ER — Arabidopsis thaliana

Summary

AT2G26330, known as ER (ERECTA), encodes a non-specific serine/threonine protein kinase belonging to the plant LRR-RLK family. The ER protein possesses transmembrane receptor protein kinase activity, serine/threonine kinase activity, and binds ATP, peptides, and signaling receptors. ER is associated with diverse biological processes including epidermal cell division, stomatal complex development and patterning, inflorescence and flower morphogenesis, carpel formation, and regulation of antifungal innate immune responses. The gene is linked to numerous agronomically relevant traits such as biomass yield, plant size, leaf area and thickness, seed set, water-use efficiency, transpiration efficiency, and biotic stress tolerance. ER localizes to the plasma membrane and extracellular regions. Studies of related genes in other species have linked the family to drought tolerance, disease resistance, and stomatal density regulation.