3DLZ

Crystal structure of human haspin in complex with AMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.167 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Structure and functional characterization of the atypical human kinase haspin.

Eswaran, J.Patnaik, D.Filippakopoulos, P.Wang, F.Stein, R.L.Murray, J.W.Higgins, J.M.Knapp, S.

(2009) Proc Natl Acad Sci U S A 106: 20198-20203

  • DOI: https://doi.org/10.1073/pnas.0901989106
  • Primary Citation of Related Structures:  
    2VUW, 3DLZ, 3IQ7

  • PubMed Abstract: 

    The protein kinase haspin/Gsg2 plays an important role in mitosis, where it specifically phosphorylates Thr-3 in histone H3 (H3T3). Its protein sequence is only weakly homologous to other protein kinases and lacks the highly conserved motifs normally required for kinase activity. Here we report structures of human haspin in complex with ATP and the inhibitor iodotubercidin. These structures reveal a constitutively active kinase conformation, stabilized by haspin-specific inserts. Haspin also has a highly atypical activation segment well adapted for specific recognition of the basic histone tail. Despite the lack of a DFG motif, ATP binding to haspin is similar to that in classical kinases; however, the ATP gamma-phosphate forms hydrogen bonds with the conserved catalytic loop residues Asp-649 and His-651, and a His651Ala haspin mutant is inactive, suggesting a direct role for the catalytic loop in ATP recognition. Enzyme kinetic data show that haspin phosphorylates substrate peptides through a rapid equilibrium random mechanism. A detailed analysis of histone modifications in the neighborhood of H3T3 reveals that increasing methylation at Lys-4 (H3K4) strongly decreases substrate recognition, suggesting a key role of H3K4 methylation in the regulation of haspin activity.


  • Organizational Affiliation

    Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7DQ, United Kingdom. jeyanthy.eswaran@sgc.ox.ac.uk


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine/threonine-protein kinase haspin357Homo sapiensMutation(s): 0 
Gene Names: GSG2
EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for Q8TF76 (Homo sapiens)
Explore Q8TF76 
Go to UniProtKB:  Q8TF76
PHAROS:  Q8TF76
GTEx:  ENSG00000177602 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8TF76
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.167 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.315α = 90
b = 49.729β = 90
c = 98.009γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
CrystalCleardata collection
MOSFLMdata reduction

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2008-07-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2018-01-31
    Changes: Structure summary
  • Version 1.3: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description