UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 10-K

(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

/ / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934
For the transition period from ____________ to ____________

Commission file number: 333-141008-07

Deutsche Alt-A Securities Mortgage Loan Trust, Series 2007-1
(exact name of issuing entity as specified in its charter)

ACE Securities Corp.
(exact name of the depositor as specified in its charter)

DB Structured Products, Inc.
(exact name of the sponsor as specified in its charter)

Delaware 56-2088493
(State or other jurisdiction of (I.R.S. Employer
incorporation or organization) Identification No.)

6525 Morrison Boulevard
Suite 318
Charlotte, NC 28211
(Address of principal executive (Zip Code)
offices)

Telephone number, including area code: (704) 365-0569

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

NONE.

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

NONE.

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 Section 15(d) of the Act.

Yes ___ No X

Indicate by check mark whether the 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 (Section 229.405 of this chapter) 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.

Not applicable.

Indicate by check mark whether the registrant is a large accelerated filer,
an accelerated filer, a non-accelerated filer, or a smaller reporting
company. See the definitions of "large accelerated filer", "accelerated
filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer ___
Accelerated filer ___
Non-accelerated filer X
Smaller reporting company ___

Indicate by check mark whether the registrant is a shell company (as defined
in Rule 12b-2 of the Act).

Yes ___ No X

State the aggregate market value of the voting and non-voting common equity
held by non-affiliates computed by reference to the price at which the
common equity was last sold, or the average bid and asked price of such
common equity, as of the last business day of the registrant's most recently
completed second fiscal quarter.

Not applicable.

Indicate by check mark whether the registrant has filed all documents and
reports required to be filed by Section 12, 13 or 15(d) of the Securities
Exchange Act of 1934 subsequent to the distribution of securities under a
plan confirmed by a court.

Not applicable.

Indicate the number of shares outstanding of each of the registrant's
classes of common stock, as of December 31, 2007.

Not applicable.

DOCUMENTS INCORPORATED BY REFERENCE

List hereunder the following documents if incorporated by reference and the
Part of the Form 10-K (e.g., Part I, Part II, etc.) into which the document
is incorporated: (1)Any annual report to security holders; (2) Any proxy or
information statement; and (3)Any prospectus filed pursuant to Rule 424(b)
or (c) under the Securities Act of 1933. The listed documents should be
clearly described for identification purposes (e.g., annual report to
security holders for fiscal year ended December 24, 1980).

Not applicable.

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, Related Stockholder
Matters and Issuer Purchases of Equity Securities.

Not applicable.

Item 6. Selected Financial Data.

Not applicable.

Item 7. Management's Discussion and Analysis of Financial Condition and
Results of Operation.

Not applicable.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

Not applicable.

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 9A(T). Controls and Procedures.

Not applicable.

Item 9B. Other Information.

None.

PART III

Item 10. Directors, Executive Officers and Corporate Governance.

Not applicable.

Item 11. Executive Compensation.

Not applicable.

Item 12. Security Ownership of Certain Beneficial Owners and Management
and Related Stockholder Matters.

Not applicable.

Item 13. Certain Relationships and Related Transactions, and Director
Independence.

Not applicable.

Item 14. Principal Accounting Fees and Services.

Not applicable.

ADDITIONAL DISCLOSURE ITEMS PURSUANT TO GENERAL INSTRUCTION J

Item 1112(b) of Regulation AB, Significant Obligor Financial Information.

No single obligor represents 10% or more of the pool assets held by the issuing
entity.

Item 1114(b)(2) of Regulation AB, Significant Enhancement Provider Financial
Information.

MBIA Insurance Corporation provides a certificate insurance policy as credit
enhancement for the Class I-A-4A Certificates as disclosed in the Rule 424(b)
Prospectus filing with the Commission on July 3, 2007, Commission File Number
333-141008-07, CIK Number 0001403152. No additional disclosure is necessary
because such entity does not provide payments representing 10% or more of the
cashflows to such class of certificates, as of December 31, 2007.

Item 1115(b) of Regulation AB, Certain Derivatives Instruments (Financial
Information).

