Lhca5 interaction with plant photosystem I

Robert Lucinski; Volkmar H R Schmid; Stefan Jansson; Frank Klimmek

doi:10.1016/j.febslet.2006.10.063

Lhca5 interaction with plant photosystem I

FEBS Lett. 2006 Nov 27;580(27):6485-8. doi: 10.1016/j.febslet.2006.10.063. Epub 2006 Nov 7.

Authors

Robert Lucinski¹, Volkmar H R Schmid, Stefan Jansson, Frank Klimmek

Affiliation

¹ Adam Mickiewicz University, Department of Plant Physiology, Institute of Experimental Biology, Al. Niepodleglosci 14, 61-713, Poznan, Poland.

PMID: 17107674
DOI: 10.1016/j.febslet.2006.10.063

Abstract

In the outer antenna (LHCI) of higher plant photosystem I (PSI) four abundantly expressed light-harvesting protein of photosystem I (Lhca)-type proteins are organized in two heterodimeric domains (Lhca1/Lhca4 and Lhca2/Lhca3). Our cross-linking studies on PSI-LHCI preparations from wildtype Arabidopsis and pea plants indicate an exclusive interaction of the rarely expressed Lhca5 light-harvesting protein with LHCI in the Lhca2/Lhca3-site. In PSI particles with an altered LHCI composition Lhca5 assembles in the Lhca1/Lhca4 site, partly as a homodimer. This flexibility indicates a binding-competitive model for the LHCI assembly in plants regulated by molecular interactions of the Lhca proteins with the PSI core.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Arabidopsis / genetics
Arabidopsis / metabolism*
Arabidopsis Proteins / genetics
Arabidopsis Proteins / metabolism*
Light-Harvesting Protein Complexes / genetics
Light-Harvesting Protein Complexes / metabolism*
Models, Molecular*
Photosystem I Protein Complex / genetics
Photosystem I Protein Complex / metabolism*
Pisum sativum / genetics
Pisum sativum / metabolism*

Substances

Arabidopsis Proteins
Lhca5 protein, Arabidopsis
Light-Harvesting Protein Complexes
Photosystem I Protein Complex