SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event

Reported): August 17, 2005

J.P. MORGAN ACCEPTANCE CORPORATION I

J.P. MORGAN MORTGAGE ACQUISITION CORP. 2005-OPT1

J.P. MORGAN ACCEPTANCE CORPORATION I
(Exact name of registrant as specified in its charter)
Delaware	333-121990	13-3475488
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

270 Park Avenue New York, New York 10017
(Address of Principal Executive Offices) (Zip Code)

Registrant’s telephone number, including area code (212) 834-3850

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

[ ]	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
[ ]	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
[ ]	Pre-commencement communications pursuant to Rule 14d-2(d) under the Exchange Act (17 CFR 240.14d-2(b))
[ ]	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01. Other Events.

On July 26, 2005, J.P. Morgan Acceptance Corporation I (the “Company”) entered into a Pooling and Servicing Agreement dated as of July 1, 2005 (the “Pooling and Servicing Agreement”), by and among the Company, as depositor, J.P. Morgan Mortgage Acquisition Corp., as seller, Option One Mortgage Corporation, as servicer (the “Servicer”) JPMorgan Chase Bank, National Association, as securities administrator (the “Securities Administrator”) and U.S. Bank National Association, as trustee (the “Trustee”), providing for the issuance of J.P. Morgan Mortgage Acquisition Corp. 2005-OPT1, Asset-Backed Pass-Through Certificates. The Pooling and Servicing Agreement is annexed hereto as Exhibit 99.1.

Item 9.01. Financial Statements and Exhibits.

(a) Financial statements of businesses acquired:

Not applicable.

(b) Pro forma financial information:

Not applicable.

Exhibit No.

Description

99.1

The Pooling and Servicing Agreement, dated as of July 1, 2005, by and among the Company, the Seller, the Servicer, the Securities Administrator and the Trustee.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

J.P. MORGAN ACCEPTANCE CORPORATION I

By: /s/ Paul H. White

Name: Paul H. White

Title: Vice President

Dated: August 17, 2005

Exhibit Index

99.1

The Pooling and Servicing Agreement

J.P. Morgan Mortgage Acquisition Corp. 2005-OPT1 8-K