H2B — Brassica oleracea var. botrytis

Summary

BoH2B (BOLND125_C09P057590.1) encodes a histone H2B family protein on cauliflower chromosome 9, containing the conserved histone-fold domain and H2A/H2B/H3 structural motif. The product is annotated with histone acetylase and deacetylase activities, PRMT activity, DNA binding, protein heterodimerization, and structural constituent of chromatin functions, and localises to chromatin, the nucleolus, centromere complex, and plastid. BoH2B is associated with nucleosome assembly, meiotic chromosome separation, mitochondrial distribution, regulation of shoot apical meristem and embryonic development, mucilage extrusion from seed coat, and responses to biotic stimuli, osmotic stress, and silver ion. The gene has been connected to numerous agronomic traits including days to flowering, inflorescence and flower development, leaf trichome density, root development, seed growth, anthocyanin content, and responses to high and low temperature, aluminium, and insect damage. Studies in related genes in other species link the H2B family to centromere organisation, haploid production, chromatin structure, disease resistance, and salt stress response.