1LL5

X-ray crystal structure of AmpC WT beta-lactamase in complex with covalently bound imipenem

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.205 

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


Literature

Structural Basis for Imipenem Inhibition of Class C beta-lactamases

Beadle, B.M., Shoichet, B.K.

(2002) Antimicrob Agents Chemother 46: 3978-3980

  • DOI: 10.1128/aac.46.12.3978-3980.2002
  • Primary Citation of Related Structures:  
    1LL5

  • PubMed Abstract: 

    • To determine how imipenem inhibits the class C beta-lactamase AmpC, the X-ray crystal structure of the acyl-enzyme complex was determined to a resolution of 1.80 A. In the complex, the lactam carbonyl oxygen of imipenem has flipped by approximately 1 ...

    To determine how imipenem inhibits the class C beta-lactamase AmpC, the X-ray crystal structure of the acyl-enzyme complex was determined to a resolution of 1.80 A. In the complex, the lactam carbonyl oxygen of imipenem has flipped by approximately 180 degrees compared to its expected position; the electrophilic acyl center is thus displaced from the point of hydrolytic attack. This conformation resembles that of imipenem bound to the class A enzyme TEM-1 but is different from that of moxalactam bound to AmpC.

    Organizational Affiliation: 

    Department of Molecular Pharmacology and Biological Chemistry, Northwestern University, Chicago, Illinois 60611-3008, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
beta-lactamaseA, B358Escherichia coliMutation(s): 0 
Gene Names: K12
EC: 3.5.2.6
Find proteins for P00811 (Escherichia coli (strain K12))
Explore P00811 
Go to UniProtKB:  P00811
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IM2
Query on IM2
Download CCD File 
A, B
(5R)-5-[(1S,2R)-1-formyl-2-hydroxypropyl]-3-[(2-{[(E)-iminomethyl]amino}ethyl)sulfanyl]-4,5-dihydro-1H-pyrrole-2-carbox ylic acid
C12 H19 N3 O4 S
UACUABDJLSUFFC-IWSPIJDZSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.205 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 118.457α = 90
b = 76.911β = 116.16
c = 98.009γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-11-27
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2011-08-31
    Changes: Other