3ODZ

Crystal structure of P38alpha Y323R active mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Active mutants of the TCR-mediated p38alpha alternative activation site show changes in the phosphorylation lip and DEF site formation.

Tzarum, N.Diskin, R.Engelberg, D.Livnah, O.

(2011) J.Mol.Biol. 405: 1154-1169

  • DOI: 10.1016/j.jmb.2010.11.023
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The p38α mitogen-activated protein kinase is commonly activated by dual (Thr and Tyr) phosphorylation catalyzed by mitogen-activated protein kinase kinases. However, in T-cells, upon stimulation of the T-cell receptor, p38α is activated via an altern ...

    The p38α mitogen-activated protein kinase is commonly activated by dual (Thr and Tyr) phosphorylation catalyzed by mitogen-activated protein kinase kinases. However, in T-cells, upon stimulation of the T-cell receptor, p38α is activated via an alternative pathway, involving its phosphorylation by zeta-chain-associated protein kinase 70 on Tyr323, distal from the phosphorylation lip. Tyr323-phosphorylated p38α is autoactivated, resulting in monophosphorylation of Thr180. The conformational changes induced by pTyr323 mediating autoactivation are not known. The lack of pTyr323 p38α for structural studies promoted the search for Tyr323 mutations that may functionally emulate its effect when phosphorylated. Via a comprehensive mutagenesis of Tyr323, we identified mutations that rendered the kinase intrinsically active and others that displayed no activity. Crystallographic studies of selected active (p38α(Y323Q), p38α(Y323T), and p38α(Y323R)) and inactive (p38α(Y323F)) mutants revealed that substantial changes in interlobe orientation, extended conformation of the activation loop, and formation of substrate docking DEF site (docking site for extracellular signal-regulated kinase FXF) interaction pocket are associated with p38α activation.


    Organizational Affiliation

    Department of Biological Chemistry, Alexander Silberman Institute of Life Sciences, Hebrew University of Jerusalem, Jerusalem 91904, Israel.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mitogen-activated protein kinase 14
X
360Homo sapiensMutation(s): 1 
Gene Names: MAPK14 (CSBP, CSBP1, CSBP2, CSPB1, MXI2, SAPK2A)
EC: 2.7.11.24
Find proteins for Q16539 (Homo sapiens)
Go to Gene View: MAPK14
Go to UniProtKB:  Q16539
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BOG
Query on BOG

Download SDF File 
Download CCD File 
X
B-OCTYLGLUCOSIDE
C14 H28 O6
HEGSGKPQLMEBJL-RKQHYHRCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.214 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 40.047α = 90.00
b = 72.313β = 105.02
c = 68.963γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data collection
MOLREPphasing
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2010-08-12 
  • Released Date: 2011-01-12 
  • Deposition Author(s): Livnah, O., Tzarum, N.

Revision History 

  • Version 1.0: 2011-01-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2013-07-03
    Type: Database references