Exhibit 4.5

APPOINTMENT OF

SUCCESSOR ADMINISTRATORS

SOUTHWEST COMMUNITY STATUTORY TRUST I

This Appointment of Successor Administrators (this Appointment), is dated as of October 17, 2006, and is pursuant to Section 4.3(d) of the Amended and Restated Declaration of Trust between U.S. Bank National
Association as Institutional Trustee, Southwest Community Bancorp, as Sponsor, and the Administrators named therein, dated as of April 22, 2003 (the Amended and Restated Trust Agreement). Capitalized terms used herein and not
otherwise defined herein have the respective meanings ascribed thereto in the Amended and Restated Trust Agreement.

WHEREAS, James
A. Sundquist and Angelee J. Harris, as Administrators of Southwest Community Statutory Trust I under the Amended and Restated Trust Agreement, are to be removed as Administrators by Placer Sierra Bancshares in its capacity as the Holder of Common
Securities (the Common Securityholder) pursuant to Section 4.3(d) of the Amended and Restated Trust Agreement;

WHEREAS, the Common Securityholder wishes to appoint successor Administrators pursuant to Section 4.3(d) of the Amended and Restated Trust Agreement;

WHEREAS,Frank J. Mercardante, and Randall E. Reynoso, each a natural person over the age of 21, and the persons whom the Common Securityholder wishes to appoint as successor Administrators, wish to accept such
appointment pursuant to Section 4.3 of the Amended and Restated Trust Agreement; and

WHEREAS, David E. Hooston is currently an
Administrator and the Common Securityholder wishes him to remain as an Administrator under the Amended and Restated Trust Agreement.



| | 1. | James A. Sundquist and Angelee J. Harris, Administrators under the Amended and Restated Trust Agreement, are hereby removed as Administrators pursuant to Section 4.3(d) of the
Amended and Restated Trust Agreement by the Common Securityholder.
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| | 2. | The Common Securityholder hereby appoints Frank J. Mercardante and Randall E. Reynoso as successor Administrators. This Appointment, when executed and acknowledged by Frank
J. Mercardante and Randall E. Reynoso, the successor Administrators, and delivered to Southwest Community Statutory Trust I and the removed Administrators James A. Sundquist and Angelee J. Harris, shall constitute the instrument accepting such
appointment pursuant to Section 4.3(d) of the Amended and Restated Trust Agreement.
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| | 3. | Frank J. Mercardante and Randall E. Reynoso each hereby accept the appointment under the Amended and Restated Trust Agreement as successor Administrator, and accepts the
rights, powers, trusts and duties of an Administrator with respect to the Capital Securities and the Trust, as if he/she were an original signatory in the capacity as Administrator (and not in an individual capacity) to the Amended and Restated
Trust Agreement. This Appointment is executed and delivered by the retiring Administrators, the successor Administrators and the Common Securityholder pursuant to Section 4.3(d) of the Amended and Restated Trust Agreement.
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| | 4. | All provisions of the Amended and Restated Trust Agreement shall remain unaffected by the foregoing amendment and shall remain in full force and effect.
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| | 5. | This Appointment shall become a legally effective and binding instrument as of the date hereof.
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| | 6. | This Appointment may be executed in any number of counterparts, each of which so executed shall be deemed to be an original, but all of such counterparts shall together constitute
one and the same instrument.
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IN WITNESS WHEREOF, the undersigned have executed this Appointment as of the day and year first
above written.



PLACER SIERRA BANCSHARESBy:

/s/ David E. HoostonDavid E. HoostonChief Financial OfficerU.S. BANK NATIONAL ASSOCIATION, AS INSTITUTIONAL TRUSTEEBy:

/s/ David E. HoostonDavid E, HoostonChief Financial Officer/s/ Frank J. MerardanteFrank J. Mercardante, as successor Administrator/s/ Randall E. ReynosoRandall E. Reynoso, as successor Administrator/s/ James A. SundquistJames A. Sundquist, as removed Administrator/s/ Angelee J. HarrisAngelee J. Harris, as removed Administrator