CAT1 — Oryza sativa Japonica

Summary

Rice CAT1 (Os02g0115700, also known as CATA1, CAT2, CAT3, OsCATB, OsROG1, OsSEN2) encodes a catalase (EC 1.11.1.6) with additional annotated molecular functions including S-nitrosylase, histone acetyltransferase, and nucleoside diphosphate kinase activities. The protein localises to the peroxisomal lumen and is associated with cellular nitric oxide homeostasis, hydrogen peroxide response, the ascorbate-glutathione cycle, and carbohydrate breakdown. CAT1 is associated with numerous agronomic traits including grain yield, seed yield, biomass, photosynthetic rate, heat tolerance, leaf chlorosis, rolled leaf morphology, chloroplast development, pollen fertility, nitrate uptake, auxin sensitivity, and jasmonic acid content. Studies of related genes in other species connect the family to stress response, disease resistance, programmed cell death, and peroxisomal function, and to cold and osmotic stress tolerance.