2M7Q image
Deposition Date 2013-04-29
Release Date 2013-12-04
Last Version Date 2024-05-15
Entry Detail
PDB ID:
2M7Q
Title:
Solution structure of TAX1BP1 UBZ1+2
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Conformers Calculated:
100
Conformers Submitted:
20
Selection Criteria:
structures with the lowest energy
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Tax1-binding protein 1
Gene (Uniprot):TAX1BP1
Chain IDs:A
Chain Length:69
Number of Molecules:1
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
The structure of TAX1BP1 UBZ1+2 provides insight into target specificity and adaptability.
J.Mol.Biol. 426 674 690 (2014)
PMID: 24239949 DOI: 10.1016/j.jmb.2013.11.006

Abstact

TAX1BP1 is a novel ubiquitin-binding adaptor protein involved in the negative regulation of the NF-kappaB transcription factor, which is a key player in inflammatory responses, immunity and tumorigenesis. TAX1BP1 recruits A20 to the ubiquitinated signaling proteins TRAF6 and RIP1, leading to their A20-mediated deubiquitination and the disruption of IL-1-induced and TNF-induced NF-kappaB signaling, respectively. The two zinc fingers localized at its C-terminus function as novel ubiquitin-binding domains (UBZ, ubiquitin-binding zinc finger). Here we present for the first time both the solution and crystal structures of two classical UBZ domains in tandem within the human TAX1BP1. The relative orientation of the two domains is slightly different in the X-ray structure with respect to the NMR structure, indicating some degree of conformational flexibility, which is rationalized by NMR relaxation data. The observed degree of flexibility and stability between the two UBZ domains might have consequences on the recognition mechanism of interacting partners.

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Primary Citation of related structures