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3dhb

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Revision as of 08:49, 25 October 2017

1.4 Angstrom Structure of N-Acyl Homoserine Lactone Hydrolase with the Product N-Hexanoyl-L-Homoserine Bound at The Catalytic Metal Center

Structural highlights

3dhb is a 1 chain structure with sequence from Bactk. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	2a7m, 2r2d, 3dha, 3dhc
Gene:	aiiA (BACTK)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[AHLLA_BACTK] Catalyzes hydrolysis of N-hexanoyl-(S)-homoserine lactone, but not the R-enantiomer. Hydrolyzes short- and long-chain N-acyl homoserine lactones with or without 3-oxo substitution at C3, has maximum activity on C10-AHL.^[1]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

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.

Mechanism of the quorum-quenching lactonase (AiiA) from Bacillus thuringiensis. 1. Product-bound structures.,Liu D, Momb J, Thomas PW, Moulin A, Petsko GA, Fast W, Ringe D Biochemistry. 2008 Jul 22;47(29):7706-14. PMID:18627129^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Kim MH, Choi WC, Kang HO, Lee JS, Kang BS, Kim KJ, Derewenda ZS, Oh TK, Lee CH, Lee JK. The molecular structure and catalytic mechanism of a quorum-quenching N-acyl-L-homoserine lactone hydrolase. Proc Natl Acad Sci U S A. 2005 Dec 6;102(49):17606-11. Epub 2005 Nov 28. PMID:16314577
↑ Liu D, Momb J, Thomas PW, Moulin A, Petsko GA, Fast W, Ringe D. Mechanism of the quorum-quenching lactonase (AiiA) from Bacillus thuringiensis. 1. Product-bound structures. Biochemistry. 2008 Jul 22;47(29):7706-14. PMID:18627129 doi:10.1021/bi800368y

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3dhb"

@@ Line 1: / Line 1: @@
 ==1.4 Angstrom Structure of N-Acyl Homoserine Lactone Hydrolase with the Product N-Hexanoyl-L-Homoserine Bound at The Catalytic Metal Center==
 <StructureSection load='3dhb' size='340' side='right' caption='[[3dhb]], [[Resolution|resolution]] 1.40&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2a7m|2a7m]], [[2r2d|2r2d]], [[3dha|3dha]], [[3dhc|3dhc]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">aiiA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=29339 BACTK])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3dhb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3dhb OCA], [http://pdbe.org/3dhb PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3dhb RCSB], [http://www.ebi.ac.uk/pdbsum/3dhb PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3dhb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3dhb OCA], [http://pdbe.org/3dhb PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3dhb RCSB], [http://www.ebi.ac.uk/pdbsum/3dhb PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3dhb ProSAT]</span></td></tr>
 </table>
 == Function ==

3dhb

From Proteopedia

Revision as of 08:49, 25 October 2017

1.4 Angstrom Structure of N-Acyl Homoserine Lactone Hydrolase with the Product N-Hexanoyl-L-Homoserine Bound at The Catalytic Metal Center

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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