6g4b: Difference between revisions
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<StructureSection load='6g4b' size='340' side='right'caption='[[6g4b]], [[Resolution|resolution]] 1.80Å' scene=''> | <StructureSection load='6g4b' size='340' side='right'caption='[[6g4b]], [[Resolution|resolution]] 1.80Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[6g4b]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6G4B OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6G4B FirstGlance]. <br> | <table><tr><td colspan='2'>[[6g4b]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Achromobacter_georgiopolitanum Achromobacter georgiopolitanum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6G4B OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6G4B FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SIN:SUCCINIC+ACID'>SIN</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SIN:SUCCINIC+ACID'>SIN</scene></td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CMK94_18730 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=306 Achromobacter georgiopolitanum])</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=6g4b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6g4b OCA], [http://pdbe.org/6g4b PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6g4b RCSB], [http://www.ebi.ac.uk/pdbsum/6g4b PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6g4b ProSAT]</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=6g4b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6g4b OCA], [http://pdbe.org/6g4b PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6g4b RCSB], [http://www.ebi.ac.uk/pdbsum/6g4b PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6g4b ProSAT]</span></td></tr> | ||
</table> | </table> | ||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The biodegradation of the nylon-6 precursor caprolactam by a strain of Pseudomonas jessenii proceeds via ATP-dependent hydrolytic ring-opening to 6-aminohexanoate. This non-natural omega-amino acid is converted to 6-oxohexanoic acid by an aminotransferase (PjAT) belonging to the fold type I PLP enzymes. To understand the structural basis of 6-aminohexanoatate conversion, we solved different crystal structures and determined the substrate scope with a range of aliphatic and aromatic amines. Comparison with the homologous aminotransferases from Chromobacterium violaceum (CvAT) and Vibrio fluvialis (VfAT) showed that the PjAT enzyme has the lowest KM values (highest affinity) and highest specificity constant (kcat /KM ) with the caprolactam degradation intermediates 6-aminohexanoate and 6-oxohexanoic acid, in accordance with its proposed in vivo function. Five distinct three-dimensional structures of PjAT were solved by protein crystallography. The structure of the aldimine intermediate formed from 6-aminohexanoate and the PLP cofactor revealed the presence of a narrow hydrophobic substrate-binding tunnel leading to the cofactor and covered by a flexible arginine, which explains the high activity and selectivity of the PjAT with 6-aminohexanoate. The results suggest that the degradation pathway for caprolactam has recruited an aminotransferase that is well adapted to 6-aminohexanoate degradation. This article is protected by copyright. All rights reserved. | |||
Biochemical properties of a Pseudomonas aminotransferase involved in caprolactam metabolism.,Palacio CM, Rozeboom HJ, Lanfranchi E, Meng Q, Otzen M, Janssen DB FEBS J. 2019 Jun 4. doi: 10.1111/febs.14950. PMID:31162815<ref>PMID:31162815</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 6g4b" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Achromobacter georgiopolitanum]] | |||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Janssen, D B]] | [[Category: Janssen, D B]] | ||