AMENDMENT TO AMENDED AND RESTATED MUTUAL FUND CUSTODY AND SERVICES AGREEMENT

EX-99.23(g)(25)

                                  AMENDMENT TO
                              AMENDED AND RESTATED
                             MUTUAL FUND CUSTODY AND
                               SERVICES AGREEMENT


     This  Amendment  dated the 14th day of August,  2008,  to the  Amended  and
Restated Mutual Fund Custody and Service  Agreement  effective as of May 1, 2001
(the "Agreement") by and between JNL Series Trust and JNL Investors Series Trust
(each  individually  the "Trust") and The Bank of New York Mellon  (successor by
operation of law to Mellon Trust of New England, N.A.) ("Custodian").

     WHEREAS, the Trust and the Custodian have entered into the Agreement;

     WHEREAS,  in order to reflect a change in Authorized  Persons to add Xxxxxx
Childs.

     NOW, THEREFORE, the parties hereto agree to amend the Agreement as follows:

1.   To delete  Appendix A of the  Agreement  and  substitute it with Appendix A
     attached hereto.

2.   Except as specifically  amended hereby,  the Agreement shall remain in full
     force and effect in accordance with its terms.

3.   The Trust and the Custodian  hereby each represent and warrant to the other
     that it has full  authority to enter into this Amendment upon the terms and
     conditions  hereof and that the individual  executing this Amendment on its
     behalf has the  requisite  authority to bind the Trust or Custodian to this
     Amendment.

     IN WITNESS  WHEREOF,  the parties hereto have executed this Amendment as of
the date set forth above.


JNL SERIES TRUST                                     THE BANK OF NEW YORK MELLON
JNL INVESTORS SERIES TRUST
By:    /s/ Xxxx X. Xxxxx                             By: /s/ Xxxxxxx X. Xxxxxx
Name:  Xxxx X. Xxxxx                                 Name:   Xxxxxxx X. Xxxxxx
Title: President                                     Title:  President

                                   APPENDIX A
                           LIST OF AUTHORIZED PERSONS

     I,  Xxxxx X.  Xxxx,  the  Secretary  of the JNL  Series  Trust  and the JNL
Investors  Series  Trust,  a  business  trust  organized  under  the laws of the
Commonwealth  of  Massachusetts  (each  individually,  the  "Trust"),  do hereby
certify that:

     The following  individuals have been duly authorized as Authorized  Persons
to give  Instructions  on behalf of the  Trust  and each  Fund  thereof  and the
specimen signatures set forth opposite their respective names are their true and
correct signatures:

NAME                                           SIGNATURE

Xxxx Xxxxxxxx                                  /s/ Xxxx Xxxxxxxx


Xxxxxx Childs                                  /s/ Xxxxxx Childs


Xxxxx X. Xxxxxxx                               /s/ Xxxxx X. Xxxxxxx


Xxxxxx X. Xxxxxxxxx                            /s/ Xxxxxx X. Xxxxxxxxx


J. Xxxxx Xxxxxx                                /s/ J. Xxxxx Xxxxxx


Xxxxxx X. Xxxxx                                /s/ Xxxxxx X. Xxxxx


Xxxxxx XxXxxxxxxx                              /s/ Xxxxxx XxXxxxxxxx


Xxxx Xxxxxx                                    /s/ Xxxx Xxxxxx


Xxxx X. Xxxxx                                  /s/ Xxxx X. Xxxxx


Xxxxxxx Xxxxxxxx                               /s/ Xxxxxxx Xxxxxxxx


Xxxxx X. Xxxx                                  /s/ Xxxxx X. Xxxx


                                               JNL SERIES TRUST
                                               JNL INVESTORS SERIES TRUST

                                               By:/s/ Xxxxx X. Xxxx
                                               Name:  Xxxxx X. Xxxx,
                                                      Secretary
                                               Dated: August 14, 2008