CAT2 — Arabidopsis thaliana

Summary

AT1G58030 (CAT2) in Arabidopsis thaliana encodes a cationic amino acid transporter with basic amino acid permease activity and transmembrane transporter activity, localised to the tonoplast, ER, nuclear envelope and plant-type vacuole. CAT2 is associated with vacuolar amino acid transport, hydrogen peroxide detoxification, and cellular amino acid homeostasis, as well as cell death, reactive oxygen species accumulation, and responses to abiotic stresses including high light, cadmium, and uranium. The gene is linked to leaf and stem senescence, stomatal closure and development, cold and drought tolerance, seed dormancy, circadian rhythm, and resistance to Colletotrichum higginsianum and biotrophic pathogens. Additional associations include amino acid, proline, auxin and jasmonic acid content, photosynthetic rate, root length and thickness, and disease tolerance. Studies of related genes in other species connect the family to chilling stress response, chlorophyll content and net photosynthetic rate.