The Rhodobacter sphaeroides PufX protein is not required for photosynthetic competence in the absence of a light harvesting system

FEBS Letters

Hunter, C.Neil¹  Jones, Michael R.¹  McGlynn, Peter¹ 

[1] Robert Hill Institute for Photosynthesis and Krebs Institute for Biomolecular Research, Department of Molecular Biology and Biotechnology, University of Sheffield, Western Bank, Sheffield, S10 2UH, UK

关键词: PufX;    Cyclic electron transfer;    Core complex;    Photosynthetic unit;    Rhodobacter sphaeroides;    Rb.;    Rhodobacter;    E.;    Escherichia;    RC;    reaction centre;    LH1;    light harvesting antenna 1;    LH2;    light harvesting antenna 2;    QA;    reaction centre primary acceptor quinone QB;    reaction centre secondary acceptor quinone;    Qz;    quinol oxidase site of the cytochrome bc 1 complex;    BLH1;    bacteriochlorophylls associated with the LH1 antenna;   

DOI  :  10.1016/0014-5793(94)00701-2

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The effects of deletion of the gene encoding the PufX protein from Rhodobacter sphaeroides have been examined using bacterial strains with simplified photosystems. We find that the PufX protein is required for photosynthetic growth in strains which have the LH1 antenna complex, but is not required in a reaction centre-only strain, suggesting that the PufX protein does not directly facilitate cyclic electron transfer between the reaction centre and the cytochrome bc ₁ complex. The influence of PufX and carotenoid type on the size of the reaction center/LH1 core complex has also been examined in these strains.

【 授权许可】

Unknown