The function of Ensembl gene identifier ENSG00000173200 (PARP15, poly(ADP-ribose) polymerase family member 15) is as follows. Mono-ADP-ribosyltransferase that mediates mono-ADP- ribosylation of target proteins (PubMed:16061477, PubMed:25043379, PubMed:25635049). Acts as a negative regulator of transcription (PubMed:16061477). {ECO:0000269|PubMed:16061477, ECO:0000269|PubMed:25043379, ECO:0000269|PubMed:25635049}.