Receptor for abscisic acid (ABA) required for ABA-mediated responses such as stomatal closure and germination inhibition. Inhibits the activity of group-A protein phosphatases type 2C (PP2Cs) in an ABA-independent manner but more efficiently when activated by ABA (PubMed:23844015, PubMed:21658606). Can be activated by both (-)-ABA and (+)-ABA (PubMed:23844015). May link ABA and jasmonate signaling pathways by modifying MYC2 transcriptional activity, and regulation of JAZ6 and JAZ8 gene expression by MYC2 (PubMed:27357749). Monomer (PubMed:21658606). Homodimer. Binds ABA on one subunit only (By similarity). Interacts with HAB1, ABI1 and ABI2, and possibly with other PP2Cs (PubMed:19624469, PubMed:19874541, PubMed:19898420). Binds to CARs protein in an ABA-independent manner, both at the plasma membrane and in the nucleus. Interacts directly with CAR1 and CAR4 (PubMed:25465408). Interacts with MYC2 in the nucleus. Interaction with MYC2 is increased in the presence of abscisic acid (PubMed:27357749). Localizes at the plasma membrane in the presence of a CAR protein (e.g. CAR1 and CAR4). Upon interaction with ABA, the 'latch' and 'gate' loops change in conformation leading to a tight dimerization and the creation a surface that enables the receptor to dock into and inhibit the PP2C active site. No visible phenotype under normal growth conditions, but mutant seedlings exhibit increased sensitivity to abscisic acid-induced inhibition of cotyledon expansion. The inhibition effect is more severe with the combination of abscisic acid and jasmonate. Belongs to the PYR/PYL/RCAR abscisic acid intracellular receptor family. Truncated N-terminus.