IRK — Sorghum bicolor

Summary

SORBI_3001G302800 (SbIRK) on sorghum chromosome 1 encodes a protein belonging to the POT (peptide transporter) family within the MFS superfamily, with annotated activities including transmembrane transport of N-methylnicotinate, nicotinate, nitrate, fructose, glucose, and zinc efflux, as well as UDP-glucose 4-epimerase and ubiquitin-like protein ligase activity. The gene is associated with diverse biological processes such as N-methylnicotinate transport, autophagy in response to ER stress, fructose and glucose transport, nitrogen utilization, zinc transport, root meristem specification, seed oilbody biogenesis, and trichome papilla formation. It is linked to traits including inflorescence and floral organ development, shoot elongation under submergence, seed protein content, oleic acid content, phosphorus and nitrate responses, iron sensitivity, brassinosteroid content, lignin biosynthesis, aphid response, photoperiod-sensitive flowering, and seed longevity. Localization evidence connects the product to the vacuolar membrane, Golgi, endosome, nuclear body, and mediator complex. Related genes in other species are linked to ER stress response, autophagy, and pathogen defence.