Lucinski R, Schmid VHR, Jansson S, Klimmek F
Lhca5 interaction with plant photosystem I
FEBS Letters: 2006 580:6485-6488
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 Lhea1/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. (c) 2006 Federation of European Biochemical Societies.
Published by Elsevier B.V. All rights reserved.
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