2B82

Crystal structure of AphA class B acid phosphatase/phosphotransferase ternary complex with adenosine and phosphate bound to the catalytic metal at 1.2 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.25 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.167 

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This is version 1.2 of the entry. See complete history


Literature

A structure-based proposal for the catalytic mechanism of the bacterial acid phosphatase AphA belonging to the DDDD superfamily of phosphohydrolases

Calderone, V.Forleo, C.Benvenuti, M.Thaller, M.C.Rossolini, G.M.Mangani, S.

(2006) J Mol Biol 355: 708-721

  • DOI: 10.1016/j.jmb.2005.10.068
  • Primary Citation of Related Structures:  
    2B82, 2B8J

  • PubMed Abstract: 
  • The Escherichia coli gene aphA codes for a periplasmic acid phosphatase called AphA, belonging to class B bacterial phosphatases, which is part of the DDDD superfamily of phosphohydrolases. After our first report about its crystal structure, we have started a series of crystallographic studies aimed at understanding of the catalytic mechanism of the enzyme ...

    The Escherichia coli gene aphA codes for a periplasmic acid phosphatase called AphA, belonging to class B bacterial phosphatases, which is part of the DDDD superfamily of phosphohydrolases. After our first report about its crystal structure, we have started a series of crystallographic studies aimed at understanding of the catalytic mechanism of the enzyme. Here, we report three crystal structures of the AphA enzyme in complex with the hydrolysis products of nucleoside monophosphate substrates and a fourth with a proposed intermediate analogue that appears to be covalently bound to the enzyme. Comparison with the native enzyme structure and with the available X-ray structures of different phosphatases provides clues about the enzyme chemistry and allows us to propose a catalytic mechanism for AphA, and to discuss it with respect to the mechanism of other bacterial and human phosphatases.


    Related Citations: 
    • Identification of the gene (aphA) encoding the class B acid phosphatase/phosphotransferase of Escherichia coli MG1655 and characterization of its product
      Thaller, M.C., Schippa, S., Bonci, A., Cresti, S., Rossolini, G.M.
      (1997) FEMS Microbiol Lett 146: 191
    • Expression, purification, crystallization and preliminary X-ray characterization of the class B acid phosphatase (AphA) from Escherichia coli
      Forleo, C., Benvenuti, M., Calderone, V., Schippa, S., Docquier, J.D., Thaller, M.C., Rossolini, G.M., Mangani, S.
      (2003) Acta Crystallogr D Biol Crystallogr 59: 1058

    Organizational Affiliation

    Dipartimento di Chimica, Università di Siena, Via Aldo Moro, I-53100 Siena, Italy.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
class B acid phosphataseA, B211Escherichia coliMutation(s): 0 
Gene Names: aphAnapA
EC: 3.1.3.2
UniProt
Find proteins for P0AE22 (Escherichia coli (strain K12))
Explore P0AE22 
Go to UniProtKB:  P0AE22
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.25 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.167 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.971α = 90
b = 66.868β = 116.96
c = 86.12γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing
REFMACrefinement
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-11-29
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance