HAP4 — Oryza sativa Indica Group

Summary

BGIOSGA030996 (HAP4) on indica rice chromosome 9 encodes a protein with ubiquitin and ribosomal eL40 domains, annotated with histone methylase, deubiquitinase, ubiquitin ligase binding, and structural ribosomal constituent activities. It is associated with seed morphogenesis, dormancy, endosperm and fruit development, stomatal lineage progression, trichome branching, and responses to freezing and thermal stress. The gene is linked to grain weight, grain yield, grain shape, seed growth, leaf length, root mass density, shoot branching, stamen morphology, pollen fertility, chloroplast development, and stress responses including salinity and temperature extremes. It localizes to ribosomes, endosomes, and chromatin. Studies of related genes in other species connect the family to seed size, salt and drought tolerance, cell proliferation, and abscisic acid signaling.