A common ancestor for oxygenic and anoxygenic photosynthetic systems: a comparison based on the structural model of photosystem I.
A common ancestor for oxygenic and anoxygenic photosynthetic systems: a comparison based on the structural model of photosystem I.
复制标题
含氧和缺氧光合系统的共同祖先:基于光系统 I 结构模型的比较。
DOI:
10.1006/jmbi.1998.1824
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发表时间:
1998
影响因子:
5.6
通讯作者:
Norbert Krauß
中科院分区:
文献类型:
--
作者:
Wolf;O. Klukas;Wolfram Saenger;H. T. Witt;Petra Fromme;Norbert Krauß
The 4 A structural model of photosystem I (PSI) has elucidated essential features of this protein complex. Inter alia, it demonstrates that the core proteins of PSI, PsaA and PsaB each consist of an N-terminal antenna-binding domain, and a C-terminal reaction center (RC)-domain. A comparison of the RC-domain of PSI and the photosynthetic RC of purple bacteria (PbRC), reveals significantly analogous structures. This provides the structural support for the hypothesis that the two RC-types (I and II) share a common evolutionary origin. Apart from a similar set of constituent cofactors of the electron transfer system, the analogous features include a comparable cofactor arrangement and a corresponding secondary structure motif of the RC-cores. Despite these analogies, significant differences are evident, particularly as regards the distances between and the orientation of individual cofactors, and the length and orientation of alpha-helices. Inferred roles of conserved amino acids are discussed for PSI, photosystem II (PSII), photosystem C (PSC, green sulfur bacteria) and photosystem H (PSH, heliobacteria). Significant sequence homology between the N-terminal, antenna-binding domains of the core proteins of type-I RCs, PsaA, PsaB, PscA and PshA (of PSI, PSC and PSH respectively) with the antenna-binding subunits CP43 and CP47 of PSII indicate that PSII has a modular structure comparable to that of PSI.
影响因子:
2.9
作者:
CHANG, CH;ELKABBANI, O;SCHIFFER, M
通讯作者:
SCHIFFER, M
DOI:
10.1021/bi961765f
发表时间:
1996
期刊:
Biochemistry.
影响因子:
--
作者:
Mac,M;Tang,XS;Diner,BA;McCracken,J;Babcock,GT
通讯作者:
Babcock,GT