CBL4 — Arabidopsis thaliana

Summary

AT5G24270 (CBL4, also known as SOS3) encodes a calcineurin B-like calcium sensor protein in Arabidopsis thaliana. The gene product is annotated as a calcium ion sensor and exhibits calcium-dependent protein serine/threonine phosphatase activity, along with calcium ion binding and kinase binding capabilities. CBL4 is associated with salt tolerance, a phenotype directly observed for this gene. It is also linked to numerous biological processes including regulation of potassium transport, hypotonic salinity response, cellular response to potassium ion starvation, membrane depolarization, and response to flooding. The protein localizes to multiple cellular compartments including the tonoplast, endoplasmic reticulum, Golgi complex, endosome, and chloroplast envelope. CBL4 is associated with traits such as sodium and potassium content, cell membrane stability, leaf chlorophyll content, root fresh weight, shoot fresh weight, submergence tolerance, and water stress response.