Mechanism of Protein Transport across the Chloroplast Envelope
نویسندگان
چکیده
منابع مشابه
Mechanism of Protein Transport across the Chloroplast Envelope.
Photosynthetic eukaryotes have evolved an elaborate system of nuclear-chloroplast interdependence to ensure the coordinate regulation of photosynthesis and other cellular processes. One of the most dramatic consequences of the evolution of the chloroplast from original prokaryotic endosymbiont to a cellular organelle has been the transfer of the vast majority of genes encoding chloroplast polyp...
متن کاملMechanism of protein import across the chloroplast envelope.
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 chloroplast envelope. Protein import into the chloroplast consists of two essential elements: the specific recognitio...
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The initial rate of Fe(2+) movement across the inner envelope membrane of pea (Pisum sativum) chloroplasts was directly measured by stopped-flow spectrofluorometry using membrane vesicles loaded with the Fe(2+)-sensitive fluorophore, Phen Green SK. The rate of Fe(2+) transport was rapid, coming to equilibrium within 3s. The maximal rate and concentration dependence of Fe(2+) transport in predom...
متن کاملThe mechanism of inactivation of a 50-pS envelope anion channel during chloroplast protein import.
The mechanism of import-competent precursor protein-induced inactivation of a 50-pS anion channel of the chloroplast envelope is investigated using single-channel recordings. The inactivation by precursor protein is the result of the induction of a long-lived closed state of the channel. The mean duration of this state does not depend on precursor concentration. From this it can be concluded th...
متن کاملTic21 is an essential translocon component for protein translocation across the chloroplast inner envelope membrane.
An Arabidopsis thaliana mutant defective in chloroplast protein import was isolated and the mutant locus, cia5, identified by map-based cloning. CIA5 is a 21-kD integral membrane protein in the chloroplast inner envelope membrane with four predicted transmembrane domains, similar to another potential chloroplast inner membrane protein-conducting channel, At Tic20, and the mitochondrial inner me...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1997
ISSN: 1532-2548,0032-0889
DOI: 10.1104/pp.114.2.405