The Cl− effect on photosynthetic oxygen evolution: interaction of Cl− with 18‐kDa, 24‐kDa and 33‐kDa proteins

FEBS Letters

Miyao, Mitsue¹  Murata, Norio¹ 

[1] Department of Biology, College of Arts and Sciences, University of Tokyo, Komaba, Meguro-ku, Tokyo 153, Japan

关键词: Cl− effect;    Oxygen evolution;    Photosystem II;    Photosynthesis;    (Spinach chloroplast);    Chl;    chlorophyll;    Mes;    4-morpholine-ethanesulphonic acid;    PS;    photosystem;   

DOI  :  10.1016/0014-5793(85)81091-7

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The interaction of Cl⁻ with the extrinsic proteins of 18 kDa, 24 kDa and 33 kDa in the photosynthetic oxygen-evolution complex was studied by comparing spinach photosystem II particles of different protein compositions. The 33-kDa protein decreased the Cl⁻ concentration optimum for oxygen evolution from 150 to 30 mM, and the 24-kDa protein decreased it from 30 to 10 mM. The 18-kDa protein did not change the optimum Cl⁻ concentration, but sustained oxygen evolution at Cl⁻ concentrations lower than 3 mM. The presence of the 24-kDa and 18-kDa proteins, but not each protein alone, markedly suppressed inactivation of oxygen evolution at a very low Cl⁻ concentration and its restoration by readdition of Cl⁻.

【 授权许可】

Unknown