SUT — Nicotiana attenuata

Summary

A4A49_33129 (SUT) in Nicotiana attenuata encodes a protein belonging to the SUT_2 family and the major facilitator superfamily, with annotated molecular functions including sucrose:proton symporter activity, maltose:proton symporter activity, and arbutin, salicin, and biotin transmembrane transporter activities. The gene is associated with phloem sucrose loading, maltose transport, and carbohydrate membrane transport, as well as cell cycle phases, nuclear division, and microtubule-based movement. It localizes to the tonoplast, chloroplast outer membrane, cis-Golgi network, and pollen tube. SUT is linked to agronomically relevant traits including grain yield, unfilled grain number, sucrose and sugar content, photosynthetic rate, root dry weight, leaf chlorosis, days to flowering, seed dormancy, jasmonic acid content, and stress responses. Studies of related genes in other species connect the family to phloem transport, carbon partitioning, grain size, yield, tuberization, flowering time, and shade avoidance.