Intracellular abscisic acid (ABA) receptor that functions as a positive regulator of ABA signaling pathway (PubMed:22071266, PubMed:24474809). Together with ABI5, PP2C30 and SAPK2, is part of an ABA signaling unit that modulates seed germination and early seedling growth (PubMed:22071266). Acts as positive regulator of abiotic stress-responsive gene expression (PubMed:24474809). Inhibits the protein phosphatases PP2C06 and PP2C09 when activated by ABA (PubMed:24743650). Monomer (PubMed:24743650). Interacts with PP2C30. Binding to PP2C30 is dependent on the presence of abscisic acid (ABA) (PubMed:22071266, PubMed:26362328). Interacts with PP2C51. Binding to PP2C51 is dependent on the presence of ABA (PubMed:28000033). Interacts with PP2C50. Binding to PP2C50 is dependent on the presence of ABA (PubMed:28827170). Interacts with PP2C53 (PubMed:26362328). Expressed in leaf sheaths and leaf blades. Expressed at low levels in roots, flowers and seeds. Repressed by abscisic acid (ABA) and drought stress. Plants overexpressing PYL5 exhibit abscisic acid (ABA) hypersensitive phenotypes (PubMed:22071266). Plants overexpressing PYL5 exhibit tolerance to salt and drought stresses, but are hypersensitive to osmotic stress and ABA during vegetative growth (PubMed:24474809). Belongs to the PYR/PYL/RCAR abscisic acid intracellular receptor family.