CAT1 — Arabidopsis thaliana

Summary

AT1G20630, designated CAT1 (catalase 1) in Arabidopsis thaliana, encodes a catalase enzyme (EC 1.11.1.6) that also exhibits nucleoside diphosphate kinase activity, enzyme activator activity, heme binding, and DNA-binding transcription factor activity. CAT1 is associated with cellular oxidant detoxification, response to hydrogen peroxide, photooxidative stress, paraquat, and heat dissipation, as well as the ascorbate-glutathione cycle, protein oxidation, and regulation of hydrogen peroxide metabolism. It is linked to hypersensitive cell death, mutagen resistance, and uranium stress response. The gene is associated with numerous traits including biomass yield, seed yield, root length and weight, chlorophyll content, leaf chlorosis, lignin content, stomatal resistance and closure, photochemical quenching, oxidative stress tolerance, disease tolerance, and responses to abiotic stresses such as low temperature and light intensity. CAT1 localises to peroxisomes, chloroplasts, mitochondria, and the apoplast.