Deutsche Bank AG, New York Branch provides swap derivative instruments for the
trust as disclosed in the Rule 424(b) Prospectus filing with the Commission on
July 3, 2007, Commission File Number 333-141008-07, CIK Number 0001403152. No
additional disclosure is necessary because the significance percentage for the
swap agreements is less than 10%, as of December 31, 2007.

Swiss Re Financial Products Corporation provides a floor derivative instrument
for the trust as disclosed in the Rule 424(b) Prospectus filing with the
Commssion on July 3, 2007, Commission File Number 333-141008-07, CIK Number
0001403152. No additional disclosure is necessary because the significance
percentage for the floor agreement is less than 10%, as of December 31, 2007.

Item 1117 of Regulation AB, Legal Proceedings.

The registrant know of no material pending legal proceedings involving the
parties contemplated by Rule 1117 of Regulation AB, other than routine
litigation incidental to the duties of such respective parties.

Item 1119 of Regulation AB, Affiliations and Certain Relationships and Related
Transactions.

The information regarding this Item has been previously filed in a 424(b)(5)
filing with the Commission on July 3, 2007, Commission File Number
333-141008-07, CIK Number 0001403152.

Item 1122 of Regulation AB, Compliance with Applicable Servicing Criteria.

The reports on assessment of compliance with the servicing criteria for
asset-backed securities and the related attestation reports on such assessments
of compliance are attached hereto under Item 15.

The following parties have reported one or more instances of material
noncompliance with applicable servicing criteria in their reports on assessments
of compliance:

Assurant, Inc. disclosed the following material noncompliance with the
servicing criteria set forth in Item 1122(d)(4)(xii) of Regulation AB
applicable to the Company during the year ended December 31, 2007. As required
by Item 1122(d)(4)(xii) of Regulation AB, any late payment penalties in
connection with any payment to be made on behalf of an obligor are paid from
the servicer's funds are not charged to the obligor, unless the late payment
was due to the obligor's error or omission. Assurant, Inc. did not have, during
the Reporting Period, sufficient policies and procedures to capture the
information with respect to the Platform Transactions necessary to determine
compliance with 1122(d)(4)(xii).

The assessment of compliance for GMAC Mortgage, LLC disclosed the following
material noncompliance, as applicable during the twelve months ended
December 31, 2007:

Certain custodial account reconciliations were not reviewed within timelines
outlined in the GMACM's policies and procedures, as required by criteria
1122 (d)(2)(vii)(C). Certain custodial accounts had reconciling items which
were not resolved within 90 calendar days of original identification, as
required by criteria 1122(d)(2)(vii)(D).

Although each servicing criterion required by Item 1122(d) of Regulation AB is
addressed in one or more of the Assessments of Compliance with Servicing
Criteria and related Attestation Reports included with this report, the
Assessments of Compliance of GMAC Mortgage, LLC, and Wachovia Mortgage
Corporation (the "Servicers") and related Attestation Reports did not address
each of the servicing criteria that the Servicers were required to address
under the terms of the related Servicing Agreements. The Servicers have not
identified such failure to provide an Assessment and Attestation for these
items as a material failure to fulfill its obligations under the related
servicing agreements in the Servicer's Compliance Statements provided under
Item 1123 of Regulation AB, because the Servicers assert that those items are
not applicable to the Servicers.

Item 1123 of Regulation AB, Servicer Compliance Statement.

The servicer compliance statements are attached hereto under Item 15.

Part IV

Item 15. Exhibits, Financial Statement Schedules.

(a) Exhibits.

(4) Pooling and Servicing Agreement dated as of June 1, 2007 among Ace
Securities Corp., as depositor, Wells Fargo Bank, N.A. as Master Servicer
and Securities Administrator, Clayton Fixed Income Services Inc., as credit
risk manager, and HSBC Bank USA, National Association as trustee
(incorporated herein by reference from Exhibit 4.1 of the Current Report on
Form 8-K/A of the registrant, as filed with the Commission on August 10,
2007, Commission File Number 333-141008-07, CIK number 0001403152).

(10) Incorporated by reference as Exhibit (4).

(31) Rule 13a-14(d)/15d-14(d) Certification.

(33) Reports on assessment of compliance with servicing criteria for
asset-backed securities.

