2A7M: 1.6 Angstrom Resolution Structure Of The Quorum-Quenching N-Acyl Homoserine Lactone Hydrolase Of Bacillus Thuringiensis

Citation:
Abstract
The three-dimensional structure of the N-acyl-l-homoserine lactone hydrolase (AHL lactonase) from Bacillus thuringiensis has been determined, by using single-wavelength anomalous dispersion (SAD) phasing, to 1.6-angstroms resolution. AHLs are produced by many Gram-negative bacteria as signaling molecules used in quorum-sensing pathways that indirectly sense cell density and regulate communal behavior. Because of their importance in pathogenicity, quorum-sensing pathways have been suggested as potential targets for the development of novel therapeutics. Quorum-sensing can be disrupted by enzymes evolved to degrade these lactones, such as AHL lactonases. These enzymes are members of the metallo-beta-lactamase superfamily and contain two zinc ions in their active sites. The zinc ions are coordinated to a number of ligands, including a single oxygen of a bridging carboxylate and a bridging water/hydroxide ion, thought to be the nucleophile that hydrolyzes the AHLs to ring-opened products, which can no longer act as quorum signals.
PDB ID: 2A7MDownload
MMDB ID: 34813
PDB Deposition Date: 2005/7/5
Updated in MMDB: 2012/12
Experimental Method:
x-ray diffraction
Resolution: 1.6  Å
Source Organism:
Similar Structures:
Biological Unit for 2A7M: monomeric; determined by author
Molecular Components in 2A7M
Label Count Molecule
Protein (1 molecule)
1
N-acyl Homoserine Lactone Hydrolase
Molecule annotation
Chemicals (10 molecules)
1
2
2
8
* Click molecule labels to explore molecular sequence information.

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