NDLI: Function and evolution of channels and transporters in photosynthetic membranes

Content Provider	Springer Nature Link
Author	Pfeil, Bernard E. Schoefs, Beît Spetea, Cornelia
Copyright Year	2013
Abstract	Chloroplasts from land plants and algae originated from an endosymbiotic event, most likely involving an ancestral photoautotrophic prokaryote related to cyanobacteria. Both chloroplasts and cyanobacteria have thylakoid membranes, harboring pigment-protein complexes that perform the light-dependent reactions of oxygenic photosynthesis. The composition, function and regulation of these complexes have thus far been the major topics in thylakoid membrane research. For many decades, we have also accumulated biochemical and electrophysiological evidence for the existence of solute transthylakoid transport activities that affect photosynthesis. However, research dedicated to molecular identification of the responsible proteins has only recently emerged with the explosion of genomic information. Here we review the current knowledge about channels and transporters from the thylakoid membrane of Arabidopsis thaliana and of the cyanobacterium Synechocystis sp. PCC 6803. No homologues of these proteins have been characterized in algae, although similar sequences could be recognized in many of the available sequenced genomes. Based on phylogenetic analyses, we hypothesize a host origin for most of the so far identified Arabidopsis thylakoid channels and transporters. Additionally, the shift from a non-thylakoid to a thylakoid location appears to have occurred at different times for different transport proteins. We propose that closer control of and provision for the thylakoid by products of the host genome has been an ongoing process, rather than a one-step event. Some of the proteins recruited to serve in the thylakoid may have been the result of the increased specialization of its pigment-protein composition and organization in green plants.
Starting Page	979
Ending Page	998
Page Count	20
File Format	PDF
ISSN	1420682X
Journal	Cellular and Molecular Life Sciences
Volume Number	71
Issue Number	6
e-ISSN	14209071
Language	English
Publisher	Springer Basel
Publisher Date	2013-07-09
Publisher Place	Basel
Access Restriction	Subscribed
Subject Keyword	Channel Chloroplast Cyanobacteria Phylogeny Thylakoid membrane Transporter Cell Biology Biomedicine general Life Sciences Biochemistry
Content Type	Text
Resource Type	Article
Subject	Cell Biology Molecular Biology Molecular Medicine Pharmacology Cellular and Molecular Neuroscience

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