ABI2 — Arabidopsis thaliana

Summary

AT5G57050 (ABI2, ABA INSENSITIVE 2) in Arabidopsis thaliana encodes a protein phosphatase 2C (PP2C) family member with a PP2C_BS domain. The gene product is associated with multiple molecular functions including sucrose-phosphate synthase activity, kinase regulator activity, and protein phosphatase binding. ABI2 is linked to diverse biological processes such as regulation of proline anabolism, flavone metabolism, signaling, and response to gravity. It has been connected to numerous agronomically relevant traits including drought sensitivity, water stress response, leaf water potential, sodium and potassium content, root system morphology, and submergence tolerance. The protein localizes to the Arp2/3 complex, SCAR complex, and secondary cell wall. Studies of related genes in other species link the PP2C family to drought recovery, shoot branching, and ABA-mediated seed germination inhibition.