XA21 — Oryza sativa Japonica

Summary

OS06G0587200, designated XA21 in rice (Oryza sativa Japonica) on chromosome 6, encodes a transmembrane receptor serine/threonine kinase with leucine-rich repeat domains and protein kinase activity. The gene product exhibits steroid binding, SNARE binding, signaling receptor activity, and protein heterodimerization activity, and is classified as EC 2.7.11.1. XA21 is associated with activation of defense response to bacteria, upregulation of defense response, defense response to fungi, brassinosteroid-mediated signaling, detection of brassinosteroid stimulus, hormone-mediated signaling, response to other organisms, response to light stimulus, skotomorphogenesis, seedling development, post-embryonic development, megasporogenesis, microsporogenesis, anther wall tapetum development, microtubule bundling, chlorophyll fluorescence, protein autophosphorylation, and protein phosphorylation. It localizes to the plasma membrane, ER membrane, perinuclear ER membrane, cortical ER, endosome, nucleus, and extracellular region. The gene is also linked to chlorophyll content and quantum yield traits. Studies of related genes in other species connect this receptor kinase family to immune signaling.