Stimulates the GTPase/ATPase activities of Obg-like ATPases (By similarity). Mediates the transient calcium-dependent interaction of PYR/PYL/RCAR abscisic acid (ABA) receptors with the plasma membrane and thus regulates ABA sensitivity (By similarity). Binds to PYR/PYL/RCAR abscisic acid intracellular receptors in an ABA-independent manner, both at the plasma membrane and in the nucleus. Belongs to the plant CAR protein family.