SUT1 — Sorghum bicolor

Summary

SORBI_3001G488700 (SbSUT1) on sorghum chromosome 1 encodes a protein belonging to the sucrose symporter plant family and the major facilitator superfamily. The gene product exhibits salicin transmembrane transporter activity, maltose:proton symporter activity, arbutin transmembrane transporter activity, and sucrose:proton symporter activity. SbSUT1 is associated with phloem unloading, maltose transport, phloem loading, sucrose transport, sucrose metabolism, NO storage, and pollen germination. The protein localizes to the cis-Golgi network, tonoplast, vacuole, membrane, and plasmalemma. Associations with grain filling period and photosynthetic rate have been noted. Related genes in other species link the family to grain filling, starch biosynthesis, salt tolerance, photosynthesis, and seed development.