1WCF

1.54 A CRYSTAL STRUCTURE OF RV3628, MYCOBACTERIUM TUBERCULOSIS INORGANIC PYROPHOSPHATASE (PPASE) AT PH7.0


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.170 
  • R-Value Work: 0.156 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of the Mycobacterium Tuberculosis Soluble Inorganic Pyrophosphatase Rv3628 at Ph 7.0.

Benini, S.Wilson, K.S.

(2011) Acta Crystallogr.,Sect.F 67: 866

  • DOI: 10.1107/S1744309111023323

  • PubMed Abstract: 
  • The 1.5 Å resolution crystal structure of the Mycobacterium tuberculosis soluble inorganic pyrophosphatase Rv3628 at pH 7.0 is reported. The M. tuberculosis and M. leprae genomes include genes for the only two family I inorganic pyrophosphatases know ...

    The 1.5 Å resolution crystal structure of the Mycobacterium tuberculosis soluble inorganic pyrophosphatase Rv3628 at pH 7.0 is reported. The M. tuberculosis and M. leprae genomes include genes for the only two family I inorganic pyrophosphatases known to contain two histidines in the active site. The role of these two residues in catalysis is not fully understood. Mutational and functional studies of the M. tuberculosis enzyme showed that His21 and His86 are not essential for pyrophosphate hydrolysis, but are responsible for a shift in the optimal pH for the reaction compared with the Escherichia coli enzyme. Comparison with the structure previously reported at pH 5.0 provides further insight into the role of the two histidines. Two potassium-binding sites are found as a result of the high potassium concentration in the mother liquor.


    Organizational Affiliation

    Faculty of Science and Technology, Free University of Bolzano, Bolzano, Italy. stefano.benini@unibz.it




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INORGANIC PYROPHOSPHATASE
A
171Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 0 
Gene Names: ppa
EC: 3.6.1.1
Find proteins for P9WI55 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WI55
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
A
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.170 
  • R-Value Work: 0.156 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 96.902α = 90.00
b = 96.902β = 90.00
c = 103.312γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
AMoREphasing
DENZOdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-07-12
    Type: Initial release
  • Version 1.1: 2011-08-17
    Type: Atomic model, Database references, Derived calculations, Non-polymer description, Other, Structure summary, Version format compliance