HSP83 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.2HG0099870 (HSP83, HvHSP83) on barley chromosome 2H encodes a heat shock protein 90 family chaperone with ATP hydrolase, ATP-dependent protein folding chaperone, DNA polymerase, transcription regulator, protein kinase, and cis-trans proline isomerase activities, and binds phosphatidylinositol phosphates, chaperone proteins, and DNA. It is associated with cellular thermotolerance, the unfolded protein response, UV protection, base-excision repair, non-homologous end joining, nucleotide excision repair, brassinosteroid and gibberellin signalling, root hair differentiation, quiescent centre organization, and autophagy. The gene is linked to maturity time, reproductive growth, stem rust response, drought sensitivity, starch grain synthesis, chloroplast development, seed longevity, and heat, salt, osmotic, oxidative, and anoxia stress tolerance. Studies of related genes in other species connect the family to thermotolerance, drought memory, pathogen resistance, male fertility, and embryo development.