HAP4 — Oryza sativa Indica Group

Summary

BGIOSGA030994 (HAP4, also known as UBQ13, ERD16, and RPL40A) on chromosome 9 of Indica rice encodes a protein containing both ubiquitin and ribosomal eL40 domains, with structural roles in the cytosolic ribosome and annotated molecular functions including histone methylase activity, thiol-dependent deubiquitinase activity, and ubiquitin-protein transferase activity. This gene is associated with seed morphogenesis, endosperm development, fruit development, seed dormancy, and regulation of abscisic acid anabolism. It has been linked to agronomically important traits including grain weight, grain yield, grain shape, salt tolerance, drought tolerance, temperature stress responses, flowering time, leaf senescence, root morphology, and disease tolerance. Studies of related genes in other species connect the family to cell proliferation, leaf architecture, fertility, and abscisic acid signaling.