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Title

Protein Import in Chloroplasts: An Emerging Regulatory Role for Redox.

AuthorsBalsera, Mónica CSIC ORCID ; Soll, Jürgen; Buchanan, Bob B.
KeywordsChloroplasts
Protein import
Redox regulation
Biogenesis
Issue Date2009
PublisherElsevier
CitationAdvances in Botanical Research, Vol. 52, Pages 1-522 (2009)
AbstractChloroplasts as well as mitochondria are surrounded by two envelope membranes that contain protein machineries to ensure well-organized communication and substrate distribution between the organelle and the rest of the cell. Protein import into organelles must be tightly coordinated with the internal protein synthesis machinery to ensure assembly of functional complexes of dual genetic origin. Import must also be coupled to the cellular metabolic state to guarantee requirements of the organelle in response to developmental changes and environmental conditions. Several recently published findings point to a role for redox in regulating chloroplast protein import: light and cysteine-modifying reagents affect import, certain subunits of the protein import machinery contain redox-sensing components, and others are potential thioredoxin targets. Herein we review the recent structural, computational, genetic, and biochemical studies that have begun to identify key characteristics and properties underlying protein import in chloroplasts. The predicted topology of some components is discussed, pointing out conserved cysteines in the protein families that may play a role in linking redox to oxidative stress and changes in the metabolic state of chloroplasts.
Description55 p.
Publisher version (URL)http://dx.doi.org/10.1016/S0065-2296(09)52010-1
URI10261/35297
DOI10.1016/S0065-2296(09)52010-1
ISBN978-0-12-378622-7
Appears in Collections:(IRNASA) Libros y partes de libros

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