2V3Z

Glu383Ala Escherichia coli aminopeptidase P in complex with substrate

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.56 Å
  • R-Value Free: 0.150 
  • R-Value Work: 0.140 
  • R-Value Observed: 0.140 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Complexes of Mutants of Escherichia Coli Aminopeptidase P and the Tripeptide Substrate Valproleu.

Graham, S.C., Guss, J.M.

(2008) Arch Biochem Biophys 469: 200

  • DOI: 10.1016/j.abb.2007.10.009
  • Primary Citation of Related Structures:  
    2V3X, 2V3Y, 2V3Z

  • PubMed Abstract: 

    • Aminopeptidase P (APPro) is a manganese-containing enzyme that catalyses the hydrolysis of the N-terminal residue of a polypeptide if the second residue is proline. Structures of APPro mutants with reduced or negligible activity have been determined in complex with the tripeptide substrate ValProLeu ...

    Aminopeptidase P (APPro) is a manganese-containing enzyme that catalyses the hydrolysis of the N-terminal residue of a polypeptide if the second residue is proline. Structures of APPro mutants with reduced or negligible activity have been determined in complex with the tripeptide substrate ValProLeu. In the complex of Glu383Ala APPro with ValProLeu one of the two metal sites is only partly occupied, indicating an essential role for Glu383 in metal binding in the presence of substrate. His361Ala APPro clearly possesses residual activity as the ValProLeu substrate has been cleaved in the crystals; difference electron density consistent with bound ProLeu dipeptide and a disordered Val amino acid is present at the active site. Contrary to previous suggestions, the His243Ala mutant is capable of binding substrate. The structure of the His243Ala APPro complex with ValProLeu shows that the peptide interacts with one of the active-site metal atoms via its terminal amino group. The implications of these complexes for the roles of the respective residues in APPro catalysis are discussed.

    Organizational Affiliation: 

    Division of Structural Biology, The Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
XAA-PRO AMINOPEPTIDASEA440Escherichia coliMutation(s): 1 
EC: 3.4.11.9
UniProt
Find proteins for P15034 (Escherichia coli (strain K12))
Explore P15034 
Go to UniProtKB:  P15034
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TRIPEPTIDE (VALINE-PROLINE-LEUCINE)B3Escherichia coliMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN
Download Ideal Coordinates CCD File 
 C [auth A], D [auth A]MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N		 Ligand Interaction
CL
Query on CL
Download Ideal Coordinates CCD File 
 E [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO		AL-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.56 Å
  • R-Value Free: 0.150 
  • R-Value Work: 0.140 
  • R-Value Observed: 0.140 
  • Space Group: P 64 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 177.695α = 90
b = 177.695β = 90
c = 96.433γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
REFMACphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-11-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2019-03-06
    Changes: Data collection, Derived calculations, Experimental preparation, Other
  • Version 1.3: 2019-09-25
    Changes: Data collection, Experimental preparation