CAT1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.6HG0545480 (symbol CAT1, also known as Cat2, HvCAT1, ROG1, and SEN2) on barley chromosome 6H encodes a catalase enzyme (EC 1.11.1.6) with additional annotated molecular functions including S-nitrosylase, histone acetyltransferase, and protein kinase activities. The protein localises to the peroxisomal lumen, chloroplast envelope, tonoplast, and apoplast. In barley, CAT1 is associated with cold and osmotic stress tolerance. The gene is linked to diverse processes including cellular oxidant detoxification, hydrogen peroxide biosynthesis, cellular nitric oxide homeostasis, response to superoxide, regulation of ethylene signalling, and response to oomycetes. Associations with agronomic traits include grain filling period, seed yield, biomass yield, photosynthetic rate, leaf chlorosis, root thickness, nitrate uptake, and disease tolerance.