1LL5

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


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


  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
beta-lactamase
A, B
358Escherichia coli (strain K12)Gene Names: ampC (ampA)
EC: 3.5.2.6
Find proteins for P00811 (Escherichia coli (strain K12))
Go to UniProtKB:  P00811
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IM2
Query on IM2
Download SDF File 
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-carboxylic acid
IMIPENEM, open form; N-FORMIMIDOYL-THIENAMYCINE, open form
C12 H19 N3 O4 S
UACUABDJLSUFFC-IWSPIJDZSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 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 = 90.00
b = 76.911β = 116.16
c = 98.009γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSphasing
SCALEPACKdata scaling
CNSrefinement

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

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