The function of ENSG00000183044 (ABAT, 4-aminobutyrate aminotransferase) is as follows. Catalyzes the conversion of gamma-aminobutyrate and L-beta- aminoisobutyrate to succinate semialdehyde and methylmalonate semialdehyde, respectively (PubMed:10407778, PubMed:15528998). Can also convert delta-aminovalerate and beta-alanine (By similarity). {ECO:0000250|UniProtKB:P50554, ECO:0000269|PubMed:10407778, ECO:0000269|PubMed:15528998}.