FEATURES

FAMILY

light-harvesting chlorophyll a/b-binding (LHC) protein family

DESCRIPTION

Also known as LHCA5_ARATH, LHCA5. The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated (PubMed:15563470, PubMed:21806943). Seems involved in the function of the photosystem I in low light conditions, when other LHCA proteins are less abundant (PubMed:15356385). Required, together with LHCA6, for the formation of a full-size NAD(P)H dehydrogenase-photosystem I supercomplex (NDH-PSI) that triggers cyclic and chlororespiratory electron transport in chloroplast thylakoids, especially under stress conditions (e.g. increased light intensity) (Probable) (PubMed:19903870, PubMed:21278308). The LHC complex consists of chlorophyll a-b binding proteins (PubMed:19139095). Homodimer. Heterodimer with LHCA2 and, possibly, LHCA3 (PubMed:15356385, PubMed:17107674). Can substitute to LHCA4 to form a complex with LHCA1 (PubMed:21806943, PubMed:15563470). Binds pigments (PubMed:15563470). Element of the NAD(P)H dehydrogenase-photosystem I supercomplex (NDH-PSI) (PubMed:19903870).

EXTERNAL LINKS

LHCA5

Photosystem I chlorophyll a/b-binding protein 5, chloroplastic

LHCA5

Molecular Synopsis