PGIP — Beta vulgaris subsp. vulgaris

Summary

BVRB_4G088320, symbol PGIP, on sugar beet chromosome 4, encodes a polygalacturonase-inhibiting protein (PGIP) belonging to the leucine-rich repeat (LRR) family. The product exhibits enzyme inhibitor activity, receptor serine/threonine kinase binding, protein serine kinase activity, and ATP binding. It is associated with defense response, heat acclimation, signal transduction, cell differentiation, and regulation of cell growth. The gene is linked to floral development processes, including regulation of floral meristem size, specification of floral organ number, and gametophyte development. Localization evidence places the protein in the apoplast, membrane, and plasmalemma. Studies of related genes in other species connect the family to defense signaling and receptor kinase functions, though these associations are not yet established in sugar beet.