The function of Ensembl gene identifier ENSG00000139160 (ETFBKMT, electron transfer flavoprotein subunit beta lysine methyltransferase) is as follows. Protein-lysine methyltransferase that selectively trimethylates the flavoprotein ETFB in mitochondria (PubMed:25023281, PubMed:25416781). Thereby, may negatively regulate the function of ETFB in electron transfer from Acyl-CoA dehydrogenases to the main respiratory chain (PubMed:25416781). {ECO:0000269|PubMed:25023281, ECO:0000269|PubMed:25416781}.