1WGI

STRUCTURE OF INORGANIC PYROPHOSPHATASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.172 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The structural basis for pyrophosphatase catalysis.

Heikinheimo, P.Lehtonen, J.Baykov, A.Lahti, R.Cooperman, B.S.Goldman, A.

(1996) Structure 4: 1491-1508

  • DOI: 10.1016/s0969-2126(96)00155-4
  • Primary Citation of Related Structures:  
    1WGJ, 1WGI

  • PubMed Abstract: 
  • Soluble inorganic pyrophosphatase (PPase), an essential enzyme central to phosphorus metabolism, catalyzes the hydrolysis of the phosphoanhydride bond in inorganic pyrophosphate. Catalysis requires divalent metal ions which affect the apparent pKas of the essential general acid and base on the enzyme, and the pKa of the substrate ...

    Soluble inorganic pyrophosphatase (PPase), an essential enzyme central to phosphorus metabolism, catalyzes the hydrolysis of the phosphoanhydride bond in inorganic pyrophosphate. Catalysis requires divalent metal ions which affect the apparent pKas of the essential general acid and base on the enzyme, and the pKa of the substrate. Three to five metal ions are required for maximal activity, depending on pH and enzyme source. A detailed understanding of catalysis would aid both in understanding the nature of biological mechanisms of phosphoryl transfer, and in understanding the role of divalent cations. Without a high-resolution complex structure such a model has previously been unobtainable.


    Related Citations: 
    • New Crystal Forms of E. Coli and S. Cerevisiae Soluble Inorganic Pyrophosphatases
      Heikinheimo, P., Salminen, T., Cooperman, B.S., Lahti, R., Goldman, A.
      (1995) Acta Crystallogr D Biol Crystallogr 51: 399

    Organizational Affiliation

    Turku Centre for Biotechnology, Finland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
INORGANIC PYROPHOSPHATASEA, B286Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: PPA1
EC: 3.6.1.1
UniProt
Find proteins for P00817 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P00817 
Go to UniProtKB:  P00817
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download Ideal Coordinates CCD File 
C [auth A], D [auth A], E [auth B], F [auth B]MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.172 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.3α = 90
b = 68.4β = 90
c = 161.9γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-11-19
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance