accordance with Item 1122 of Regulation AB and
Exchange Act Rules 13a-18 and 15d-18 have been included as an exhibit to this
report, except as otherwise disclosed in this report. Any material instances of
noncompliance described in such reports have been disclosed in this report on
Form 10-K.

In giving the certifications above, I have reasonably relied on information
provided to me by the following unaffiliated parties: LaSalle Bank National
Association and its officers and agents.



                                                   By:      /s/Madhu Philips
                                                        ------------------------
                                                   Name:    Madhu Philips
                                                   Title:   Vice President
                                                   Date:    March 24, 2008


<PAGE>


                                                                    Exhibit 33.1

             Report on Assessment of Compliance with Servicing Criteria



LaSalle  Bank  National  Association   ("LaSalle") is  responsible for assessing
compliance with the servicing criteria applicable to it under  paragraph  (d) of
Item 1122 of Regulation AB (17 C.F.R,  229.1122(d)),  as of and for the 12-month
period ending December  31, 2007 (the  "Reporting   Period"),   as set  forth in
Appendix  A  hereto.   The   transactions   covered  by  this  report    include
mortgage-backed securities transactions for which  LaSalle,  as trustee,  paying
agent, or custodian, performed servicing  activities,  which  transactions  were
initially  closed on or after January 1, 2006, and that were registered with the
Securities and Exchange Commission  pursuant to the  Securities Act of 1933 (the
"Platform").   LaSalle used the criteria set forth in paragraph (d) of Item 1122
of Regulation AB to assess its compliance with the applicable servicing criteria
for the Reporting Period with respect  to  the  Platform.  The  criteria  listed
in the column titled  "Servicing  Criteria Inapplicable to LaSalle Bank National
Association (as trustee, paying agent, or  custodian)"  on Appendix A hereto are
inapplicable   to  LaSalle  based  on the  activities it performs in its role as
 trustee,  paying agent,  or custodian with respect to the Platform.

Except as identified on Appendix B hereto, LaSalle has complied, in all material
respects, with the applicable servicing criteria identified in Appendix A hereto
for the Reporting Period with respect to the Platform taken as a whole.

PricewaterhouseCoopers LLP, an independent registered public accounting firm has
issued  an  attestation   report  on  LaSalle's  compliance  with the applicable
servicing criteria for the Reporting Period.

February 29, 2008

                                               LaSalle Bank National Association


                                                 By:    /s/Barbara L. Marik
                                                      --------------------------
                                                   Name:   Barbara L. Marik
                                                   Title:  Senior Vice President


<PAGE>


                             Appendix A
<TABLE>
<CAPTION>
                                                                              Servicing          Servicing
                                                                               Criteria           Criteria
                                                                             Applicable to      Inapplicable
                                                                              LaSalle Bank       to LaSalle
   Reg AB                          Servicing Criteria                          National         Bank National
  Reference                                                                  Association (as     Association
                                                                             trustee, paying    (as trustee,
                                                                              agent, or        paying agent,
                                                                              custodian)       or custodian)
                             General Servicing Considerations
<S>              <C>                                                          <C>               <C>
 1122(d)(1)(i)   Policies and procedures are instituted to monitor any
                 performance or other triggers and events of default in
                 accordance with the transaction agreements.                       X

1122(d)(1)(ii)   If any material servicing activities are outsourced to
                 third parties, policies and procedures are instituted to
                 monitor the third party's performance and compliance with
                 such servicing activities.                                        X(1)

1122(d)(1)(iii)  Any requirements in the transaction agreements to                                     X
                 maintain a back-up servicer for the Pool Assets are
                 maintained.

1122(d)(1)(iv)   A fidelity bond and errors and omissions policy is in
                 effect on the party participating in the servicing
                 function throughout the reporting period in the amount of         X
                 coverage required by and otherwise in accordance with the
                 terms of the transaction agreements.

                             Cash Collection and Administration

1122(d)(2)(i)    Payments on pool assets are deposited into the
                 appropriate custodial bank accounts and related bank
                 clearing accounts no more than two business days
                 following receipt, or such other number of days specified         X
                 in the transaction agreements.

1122(d)(2)(ii)   Disbursements made via wire transfer on behalf of an
                 obligor or to an investor are made only by authorized             X
                 personnel.

1122(d)(2)(iii)  Advances of funds or guarantees regarding collections,
                 cash flows or distributions, and any interest or other
                 fees charged for such advances, are made, reviewed and            X(2)
                 approved as specified in the transaction agreements.

1122(d)(2)(iv)   The related accounts for the transaction, such as cash
                 reserve accounts or accounts established as a form of
                 over collateralization, are separately maintained (e.g.,          X
                 with respect to commingling of cash) as set forth in the
                 transaction agreements.

1122(d)(2)(v)    Each custodial account is maintained at a federally
                 insured depository institution as set forth in the
                 transaction agreements. For purposes of this criterion,
                 "federally insured depository institution" with respect           X
                 to a foreign financial institution means a foreign
                 financial institution that meets the requirements of Rule
                 13k-1(b)(1) of the Securities Exchange Act.

1122(d)(2)(vi)   Unissued checks are safeguarded so as to prevent                  X
                 unauthorized access.

1122(d)(2)(vii)  Reconciliations are prepared on a monthly basis for all
                 asset-backed securities related bank accounts, including
                 custodial accounts and related bank clearing accounts.
                 These reconciliations are (A) mathematically accurate;
                 (B) prepared

___________________
(1) No material servicing activities are outsourced to third parties.
(2) No advances were made during the Reporting Period.
</TABLE>
<PAGE>

<TABLE>
<S>              <C>                                                         <C>               <C>
                 within 30 calendar days after the bank statement cutoff
                 date, or such other number of days specified in the
                 transaction agreements; (C) reviewed and approved by              X
                 someone other than the person who prepared the
                 reconciliation; and (D) contain explanations for
                 reconciling items. These reconciling items are resolved
                 within 90 calendar days of their original
                 identification, or such other number of days specified
                 in the transaction agreements.

                             Investor Remittances and Reporting

1122(d)(3)(i)    Reports to investors, including those to be filed with
                 the Commission, are maintained in accordance with the
                 transaction agreements and applicable Commission
                 requirements. Specifically, such reports (A) are prepared
                 in accordance with timeframes and other terms set forth
                 in the transaction agreements; (B) provide information
                 calculated in accordance with the terms specified in the
                 transaction agreements; (C) are filed with the Commission
                 as required by its rules and regulations; and (D) agree
                 with investors' or the indenture trustee's records as to          X
                 the total unpaid principal balance and number of Pool
                 Assets serviced by the related Servicer.

1122(d)(3)(ii)   Amounts due to investors are allocated and remitted in
                 accordance with timeframes, distribution priority and             X
                 other terms set forth in the transaction agreements.

1122(d)(3)(iii)  Disbursements made to an investor are posted within two
                 business days to the related Servicer's investor records,
                 or such other number of days specified in the transaction         X
                 agreements.

1122(d)(3)(iv)   Amounts remitted to investors per the investor reports
                 agree with cancelled checks, or other form of payment, or         X
                 custodial bank statements.

                                 Pool Asset Administration

1122(d)(4)(i)    Collateral or security on pool assets is maintained as
                 required by the transaction agreements or related pool
                 asset documents.                                                  X

1122(d)(4)(ii)   Pool assets and related documents are safeguarded as              X
                 required by the transaction agreements

1122(d)(4)(iii)  Any additions, removals or substitutions to the asset
                 pool are made, reviewed and approved in accordance with
                 any conditions or requirements in the transaction                 X
                 agreements.

1122(d)(4)(iv)   Payments on pool assets, including any payoffs, made in                               X
                 accordance with the related pool asset documents are
                 posted to the related Servicer's obligor records
                 maintained no more than two business days after receipt,
                 or such other number of days specified in the transaction
                 agreements, and allocated to principal, interest or other
                 items (e.g., escrow) in accordance with the related pool
                 asset documents.

1122(d)(4)(v)    The related Servicer's records regarding the pool assets                              X
                 agree with the related Servicer's records with respect to
                 an obligor's unpaid principal balance.

1122(d)(4)(vi)   Changes with respect to the terms or status of an                                     X
                 obligor's pool assets (e.g., loan modifications or
                 re-agings) are made, reviewed and approved by authorized
                 personnel in accordance with the transaction agreements
                 and related pool asset documents.

1122(d)(4)(vii)  Loss mitigation or recovery actions (e.g., forbearance                                X
                 plans, modifications and deeds in lieu of foreclosure,
                 foreclosures and repossessions, as applicable) are
                 initiated, conducted and concluded in accordance with the
                 timeframes or other requirements established by the
                 transaction agreements.
</TABLE>
<PAGE>

<TABLE>
<S>              <C>                                                         <C>               <C>
1122(d)(4)(viii) Records documenting collection efforts are maintained                                 X
                 during the period a pool asset is delinquent in
                 accordance with the transaction agreements. Such records
                 are maintained on at least a monthly basis, or such other
                 period specified in the transaction agreements, and
                 describe the entity's activities in monitoring delinquent
                 pool assets including, for example, phone calls, letters
                 and payment rescheduling plans in cases where delinquency
                 is deemed temporary (e.g., illness or unemployment).

 1122(d)(4)(ix)  Adjustments to interest rates or rates of return for pool                             X
                 assets with variable rates are computed based on the
                 related pool asset documents.

 1122(d)(4)(x)   Regarding any funds held in trust for an obligor (such as                             X
                 escrow accounts): (A) such funds are analyzed, in
                 accordance with the obligor's pool asset documents, on at
                 least an annual basis, or such other period specified in
                 the transaction agreements; (B) interest on such funds is
                 paid, or credited, to obligors in accordance with
                 applicable pool asset documents and state laws; and (C)
                 such funds are returned to the obligor within 30 calendar
                 days of full repayment of the related pool assets, or
                 such other number of days specified in the transaction
                 agreements.

 1122(d)(4)(xi)  Payments made on behalf of an obligor (such as tax or                                 X
                 insurance payments) are made on or before the related
                 penalty or expiration dates, as indicated on the
                 appropriate bills or notices for such payments, provided
                 that such support has been received by the servicer at
                 least 30 calendar days prior to these dates, or such
                 other number of days specified in the transaction
                 agreements.

1122(d)(4)(xii)  Any late payment penalties in connection with any payment                             X
                 to be made on behalf of an obligor are paid from the
                 related Servicer's funds and not charged to the obligor,
                 unless the late payment was due to the obligor's error or
                 omission.

1122(d)(4)(xiii) Disbursements made on behalf of an obligor are posted                                 X
                 within two business days to the obligor's records
                 maintained by the servicer, or such other number of days
                 specified in the transaction agreements.

1122(d)(4)(xiv)  Delinquencies, charge-offs and uncollectible accounts are                             X
                 recognized and recorded in accordance with the
                 transaction agreements.

 1122(d)(4)(xv)  Any external enhancement or other support, identified in
                 Item 1114(a)(1) through (3) or Item 1115 of Regulation
                 AB, is maintained as set forth in the transaction                 X
                 agreements.
</TABLE>


<PAGE>


                                   Appendix B


                 Material Instances of Noncompliance by LaSalle

1122(d)(3)(i)(A) and (B) - During the Reporting Period, certain monthly investor
or  remittance  reports were not prepared in accordance with the terms set forth
in the transaction  agreements  and certain  investor  reports  did not  provide
the   information  calculated  in  accordance  with  the terms  specified in the
transaction  agreements for which certain individual errors may or may not  have
been material.


