3S3K

Crystal structure of the catalytic domain of PTP10D from Drosophila melanogaster with a small molecular inhibitor para-NitroCatechol Sulphate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.253 
  • R-Value Observed: 0.256 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Conformational basis for substrate recruitment in protein tyrosine phosphatase 10D

Madan, L.L.Gopal, B.

(2011) Biochemistry 50: 10114-10125

  • DOI: 10.1021/bi201092q
  • Primary Citation of Related Structures:  
    3S3K, 3S3E, 3S3F, 3S3H

  • PubMed Abstract: 
  • The coordinated activity of protein tyrosine phosphatases (PTPs) is crucial for the initiation, modulation, and termination of diverse cellular processes. The catalytic activity of this protein depends on a nucleophilic cysteine at the active site th ...

    The coordinated activity of protein tyrosine phosphatases (PTPs) is crucial for the initiation, modulation, and termination of diverse cellular processes. The catalytic activity of this protein depends on a nucleophilic cysteine at the active site that mediates the hydrolysis of the incoming phosphotyrosine substrate. While the role of conserved residues in the catalytic mechanism of PTPs has been extensively examined, the diversity in the mechanisms of substrate recognition and modulation of catalytic activity suggests that other, less conserved sequence and structural features could contribute to this process. Here we describe the crystal structures of Drosophila melanogaster PTP10D in the apo form as well as in a complex with a substrate peptide and an inhibitor. These studies reveal the role of aromatic ring stacking interactions at the boundary of the active site of PTPs in mediating substrate recruitment. We note that phenylalanine 76, of the so-called KNRY loop, is crucial for orienting the phosphotyrosine residue toward the nucleophilic cysteine. Mutation of phenylalanine 76 to leucine results in a 60-fold decrease in the catalytic efficiency of the enzyme. Fluorescence measurements with a competitive inhibitor, p-nitrocatechol sulfate, suggest that Phe76 also influences the formation of the enzyme-substrate intermediate. The structural and biochemical data for PTP10D thus highlight the role of relatively less conserved residues in PTP domains in both substrate recruitment and modulation of reaction kinetics.


    Organizational Affiliation

    Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560 012, India.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tyrosine-protein phosphatase 10DAB307Drosophila melanogasterMutation(s): 0 
Gene Names: CG1817Ptp10D
EC: 3.1.3.48
Find proteins for P35992 (Drosophila melanogaster)
Explore P35992 
Go to UniProtKB:  P35992
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CSN
Query on CSN

Download CCD File 
B
N,4-DIHYDROXY-N-OXO-3-(SULFOOXY)BENZENAMINIUM
C6 H5 N O7 S
XMCCOOONGGUOLA-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
CSNKd :  97690   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.253 
  • R-Value Observed: 0.256 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.51α = 90
b = 102.51β = 90
c = 172.8γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2011-05-18 
  • Released Date: 2011-11-02 
  • Deposition Author(s): Madan, L.L., Gopal, B.

Revision History 

  • Version 1.0: 2011-11-02
    Type: Initial release
  • Version 1.1: 2013-07-03
    Changes: Database references