HSP21 — Daucus carota subsp. sativus

Summary

DCAR_005736, symbol HSP21 and also known as DcHSP21, encodes a small heat shock protein (sHSP) belonging to the HSP20-like chaperone family with A-crystallin/Hsp20 domain. The gene product possesses unfolded protein binding activity (GO:0051082) and is localized to the cytosol and cytoplasm. In carrot, DcHSP21 is associated with responses to heat, hydrogen peroxide, hypoxia, salinity, and general stress, as well as protein folding, protein oligomerization, fermentation, homologous recombination, translation elongation, cell growth, and the HOG response. The gene has been connected to photosynthetic rate and to thermotolerance, heat tolerance, heat stress response, and embryogenesis. Related genes in other species link the family to salt and drought tolerance, acquired thermotolerance, high-temperature stress tolerance, seed longevity and maturation, fruit color, proline and sugar content, abscisic acid sensitivity, and root morphology.