GCS1 — Oryza sativa Indica Group

Summary

BGIOSGA029407 (GCS1, also known as HAP2 or OiGCS1) on Indica rice chromosome 9 encodes a HAP2/GCS1 domain-containing protein with lipid-binding molecular function. The gene is associated with fusion of sperm to egg plasma membrane involved in single fertilization, fusion of sperm to egg plasma membrane involved in double fertilization forming a zygote and endosperm, double fertilization, pollen tube guidance, pollen sperm cell differentiation, protein-membrane insertion, demethylation, diterpenoid anabolism, MAPK cascade, and NO storage. It localizes to cell projection membrane, cytoplasmic vesicle membrane, cytoplasmic vesicle, ER membrane, ER, extracellular space, and plasmalemma. Associations include grain size, width, length, weight, and yield, floury endosperm, amino acid content, shoot dry weight, cold tolerance, anthesis time, plant height, and starch, sugar, and sucrose phenotypes. Defective pollen tube targeting and fertilization, and gamete fusion phenotypes are also linked. Related genes in other species are associated with male gametophyte transmission defect and pollen tube guidance defects.