CYC1 — Arabidopsis thaliana

Summary

AT4G37490, also known as CYC1, CYCB1, or CYCB1;1, encodes a cyclin B1 protein in Arabidopsis thaliana. The product is a cyclin-dependent protein serine/threonine kinase regulator and has been associated with histone acetylase, SUMO transferase, and protein kinase activities. CYC1 is associated with male germ cell division, root meristem proliferation, and root growth. The gene has been connected to numerous traits including biomass yield, shoot fresh weight, water use efficiency, germination rate, seed viability, stamen number, leaf trichome density, and responses to auxin, cytokinin, and brassinosteroids. It is also associated with biotic stress responses, insect damage, and geminivirus resistance. The protein localizes to the nucleus, cytoplasm, preprophase band, and stress granules. Studies of related cyclin B1 genes in other species link the family to male gametophyte development, embryo development, and microtubule organization.