COP1 — Pisum sativum

Summary

PSAT4G159720 (symbol COP1, also known as PsSPA1) on garden pea chromosome 4LG4 encodes a member of the SPA1/2/3/4 protein family containing WD40 repeats and a protein kinase domain, with molecular functions including phytochrome binding, red/far-red and blue light photoreceptor activity, FAD binding, and transcriptional co-regulator activity. The gene is associated with light detection, shade avoidance, far-red signaling, singlet oxygen-mediated programmed cell death, sucrose-mediated signaling, and responses to magnetism, strigolactone, and light intensity. It localizes to nuclear ubiquitin ligase complexes, chromatin, nuclear bodies, plastids, and the plasmalemma. Associations include fruit length, flower diameter, grain yield, leaf angle, photosynthetic ability, photoperiod sensitivity, temperature stress response, viral disease response, lignin biosynthesis, starch grain synthesis, phosphorus uptake, and glyphosate sensitivity. Related genes in other species link the family to UV-B photomorphogenesis, anthocyanin pigmentation, shade tolerance, and circadian period.