Crystal structure of Human STE20-like kinase bound to 5-Amino-3-((4-(aminosulfonyl)phenyl)amino) -N-(2,6-difluorophenyl)-1H-1,2,4-triazole- 1-carbothioamide

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.202 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Activation Segment Dimerization: A Mechanism for Kinase Autophosphorylation of Non-Consensus Sites.

Pike, A.C.W.Rellos, P.Niesen, F.H.Turnbull, A.Oliver, A.W.Parker, S.A.Turk, B.E.Pearl, L.H.Knapp, S.

(2008) EMBO J 27: 704

  • DOI: https://doi.org/10.1038/emboj.2008.8
  • Primary Citation of Related Structures:  
    2J51, 2J7T, 2J90, 2JFL, 2JFM, 2UV2

  • PubMed Abstract: 

    Protein kinase autophosphorylation of activation segment residues is a common regulatory mechanism in phosphorylation-dependent signalling cascades. However, the molecular mechanisms that guarantee specific and efficient phosphorylation of these sites have not been elucidated. Here, we report on three novel and diverse protein kinase structures that reveal an exchanged activation segment conformation. This dimeric arrangement results in an active kinase conformation in trans, with activation segment phosphorylation sites in close proximity to the active site of the interacting protomer. Analytical ultracentrifugation and chemical cross-linking confirmed the presence of dimers in solution. Consensus substrate sequences for each kinase showed that the identified activation segment autophosphorylation sites are non-consensus substrate sites. Based on the presented structural and functional data, a model for specific activation segment phosphorylation at non-consensus substrate sites is proposed that is likely to be common to other kinases from diverse subfamilies.

  • Organizational Affiliation

    Structural Genomics Consortium, Botnar Research Centre, University of Oxford, Oxford, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H2G2 (Homo sapiens)
Explore Q9H2G2 
Go to UniProtKB:  Q9H2G2
GTEx:  ENSG00000065613 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9H2G2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.202 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.195α = 90
b = 101.195β = 90
c = 177.173γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report

Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2006-10-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2023-12-13
    Changes: Data collection, Database references, Other, Refinement description