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33.1 Assurant, Inc. as Sub-Contractor for GreenPoint Mortgage Funding, Inc.
33.2 Countrywide Home Loans Servicing LP as Servicer
33.3 Deutsche Bank National Trust Company as Custodian
33.4 First American Real Estate Solutions of Texas, L.P. as Sub-Contractor for Wachovia
Mortgage Corporation
33.5 GMAC Bank as Sub-Contractor for GMAC Mortgage, LLC f/k/a GMAC Mortgage Corporation
33.6 GMAC Mortgage, LLC f/k/a GMAC Mortgage Corporation as Servicer
33.7 GreenPoint Mortgage Funding, Inc. as Servicer
33.8 LandAmerica Tax and Flood Services, Inc. as Sub-Contractor for GreenPoint Mortgage
Funding, Inc.
33.9 Midfirst Bank as Named Servicer
33.10 Midland Mortgage as Sub-Servicer for Midfirst Bank
33.11 National City Mortgage Co. as Servicer
33.12 Regulus Group LLC as Sub-Contractor for National City Mortgage Co.
33.13 Wachovia Mortgage Corporation as Servicer
33.14 Wells Fargo Bank, N.A. as Servicer
33.15 Wells Fargo Bank, N.A. as Master Servicer and Securities Administrator
33.16 Wells Fargo Bank, N.A. as Paying Agent
33.17 Wells Fargo Bank, N.A. as Custodian
33.18 ZC Sterling Insurance Agency, Inc. as Sub-Contractor for Midfirst Bank and for
Midland Mortgage
33.19 ZC Sterling Insurance Agency, Inc. as Sub-Contractor for Wachovia Mortgage
Corporation

(34) Attestation reports on assessment of compliance with servicing criteria
for asset-backed securities.

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34.1 Assurant, Inc. as Sub-Contractor for GreenPoint Mortgage Funding, Inc.
34.2 Countrywide Home Loans Servicing LP as Servicer
34.3 Deutsche Bank National Trust Company as Custodian
34.4 First American Real Estate Solutions of Texas, L.P. as Sub-Contractor for Wachovia
Mortgage Corporation
34.5 GMAC Bank as Sub-Contractor for GMAC Mortgage, LLC f/k/a GMAC Mortgage Corporation
34.6 GMAC Mortgage, LLC f/k/a GMAC Mortgage Corporation as Servicer
34.7 GreenPoint Mortgage Funding, Inc. as Servicer
34.8 LandAmerica Tax and Flood Services, Inc. as Sub-Contractor for GreenPoint Mortgage
Funding, Inc.
34.9 Midfirst Bank as Named Servicer
34.10 Midland Mortgage as Sub-Servicer for Midfirst Bank
34.11 National City Mortgage Co. as Servicer
34.12 Regulus Group LLC as Sub-Contractor for National City Mortgage Co.
34.13 Wachovia Mortgage Corporation as Servicer
34.14 Wells Fargo Bank, N.A. as Servicer
34.15 Wells Fargo Bank, N.A. as Master Servicer and Securities Administrator
34.16 Wells Fargo Bank, N.A. as Paying Agent
34.17 Wells Fargo Bank, N.A. as Custodian
34.18 ZC Sterling Insurance Agency, Inc. as Sub-Contractor for Midfirst Bank and for
Midland Mortgage
34.19 ZC Sterling Insurance Agency, Inc. as Sub-Contractor for Wachovia Mortgage
Corporation

(35) Servicer compliance statement.

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35.1 Countrywide Home Loans Servicing LP as Servicer
35.2 GMAC Mortgage, LLC f/k/a GMAC Mortgage Corporation as Servicer
35.3 National City Mortgage Co. as Servicer
35.4 Wells Fargo Bank, N.A. as Servicer
35.5 Wells Fargo Bank, N.A. as Master Servicer and Securities Administrator

(b) Exhibits identified in paragraph (a) above.

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.

Deutsche Alt-A Securities Mortgage Loan Trust, Series 2007-1
(Issuing Entity)

Wells Fargo Bank, N.A.
(Master Servicer)

/s/ Kristen Ann Cronin
Kristen Ann Cronin, Vice President
(senior officer in charge of the servicing function of the master
servicer)

Date: March 27, 2008

Exhibit Index

Exhibit No.

