4j5h
From Proteopedia
(Difference between revisions)
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4j5h]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_thuringiensis Bacillus thuringiensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4J5H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4J5H FirstGlance]. <br> | <table><tr><td colspan='2'>[[4j5h]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_thuringiensis Bacillus thuringiensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4J5H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4J5H FirstGlance]. <br> | ||
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=1K4:N-DECANOYL-L-HOMOSERINE'>1K4</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.45Å</td></tr> |
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=1K4:N-DECANOYL-L-HOMOSERINE'>1K4</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4j5h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4j5h OCA], [https://pdbe.org/4j5h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4j5h RCSB], [https://www.ebi.ac.uk/pdbsum/4j5h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4j5h ProSAT]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4j5h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4j5h OCA], [https://pdbe.org/4j5h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4j5h RCSB], [https://www.ebi.ac.uk/pdbsum/4j5h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4j5h ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
[https://www.uniprot.org/uniprot/AHLL_BACTU AHLL_BACTU] 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.<ref>PMID:15895999</ref> | [https://www.uniprot.org/uniprot/AHLL_BACTU AHLL_BACTU] 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.<ref>PMID:15895999</ref> | ||
| - | <div style="background-color:#fffaf0;"> | ||
| - | == Publication Abstract from PubMed == | ||
| - | Autoinducer inactivator A (AiiA) is a metal-dependent N-acyl homoserine lactone hydrolase that displays broad substrate specificity but shows a preference for substrates with long N-acyl substitutions. Previously, crystal structures of AiiA in complex with the ring-opened product N-hexanoyl-l-homoserine revealed binding interactions near the metal center but did not identify a binding pocket for the N-acyl chains of longer substrates. Here we report the crystal structure of an AiiA mutant, F107W, determined in the presence and absence of N-decanoyl-l-homoserine. F107 is located in a hydrophobic cavity adjacent to the previously identified ligand binding pocket, and the F107W mutation results in the formation of an unexpected interaction with the ring-opened product. Notably, the structure reveals a previously unidentified hydrophobic binding pocket for the substrate's N-acyl chain. Two aromatic residues, F64 and F68, form a hydrophobic clamp, centered around the seventh carbon in the product-bound structure's decanoyl chain, making an interaction that would also be available for longer substrates, but not for shorter substrates. Steady-state kinetics using substrates of various lengths with AiiA bearing mutations at the hydrophobic clamp, including insertion of a redox-sensitive cysteine pair, confirms the importance of this hydrophobic feature for substrate preference. Identifying the specificity determinants of AiiA will aid the development of more selective quorum-quenching enzymes as tools and as potential therapeutics. | ||
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| - | A phenylalanine clamp controls substrate specificity in the quorum-quenching metallo-gamma-lactonase from Bacillus thuringiensis.,Liu CF, Liu D, Momb J, Thomas PW, Lajoie A, Petsko GA, Fast W, Ringe D Biochemistry. 2013 Mar 5;52(9):1603-10. doi: 10.1021/bi400050j. Epub 2013 Feb 20. PMID:23387521<ref>PMID:23387521</ref> | ||
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| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| - | </div> | ||
| - | <div class="pdbe-citations 4j5h" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Current revision
Crystal Structure of B. thuringiensis AiiA mutant F107W with N-decanoyl-L-homoserine bound at the active site
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Categories: Bacillus thuringiensis | Large Structures | Fast W | Lajoie A | Liu CF | Liu D | Momb J | Petsko GA | Ringe D | Thomas PW
