Lhca5 interaction with plant photosystem I
Copyright policy )Lhca5 interaction with plant photosystem I
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.
Photosystem I, Models, Molecular, Photosystem I Protein Complex, Arabidopsis Proteins, Arabidopsis, Light-Harvesting Protein Complexes, Pisum sativum, Lhca5, Light-harvesting complex I, Cross-linking
Photosystem I, Models, Molecular, Photosystem I Protein Complex, Arabidopsis Proteins, Arabidopsis, Light-Harvesting Protein Complexes, Pisum sativum, Lhca5, Light-harvesting complex I, Cross-linking
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