B-1 — Sorghum bicolor

Summary

SORBI_3006G003600 (symbol SbB-1) on sorghum chromosome 6 encodes a protein with multiple annotated molecular functions, including hexose, monosaccharide, carbohydrate and nitrate transmembrane transporter activities, as well as red/far-red light photoreceptor activity, phosphorelay sensor kinase activity, calcium-dependent protein serine/threonine kinase activity, protein phosphatase activity, and histidine kinase activity. The protein belongs to the MFS sugar transporter family. SbB-1 is associated with monosaccharide and nitrate transmembrane transport, sucrose anabolism, potassium ion import and homeostasis, basipetal auxin transport, abscisic acid metabolism, regulation of stomatal opening, circadian regulation of calcium ion oscillation, and acquisition of seed longevity. It is linked to numerous agronomic traits including photosynthetic ability, biomass yield, carotenoid content, photoperiod-sensitive flowering time, water stress response, leaf drying, root-to-shoot nitrate transport, salt tolerance, cadmium resistance, and seed longevity. The gene is localized to multiple cellular compartments including the tonoplast, endosome, Golgi, endoplasmic reticulum, and chloroplast stroma.