Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 79778.57 
• Atom Count: 5569 
• Residue Count: 716 
• Unique protein chains: 1

1LL5

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

• DOI: 10.2210/pdb1LL5/pdb

• Classification: HYDROLASE
• Organism(s): Escherichia coli (strain K12)
• Expression System: Escherichia coli


• Deposited: 2002-04-26 Released: 2002-11-27 
• Deposition Author(s): Beadle, B.M., Shoichet, B.K.

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Experimental Data Snapshot

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

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: 12435704 
• DOI: 10.1128/aac.46.12.3978-3980.2002


• 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 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.

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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
Molecule	Chains	Sequence Length	Organism	Details
beta-lactamase	A, B	358	Escherichia coli (strain K12)	Mutation(s): 0  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
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
IM2	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

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 = 118.457	α = 90.00
b = 76.911	β = 116.16
c = 98.009	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
CNS	phasing
SCALEPACK	data scaling
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-04-26 
• Released Date: 2002-11-27 
• Deposition Author(s): Beadle, B.M., Shoichet, B.K.

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