Mechanism of protein import across the chloroplast envelope

被引:25
作者
Chen, K [1 ]
Chen, X [1 ]
Schnell, DJ [1 ]
机构
[1] Rutgers State Univ, Dept Biol Sci, Newark, NJ 07102 USA
关键词
chloroplasts; envelope membranes; organelle biogenesis;
D O I
10.1042/0300-5127:0280485
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 development and maintenance of chloroplasts relies on the contribution of protein subunits from both plastid and nuclear genomes. Most chloroplast proteins are encoded by nuclear genes and are post-translationally imported into the organelle across the double membrane of the chloroprast envelope. Protein import into the chloroprast consists of two essential elements: the specific recognition of the targeting signals (transit sequences) of cytoplasmic preproteins by receptors at the outer envelope membrane and the subsequent translocation of preproteins simultaneously across the double membrane of the envelope. These processes are mediated via the co-ordinate action of protein translocon complexes in the outer (Toc apparatus) and inner (Tic apparatus) envelope membranes.
引用
收藏
页码:485 / 491
页数:7
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