Subunit composition of CP43-less photosystem II complexes of Synechocystis sp. PCC 6803: implications for the assembly and repair of photosystem II.
Subunit composition of CP43-less photosystem II complexes of Synechocystis sp. PCC 6803: implications for the assembly and repair of photosystem II.
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CP43无光系统II的亚基组成,Synechocystis sp。 PCC 6803:对光系统II的组装和修复的影响。
DOI:
10.1098/rstb.2012.0066
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发表时间:
2012-12-19
期刊:
影响因子:
--
通讯作者:
Nixon PJ
中科院分区:
文献类型:
--
作者:
Boehm M;Yu J;Reisinger V;Beckova M;Eichacker LA;Schlodder E;Komenda J;Nixon PJ
Photosystem II (PSII) mutants are useful experimental tools to trap potential intermediates involved in the assembly of the oxygen-evolving PSII complex. Here, we focus on the subunit composition of the RC47 assembly complex that accumulates in a psbC null mutant of the cyanobacterium Synechocystis sp. PCC 6803 unable to make the CP43 apopolypeptide. By using native gel electrophoresis, we showed that RC47 is heterogeneous and mainly found as a monomer of 220 kDa. RC47 complexes co-purify with small Cab-like proteins (ScpC and/or ScpD) and with Psb28 and its homologue Psb28-2. Analysis of isolated His-tagged RC47 indicated the presence of D1, D2, the CP47 apopolypeptide, plus nine of the 13 low-molecular-mass (LMM) subunits found in the PSII holoenzyme, including PsbL, PsbM and PsbT, which lie at the interface between the two momomers in the dimeric holoenzyme. Not detected were the LMM subunits (PsbK, PsbZ, Psb30 and PsbJ) located in the vicinity of CP43 in the holoenzyme. The photochemical activity of isolated RC47-His complexes, including the rate of reduction of P680+, was similar to that of PSII complexes lacking the Mn4CaO5 cluster. The implications of our results for the assembly and repair of PSII in vivo are discussed.
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影响因子:
7.4
作者:
Dobakova, Marika;Sobotka, Roman;Komenda, Josef
通讯作者:
Komenda, Josef
影响因子:
16.8
作者:
Guskov, Albert;Kern, Jan;Saenger, Wolfram
通讯作者:
Saenger, Wolfram
DOI:
10.1016/0005-2728(88)90170-3
发表时间:
1988-03-09
期刊:
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子:
--
作者:
AKABORI, K;TSUKAMOTO, H;TOYOSHIMA, Y
通讯作者:
TOYOSHIMA, Y
影响因子:
2.9
作者:
Granvogl, Bernhard;Zoryan, Mikael;Eichacker, Lutz Andreas
通讯作者:
Eichacker, Lutz Andreas
影响因子:
7.4
作者:
Dobakova, Marika;Tichy, Martin;Komenda, Josef
通讯作者:
Komenda, Josef