7L3L image
Deposition Date 2020-12-17
Release Date 2021-02-17
Last Version Date 2023-10-18
Entry Detail
PDB ID:
7L3L
Keywords:
Title:
Structure of TRAF5 and TRAF6 RING Hetero dimer
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.80 Å
R-Value Free:
0.23
R-Value Work:
0.20
R-Value Observed:
0.21
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:TNF receptor-associated factor 5
Gene (Uniprot):TRAF5
Chain IDs:A, C
Chain Length:142
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:TNF receptor-associated factor 6
Gene (Uniprot):TRAF6
Chain IDs:B, D
Chain Length:107
Number of Molecules:2
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
The structure and ubiquitin binding properties of TRAF RING heterodimers.
J.Mol.Biol. ? 166844 166844 (2021)
PMID: 33539883 DOI: 10.1016/j.jmb.2021.166844

Abstact

Tumour necrosis factor (TNF) receptor associated factor (TRAF) family members share a common domain architecture, but play non-redundant physiological roles in cell signalling. At the N terminus, most TRAFs have a RING domain, followed by a series of Zinc finger (ZF) domains. The RING domain of TRAF6 dimerizes, and the RING homodimer together with the first ZF assembles ubiquitin chains that form a platform which facilitates activation of downstream kinases. The RING dimer interface is conserved amongst TRAF proteins, suggesting that functional heterodimers could be possible. Here we report the structure of the TRAF5-TRAF6 RING heterodimer, which accounts for the stability of the heterodimer as well as its ability to assemble ubiquitin chains. We also show that the RING domain of TRAF6 heterodimerizes with TRAF3 and TRAF2, and demonstrate that the linker helix and first ZF of TRAF2 can cooperate with TRAF6 to promote chain assembly. Collectively our results suggest that TRAF RING homo- and hetero-dimers have the potential to bridge interaction of nearby TRAF trimers and modulate TRAF-mediated signalling.

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