HSP70 — Cucumis sativus

Summary

CsHSP70 (CSA_7G312930) on cucumber chromosome 7 encodes a member of the heat shock protein 70 (Hsp70) family, a chaperone with ATP hydrolase activity that binds ATP, heat shock proteins, and ethene, and is annotated with histidine kinase and SUMO transferase activities. The gene is associated with protein folding in the endoplasmic reticulum, the ERAD pathway, protein-chloroplast targeting, sumoylation, and downregulation of ethylene-mediated signaling. It is linked to leaf senescence, chlorophyll fluorescence, sucrose metabolism, and secondary metabolite biosynthesis. Associations include photosynthetic rate, stomatal resistance and opening, seed growth and development, flowering time, root morphology, stem elongation, leaf position, trichome morphology, and abscisic acid sensitivity. Phenotypic connections include thermotolerance, osmotic stress tolerance, chloroplast development, ROS scavenging, ethylene sensitivity, and growth recovery after ethylene removal. Studies of related genes in other species link the family to protein import into chloroplasts, seed germination, ethylene perception, and immune response.