1A16

AMINOPEPTIDASE P FROM E. COLI WITH THE INHIBITOR PRO-LEU

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.184 

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This is version 1.2 of the entry. See complete history. 


Literature

Structure and mechanism of a proline-specific aminopeptidase from Escherichia coli.

Wilce, M.C., Bond, C.S., Dixon, N.E., Freeman, H.C., Guss, J.M., Lilley, P.E., Wilce, J.A.

(1998) Proc Natl Acad Sci U S A 95: 3472-3477

  • DOI: 10.1073/pnas.95.7.3472
  • Primary Citation of Related Structures:  
    1JAW, 1A16

  • PubMed Abstract: 

    • The structure of the proline-specific aminopeptidase (EC 3.4.11.9) from Escherichia coli has been solved and refined for crystals of the native enzyme at a 2.0-A resolution, for a dipeptide-inhibited complex at 2.3-A resolution, and for a low-pH inac ...

    The structure of the proline-specific aminopeptidase (EC 3.4.11.9) from Escherichia coli has been solved and refined for crystals of the native enzyme at a 2.0-A resolution, for a dipeptide-inhibited complex at 2.3-A resolution, and for a low-pH inactive form at 2.7-A resolution. The protein crystallizes as a tetramer, more correctly a dimer of dimers, at both high and low pH, consistent with observations from analytical ultracentrifuge studies that show that the protein is a tetramer under physiological conditions. The monomer folds into two domains. The active site, in the larger C-terminal domain, contains a dinuclear manganese center in which a bridging water molecule or hydroxide ion appears poised to act as the nucleophile in the attack on the scissile peptide bond of Xaa-Pro. The metal-binding residues are located in a single subunit, but the residues surrounding the active site are contributed by three subunits. The fold of the protein resembles that of creatine amidinohydrolase (creatinase, not a metalloenzyme). The C-terminal catalytic domain is also similar to the single-domain enzyme methionine aminopeptidase that has a dinuclear cobalt center.

    Organizational Affiliation: 

    Department of Biochemistry, University of Sydney, New South Wales 2006, Australia.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AMINOPEPTIDASE PA440Escherichia coliMutation(s): 0 
EC: 3.4.11.9
Find proteins for P15034 (Escherichia coli (strain K12))
Explore P15034 
Go to UniProtKB:  P15034
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
LEU
Query on LEU
Download CCD File 
A
LEUCINE
C6 H13 N O2
ROHFNLRQFUQHCH-YFKPBYRVSA-N		 Ligand Interaction
PRO
Query on PRO
Download CCD File 
A
PROLINE
C5 H9 N O2
ONIBWKKTOPOVIA-BYPYZUCNSA-N		 Ligand Interaction
MN
Query on MN
Download CCD File 
A
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.184 
  • Space Group: P 64 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 177.3α = 90
b = 177.3β = 90
c = 96.5γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-04-06
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance