3IQ7

Crystal Structure of human Haspin in complex with 5-Iodotubercidin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.1 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: 10.1073/pnas.0901989106
  • Structures With Same Primary Citation

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase haspin
A
357Homo sapiensMutation(s): 0 
Gene Names: GSG2HASPIN
EC: 2.7.11.1
Find proteins for Q8TF76 (Homo sapiens)
Go to UniProtKB:  Q8TF76
NIH Common Fund Data Resources
PHAROS  Q8TF76
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
5ID
Query on 5ID

Download CCD File 
A
(2R,3R,4S,5R)-2-(4-AMINO-5-IODO-7H-PYRROLO[2,3-D]PYRIMIDIN-7-YL)-5-(HYDROXYMETHYL)TETRAHYDROFURAN-3,4-DIOL
C11 H13 I N4 O4
WHSIXKUPQCKWBY-IOSLPCCCSA-N
 Ligand Interaction
IOD
Query on IOD

Download CCD File 
A
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
 Ligand Interaction
PO4
Query on PO4

Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
EDO
Query on EDO

Download CCD File 
A
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.034α = 90
b = 78.486β = 90
c = 87.048γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
CrystalCleardata collection
MOSFLMdata reduction

Structure Validation

View Full Validation Report



Entry History 

Revision History 

  • Version 1.0: 2009-09-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance