HSP18.2 — Brassica oleracea var. botrytis

Summary

BoHSP18.2 (HSP18.2) on cauliflower chromosome 2 encodes a small heat shock protein (sHSP) belonging to the HSP20-like chaperone family, with a Small_HSP domain and A-crystallin/Hsp20_dom. The product is associated with glycolipid binding, identical protein binding, protein binding, and chloroplast targeting sequence receptor activity. It is linked to protein folding, stabilization, and oligomerization, as well as protein-chloroplast targeting. The gene has been associated with responses to heat, cold, hydrogen peroxide, salinity, and bacterial defence, alongside heat acclimation, post-embryonic development, and the transition from vegetative to reproductive phase. Associations include chloroplast development, oxidative stress response, flowering time, disease tolerance, plant growth and development, and root morphology. The protein localises to the chloroplast outer membrane, cytoplasm, nucleus, and plasmalemma. Studies of related genes in other species link the family to heat shock response and protein translation efficiency.