Robinson, Colin, Woolhead, Cheryl A. and Edwards, W. (2000) Transport of proteins into and across the thylakoid membrane. In: Genetic Manipulation of Photosynthesis Session at the Annual Meeting of the Society-for-Experimental-Biology, Heriot Watt Univ, Edinburgh, Scotland, Mar 22-24, 1999. Published in: Journal of Experimental Botany, Vol.51 (Sp. Iss. SI). pp. 369-374.

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Abstract

The biogenesis of thylakoid proteins is a complex issue that requires the operation of at least four pathways within the chloroplast. Two of the pathways are used for soluble lumenal proteins, where the proteins bear cleavable targeting signals that are recognized by one of two distinct translocases. These pathways differ in fundamental respects. A subset of lumenal proteins are transported in an unfolded state by a typical Sec system, whereas others are transported by a novel class of translocase that appears to function primarily in the transport of fully-folded proteins. Related protein translocases have now been shown to operate in a wide variety of bacterial species, suggesting a wide spread requirement for the translocation of folded proteins across biological membranes, Numerous integral membrane proteins are also targeted into the thylakoid membrane, and these too follow at least two distinct routes. Some proteins use a signal recognition some proteins would be very toxic, even lethal, if active Some proteins use a signal recognition particle-dependent pathway that requires GTP and unidentified apparatus in the thylakoid membrane. Others, however, require none of the known targeting factors and may insert spontaneously into the membrane. In this article, the rationale behind this pathway complexity is discussed in relation to the properties of the substrate proteins and the evolutionary origins of the chloroplast.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	S Agriculture > SB Plant culture
Divisions:	Faculty of Science > Life Sciences (2010- )
Journal or Publication Title:	Journal of Experimental Botany
Publisher:	OUP
ISSN:	0022-0957
Date:	February 2000
Volume:	Vol.51
Number:	Sp. Iss. SI
Number of Pages:	6
Page Range:	pp. 369-374
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Title of Event:	Genetic Manipulation of Photosynthesis Session at the Annual Meeting of the Society-for-Experimental-Biology
Type of Event:	Conference
Location of Event:	Heriot Watt Univ, Edinburgh, Scotland
Date(s) of Event:	Mar 22-24, 1999
URI:	http://wrap.warwick.ac.uk/id/eprint/13684

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