Interaction of erogenous quinones with photosystem II in inside‐out thylakoids

FEBS Letters

Delrieu, Marie-José¹  Rosengard, Françoise¹ 

[1] CNRS, UPR 39 Biosystémes membranaires, Bat. 24, 1 Av. de la Terrasse, 91198 Gif-sur-Yvette Cedex, France

关键词: Oxygen evolution;    Photosystem II;    Chlorophyll fluorescence;    Quinone;    (Inside-out thylakoid);    PS;    photosystem;    PPBQ;    phenyl-p-benzoquinone;    DCBQ;    2;    5-dichloro-p-benzoquinone;    DMQ;    2;    5-dimethylbenzoquinone;    PQ;    plastoquinone;    QA (QB);    primary (secondary) quinone acceptor of PS II;   

DOI  :  10.1016/0014-5793(89)81447-4

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The presence of erogenous quinones PPBQ, DCBQ and DMQ in inside-out thylakoids alters the oscillation pattern with period 4 of the flash-induced fluorescence yield. The results can be interpreted by assuming that at ambient temperature PPBQ replaces PQ in 100% of the PS II centers detected by fluorescence, DMQ and DCBQ being bound to 40–60% of these centers only. The evaluation of the percentage of double hits in a 3 μs flash allows estimation of the electron-transfer rate from Q^- _A to Fe³⁺, which varies from 9 μs (PPBQ) to 20μs (DMQ).

【 授权许可】

Unknown