The function of Ensembl gene identifier ENSG00000186591 (UBE2H, ubiquitin conjugating enzyme E2 H) is as follows. Accepts ubiquitin from the E1 complex and catalyzes its covalent attachment to other proteins (PubMed:17588522, PubMed:20061386, PubMed:8132613). E2 ubiquitin conjugating enzyme that transfers ubiquitin to MAEA, a core component of the CTLH E3 ubiquitin- protein ligase complex (PubMed:29911972). In vitro catalyzes 'Lys- 11'- and 'Lys-48'-linked polyubiquitination (PubMed:20061386). Capable, in vitro, to ubiquitinate histone H2A (PubMed:8132613). {ECO:0000269|PubMed:17588522, ECO:0000269|PubMed:20061386, ECO:0000269|PubMed:29911972, ECO:0000269|PubMed:8132613}.