CAB1 — Capsicum annuum

Summary

CaCAB1 (T459_02059) on pepper chromosome 1 encodes a chlorophyll a-b binding protein. The protein contains a Chloro_AB-bd_pln domain and is annotated for chlorophyll binding and metal binding. It localises to the chloroplast thylakoid membrane and is associated with both photosystem I and II. CaCAB1 is linked to photosynthesis, light harvesting, pigmentation, and response to light stimulus. It is associated with chlorophyll anabolism and breakdown, phenylpropanoid and flavonoid metabolism, and virus-induced PTGS. Associations with fruit colour, chlorophyll content, quantum yield, net photosynthetic rate, and photosynthetic rate have been noted. Studies of related genes in other species further link the family to light harvesting.