5H07

TNIP2-Ub complex, C2 form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.218 

wwPDB Validation 3D Report Full Report



Literature

Structural Insights into Linear Tri-ubiquitin Recognition by A20-Binding Inhibitor of NF-kappa B, ABIN-2

Lin, S.M.Lin, S.C.Hong, J.Y.Su, T.W.Kuo, B.J.Chang, W.H.Tu, Y.F.Lo, Y.C.

(2017) Structure 25: 66-78

  • DOI: 10.1016/j.str.2016.11.005
  • Primary Citation of Related Structures:  
    5H07

  • PubMed Abstract: 
  • Recognition of linear polyubiquitin by specific ubiquitin-binding proteins plays an important role in mediating nuclear factor-κB (NF-κB) signaling. A20 binding proteins, ABINs, recognize linear polyubiquitin and A20 through UBAN and AHD1, respective ...

    Recognition of linear polyubiquitin by specific ubiquitin-binding proteins plays an important role in mediating nuclear factor-κB (NF-κB) signaling. A20 binding proteins, ABINs, recognize linear polyubiquitin and A20 through UBAN and AHD1, respectively, for the inhibition of NF-κB activation. Here we report the crystal structure of the AHD1-UBAN fragment of ABIN2 in complex with linear tri-ubiquitin, which reveals a 2:1 stoichiometry of the complex. Structural analyses together with mutagenesis, pull-down, and isothermal titration calorimetry assays show that the hABIN2:tri-ubiquitin interaction is mainly through the primary ubiquitin-binding site, and also through the secondary ubiquitin-binding site under a high local protein concentration. Surprisingly, three ubiquitin units could form a right-handed helical trimer to bridge two ABIN2 dimers. The residues around the M1-linkage are crucial for ABIN2 to recognize tri-ubiquitin. The tri-ubiquitin bridging two ABIN2 dimers model suggests a possible higher-order signaling complex assembled between M1-linked polyubiquitinated proteins, ubiquitin-binding proteins, and effector signaling proteins in signal transduction.


    Organizational Affiliation

    Institute of Bioinformatics and Biosignal Transduction, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan 70101, Taiwan; Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, 70101, Taiwan; Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan 70101, Taiwan. Electronic address: gracelo@mail.ncku.edu.tw.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Polyubiquitin-CA228Homo sapiensMutation(s): 0 
Gene Names: UBC
Find proteins for P0CG48 (Homo sapiens)
Explore P0CG48 
Go to UniProtKB:  P0CG48
NIH Common Fund Data Resources
PHAROS  P0CG48
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TNFAIP3-interacting protein 2CD91Homo sapiensMutation(s): 0 
Gene Names: TNIP2ABIN2FLIP1
Find proteins for Q8NFZ5 (Homo sapiens)
Explore Q8NFZ5 
Go to UniProtKB:  Q8NFZ5
NIH Common Fund Data Resources
PHAROS  Q8NFZ5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.218 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.765α = 90
b = 80.972β = 114.28
c = 65.352γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2016-10-04 
  • Released Date: 2017-03-08 
  • Deposition Author(s): Lo, Y.C., Lin, S.C.

Funding OrganizationLocationGrant Number
Ministry of Science and TechnologyTaiwanNSC 101-2311-B-006-008-MY3
Ministry of Science and TechnologyTaiwanMOST 104-2320-B-006-033-MY3
Taiwan Protein ProjectTaiwanMOST 105-0210-01-12-01

Revision History 

  • Version 1.0: 2017-03-08
    Type: Initial release