RB — Beta vulgaris subsp. vulgaris

Summary

BVRB_1G022190 (BvRB) encodes a retinoblastoma-related protein, a member of the RB family, with DNA-binding transcription activator activity, RNA polymerase II-specific transcription factor activity, protein dimerization activity, and CDK activity. In sugar beet, BvRB is associated with negative regulation of the G1/S cell cycle transition, cytokinesis, stem cell population maintenance, palisade mesophyll development, stomatal complex formation, heterochromatin organization, homologous chromosome pairing at meiosis, and epigenetic programming in the endosperm. It localizes to the microsporocyte and generative cell nuclei, chromatin, spindle, and the DP/Rb/MuvB complex. BvRB is linked to traits including leaf weight, root shape, specific leaf weight, net photosynthetic rate, flowering time, seed dormancy, and photoperiod sensitivity. Studies of related genes in other species connect the family to stem cell maintenance, organ size, cell cycle control, and drought stress response.