ARA1 — Oryza sativa Indica Group

Summary

BGIOSGA023558 (symbol ARA1, also known as ISA1, CAP1, ARA2) on chromosome 6 of Indica rice encodes a GHMP-kinase family protein with L-arabinokinase and galactokinase activities, and binds ATP. The gene is associated with starch biosynthesis and metabolism, amylopectin anabolism, regulation of starch metabolism, galactose metabolism, seed development, protein phosphorylation, and NO storage. It is linked to anther and pollen development, grain traits, cell wall properties, vegetative growth, auxin sensitivity, lateral root development, arabinose metabolism and toxicity, carbon energy status signaling, and sugar signaling. The encoded protein localizes to the plasmodesma, cytosol, and cytoplasm. Studies of the Arabidopsis relative ISA1 link the family to starch synthesis, while related genes in other species are associated with grain weight, size, and appearance, amylose and starch content, seed weight, endosperm traits, pollen fertility, root morphology, and stripe rust disease response.