H4 — Beta vulgaris subsp. vulgaris

Summary

BvH4 (BVRB_3G068420) encodes a protein with a histone-fold domain and CENP-T/H4_C region, annotated with histone acetylase, deacetylase, methylase, and calmodulin-binding activities, as well as structural chromatin constituent and DNA-binding functions. In sugar beet, BvH4 is associated with nucleosome assembly, epigenetic regulation of gene expression, photoperiodism and flowering, vernalization response, seed maturation, secondary shoot formation, and responses to UV-B and hydrogen peroxide. It localizes to multiple cellular compartments including the nucleolus, thylakoid, chloroplast envelope, and plant-type vacuole. The gene is associated with traits such as flowering time, bacterial blight disease resistance, salt tolerance, chloroplast development, leaf morphology, root development, and responses to temperature stress and brassinosteroids. Studies of related genes in other species link the family to circadian rhythm, pre-mRNA splicing, and disease resistance.