2FST

mitogen activated protein kinase p38alpha (D176A+F327L) activating mutant

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Structures of p38alpha Active Mutants Reveal Conformational Changes in L16 Loop that Induce Autophosphorylation and Activation

Diskin, R., Lebendiker, M., Engelberg, D., Livnah, O.

(2007) J.Mol.Biol. 365: 66-76

  • DOI: 10.1016/j.jmb.2006.08.043
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • p38 mitogen-activated protein (MAP) kinases function in numerous signaling processes and are crucial for normal functions of cells and organisms. Abnormal p38 activity is associated with inflammatory diseases and cancers making the understanding of i ...

    p38 mitogen-activated protein (MAP) kinases function in numerous signaling processes and are crucial for normal functions of cells and organisms. Abnormal p38 activity is associated with inflammatory diseases and cancers making the understanding of its activation mechanisms highly important. p38s are commonly activated by phosphorylation, catalyzed by MAP kinase kinases (MKKs). Moreover, it was recently revealed that the p38alpha is also activated via alternative pathways, which are MKK independent. The structural basis of p38 activation, especially in the alternative pathways, is mostly unknown. This lack of structural data hinders the study of p38's biology as well as the development of novel strategies for p38 inhibition. We have recently discovered and optimized a novel set of intrinsically active p38 mutants whose activities are independent of any upstream activation. The high-resolution crystal structures of the intrinsically active p38alpha mutants reveal that local alterations in the L16 loop region promote kinase activation. The L16 loop can be thus regarded as a molecular switch that upon conformational changes promotes activation. We suggest that similar conformational changes in L16 loop also occur in natural activation mechanisms of p38alpha in T-cells. Our biochemical studies reveal novel mechanistic insights into the activation process of p38. In this regard, the results indicate that the activation mechanism of the mutants involves dimerization and subsequent trans autophosphorylation on Thr180 (on the phosphorylation lip). Finally, we suggest a model of in vivo p38alpha activation induced by the L16 switch with auto regulatory characteristics.

    Organizational Affiliation: 

    The Wolfson Centre for Applied Structural Biology, The Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mitogen-activated protein kinase 14
X
367Homo sapiensMutation(s): 2 
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: 1.45 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.206 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 68.673α = 90.00
b = 69.786β = 90.00
c = 74.227γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
HKL-2000data reduction
SCALEPACKdata scaling
REFMACrefinement

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2006-01-23 
  • Released Date: 2006-12-05 
  • Deposition Author(s): Diskin, R., Livnah, O.

Revision History 

  • Version 1.0: 2006-12-05
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance