SHD — Solanum tuberosum

Summary

StSHD (PGSC0003DMG400029787) on potato chromosome 12 encodes a heat shock protein 90 (Hsp90) family member, characterized by Hsp90_N, Hsp90_C, and HATPase_C domains, and annotated with ATP-dependent protein folding chaperone activity. In potato, StSHD is associated with temperature stress tolerance and PVY susceptibility. The gene is linked to diverse biological processes including cellular response to unfolded protein, double-strand break repair, vesicle organization, and negative regulation of cellulose biosynthesis. It has been connected to traits such as reducing sugar content, starch grain synthesis, floral organ morphology, plant fresh weight, root dry weight, submergence tolerance, and bacterial and viral disease responses. Localization evidence places the product at the chloroplast outer membrane, ER lumen, and plasma membrane periphery. Studies of related genes in other species link the Hsp90 family to thermotolerance, broad-spectrum disease resistance, salinity tolerance, and mitochondrial function.