HSP70 — Oryza sativa Indica Group

Summary

BGIOSGA017916 (symbol HSP70, preferred name OiCTHSP70-1) on Indica rice chromosome 5 encodes an ATP-dependent protein folding chaperone belonging to the Hsp70 family, with ATP hydrolase activity, ATP binding, and heat shock protein binding functions. This gene is associated with protein folding in the endoplasmic reticulum, the ERAD pathway, the unfolded protein response, auxin transport and signaling, amino acid membrane transport, and responses to heat, stress, and virus. It has been linked to heat tolerance, grain yield per plant, spikelet fertility, spikelet number, plant height, root length, leaf size, and relative root length. The encoded protein localizes to the ER lumen and chaperone complex, cytoplasm, nucleus, chloroplast membrane, tonoplast, and membrane. Studies of related genes in other species link the family to grain protein content, grain size and weight, starch content, carotenoid content, seed germination, and drought and salt tolerance.