PBS2 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.2HG0189710, designated PBS2 (also known as RAR1), encodes a CHORD domain-containing protein on barley chromosome 2H. The product exhibits protease, Hsp90, small GTPase, and chaperone protein binding activities, along with ATP hydrolase, protein homodimerization, mRNA, metal, zinc, and ATP binding. It is associated with immune and defence responses, including respiratory burst, virus response, and regulation of defence to fungi, as well as stomatal closure, de-etiolation, chloroplast stroma protein import, RNA and protein breakdown, protein stabilization and folding, and response to chlorate, arsenic, and auxin. The protein localizes to the SCF complex, stress granule, chloroplast envelope, apoplast, nucleolus, cell wall, stroma, vacuole, and Golgi. PBS2 is linked to powdery mildew resistance, stem rust, leaf variegation, chloroplast development, flowering time, senescence, and responses to temperature, light, salt, cadmium, and gibberellic acid.