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Molecular functions of PsbP and PsbQ proteins in the photosystem II supercomplex

Paper ID Volume ID Publish Year Pages File Format Full-Text
29622 44425 2011 7 PDF Available
Title
Molecular functions of PsbP and PsbQ proteins in the photosystem II supercomplex
Abstract

The PsbP and PsbQ proteins are extrinsic subunits of the photosystem II (PSII) supercomplex, which are found in green plants including higher plants and green algae. These proteins are thought to have evolved from their cyanobacterial homologs; cyanoP and cyanoQ respectively. It has been suggested that the functions of PsbP and PsbQ have largely changed from those of cyanoP and cyanoQ. In addition, multiple isoforms and homologs of PsbP and PsbQ were found in green plants, indicating that the acquisition of PsbP and PsbQ in PSII is not a direct path but a result of intensive functional divergence during evolution from cyanobacterial endosymbiont to chloroplast. In this review, we highlight newly introduced topics related to the functions and structures of both PsbP and PsbQ proteins. The present data suggest that PsbP together with PsbQ have specific and important roles in coordinating the activity of the donor and acceptor sides of PSII and stabilizing the active form of the PSII-light-harvesting complex II (LHCII) supercomplex.

► We overviewed new topics about the functions of the PsbP and PsbQ proteins in PSII. ► We suggest that PsbP and PsbQ stabilize the activity of the PSII-LHCII supercomplex. ► Localizations of PsbP and PsbQ in the PSII-LHCII supercomplex are discussed.

Keywords
Extrinsic proteins; Molecular evolution; Oxygen-evolving complex; Photosystem II; PsbP; PsbQ
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Molecular functions of PsbP and PsbQ proteins in the photosystem II supercomplex
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 104, Issues 1–2, July–August 2011, Pages 158–164
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us