HSP70 — Asparagus officinalis

Summary

AoHSP70 (A4U43_C04F5130) on asparagus chromosome 4 encodes a member of the Hsp70 family of molecular chaperones, possessing ATP hydrolase activity, heat shock protein binding, and protein folding chaperone functions. It is associated with protein folding in the endoplasmic reticulum, the ERAD pathway, the unfolded protein response, and protein-chloroplast targeting. The gene is linked to thermotolerance, heat and osmotic stress tolerance, ROS scavenging, and salt stress tolerance. It has been connected to chloroplast development, pollen germination and development, leaf senescence, stomatal conductance and resistance, photosynthetic rate, seed growth and development, flowering time, and abscisic acid sensitivity. Localisation evidence places the product in the ER lumen, plastid stroma, thylakoid, and chloroplast envelope. Studies of related genes in other species link the Hsp70 family to ethylene perception, immune response, and chloroplast protein import.