CAT1 — Oryza sativa Japonica

Summary

OS06G0727200, also known as CAT1, CATB, or OsSEN2 on rice chromosome 6, encodes a catalase enzyme (EC 1.11.1.6) with additional annotated molecular functions including S-nitrosylase, histone acetyltransferase, and nucleoside diphosphate kinase activities. The protein localizes to the peroxisomal lumen and is associated with cellular oxidant detoxification, response to hydrogen peroxide and superoxide, the ascorbate-glutathione cycle, and regulation of heat response. This gene has been linked to numerous agronomically important traits including grain yield, seed shape, biomass yield, photosynthetic rate, heat tolerance, pollen fertility, and leaf chlorosis. It is also associated with programmed cell death, immunity, chloroplast biogenesis, and reactive oxygen species tolerance. Studies of related genes in other species link the family to stress response, disease resistance, and peroxisomal function.