2J4O

Structure of TAB1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Tak1-Binding Protein 1 is a Pseudophosphatase.

Conner, S.H.Kular, G.Peggie, M.Shepherd, S.Schuttelkopf, A.W.Cohen, P.Van Aalten, D.M.F.

(2006) Biochem.J. 399: 427

  • DOI: 10.1042/BJ20061077

  • PubMed Abstract: 
  • TAB1 [TAK1 (transforming growth factor-beta-activated kinase 1)-binding protein 1] is one of the regulatory subunits of TAK1, a protein kinase that lies at the head of three pro-inflammatory kinase cascades. In the current study we report the crystal ...

    TAB1 [TAK1 (transforming growth factor-beta-activated kinase 1)-binding protein 1] is one of the regulatory subunits of TAK1, a protein kinase that lies at the head of three pro-inflammatory kinase cascades. In the current study we report the crystal structure of the N-terminal domain of TAB1. Surprisingly, TAB1 possesses a fold closely related to that of the PPM (Mg2+- or Mn2+-dependent protein phosphatase) family as demonstrated by the close structural similarity with protein phosphatase 2C alpha. However, we were unable to detect any phosphatase activity for TAB1 using a phosphopeptide or p-nitrophenyl phosphate as substrate. Although the overall protein phosphatase 2C alpha fold is conserved in TAB1, detailed structural analyses and mutagenesis studies show that several key residues required for dual metal-binding and catalysis are not present in TAB1, although binding of a single metal is supported by soaking experiments with manganese and isothermal titration calorimetry. Thus, it appears that TAB1 is a 'pseudophosphatase', possibly binding to and regulating accessibility of phosphorylated residues on substrates downstream of TAK1 or on the TAK1 complex itself.


    Organizational Affiliation

    MRC Protein Phosphorylation Unit, School of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MITOGEN-ACTIVATED PROTEIN KINASE KINASE KINASE 7-INTERACTING PROTEIN 1
A
401Homo sapiensMutation(s): 0 
Gene Names: TAB1 (MAP3K7IP1)
Find proteins for Q15750 (Homo sapiens)
Go to Gene View: TAB1
Go to UniProtKB:  Q15750
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.228 
  • Space Group: P 3 2 1
Unit Cell:
Length (Å)Angle (°)
a = 141.961α = 90.00
b = 141.961β = 90.00
c = 65.905γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling
SHELXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2006-09-01 
  • Released Date: 2006-09-04 
  • Deposition Author(s): van Aalten, D.

Revision History 

  • Version 1.0: 2006-09-04
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance