CAT — Capsicum annuum

Summary

CaCAT2 (T459_31096) on pepper chromosome 12 encodes a catalase enzyme (EC 1.11.1.6) with catalase activity, heme binding, and metal binding functions, localizing to the peroxisomal lumen, cytosol, and nucleus. It is associated with hydrogen peroxide metabolism, the ascorbate-glutathione cycle, oxidative phosphorylation, protein oxidation, and S-nitrosylation. The gene is linked to numerous agronomically relevant traits including chilling stress response and chilling injury tolerance, salt response, net photosynthetic rate, transpiration rate, water use efficiency, relative chlorophyll content, cell membrane stability, fruit length, pungency, carotenoid content, flavonoid content, lignin content, sugar content, amino acid content, proline content, nitrogen content, root and shoot fresh and dry weights, leaf dry weight, stem thickness and diameter, plant dry weight, heterosis, and cytoplasmic male sterility. Studies of related genes in other species connect the family to antioxidant activity, oxidative stress response, and salt stress tolerance.