<PAGE>


                                                                    Exhibit 34.1

             Report of Independent Registered Public Accounting Firm


To LaSalle Bank National Association:

We have examined LaSalle Bank National Association's (the "Company")  compliance
with  the  servicing  criteria  set  forth in Item 1122(d) of the Securities and
Exchange   Commission's   Regulation  AB  for  the   mortgage-backed  securities
transactions for  which  LaSalle,   as  trustee,   paying  agent,  or custodian,
performed  servicing  activities,  which  transactions  were initially closed on
or after  January 1, 2006,  and that were  registered  with the  Securities  and
Exchange   Commission  pursuant  to  the Securities Act of 1933 (the "Platform")
described in the accompanying  Report on Assessment of Compliance with Servicing
Criteria  (the "Compliance Statement"), as of December 31, 2007 and for the year
then  ended,   excluding  criteria   1122(d)(1)(iii)   and  1122(d)(4)(iv)-(xiv)
which the Company has  determined are not applicable to the servicing activities
performed by it with respect to the Platform.  Management is responsible for the
Company's   compliance with the servicing  criteria.  Our responsibility  is  to
express  an  opinion  on  the  Company's  compliance with the servicing criteria
based on our examination.

Our   examination   was  conducted  in accordance  with  standards of the Public
Company Accounting Oversight  Board (United States)  and,  accordingly, included
examining,  on a test  basis,  evidence  about  the  Company's  compliance  with
the applicable  servicing criteria and performing  such  other  procedures as we
considered   necessary  in the  circumstances.  Our examination included testing
of selected asset-backed transactions and securities that comprise the Platform,
testing  of  selected   servicing   activities   related  to  the Platform,  and
determining   whether  the  Company  processed  those selected transactions  and
performed   those   selected   activities  in  compliance  with  the  applicable
servicing criteria. Our procedures were limited to the selected transactions and
servicing activities  performed by the Company during the period covered by this
report.  Our  procedures  were not  designed  to detect   noncompliance  arising
from errors that may have occurred  prior to or subsequent to our tests that may
have  affected  the  balances  or amounts  calculated or reported by the Company
during the period  covered by this report.  We  believe  that  our   examination
provides a reasonable  basis for our opinion.  Our examination does not  provide
a legal determination on the Company's compliance with the servicing criteria.

Our  examination  disclosed  the  following  material   noncompliance  with  the
servicing  criteria  set  forth  in  Item 1122(d)(3)(i)(A) and (B) of Regulation
AB applicable  to the Company  during the year ended  December 31, 2007. Certain
reports to investors did not include certain  required information in accordance
with terms  set  forth  in  the transaction  agreements  and  certain reports to
investors did  not provide  information  calculated in accordance with the terms
specified in the transaction agreements.

In our  opinion,  except  for  the   material   noncompliance  described  in the
preceding  paragraph,  LaSalle  Bank  National Association  complied with the
aforementioned  applicable  servicing  criteria  as  of  and  for the year ended
December 31, 2007 for the Platform, in all material respects.


/s/PricewaterhouseCoopers L.L.P.
February 29, 2008


<PAGE>


                                                                    Exhibit 35.1

                          Servicer Compliance Statement

                       [On LaSalle Bank ABN AMRO Letterhead]



                        Annual Statement of Compliance



MS Structured Asset Corp.
1585 Broadway
New York, New York 10036

Re: TRUST AGREEMENT, between MS Structured Asset Corp. (the "Depositor") and
LaSalle Bank National Association (the "Trustee"), made as of the date February
28, 2007 relating to SATURNS Trust No. 2007-1 (the "Agreement").

         I, Barbara L. Marik, a Senior Vice President of LaSalle Bank National
Association, as Trustee hereby certify that:

         (1) A review of the activities of the Trustee during the preceding
calendar year and of the performance of the Trustee under the Agreement has been
made under my supervision; and

         (2) To the best of my knowledge, based on such review, the Trustee has
fulfilled all its obligations under the Agreement in all material respects
throughout such year or a portion thereof.



Date:       February 27, 2008
         --------------------

LaSalle Bank National Association, as Trustee


         /s/ Barbara L. Marik
         --------------------------
Name:  Barbara L. Marik
Title: Senior Vice President