SUS1 — Solanum tuberosum

Summary

PGSC0003DMG400002895, the potato SUS1 gene on chromosome 12, encodes a sucrose synthase enzyme (EC 2.4.1.13) with sucrose synthase activity, also annotated for DNA binding and transcription factor activity. In potato, SUS1 is associated with sucrose metabolism, phloem unloading, and the regulation of photosynthesis, as well as responses to flooding, nitrate starvation, and osmotic stress. It localises to the cytosol, nucleus, vacuole, and plasmodesmata. The gene is associated with starch and sucrose content, grain yield, fruit quality, photosynthetic rate, and stress responses including hypoxia tolerance and cold tolerance. Related genes in other species are linked to carbon allocation, cellulose and starch biosynthesis, and traits such as grain yield, fruit size, drought tolerance, and chilling tolerance.