RPG2 — Solanum tuberosum

Summary

PGSC0003DMG400004337 (RPG2, also known as StSWEET11, StSWEET12, and SWEET14) on potato chromosome 3 encodes a SWEET family protein with fructose uniporter, gibberellin transmembrane transporter, and sugar transporter activities. This gene is associated with sucrose transport and export, steroidal glycoalkaloid biosynthesis, and late blight resistance in potato. It is associated with carbohydrate and carboxylic acid transport, fructose export from vacuole to cytoplasm, gibberellic acid transport, seed growth and maturation, anther dehiscence, stomatal closure, responses to water, fructose, glucose, and sucrose, starch anabolism, lipid transport, cellular response to nitrogen starvation, and protein homooligomerization. The protein localizes to the tonoplast, ER, plasmalemma, trans-Golgi network, and vesicle membranes. Studies of related SWEET family members in other species link this gene family to phloem loading, seed filling, cold tolerance, and root microbiota colonization.