BBX2 — Brassica napus

Summary

BnBBX2 (also known as BBX2, COL1, or ATCOL1) on chromosome A10 of oilseed rape encodes a CONSTANS-like protein containing B-box and CCT domains, with DNA-binding transcription factor activity and metallopeptidase activity. The gene is associated with photoperiod-sensitive flowering time, including responses to long-day and short-day conditions, as well as flower formation and the vegetative-to-reproductive phase transition. It has been linked to multiple agronomic traits such as seedling hypocotyl length, leaf trichome density, root morphology, iron concentration, gibberellic acid sensitivity, jasmonic acid content, stomatal opening, leaf senescence, and salt tolerance. The product localizes to the nucleus, cytosol, and ubiquitin ligase complex, and is associated with COP9 signalosome assembly, protein deneddylation, and SCF complex formation. Related genes in other species are linked to photoperiodic flowering time control, trichome development, and cell cycle progression.