COP9 — Brassica oleracea var. botrytis

Summary

BoCOP9, encoded by the cauliflower gene BOLND125_C04P045070.1_BOLND125_V1 on chromosome 4, is a component of the COP9 signalosome complex (CSN8 subunit) and contains a PCI domain. The gene product is associated with transcription factor binding, metalloendopeptidase activity, translation initiation factor activity, and ubiquitin-protein transferase activity. BoCOP9 is linked to the regulation of photomorphogenesis, floral organ identity specification, endosperm development, and responses to red/far-red light, glucose, sucrose, and maltose. It is associated with yield, flowering time, seed development, root morphology, anthocyanin content, and responses to UV light, high temperature, and osmotic stress. The protein localizes to the nucleus, cytosol, CSN complex, and ubiquitin ligase complex, and is linked to protein deneddylation, SCF-dependent proteasomal degradation, and epigenetic regulation of gene expression.