2HW4

Crystal structure of human phosphohistidine phosphatase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

First structure of a eukaryotic phosphohistidine phosphatase

Busam, R.D.Thorsell, A.G.Flores, A.Persson, C.Hallberg, B.M.

(2006) J Biol Chem 281: 33830-33834

  • DOI: 10.1074/jbc.C600231200
  • Primary Citation of Related Structures:  
    2HW4

  • PubMed Abstract: 
  • Phosphatases are a diverse group of enzymes that regulate numerous cellular processes. Much of what is known relates to the tyrosine, threonine, and serine phosphatases, whereas the histidine phosphatases have not been studied as much. The structure of phosphohistidine phosphatase (PHPT1), the first identified eukaryotic-protein histidine phosphatase, has been determined to a resolution of 1 ...

    Phosphatases are a diverse group of enzymes that regulate numerous cellular processes. Much of what is known relates to the tyrosine, threonine, and serine phosphatases, whereas the histidine phosphatases have not been studied as much. The structure of phosphohistidine phosphatase (PHPT1), the first identified eukaryotic-protein histidine phosphatase, has been determined to a resolution of 1.9A using multiple-wavelength anomalous dispersion methods. This enzyme can dephosphorylate a variety of proteins (e.g. ATP-citrate lyase and the beta-subunit of G proteins). A putative active site has been identified by its electrostatic character, ion binding, and conserved protein residues. Histidine 53 is proposed to play a major role in histidine dephosphorylation based on these observations and previous mutational studies. Models of peptide binding are discussed to suggest possible mechanisms for substrate recognition.


    Organizational Affiliation

    Structural Genomics Consortium, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-17177 Stockholm, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
14 kDa phosphohistidine phosphataseA144Homo sapiensMutation(s): 0 
Gene Names: PHPT1PHP14CGI-202HSPC141
EC: 3.1.3 (PDB Primary Data), 3.9.1.3 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NRX4 (Homo sapiens)
Explore Q9NRX4 
Go to UniProtKB:  Q9NRX4
GTEx:  ENSG00000054148 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NRX4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 112.53α = 90
b = 112.53β = 90
c = 29.37γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
SHARPphasing

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2006-08-29
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance