2ZVO image
Entry Detail
PDB ID:
2ZVO
Title:
NEMO CoZi domain in complex with diubiquitin in C2 space group
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2008-11-12
Release Date:
2009-03-24
Method Details:
Experimental Method:
Resolution:
2.90 Å
R-Value Free:
0.27
R-Value Work:
0.23
R-Value Observed:
0.23
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:UBC protein
Chain IDs:A, B (auth: G)
Chain Length:154
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:NF-kappa-B essential modulator
Mutations:E282A, K285A
Chain IDs:C (auth: B), D
Chain Length:92
Number of Molecules:2
Biological Source:Mus musculus
Primary Citation
Specific recognition of linear ubiquitin chains by NEMO is important for NF-kappaB activation
Cell(Cambridge,Mass.) 136 1098 1109 (2009)
PMID: 19303852 DOI: 10.1016/j.cell.2009.03.007

Abstact

Activation of nuclear factor-kappaB (NF-kappaB), a key mediator of inducible transcription in immunity, requires binding of NF-kappaB essential modulator (NEMO) to ubiquitinated substrates. Here, we report that the UBAN (ubiquitin binding in ABIN and NEMO) motif of NEMO selectively binds linear (head-to-tail) ubiquitin chains. Crystal structures of the UBAN motif revealed a parallel coiled-coil dimer that formed a heterotetrameric complex with two linear diubiquitin molecules. The UBAN dimer contacted all four ubiquitin moieties, and the integrity of each binding site was required for efficient NF-kappaB activation. Binding occurred via a surface on the proximal ubiquitin moiety and the canonical Ile44 surface on the distal one, thereby providing specificity for linear chain recognition. Residues of NEMO involved in binding linear ubiquitin chains are required for NF-kappaB activation by TNF-alpha and other agonists, providing an explanation for the detrimental effect of NEMO mutations in patients suffering from X-linked ectodermal dysplasia and immunodeficiency.

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