3F41

Structure of the tandemly repeated protein tyrosine phosphatase like phytase from Mitsuokella multacida


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.230 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural analysis of a multifunctional, tandemly repeated inositol polyphosphatase.

Gruninger, R.J.Selinger, L.B.Mosimann, S.C.

(2009) J Mol Biol 392: 75-86

  • DOI: 10.1016/j.jmb.2009.05.079
  • Primary Citation of Related Structures:  
    3F41

  • PubMed Abstract: 
  • Mitsuokella multacida expresses a unique inositol polyphosphatase (PhyAmm) that is composed of tandem repeats (TRs). Each repeat possesses a protein tyrosine phosphatase (PTP) active-site signature sequence and fold. Using a combination of structural, mutational, and kinetic studies, we show that the N-terminal (D1) and C-terminal (D2) active sites of the TR have diverged and possess significantly different specificities for inositol polyphosphate ...

    Mitsuokella multacida expresses a unique inositol polyphosphatase (PhyAmm) that is composed of tandem repeats (TRs). Each repeat possesses a protein tyrosine phosphatase (PTP) active-site signature sequence and fold. Using a combination of structural, mutational, and kinetic studies, we show that the N-terminal (D1) and C-terminal (D2) active sites of the TR have diverged and possess significantly different specificities for inositol polyphosphate. Structural analysis and molecular docking calculations identify steric and electrostatic differences within the substrate binding pocket of each TR that may be involved in the altered substrate specificity. The implications of our results for the biological function of related PTP-like phytases are discussed. Finally, the structures and activities of PhyAmm and tandemly repeated receptor PTPs are compared and discussed. To our knowledge, this is the first example of an inositol phosphatase with tandem PTP domains possessing substrate specificity for different inositol phosphates.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Lethbridge, Alberta, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PhytaseA, B629Mitsuokella multacidaMutation(s): 0 
Gene Names: phyAphyAmm
EC: 3.1.3.8
UniProt
Find proteins for A3QMF6 (Mitsuokella multacida)
Explore A3QMF6 
Go to UniProtKB:  A3QMF6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA3QMF6
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.230 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.391α = 90
b = 73.304β = 93.71
c = 161.31γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
SOLVEphasing
RESOLVEphasing
CNSrefinement
PDB_EXTRACTdata extraction
ADSCdata collection

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-06-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance