SUS1 — Solanum tuberosum

Summary

PGSC0003DMG400013546 (StSUS1, SUS1) on potato chromosome 7 encodes a sucrose synthase enzyme (EC 2.4.1.13) with sucrose synthase activity, also annotated for DNA binding and transcription factor activity. The protein localises to the cytosol, nucleus, vacuole and plasmodesmata. StSUS1 is associated with sucrose metabolism, transport, phloem unloading, and both starch and sucrose anabolism and breakdown, as well as responses to water, flooding, nitrate starvation, sorbitol and mannitol. It has been linked to traits including total soluble sugar content, starch yield, grain yield, fruit quality, photoperiod sensitivity, carotenoid and anthocyanin content, photosynthetic rate, respiration rate, and responses to high and low temperature stress. The gene is also associated with hypoxia tolerance, sink strength, drought response, cold stress tolerance, and sugar homeostasis.