CAT1 — Zea mays

Summary

ZmCAT1 (also known as CAT3, CAT2, CATA1, CATB, and SEN2) on maize chromosome 5 encodes a catalase enzyme (EC 1.11.1.6) with additional annotated molecular functions including S-nitrosylase, nucleoside diphosphate kinase, and histone acetyltransferase activities. The protein localizes to the peroxisomal lumen and is associated with diverse biological processes such as cellular nitric oxide homeostasis, toxin metabolism, DHN-melanin biosynthesis, and regulation of photosynthesis. ZmCAT1 is associated with numerous agronomically important traits including seed yield, biomass yield, ear length, grain filling period, chilling stress response, salt response, net photosynthetic rate, leaf chlorophyll content, carotenoid content, and brittle endosperm. The gene is also associated with programmed cell death, drought tolerance, and disease resistance responses. Studies of related genes in other species connect the family to cold and osmotic stress tolerance, immunity, and peroxisomal function.