Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 44.84 kDa 
• Atom Count: 3130 
• Residue Count: 370 
• Unique protein chains: 2

4LOO

Structural basis of autoactivation of p38 alpha induced by TAB1 (Monoclinic crystal form)

• DOI: 10.2210/pdb4LOO/pdb

• Classification: TRANSFERASE
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-07-13 Released: 2013-08-21 
• Deposition Author(s): Chaikuad, A., DeNicola, G.F., Krojer, T., Allerston, C.K., von Delft, F., Arrowsmith, C.H., Edwards, A.M., Bountra, C., Marber, M.S., Knapp, S., Structural Genomics Consortium (SGC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.250 
• R-Value Work: 0.198 
• R-Value Observed: 0.200 

Literature

Mechanism and consequence of the autoactivation of p38 alpha mitogen-activated protein kinase promoted by TAB1.

De Nicola, G.F., Martin, E.D., Chaikuad, A., Bassi, R., Clark, J., Martino, L., Verma, S., Sicard, P., Tata, R., Atkinson, R.A., Knapp, S., Conte, M.R., Marber, M.S.

(2013) Nat Struct Mol Biol 20: 1182-1190

• PubMed: 24037507 
• DOI: 10.1038/nsmb.2668
• Primary Citation of Related Structures:  
  4LOO, 4LOP, 4LOQ


• PubMed Abstract: 
  

p38α mitogen-activated protein kinase (p38α) is activated by a variety of mechanisms, including autophosphorylation initiated by TGFβ-activated kinase 1 binding protein 1 (TAB1) during myocardial ischemia and other stresses. Chemical-genetic approaches and coexpression in mammalian, bacterial and cell-free systems revealed that mouse p38α autophosphorylation occurs in cis by direct interaction with TAB1(371-416). In isolated rat cardiac myocytes and perfused mouse hearts, TAT-TAB1(371-416) rapidly activates p38 and profoundly perturbs function. Crystal structures and characterization in solution revealed a bipartite docking site for TAB1 in the p38α C-terminal kinase lobe. TAB1 binding stabilizes active p38α and induces rearrangements within the activation segment by helical extension of the Thr-Gly-Tyr motif, allowing autophosphorylation in cis. Interference with p38α recognition by TAB1 abolishes its cardiac toxicity. Such intervention could potentially circumvent the drawbacks of clinical pharmacological inhibitors of p38 catalytic activity.

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Organizational Affiliation: 

King's College London British Heart Foundation Centre of Excellence. The Rayne Institute, St Thomas' Hospital Campus, London, SE1 7EH, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Mitogen-activated protein kinase 14	A	361	Mus musculus	Mutation(s): 0  Gene Names: Mapk14, Crk1, Csbp1, Csbp2 EC: 2.7.11.24
Find proteins for P47811 (Mus musculus) Explore P47811  Go to UniProtKB:  P47811

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
TGF-beta-activated kinase 1 and MAP3K7-binding protein 1	B	29	Mus musculus	Mutation(s): 0  Gene Names: Tab1, Map3k7ip1
Find proteins for Q8CF89 (Mus musculus) Explore Q8CF89  Go to UniProtKB:  Q8CF89

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SB4	A	4-(4-FLUOROPHENYL)-1-(4-PIPERIDINYL)-5-(2-AMINO-4-PYRIMIDINYL)-IMIDAZOLE C18 H19 F N6 VSPFURGQAYMVAN-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
SB4	Kd :  7   nM  PDBBind

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.250 
• R-Value Work: 0.198 
• R-Value Observed: 0.200 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 43.34	α = 90
b = 73.58	β = 91.15
c = 59.19	γ = 90

Software Package:

Software Name	Purpose
GDA	data collection
PHASER	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-07-13 
• Released Date: 2013-08-21 
Deposition Author(s): Chaikuad, A., DeNicola, G.F., Krojer, T., Allerston, C.K., von Delft, F., Arrowsmith, C.H., Edwards, A.M., Bountra, C., Marber, M.S., Knapp, S., Structural Genomics Consortium (SGC)

Revision History 

• Version 1.0: 2013-08-21
  Type: Initial release
  
• Version 1.1: 2013-09-11
  Changes: Database references
• Version 1.2: 2013-10-02
  Changes: Database references
• Version 1.3: 2013-10-23
  Changes: Database references