PSAT6G156640 — Pisum sativum

Summary

PSAT6G156640 (HY8, PHYA) on chromosome 6LG2 encodes a phytochrome A photoreceptor, a member of the phytochrome A-E family that contains a phytochrome chromophore-binding domain, PAS and GAF domains, and a histidine kinase-like domain. The gene product exhibits photoreceptor activity, tetrapyrrole binding, and DNA-binding transcription activator activity. HY8 is associated with far-red light sensitivity, photoperiod sensitivity, the vegetative-to-reproductive phase transition, and light quality responses. It is linked to grain yield, seed set percent, fruit set, flower diameter, leaf angle, branch angle, and vegetative vigor. The gene is associated with phytochrome-mediated photoresponses, phytochrome A nuclear accumulation and import, heat shock tolerance, and photosynthesis-associated nuclear gene expression. It localizes to the nuclear envelope, nuclear body, and thylakoid, and participates in the conversion of active to inactive PHYA and its translocation from cytosol to nucleoplasm.