4WBG

Crystal structure of class C beta-lactamase Mox-1 covalently complexed with aztorenam

• PDB DOI: https://doi.org/10.2210/pdb4WBG/pdb

• Classification: HYDROLASE
• Organism(s): Klebsiella pneumoniae
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2014-09-03 Released: 2015-07-01 
• Deposition Author(s): Oguri, T., Shimizu-ibuka, A., Ishii, Y.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.214 
• R-Value Work: 0.175 
• R-Value Observed: 0.177 

Literature

Conformational Change Observed in the Active Site of Class C beta-Lactamase MOX-1 upon Binding to Aztreonam

Oguri, T., Ishii, Y., Shimizu-Ibuka, A.

(2015) Antimicrob Agents Chemother 59: 5069-5072

• PubMed: 26055361 
• DOI: https://doi.org/10.1128/AAC.04428-14
• Primary Citation of Related Structures:  
  4WBG


• PubMed Abstract: 
  

  We solved the crystal structure of the class C β-lactamase MOX-1 complexed with the inhibitor aztreonam at 1.9Å resolution. The main-chain oxygen of Ser315 interacts with the amide nitrogen of aztreonam. Surprisingly, compared to that in the structure of free MOX-1, this main-chain carboxyl changes its position significantly upon binding to aztreonam. This result indicates that the interaction between MOX-1 and β-lactams can be accompanied by conformational changes in the B3 β-strand main chain.

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Organizational Affiliation: 

Department of Science, Yamagata University, Yamagata, Japan.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 41.66 kDa 
• Atom Count: 2,836 
• Modelled Residue Count: 347 
• Deposited Residue Count: 380 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-lactamase	A	380	Klebsiella pneumoniae	Mutation(s): 0  Gene Names: blaMOX-1 EC: 3.5.2.6
UniProt
Find proteins for Q51578 (Klebsiella pneumoniae) Explore Q51578  Go to UniProtKB:  Q51578

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
AZR	B [auth A]	2-({[(1Z)-1-(2-amino-1,3-thiazol-4-yl)-2-oxo-2-{[(2S,3S)-1-oxo-3-(sulfoamino)butan-2-yl]amino}ethylidene]amino}oxy)-2-methylpropanoic acid C13 H19 N5 O8 S2 OEVQTUTXOVDNJO-GEEOIBTQSA-N
ZN	C [auth A], D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
ACT	J [auth A], K [auth A], L [auth A]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.214 
• R-Value Work: 0.175 
• R-Value Observed: 0.177 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 49.54	α = 90
b = 59.25	β = 102.72
c = 62.48	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-07-01 
Deposition Author(s): Oguri, T., Shimizu-ibuka, A., Ishii, Y.

Revision History  

• Version 1.0: 2015-07-01
  Type: Initial release
  
• Version 1.1: 2015-08-05
  Changes: Database references
• Version 1.2: 2020-01-29
  Changes: Data collection, Database references, Derived calculations
• Version 1.3: 2024-10-23
  Changes: Data collection, Database references, Derived calculations, Structure summary