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5D0K

Structure of UbE2D2:RNF165:Ub complex

Summary for 5D0K
Entry DOI10.2210/pdb5d0k/pdb
Related5D0I 5D0M
DescriptorUbiquitin-conjugating enzyme E2 D2, RING finger protein 165, Polyubiquitin-B, ... (5 entities in total)
Functional Keywordscomplex, ubiquitin, ligase
Biological sourceHomo sapiens (Human)
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Cellular locationUbiquitin: Cytoplasm : P0CG47
Total number of polymer chains12
Total formula weight144852.12
Authors
Wright, J.D.,Day, C.L.,Mace, P.D. (deposition date: 2015-08-03, release date: 2015-12-09, Last modification date: 2024-03-06)
Primary citationWright, J.D.,Mace, P.D.,Day, C.L.
Secondary ubiquitin-RING docking enhances Arkadia and Ark2C E3 ligase activity.
Nat.Struct.Mol.Biol., 23:45-52, 2016
Cited by
PubMed Abstract: RING-domain E3 ligases enhance transfer of ubiquitin to substrate proteins by stabilizing the RING-bound thioester-linked E2∼ubiquitin conjugate in a defined conformation that primes the active site for nucleophilic attack. Here we report that the monomeric RING domains from the human E3 ligases Arkadia and Ark2C bind directly to free ubiquitin with an affinity comparable to that of other dedicated ubiquitin-binding domains. Further work showed that the Ark-like RING domain and the noncovalently bound ubiquitin molecule coordinately stabilize the E2-conjugated ubiquitin (donor ubiquitin) in the 'closed' conformation. Our studies identify the RING domain of Arkadia as a ubiquitin-binding domain and provide insight into a new ubiquitin-dependent mechanism used by monomeric RING domains to activate ubiquitin transfer. This study also suggests how substrates that have been monoubiquitinated could be favored for further ubiquitination.
PubMed: 26656854
DOI: 10.1038/nsmb.3142
PDB entries with the same primary citation
Experimental method
X-RAY DIFFRACTION (2.65 Å)
Structure validation

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