Biological Assembly 1  

 3D View: Structure

Global Symmetry: Dihedral - D3  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 1 assigned by authors and generated by PISA,PQS (software)

Macromolecule Content

• Total Structure Weight: 19.59 kDa 
• Atom Count: 1509 
• Modelled Residue Count: 175 
• Deposited Residue Count: 175 
• Unique protein chains: 1

1IGP

X-RAY CRYSTALLOGRAPHIC STUDIES OF RECOMBINANT INORGANIC PYROPHOSPHATASE FROM ESCHERICHIA COLI

• DOI: 10.2210/pdb1IGP/pdb

• Classification: ACID ANHYDRIDE HYDROLASE
• Organism(s): Escherichia coli
• Mutation(s): No 


• Deposited: 1994-08-01 Released: 1994-12-20 
• Deposition Author(s): Oganessyan, V.Yu., Avaeva, S.M., Harutyunyan, E.H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Observed: 0.220 

Literature

X-ray crystallographic studies of recombinant inorganic pyrophosphatase from Escherichia coli.

Oganessyan, V.Y.u., Kurilova, S.A., Vorobyeva, N.N., Nazarova, T.I., Popov, A.N., Lebedev, A.A., Avaeva, S.M., Harutyunyan, E.H.

(1994) FEBS Lett 348: 301-304

• PubMed: 8034059 
• DOI: 10.1016/0014-5793(94)00605-9
• Primary Citation of Related Structures:  
  1IGP


• PubMed Abstract: 
  

An E. coli inorganic pyrophosphatase overproducer and a method for a large-scale production of the homogeneous enzyme are described. The inorganic pyrophosphatase was crystallized in the form containing one subunit of a homohexameric molecule per asymmetric unit: space group R32, a = 110.4 A, c = 76.8 A. The electron density map to 2.5 A resolution phased with Eu- and Hg-derivatives (figure of merit, = 0.51) was improved by the solvent flattening procedure ( = 0.77). The course of the polypeptide chain and the secondary structure elements, intersubunit contacts and positions of the active sites were characterized. Homology with S. cerevisiae inorganic pyrophosphatase structure was found.

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Related Citations: 

• Crystal Structure of Ferric Complex of the Yellow Lupin Leghemoglobin with Isoquinoline at 1.8 Angstroms Resolution
  Safonova, T.N., Teplyakov, A.V., Obmolova, G.V., Popov, A.N., Kuranova, I.P., Harutyunyan, E.G.
  (1991) Bioorg Khim 17: 1605

• X-Ray Structure of Ferrous Complexes of the Yellow Lupin Leghemoglobin with Co and No at 1.8 Angstroms Resolution
  Obmolova, G.V., Safonova, T.N., Teplyakov, A.V., Popov, A.N., Kuranova, I.P., Harutyunyan, E.G., Vainshtein, B.K.
  (1988) Bioorg Khim 14: 1509

• Cloning and Characterization of the Gene Encoding Inorganic Pyrophosphatase of Escherichia Coli K 12
  Lahti, R., Pitkaranta, T., Valve, E., Ilta, I., Kukko-Kalske, E., Heinonen, J.
  (1988) Z Angew Math Phys 170: 5901

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Organizational Affiliation: 

Institute of Crystallography, Russian Academy of Sciences, Moscow.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
INORGANIC PYROPHOSPHATASE	A	175	Escherichia coli	Mutation(s): 0  EC: 3.6.1.1
Find proteins for P0A7A9 (Escherichia coli (strain K12)) Explore P0A7A9  Go to UniProtKB:  P0A7A9

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Observed: 0.220 
• Space Group: H 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 110.4	α = 90
b = 110.4	β = 90
c = 76.8	γ = 120

Software Package:

Software Name	Purpose
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1994-08-01 
• Released Date: 1994-12-20 
Deposition Author(s): Oganessyan, V.Yu., Avaeva, S.M., Harutyunyan, E.H.

Revision History  

• Version 1.0: 1994-12-20
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance