HSP90 — Solanum lycopersicum

Summary

SOLYC06G036290.3, the tomato HSP90 gene on chromosome 6, encodes an ATP-dependent protein folding chaperone belonging to the heat shock protein 90 family. In tomato, this gene is associated with resistance to yellow leaf curl virus and whitefly, and is linked to responses to heat stress, wounding, and tomato chlorosis virus. It is associated with a wide range of biological processes including hydrogen peroxide metabolism, phosphatidylglycerol metabolism, autophagy in response to ER stress, the GABA shunt, and the ascorbate-glutathione cycle. Associations with agronomically important traits include drought tolerance, seed longevity, plant height, root number and length, chlorophyll and anthocyanin content, net photosynthetic rate, quantum yield, and cell membrane stability. The protein localises to the cytosol, ER lumen, and plasmalemma. Studies of related genes in other species identify the family as including GRP-94 and HSP81-3 homologs.