CP22 — Phaseolus vulgaris

Summary

PvCP22 (PHAVU_009G125100) on chromosome 9 of French bean encodes a chlorophyll a-b binding protein of the CP22/PsbS family, with molecular functions including chlorophyll, xanthophyll, and phosphoprotein binding, as well as serine-type endopeptidase activity. The gene is associated with photosystem II and thylakoid membrane localization, and with biological processes such as granum assembly, the xanthophyll cycle, thylakoid membrane organization, and responses to high light intensity, red and blue light, and fructose. It has been linked to photosynthetic rate, quantum yield, chlorophyll a and b content, carotenoid content, and light intensity response. Associations also include photoprotection, photosystem II repair and supercomplex stability, electron transport rate, growth under fluctuating light, and susceptibility to two-spotted spider mite. Related genes in other species are linked to non-photochemical quenching, high light stress tolerance, and defense against herbivores.