CCA1 — Arabidopsis thaliana

Summary

AT2G46830, known as CCA1 (CIRCADIAN CLOCK ASSOCIATED 1) in Arabidopsis thaliana, encodes a Myb/SANT domain-containing DNA-binding transcription factor with RNA polymerase II-specific activator activity, protein kinase regulator activity, and histone H3K9 acetyltransferase activity. CCA1 is associated with circadian clock temperature compensation, photoperiod-dependent flowering, light response, growth, and aphid resistance, as well as brassinosteroid breakdown, melatonin anabolism, and regulation of autophagy and signal transduction. It localizes to the nucleus, cytosol, nucleolus, and casein kinase II complex. The gene is linked to traits including stem number, leaf area, drought recovery, photoperiod sensitivity, heterosis, and cadmium concentration. Related genes in other species connect the family to circadian rhythms and flowering time.