XA4 — Oryza sativa Japonica

Summary

OsXA4 (also known as XA4, OsWAK123) on rice chromosome 11 encodes a transmembrane receptor protein kinase with serine/threonine kinase activity, calcium ion binding, polysaccharide and chitin binding, and ubiquitin ligase activity. It is associated with cell surface receptor signaling, innate immunity, defense responses to fungi, detection of symbiotic fungi and bacteria, positive regulation of the hypersensitive response, programmed cell death, reactive oxygen species anabolism, protein autophosphorylation and ubiquitination, nodulation, and rejection of self pollen. The gene has been linked to cold tolerance, chlorophyll content, blast disease resistance, and traits including sterility, dwarfism, panicle, root, anther, stem, and flower development. Related genes in other species connect the family to defense, cell wall function, and disease resistance.