CPK6 — Arabidopsis thaliana

Summary

AT2G17290 (CPK6) in Arabidopsis thaliana encodes a calcium-dependent protein kinase (CDPK) with serine/threonine kinase activity, calcium ion binding, and anion transporter activity, including nitrate transmembrane transport. It is associated with drought and salt tolerance, camalexin biosynthesis, potassium channel activity, and regulation of stomatal opening. The gene is linked to responses to water, humidity, carbon dioxide, nitrate, and photoperiodism, as well as basipetal auxin transport and lipid modification. CPK6 localizes to the membrane, mitochondria, cytosol, plasma membrane, and nucleus. It is associated with abscisic acid-mediated signaling and responses to abiotic stresses. Studies of related genes in rice associate the family with plant height and spikelet size, while tobacco studies link it to reactive oxygen species production and hypersensitive response.