SOS2 — Arabidopsis thaliana

Summary

AT5G35410, known as SOS2, SNRK3.11 or CIPK24 in Arabidopsis thaliana, encodes a non-specific serine/threonine protein kinase containing a NAF/FISL domain. The gene is associated with diverse molecular functions including calcium:monoatomic cation antiporter activity, S-nitrosylase activity, nucleoside diphosphate kinase activity, and ATPase inhibitor activity. It has been linked to biological processes such as cell pH elevation, vacuole fusion, regulation of potassium transport, downregulation of seed dormancy, and responses to basic pH. The product localizes to the vacuolar membrane, pollen tube, and proton-transporting ATPase complexes. Associations with agronomically relevant traits include sodium uptake, potassium content, drought recovery, cell membrane stability, leaf area index, inflorescence height, and sensitivities to alkali, drought, and photoperiod. Studies of related genes in other species link the family to cold stress and ion imbalance sensitivity, and to abscisic acid response.