Structure of the UBZ1and2 tandem of the ubiquitin-binding adaptor protein TAX1BP1

Experimental Data Snapshot

  • Resolution: 2.75 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


The Structure of Tax1BP1 Ubz1 + 2 Provides Insight Into Target Specificity and Adaptability

Ceregido, M.A.Spinola-Amilibia, M.Buts, L.Rivera-Torres, J.Garcia-Pino, A.Bravo, J.Van Nuland, N.A.J.

(2014) J Mol Biol 426: 674

  • DOI: https://doi.org/10.1016/j.jmb.2013.11.006
  • Primary Citation of Related Structures:  
    2M7Q, 4BMJ

  • PubMed Abstract: 

    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.

  • Organizational Affiliation

    Departamento de Química Física e Instituto de Biotecnología, Facultad de Ciencias, Universidad de Granada, Granada 18071, Spain; Jean Jeener NMR Centre, Structural Biology Brussels, Vrije Universiteit Brussel, Brussels 1050, Belgium; Molecular Recognition Unit, Department of Structural Biology, VIB, Brussels 1050, Belgium.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F, G, H, I, J, K
69Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q86VP1 (Homo sapiens)
Explore Q86VP1 
Go to UniProtKB:  Q86VP1
GTEx:  ENSG00000106052 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ86VP1
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ZN

Download Ideal Coordinates CCD File 
BA [auth F]
CA [auth F]
EA [auth G]
FA [auth G]
HA [auth H]
BA [auth F],
CA [auth F],
EA [auth G],
FA [auth G],
HA [auth H],
IA [auth H],
KA [auth I],
L [auth A],
LA [auth I],
M [auth A],
NA [auth J],
O [auth B],
OA [auth J],
P [auth B],
QA [auth K],
RA [auth K],
S [auth C],
T [auth C],
V [auth D],
W [auth D],
Y [auth E],
Z [auth E]
Query on CL

Download Ideal Coordinates CCD File 
AA [auth E]
DA [auth F]
GA [auth G]
JA [auth H]
MA [auth I]
AA [auth E],
DA [auth F],
GA [auth G],
JA [auth H],
MA [auth I],
N [auth A],
PA [auth J],
Q [auth B],
R [auth B],
SA [auth K],
U [auth C],
X [auth D]
Experimental Data & Validation

Experimental Data

  • Resolution: 2.75 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 118.878α = 90
b = 118.878β = 90
c = 327.345γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-11-20
    Type: Initial release
  • Version 1.1: 2013-11-27
    Changes: Database references
  • Version 1.2: 2014-02-05
    Changes: Database references
  • Version 1.3: 2017-08-09
    Changes: Data collection, Refinement description