CAT3 — Arabidopsis thaliana

Summary

AT1G20620, also known as CAT3, CATALASE 3, SEN2, or ROG1 in Arabidopsis thaliana, 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 gene is associated with diverse biological processes such as cellular response to hydrogen peroxide, S-nitrosylation, peroxisome fission, aerenchyma formation, and pollen adhesion. CAT3 has been linked to numerous agronomically relevant traits including seed yield, biomass yield, photosynthetic rate, leaf senescence, germination rate, root length, plant height, and responses to abiotic stresses like cold, drought, and salinity. It is also associated with stomatal closure, hydrogen peroxide accumulation, oxidative stress tolerance, and circadian clock-regulated gene expression. Related genes in other species have been linked to traits such as leaf chlorophyll content, net photosynthetic rate, and seedling vigor.