1U5R

Crystal Structure of the TAO2 Kinase Domain: Activation and Specifity of a Ste20p MAP3K


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of the TAO2 Kinase Domain; Activation and Specificity of a Ste20p MAP3K.

Zhou, T.Raman, M.Gao, Y.Earnest, S.Chen, Z.Machius, M.Cobb, M.H.Goldsmith, E.J.

(2004) Structure 12: 1891-1900

  • DOI: 10.1016/j.str.2004.07.021
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • TAO2 is a mitogen-activated protein kinase kinase kinase (MAP3K) that doubly phosphorylates and activates the MAP kinase kinases (MAP2Ks) MEK3 and MEK6. The structure of the kinase domain of TAO2 (1-320) has been solved in its phosphorylated active c ...

    TAO2 is a mitogen-activated protein kinase kinase kinase (MAP3K) that doubly phosphorylates and activates the MAP kinase kinases (MAP2Ks) MEK3 and MEK6. The structure of the kinase domain of TAO2 (1-320) has been solved in its phosphorylated active conformation. The structure, together with structure-based mutagenic analysis, reveals that positively charged residues in the substrate binding groove mediate the first step in the dual phosphorylation of MEK6, on the threonine residue in the motif DS*VAKT*I (*denotes phosphorylation site) of MEK6. TAO2 is a Ste20p homolog, and the structure of active TAO2, in comparison with that of low-activity p21-activated protein kinase (PAK1), a Ste20p-related MAP4K, reveals how this group of kinases is activated by phosphorylation. Finally, active TAO2 displays unusual interactions with ATP, involving, in part, a subgroup-specific C-terminal extension of TAO2. The observed interactions may be useful in making specific inhibitors of TAO kinases.


    Organizational Affiliation

    Department of Biochemistry, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
serine/threonine protein kinase TAO2
A, B
348Rattus norvegicusMutation(s): 0 
Gene Names: Taok2 (Tao2)
EC: 2.7.11.1
Find proteins for Q9JLS3 (Rattus norvegicus)
Go to UniProtKB:  Q9JLS3
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download SDF File 
Download CCD File 
A, B
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
CA
Query on CA

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Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A, B
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.211 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 186.467α = 90.00
b = 186.467β = 90.00
c = 91.100γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
HKL-2000data collection
CNSphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-10-12
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance