Human p38 MAP Kinase in Complex with 2-amino-phenylamino- dibenzosuberone

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.172 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Skepinone-L is a Selective P38 Mitogen-Activated Protein Kinase Inhibitor.

Koeberle, S.C.Romir, J.Fischer, S.Koeberle, A.Schattel, V.Albrecht, W.Grutter, C.Werz, O.Rauh, D.Stehle, T.Laufer, S.A.

(2011) Nat Chem Biol 8: 141

  • DOI: https://doi.org/10.1038/nchembio.761
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Until now, a lack of inhibitors with high potency and selectivity in vivo has hampered investigation of the p38 mitogen-activated protein kinase (MAPK) signaling pathway. We describe the design of skepinone-L, which is, to our knowledge, the first ATP-competitive p38 MAPK inhibitor with excellent in vivo efficacy and selectivity. Therefore, skepinone-L is a valuable probe for chemical biology research, and it may foster the development of a unique class of kinase inhibitors.

  • Organizational Affiliation

    Institute of Pharmacy, University of Tübingen, Tübingen, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MITOGEN-ACTIVATED PROTEIN KINASE 14366Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q16539 (Homo sapiens)
Explore Q16539 
Go to UniProtKB:  Q16539
PHAROS:  Q16539
GTEx:  ENSG00000112062 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ16539
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 2A8

Download Ideal Coordinates CCD File 
C21 H18 N2 O
Binding Affinity Annotations 
IDSourceBinding Affinity
2A8 BindingDB:  3ZYA IC50: min: 50, max: 104 (nM) from 3 assay(s)
PDBBind:  3ZYA IC50: 100 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.172 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.155α = 90
b = 51.863β = 90
c = 167.881γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-12-28
    Type: Initial release
  • Version 1.1: 2012-02-01
    Changes: Other
  • Version 1.2: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description