CAB1 — Capsicum annuum

Summary

CAB1 (CaCAB1) on pepper chromosome 2 encodes a chlorophyll a-b binding protein, a component of the light-harvesting complexes in chloroplast thylakoid membranes. The product binds chlorophyll and metal ions and is associated with photosynthesis, light harvesting in both photosystem I and II, and pigmentation. It is associated with upregulation of chlorophyll anabolism, chlorophyll breakdown, phenylpropanoid metabolism, flavonoid anabolism, virus-induced PTGS, and homeostasis. The gene is linked to fruit color, quantum yield, net photosynthetic rate, and chlorophyll content. Studies of related genes in other species further connect the family to light harvesting.