ALB1 — Brassica oleracea

Summary

BoALB1 (BOLC102_C05P006680.1) on cabbage chromosome 5 encodes a magnesium chelatase ATPase subunit, a component of the magnesium chelatase complex that catalyses the first committed step of chlorophyll biosynthesis. The product contains AAA+ ATPase, VWA, and BchD/ChlD domains and localises to the chloroplast stroma and thylakoid. In cabbage, BoALB1 is associated with chlorophyll a anabolism, chlorophyll metabolism, chlorophyll breakdown, anthocyanin anabolism, chlorophyll fluorescence, and virus-induced post-transcriptional gene silencing. The gene has been linked to net photosynthetic rate, photosynthetic rate, chlorophyll content, and photochemical quenching. Related genes in other species connect the family to chlorophyll biosynthesis and lethal cream-coloured or white embryo and seedling phenotypes. Sequence similarity also links the family to leaf colour, phyllotaxy, transpiration rate, and stomatal resistance traits.