CHLM — Brassica oleracea

Summary

BoCHLM (BOLC102_C07P059080.1) on cabbage chromosome 7 encodes a magnesium-protoporphyrin O-methyltransferase, a member of the Mg-protoporphyrin methyltransferase family with a SAM-dependent methyltransferase domain. The enzyme is associated with chlorophyll metabolism, including both chlorophyll biosynthesis and breakdown, and has been linked to anthocyanin biosynthesis, sumoylation, and nitric oxide storage. It localises to the chloroplast thylakoid membrane, envelope, cytosol, and nucleus. Associations include chlorophyll content and flowering time traits, as well as photosystem formation, viral resistance, heat stress response, and defense gene expression. Studies of related genes in other species connect the family to chlorophyll biosynthesis, photosynthesis-associated nuclear gene expression, stomatal aperture, ABA sensitivity, and drought tolerance.