AJH1 — Brassica oleracea var. botrytis

Summary

BoAJH1, encoded by the gene BOLND125_C05P023160.1 on cauliflower chromosome 5, is a metallopeptidase with deNEDDylase activity, belonging to the JAMM/MPN+ family and the COP9 signalosome. It is associated with protein deneddylation, COP9 signalosome assembly, and positive regulation of protein breakdown. The gene is linked to numerous traits including yield, photosynthetic rate, floral organ number, root system morphology, UV light sensitivity, photoperiod-sensitive flowering time, and hydrogen peroxide content. It is associated with ascorbate biosynthesis and its regulation, lipid homeostasis, response to iron ion starvation, and defense response to oomycetes. Localisation evidence places the product in the COP9 signalosome, nuclear ubiquitin ligase complexes, and the secondary cell wall. Studies of related genes in other species link the family to photomorphogenesis, flowering time, disease resistance, and cell cycle progression.