BI1 — Capsicum annuum

Summary

CaBI1 (T459_00713) on pepper chromosome 1 encodes a Bax inhibitor 1 protein, a member of the Bax inhibitor 1-related family. The gene product is associated with multiple molecular functions including protease binding, calcium channel activity, oxidoreductase activity, heme binding, and proton-transporting ATPase activity. CaBI1 is linked to diverse biological processes such as downregulation of programmed cell death, calcium signaling, response to UV and insects, nitrogen fixation, very-long-chain fatty acid metabolism, and regulation of photomorphogenesis. It localizes to the endoplasmic reticulum, vacuolar membrane, chloroplast envelope, nuclear envelope, and Golgi complex. The gene is associated with agronomically relevant traits including disease tolerance, water use efficiency, transpiration rate, root development, flowering time, and responses to high temperature, oxidative stress, and aluminum. Studies of related genes in other species link the family to cell death suppression, stress tolerance, and pollen development.