集胞藻PCC 6803中质体醌池的氧化还原状态通过细胞色素b6f复合体调节状态转换。
The redox state of plastoquinone pool regulates state transitions via cytochrome b6f complex in Synechocystis sp. PCC 6803.
作者信息
Mao Hai Bin, Li Guo Fu, Ruan Xiang, Wu Qing Yu, Gong Yan Dao, Zhang Xiu Fang, Zhao Nan Ming
机构信息
State Key Laboratory of Biomembrane and Membrane Biotechnology, Department of Biological Sciences and Biotechnology, Tsinghua University, Beijing, PR China.
出版信息
FEBS Lett. 2002 May 22;519(1-3):82-6. doi: 10.1016/s0014-5793(02)02715-1.
The effects of benzoquinone analogues, phenyl-1,4-benzoquinone (PBQ) and 2,5-dibromo-3-methyl-6-isopropyl-1,4-benzoquinone (DBMIB), on state transitions in Synechocystis sp. PCC 6803 were investigated. PBQ induced a transition from state 2 to state 1 in the absence of actinic light whereas DBMIB caused a state 2 transition. 3-(3,4-Dichlorophenyl)-1,1-dimethyl urea could not eliminate the effects of PBQ and DBMIB. These results imply that the redox state of the plastoquinone pool controls the state transitions in vivo and cytochrome b6f complex is involved in this process. As a working hypothesis, we propose that the occupancy of the quinol oxidation site and the movement of the Rieske protein may be pivotal in this regulation.
研究了苯醌类似物苯基-1,4-苯醌（PBQ）和2,5-二溴-3-甲基-6-异丙基-1,4-苯醌（DBMIB）对集胞藻PCC 6803状态转换的影响。在没有光化光的情况下，PBQ诱导从状态2转变为状态1，而DBMIB导致状态2转变。3-(3,4-二氯苯基)-1,1-二甲基脲不能消除PBQ和DBMIB的影响。这些结果表明，质体醌库的氧化还原状态在体内控制状态转换，并且细胞色素b6f复合体参与了这一过程。作为一个工作假设，我们提出醌醇氧化位点的占据和 Rieske 蛋白的移动可能在这种调节中起关键作用。
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