The PsbP and PsbQ family proteins in the photosynthetic machinery of chloroplasts.
The PsbP and PsbQ proteins are extrinsic subunits of the photosystem II in eukaryotic photosynthetic organisms including higher plants, green algae and euglena. It has been suggested that PsbP and PsbQ have evolved from their cyanobacterial homologs, while considerable genetic and functional modifications have occurred to generate the eukaryote-type proteins. In addition, number of PsbP and PsbQ homologs exist in the thylakoid lumen of chloroplasts. These homologs are nuclear-encoded and likely diverged by gene duplication, and recent studies have elucidated their various functions in the photosynthetic machinery. In this short review, recent findings and new idea about these components will be discussed.
Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan; Japan Science and Technology Agency, PRESTO, 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan. Electronic address: ifuku@kais.kyoto-u.ac.jp.
Kentaro
K
Ifuku
D000460:Chlorophyta / Q000378:metabolism*; D002736:Chloroplasts / Q000378:metabolism*; D005055:Euglena / Q000378:metabolism*; D010100:Oxygen / Q000378:metabolism*; D045332:Photosystem II Protein Complex / Q000378:metabolism*; D010944:Plants / Q000378:metabolism*; D021122:Protein Subunits; D020524:Thylakoids / Q000378:metabolism
D045332:Photosystem II Protein Complex; D021122:Protein Subunits; D010100:Oxygen
Extrinsic proteins; Molecular evolution; Oxygen-evolving complex; Photosystem II; PsbP; PsbQ