HSP83 — Sorghum bicolor

Summary

SORBI_3006G005600, designated SbHSP83 on sorghum chromosome 6, encodes a member of the Hsp90 family of ATP-dependent protein folding chaperones, containing Hsp90_N, Hsp90_C and HATPase domains. The gene product is associated with ATP hydrolase activity, DNA polymerase activity, transcription regulator activity, and cis-trans proline isomerase activity, and localises to the chloroplast outer membrane, ER lumen, and perinuclear cytoplasm. SbHSP83 is associated with cellular thermotolerance, UV protection, base-excision repair, non-homologous end joining, cytokinin anabolism, root hair cell differentiation, and quiescent center organization. It has been associated with maturity time, photoperiod-sensitive flowering, reproductive growth time, starch grain synthesis, shoot axis branching, stamen length, pollen fertility restoration, and responses to brassinosteroid, gibberellin, auxin, ethylene, and high temperature stress. Related genes in other species link the family to thermotolerance, drought memory, male fertility, and disease resistance.