A truncated mutant of the extrinsic 23-kDa protein that absolutely requires the extrinsic 17-kDa protein for Ca2+ retention in photosystem II

被引：33

作者：

Ifuku, K ^{[1
]}

Sato, F ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Biostudies, Div Integrated Life Sci, Sakyo Ku, Kyoto 6068502, Japan

来源：

PLANT AND CELL PHYSIOLOGY | 2002年 / 43卷 / 10期

关键词：

Ca2+ retention; extrinsic 23-kDa protein; extrinsic 17-kDa protein; oxygen-evolving complex; photosystem II;

D O I：

10.1093/pcp/pcf136

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

One function of the extrinsic 23-kDa protein in photosystem II (OEC23) is to retain Ca2+ and CI-, two essential cofactors for photosynthetic oxygen evolution. A truncated mutant of OEC23 (OEC23 Delta19) revealed that 19 residues of the N-terminus of OEC23 were necessary for Ca2+ retention but not for its proper interaction with OEC17, the extrinsic 17-kDa protein in photosystem II. The lost ability of OEC23 Delta19 to reconstitute the oxygen-evolving activity was partially restored by OEC17 binding, suggesting the involvement of OEC17 in Ca2+ retention in photosystem II.

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页码：1244 / 1249

页数：6

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