Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

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

Biological Assembly Evidence: isothermal titration calorimetry

Macromolecule Content

• Total Structure Weight: 44735.01 
• Atom Count: 2591 
• Residue Count: 389 
• Unique protein chains: 2

5O90

Crystal structure of a P38alpha T185G mutant in complex with TAB1 peptide.

• DOI: 10.2210/pdb5O90/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens, Mus musculus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): 1 


• Deposited: 2017-06-15 Released: 2018-01-31 
• Deposition Author(s): Nichols, C.E., De Nicola, G.F., Thapa, D.
• Funding Organization(s): BHF 

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.49 Å
• R-Value Free: 0.275 
• R-Value Work: 0.249 

Literature

TAB1-Induced Autoactivation of p38 alpha Mitogen-Activated Protein Kinase Is Crucially Dependent on Threonine 185.

Thapa, D., Nichols, C., Bassi, R., Martin, E.D., Verma, S., Conte, M.R., De Santis, V., De Nicola, G.F., Marber, M.S.

(2018) Mol. Cell. Biol. 38: --

• PubMed: 29229647 
• DOI: 10.1128/MCB.00409-17


• PubMed Abstract: 
  

p38α mitogen-activated protein kinase is essential to cellular homeostasis. Two principal mechanisms exist to activate p38α. The first, relies on dedicated dual specificity kinases such as MAP2K3 (MKK3) or MAP2K6 (MKK6), which activate p38α by phosphorylating Thr180 and Tyr182 within the activation segment. The second, is by autophosphorylation of Thr180 and Tyr182 in cis; mediated by p38α binding the scaffold protein TAB1. The second mechanism occurs during myocardial ischemia, where it aggravates myocardial infarction. Based on the crystal structure of the p38α-TAB1 complex we substituted Threonine185 of p38α for Glycine (T185G) to prevent an intramolecular hydrogen bond formed with Asp150. This mutation did not interfere with TAB1 binding to p38α. However, it disrupted the consequent long range effect of this binding event on the distal activation segment, releasing the constraint on Thr180 that orientated its hydroxyl for phosphotransfer. Based on assays performed in vitro and in vivo, the autoactivation of p38α(T185G) was disabled, whilst its ability to be activated by upstream MAP2Ks and to phosphorylate downstream substrates remained intact. Furthermore, myocardial cells expressing p38α(T185G) were resistant to injury. These findings reveal a mechanism to selectively disable p38α autoactivation and its consequences; which may ultimately circumvent the toxicity associated with strategies that inhibit p38α kinase activity under all circumstances, such as with ATP-competitive inhibitors.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Mitogen-activated protein kinase 14	A	360	Mus musculus	Mutation(s): 1  Gene Names: Mapk14 (Crk1, Csbp1, Csbp2) EC: 2.7.11.24
Find proteins for P47811 (Mus musculus) Go to UniProtKB:  P47811

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
TGF-beta-activated kinase 1 and MAP3K7-binding protein 1	B	29	Homo sapiens	Mutation(s): 0  Gene Names: TAB1 (MAP3K7IP1)
Find proteins for Q15750 (Homo sapiens) Go to Gene View: TAB1 Go to UniProtKB:  Q15750

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SB4	A	4-(4-FLUOROPHENYL)-1-(4-PIPERIDINYL)-5-(2-AMINO-4-PYRIMIDINYL)-IMIDAZOLE SB220025 C18 H19 F N6 VSPFURGQAYMVAN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.49 Å
• R-Value Free: 0.275 
• R-Value Work: 0.249 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 45.920	α = 90.00
b = 73.580	β = 91.09
c = 58.970	γ = 90.00

Software Package:

Software Name	Purpose
PHASER	phasing
xia2	data scaling
xia2	data reduction
PHENIX	refinement

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2017-06-15 
• Released Date: 2018-01-31 
• Deposition Author(s): Nichols, C.E., De Nicola, G.F., Thapa, D.

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Funding Organization	Location	Grant Number
BHF	United Kingdom	BHF - FS/14/29/30896 - DE NICOLA

Revision History 

• Version 1.0: 2018-01-31
  Type: Initial release
• Version 1.1: 2018-02-21
  Type: Database references