3DHA

An Ultral High Resolution Structure of N-Acyl Homoserine Lactone Hydrolase with the Product N-Hexanoyl-L-Homoserine Bound at An Alternative Site


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.95 Å
  • R-Value Free: 0.169 
  • R-Value Work: 0.133 
  • R-Value Observed: 0.133 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Mechanism of the quorum-quenching lactonase (AiiA) from Bacillus thuringiensis. 1. Product-bound structures.

Liu, D.Momb, J.Thomas, P.W.Moulin, A.Petsko, G.A.Fast, W.Ringe, D.

(2008) Biochemistry 47: 7706-7714

  • DOI: 10.1021/bi800368y
  • Primary Citation of Related Structures:  
    3DHA, 3DHB, 3DHC

  • PubMed Abstract: 
  • Enzymes capable of hydrolyzing N-acyl- l-homoserine lactones (AHLs) used in some bacterial quorum-sensing pathways are of considerable interest for their ability to block undesirable phenotypes. Most known AHL hydrolases that catalyze ring opening (AHL lactonases) are members of the metallo-beta-lactamase enzyme superfamily and rely on a dinuclear zinc site for catalysis and stability ...

    Enzymes capable of hydrolyzing N-acyl- l-homoserine lactones (AHLs) used in some bacterial quorum-sensing pathways are of considerable interest for their ability to block undesirable phenotypes. Most known AHL hydrolases that catalyze ring opening (AHL lactonases) are members of the metallo-beta-lactamase enzyme superfamily and rely on a dinuclear zinc site for catalysis and stability. Here we report the three-dimensional structures of three product complexes formed with the AHL lactonase from Bacillus thuringiensis. Structures of the lactonase bound with two different concentrations of the ring-opened product of N-hexanoyl- l-homoserine lactone are determined at 0.95 and 1.4 A resolution and exhibit different product configurations. A structure of the ring-opened product of the non-natural N-hexanoyl- l-homocysteine thiolactone at 1.3 A resolution is also determined. On the basis of these product-bound structures, a substrate-binding model is presented that differs from previous proposals. Additionally, the proximity of the product to active-site residues and observed changes in protein conformation and metal coordination provide insight into the catalytic mechanism of this quorum-quenching metalloenzyme.


    Related Citations: 
    • Mechanism of the Quorum-quenching Lactonase (AiiA) from Bacillus thuringensis: 2. Substrate Modeling and Active Site Mutations
      Momb, J., Wang, C., Liu, D., Thomas, P.W., Petsko, G.A., Guo, H., Ringe, D., Fast, W.
      () To be published --: --

    Organizational Affiliation

    Department of Chemistry, Brandeis University, Waltham, Massachusetts 02454-9110, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
N-Acyl Homoserine Lactone HydrolaseA254Bacillus thuringiensis serovar kurstakiMutation(s): 0 
Gene Names: aiiA
EC: 3.1.1 (PDB Primary Data), 3.1.1.81 (UniProt)
Find proteins for P0CJ63 (Bacillus thuringiensis subsp. kurstaki)
Explore P0CJ63 
Go to UniProtKB:  P0CJ63
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.95 Å
  • R-Value Free: 0.169 
  • R-Value Work: 0.133 
  • R-Value Observed: 0.133 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.929α = 90
b = 55.604β = 90
c = 78.703γ = 90
Software Package:
Software NamePurpose
SHELXmodel building
SHELXL-97refinement
Blu-Icedata collection
HKL-2000data reduction
SCALEPACKdata scaling
SHELXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-07-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description