ID 2.3.2.36 DE RING-type E3 ubiquitin transferase (cysteine targeting). AN RING E3 ligase. CA [E2 ubiquitin-conjugating enzyme]-S-ubiquitinyl-L-cysteine + [acceptor CA protein]-L-cysteine = [E2 ubiquitin-conjugating enzyme]-L-cysteine + CA [acceptor protein]-S-ubiquitinyl-L-cysteine. CC -!- This relatively rare subpopulation of RING-type E3 ubiquitin CC transferases (cf. EC 2.3.2.27), found in mammals and herpes viruses, CC can transfer ubiquitin to a cysteine residue in target proteins. CC -!- Additional ubiquitin molecules are polymerized on top of the initial CC ubiquitin molecule by formation of an isopeptide linkage with CC lysine(48) in the pre-attached ubiquitin. DR F1QB30, AMFR_DANRE ; Q9UKV5, AMFR_HUMAN ; Q9R049, AMFR_MOUSE ; DR P90495, MIR1_HHV8P ; O41933, MIR1_MHV68 ; Q96PU5, NED4L_HUMAN; DR Q8CFI0, NED4L_MOUSE; Q9CA86, PEX2_ARATH ; Q06438, PEX2_CRIGR ; DR E7F4V8, PEX2_DANRE ; Q75JQ3, PEX2_DICDI ; P28328, PEX2_HUMAN ; DR P55098, PEX2_MOUSE ; Q01964, PEX2_PICPA ; P51021, PEX2_PODAS ; DR P24392, PEX2_RAT ; G2Q1C9, PEX2_THET4 ; A0A1L8FZ98, PEX2_XENLA ; DR Q99155, PEX2_YARLI ; P32800, PEX2_YEAST ; //