4GS0

Crystal structure of SHP1 catalytic domain with JAK1 activation loop peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7961 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.162 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure-guided studies of the SHP-1/JAK1 interaction provide new insights into phosphatase catalytic domain substrate recognition.

Alicea-Velazquez, N.L.Jakoncic, J.Boggon, T.J.

(2013) J.Struct.Biol. 181: 243-251

  • DOI: 10.1016/j.jsb.2012.12.009
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • SHP-1 (PTPN6) is a member of the SHP sub-family of protein tyrosine phosphatases and plays a critical role in the regulation of the JAK/STAT signaling pathway. Previous studies suggested that SHP-1 contains a PTP1B-like second phosphotyrosine pocket ...

    SHP-1 (PTPN6) is a member of the SHP sub-family of protein tyrosine phosphatases and plays a critical role in the regulation of the JAK/STAT signaling pathway. Previous studies suggested that SHP-1 contains a PTP1B-like second phosphotyrosine pocket that allows for binding of tandem phosphotyrosine residues, such as those found in the activation loop of JAK kinases. To discover the structural nature of the interaction between SHP-1 and the JAK family member, JAK1, we determined the 1.8Å co-crystal structure of the SHP-1 catalytic domain and a JAK1-derived substrate peptide. This structure reveals electron density for only one bound phosphotyrosine residue. To investigate the role of the predicted second site pocket we determined the structures of SHP-1 in complex with phosphate and sulfate to 1.37Å and 1.7Å, respectively, and performed anomalous scattering experiments for a selenate-soaked crystal. These crystallographic data suggest that SHP-1 does not contain a PTP1B-like second site pocket. This conclusion is further supported by analysis of the relative dephosphorylation and binding affinities of mono- and tandem-phosphorylated peptide substrates. The crystal structures instead indicate that SHP-1 contains an extended C-terminal helix α2' incompatible with the predicted second phosphotyrosine binding site. This study suggests that SHP-1 defines a new category of PTP1B-like protein tyrosine phosphatases with a hindered second phosphotyrosine pocket.


    Organizational Affiliation

    Department of Pharmacology, Yale University School of Medicine, 333 Cedar Street, New Haven, CT 06520, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosine-protein phosphatase non-receptor type 6
A, B
308Homo sapiensMutation(s): 0 
Gene Names: PTPN6 (HCP, PTP1C)
EC: 3.1.3.48
Find proteins for P29350 (Homo sapiens)
Go to Gene View: PTPN6
Go to UniProtKB:  P29350
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Tyrosine-protein kinase JAK1
C
4N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
FTY
Query on FTY
C
L-PEPTIDE LINKINGC10 H12 F2 N O5 PTYR
UNK
Query on UNK
C
L-PEPTIDE LINKINGC4 H9 N O2

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7961 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.162 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 43.935α = 90.00
b = 43.935β = 90.00
c = 258.112γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXrefinement
HKL-2000data reduction
PHASERphasing
EXECUTORdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-19
    Type: Initial release
  • Version 1.1: 2013-01-23
    Type: Database references
  • Version 1.2: 2013-03-06
    Type: Database references