R1 — Solanum tuberosum

Summary

PGSC0003DMG400007677 (symbol R1, also known as StGWD, GWD, StR1, or GWD1) on potato chromosome 5 encodes a phosphoglucan water dikinase (EC 2.7.9.4) with alpha-glucan water dikinase, starch-binding, histidine kinase, ATP-binding, and metal-binding activities. The gene is associated with starch metabolism, breakdown, anabolism, and regulation, as well as carbohydrate transport, sucrose metabolism, fermentation, the pentose-phosphate shunt, protein modification, targeting, and differential growth. It has been linked to numerous starch-related traits including amylopectin and amylose content, starch concentration, yield, grain shape, granule morphology, viscosity, mobilization, synthesis, phosphorylation, phosphate content, and freeze-thaw stability. Additional associations include reducing sugar and sucrose content, cold-induced sweetening, cold response, chlorophyll content, protein content, plant growth, and resistance to Phytophthora infestans (late blight).