3HVC

Crystal structure of human p38alpha MAP kinase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

p38alpha MAP kinase C-terminal domain binding pocket characterized by crystallographic and computational analyses.

Perry, J.J.Harris, R.M.Moiani, D.Olson, A.J.Tainer, J.A.

(2009) J.Mol.Biol. 391: 1-11

  • DOI: 10.1016/j.jmb.2009.06.005

  • PubMed Abstract: 
  • The mitogen-activated protein (MAP) kinase protein family has a critical role in cellular signaling events, with MAP kinase p38alpha acting in inflammatory processes and being an important drug discovery target. MAP kinase drug design efforts have fo ...

    The mitogen-activated protein (MAP) kinase protein family has a critical role in cellular signaling events, with MAP kinase p38alpha acting in inflammatory processes and being an important drug discovery target. MAP kinase drug design efforts have focused on small-molecule inhibitors of the ATP catalytic site, which exhibit dose-limiting adverse effects. Therefore, characterizing other potential sites that bind substrates, inhibitors, or allosteric effectors is of great interest. Here, we present the crystal structure of human p38alpha MAP kinase, which has a lead compound bound both in the active site and in the lipid-binding site of the C-terminal cap. This C-terminal cap is formed from an extension to the kinase fold, unique to the MAP kinase and cyclin-dependent kinase families and glycogen synthase kinase 3. Binding of this lead, 4-[3-(4-fluorophenyl)-1H-pyrazol-4-yl]pyridine, to wild-type p38alpha induces movement of the C-terminal cap region, creating a hydrophobic pocket centered around residue Trp197. Computational analysis of this C-terminal domain pocket indicates notable flexibility for potentially binding different-shaped compounds, including lipids, oxidized arachidonic acid species such as leukotrienes, and small-molecule effectors. Furthermore, our structural results defining the open p38alpha C-lobe pocket provide a detailed framework for the design of novel small molecules with affinities comparable to active-site binders: to bind and potentially modulate the shape and activity of p38alpha in predetermined ways. Moreover, these results and analyses of p38alpha suggest strategies for designing specific binding compounds applicable to other MAP kinases, as well as the cyclin-dependent kinase family and glycogen synthase kinase 3beta that also utilize the C-terminal insert in their interactions.


    Organizational Affiliation

    Department of Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mitogen-activated protein kinase 14
A
362Homo sapiensGene 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
GG5
Query on GG5

Download SDF File 
Download CCD File 
A
4-[3-(4-FLUOROPHENYL)-1H-PYRAZOL-4-YL]PYRIDINE
C14 H10 F N3
BILJSHVAAVZERY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
GG5IC50: 67 - 600 nM (100) BINDINGDB
GG5IC50: 600 nM BINDINGMOAD
GG5IC50: 600 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.226 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 64.940α = 90.00
b = 74.690β = 90.00
c = 77.110γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data scaling
HKL-2000data collection
AMoREphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-06-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance