CAB1 — Capsicum annuum

Summary

CaCAB1 (T459_20683) on pepper chromosome 7 encodes a chlorophyll a-b binding protein. The gene product is associated with xanthophyll binding, chlorophyll binding, pheophytinase activity, and chlorophyll b reductase activity, and is localized to the thylakoid membrane, photosystem II, and the light-harvesting complex II. CaCAB1 is associated with photosynthesis, light harvesting in both photosystems, chlorophyll anabolism and breakdown, and responses to low light, desiccation, and herbicide. It is linked to fruit color, chlorophyll content, net photosynthetic rate, leaf yellowing tolerance, bacterial blight disease resistance, and heat and cold stress responses. Related genes in other species link the family to cold acclimatization of photosynthesis, light adaptation, and photosystem antenna composition.