E3 ubiquitin-protein ligase MARCHF4 (MARCHF4)

E3 ubiquitin-protein ligase that may mediate ubiquitination of MHC-I and CD4, and promote their subsequent endocytosis and sorting to lysosomes through multivesicular bodies. E3 ubiquitin ligases take ubiquitin from an E2 ubiquitin- conjugating enzyme in the form of a thioester and then directly transfer the ubiquitin to targeted substrates.

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