DPE1 — Solanum tuberosum

Summary

PGSC0003DMG400016589, designated DPE1 (also known as StDPE1 or StDPEP) on potato chromosome 4, encodes a 4-alpha-glucanotransferase (EC 2.4.1.25) belonging to the glycoside hydrolase family 77, an enzyme that binds heteroglycans and starch. In potato, DPE1 is associated with starch accumulation, plant growth, and photosynthetic activity. The gene has been connected to maltose breakdown, glucose metabolism, polysaccharide breakdown, starch breakdown, starch anabolism, carbohydrate metabolism, fermentation, and response to cold. It is linked to traits including starch content, sucrose content, oligosaccharide content, chlorophyll content, and plant growth and development. The encoded protein localizes to the amyloplast and cytosol. Studies of related genes in other species link the DPE1 family to starch metabolism and altered starch degradation.