CAR1 — Brassica oleracea var. botrytis

Summary

BoCAR1, located on chromosome 3 of cauliflower (Brassica oleracea var. botrytis), encodes a protein with nucleotide-binding (NB-ARC), leucine-rich repeat (LRR), and RX-like CC domains, characteristic of plant disease resistance proteins. It binds ADP, ATP, and metal ions. The gene is associated with defense responses to other organisms, antiviral responses, and hypersensitive response programmed cell death (HR-PCD). Its product localizes to the plasmodesma, membrane, plasmalemma, and cytoplasm. BoCAR1 is linked to susceptibility to Pseudomonas syringae bacterial effectors, specifically HOPAA1. Studies of related genes in other species connect the family to climate-related traits such as temperature extremes and bioclimatic variables, though these associations are not established for cauliflower itself.