HEL — Brassica oleracea var. botrytis

Summary

BoHEL (HEL, PR4) on cauliflower chromosome 3 encodes a protein with a Barwin domain and PR4 family signature, annotated with RNA nuclease, chitin-binding, sugar-binding, hydrolase, transmembrane receptor serine/threonine kinase, and protein-binding activities. It is associated with defence responses to bacteria, fungi, viruses, and herbivores, as well as systemic acquired resistance, hypersensitive response cell death, immune response, and ethylene, auxin, and brassinosteroid signalling. The gene is linked to phloem transport, leaf vascular tissue pattern formation, and traits including leaf vein morphology, drought and salt tolerance, disease resistance, resistance to Botrytis cinerea, and abnormal leaf venation with reduced vein number. It localises to secretory vesicles, the extracellular region, and the plasma membrane. Related genes in other species connect the family to vascular development and leaf venation.