The function of ASPNAT (aspartate N-acetyltransferase, ENSG00000185818) is as follows. Catalyzes the synthesis of N-acetylaspartate acid (NAA) from L-aspartate and acetyl-CoA (PubMed:19524112, PubMed:19807691, PubMed:20385109). Promotes dopamine uptake by regulating TNF expression (By similarity). Attenuates methamphetamine-induced inhibition of dopamine uptake (PubMed:20385109). {ECO:0000250|UniProtKB:Q3UGX3, ECO:0000269|PubMed:19524112, ECO:0000269|PubMed:19807691, ECO:0000269|PubMed:20385109}.