Co-evolution of cytochrome c(6) and plastocyanin, mobile proteins transferring electrons from cytochrome b(6)f to photosystem I

被引:71
作者
Navarro, JA
Hervas, M
DelaRosa, MA
机构
[1] UNIV SEVILLA, INST BIOQUIM VEGETAL & FOTOSINTESIS, E-41080 SEVILLE, SPAIN
[2] CSIC, E-41080 SEVILLE, SPAIN
来源
JOURNAL OF BIOLOGICAL INORGANIC CHEMISTRY | 1997年 / 2卷 / 01期
关键词
cytochrome c(6); electron transfer; molecular recognition; photosystem I; plastocyanin;
D O I
10.1007/s007750050101
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Cytochrome c(6) and plastocyanin are soluble metalloproteins that act as mobile carriers transferring electrons between the two membrane-embedded photosynthetic complexes cytochrome b(6)S and photosystem I (PSI). First, an account of recent data on structural and functional features of these two membrane complexes is presented. Afterwards, attention is focused on the mobile heme and copper proteins - and, in particular, on the structural factors that allow recognition and confer molecular specificity and control the rates of electron transfer from and to the membrane complexes. The interesting question of why plastocyanin has been chosen over the ancient heme protein is discussed to place emphasis on the evolutionary aspects. In fact, cytochrome Ch and plastocyanin are presented herein as an excellent case study of biological evolution, which is not only convergent (two different structures but the same physiological function), but also parallel (two proteins adapting themselves to vary accordingly to each other within the same organism).
引用
收藏
页码:11 / 22
页数:12
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