Structure of dead kinase MAPK14

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.178 

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Architecture of the MKK6-p38 alpha complex defines the basis of MAPK specificity and activation.

Juyoux, P.Galdadas, I.Gobbo, D.von Velsen, J.Pelosse, M.Tully, M.Vadas, O.Gervasio, F.L.Pellegrini, E.Bowler, M.W.

(2023) Science 381: 1217-1225

  • DOI: https://doi.org/10.1126/science.add7859
  • Primary Citation of Related Structures:  
    5ETC, 5ETI, 8A8M

  • PubMed Abstract: 

    The mitogen-activated protein kinase (MAPK) p38α is a central component of signaling in inflammation and the immune response and is, therefore, an important drug target. Little is known about the molecular mechanism of its activation by double phosphorylation from MAPK kinases (MAP2Ks), because of the challenge of trapping a transient and dynamic heterokinase complex. We applied a multidisciplinary approach to generate a structural model of p38α in complex with its MAP2K, MKK6, and to understand the activation mechanism. Integrating cryo-electron microscopy with molecular dynamics simulations, hydrogen-deuterium exchange mass spectrometry, and experiments in cells, we demonstrate a dynamic, multistep phosphorylation mechanism, identify catalytically relevant interactions, and show that MAP2K-disordered amino termini determine pathway specificity. Our work captures a fundamental step of cell signaling: a kinase phosphorylating its downstream target kinase.

  • Organizational Affiliation

    European Molecular Biology Laboratory (EMBL), Grenoble, France.

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
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.178 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.418α = 90
b = 87.023β = 90
c = 122.921γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-01-20
    Type: Initial release
  • Version 1.1: 2023-09-27
    Changes: Data collection, Database references