PHOTOSYSTEM-I REACTION-CENTER PROTEINS CONTAIN LEUCINE ZIPPER MOTIFS - A PROPOSED ROLE IN DIMER FORMATION

被引：39
|
作者：
WEBBER, AN [1 ]
MALKIN, R [1 ]
机构：
[1] UNIV CALIF BERKELEY,DEPT PLANT BIOL,BERKELEY,CA 94720
来源：
FEBS LETTERS | 1990年 / 264卷 / 01期
基金：
美国国家科学基金会;
关键词：
Iron-sulphur center; Leucine zipper; Photosystem I; Reaction center;
D O I：
10.1016/0014-5793(90)80749-9
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：
The photosystem I (PS I) reaction-centre polypeptides, encoded by the psaA and psaB genes, are shown to contain several highly conserved leucine repeats, consisting of a leucine residue every seventh amino acid, similar to the leucine zipper motifs known to mediate DNA-binding polypeptide dimerisation. In each of the PSI reaction-centre subunits the leucine zipper motif precedes highly conserved cysteine residues which have been proposed to ligate the interpolypeptide [4Fe-4S] centre, Fx. We propose that PS I reaction-centre dimerisation and [4Fe-4S] centre formation are mediated through the leucine zipper. © 1990.
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页码：1 / 4
页数：4
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