SHD — Solanum tuberosum

Summary

StSHD (PGSC0003DMG400019647) on potato chromosome 5 encodes a member of the heat shock protein 90 (Hsp90) family, characterized by Hsp90_N, Hsp90_fam, 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 anabolism. Associations extend to traits such as reducing sugar content, starch grain synthesis, plant fresh weight, root dry weight, submergence tolerance, bacterial and viral disease responses, floral organ morphology, and photoperiod-sensitive flowering time. Localization evidence connects the product to the chloroplast outer membrane, ER lumen, and cell periphery. Studies of related genes in other species link the family to thermotolerance, salinity tolerance, broad-spectrum disease resistance, and mitochondrial function.