(10) Incorporated by reference as Exhibit (4).

(31) Rule 13a-14(d)/15d-14(d) Certification.

(33) Reports on assessment of compliance with servicing criteria for
asset-backed securities.

<s> <c>
33.1 Assurant, Inc. as Sub-Contractor for GreenPoint Mortgage Funding, Inc.
33.2 Countrywide Home Loans Servicing LP as Servicer
33.3 Deutsche Bank National Trust Company as Custodian
33.4 First American Real Estate Solutions of Texas, L.P. as Sub-Contractor for Wachovia
Mortgage Corporation
33.5 GMAC Bank as Sub-Contractor for GMAC Mortgage, LLC f/k/a GMAC Mortgage Corporation
33.6 GMAC Mortgage, LLC f/k/a GMAC Mortgage Corporation as Servicer
33.7 GreenPoint Mortgage Funding, Inc. as Servicer
33.8 LandAmerica Tax and Flood Services, Inc. as Sub-Contractor for GreenPoint Mortgage
Funding, Inc.
33.9 Midfirst Bank as Named Servicer
33.10 Midland Mortgage as Sub-Servicer for Midfirst Bank
33.11 National City Mortgage Co. as Servicer
33.12 Regulus Group LLC as Sub-Contractor for National City Mortgage Co.
33.13 Wachovia Mortgage Corporation as Servicer
33.14 Wells Fargo Bank, N.A. as Servicer
33.15 Wells Fargo Bank, N.A. as Master Servicer and Securities Administrator
33.16 Wells Fargo Bank, N.A. as Paying Agent
33.17 Wells Fargo Bank, N.A. as Custodian
33.18 ZC Sterling Insurance Agency, Inc. as Sub-Contractor for Midfirst Bank and for
Midland Mortgage
33.19 ZC Sterling Insurance Agency, Inc. as Sub-Contractor for Wachovia Mortgage
Corporation

(34) Attestation reports on assessment of compliance with servicing
criteria for asset-backed securities.

<s> <c>
34.1 Assurant, Inc. as Sub-Contractor for GreenPoint Mortgage Funding, Inc.
34.2 Countrywide Home Loans Servicing LP as Servicer
34.3 Deutsche Bank National Trust Company as Custodian
34.4 First American Real Estate Solutions of Texas, L.P. as Sub-Contractor for Wachovia
Mortgage Corporation
34.5 GMAC Bank as Sub-Contractor for GMAC Mortgage, LLC f/k/a GMAC Mortgage Corporation
34.6 GMAC Mortgage, LLC f/k/a GMAC Mortgage Corporation as Servicer
34.7 GreenPoint Mortgage Funding, Inc. as Servicer
34.8 LandAmerica Tax and Flood Services, Inc. as Sub-Contractor for GreenPoint Mortgage
Funding, Inc.
34.9 Midfirst Bank as Named Servicer
34.10 Midland Mortgage as Sub-Servicer for Midfirst Bank
34.11 National City Mortgage Co. as Servicer
34.12 Regulus Group LLC as Sub-Contractor for National City Mortgage Co.
34.13 Wachovia Mortgage Corporation as Servicer
34.14 Wells Fargo Bank, N.A. as Servicer
34.15 Wells Fargo Bank, N.A. as Master Servicer and Securities Administrator
34.16 Wells Fargo Bank, N.A. as Paying Agent
34.17 Wells Fargo Bank, N.A. as Custodian
34.18 ZC Sterling Insurance Agency, Inc. as Sub-Contractor for Midfirst Bank and for
Midland Mortgage
34.19 ZC Sterling Insurance Agency, Inc. as Sub-Contractor for Wachovia Mortgage
Corporation

(35) Servicer compliance statement.

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35.1 Countrywide Home Loans Servicing LP as Servicer
35.2 GMAC Mortgage, LLC f/k/a GMAC Mortgage Corporation as Servicer
35.3 National City Mortgage Co. as Servicer
35.4 Wells Fargo Bank, N.A. as Servicer
35.5 Wells Fargo Bank, N.A. as Master Servicer and Securities Administrator