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3aj3

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<StructureSection load='3aj3' size='340' side='right'caption='[[3aj3]], [[Resolution|resolution]] 1.58&Aring;' scene=''>
<StructureSection load='3aj3' size='340' side='right'caption='[[3aj3]], [[Resolution|resolution]] 1.58&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[3aj3]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_700743 Atcc 700743]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3AJ3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3AJ3 FirstGlance]. <br>
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<table><tr><td colspan='2'>[[3aj3]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Mesorhizobium_loti Mesorhizobium loti]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3AJ3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3AJ3 FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.577&#8491;</td></tr>
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<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3aj0|3aj0]]</div></td></tr>
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">mlr6805 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=381 ATCC 700743])</td></tr>
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<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/4-pyridoxolactonase 4-pyridoxolactonase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.1.27 3.1.1.27] </span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3aj3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3aj3 OCA], [https://pdbe.org/3aj3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3aj3 RCSB], [https://www.ebi.ac.uk/pdbsum/3aj3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3aj3 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=3aj3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3aj3 OCA], [https://pdbe.org/3aj3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3aj3 RCSB], [https://www.ebi.ac.uk/pdbsum/3aj3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3aj3 ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
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[[https://www.uniprot.org/uniprot/PDLA_RHILO PDLA_RHILO]] Involved in the degradation of pyridoxine or pyridoxamine (free, phosphate-unbound, forms of vitamin B6). Hydrolyzes 4-pyridoxolactone to 4-pyridoxic acid. Has lower activity toward N-hexanoyl-D,L-homoserine lactone, but is not active toward 5-pyridoxolactone and gamma-butyrolactone.
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[https://www.uniprot.org/uniprot/PDLA_RHILO PDLA_RHILO] Involved in the degradation of pyridoxine or pyridoxamine (free, phosphate-unbound, forms of vitamin B6). Hydrolyzes 4-pyridoxolactone to 4-pyridoxic acid. Has lower activity toward N-hexanoyl-D,L-homoserine lactone, but is not active toward 5-pyridoxolactone and gamma-butyrolactone.
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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4-Pyridoxolactonase from Mesorhizobium loti catalyzes the zinc-dependent lactone-ring hydrolysis of 4-pyridoxolactone (4PAL) to 4-pyridoxic acid (4PA) in vitamin B6 degradation pathway I. The crystal structures of 4-pyridoxolactonase and its complex with 5-pyridoxolactone (5PAL; the competitive inhibitor) were determined. The overall structure was an alphabeta/betaalpha sandwich fold, and two zinc ions were coordinated. This strongly suggested that the enzyme belongs to subclass B3 of the class B beta-lactamases. In the complex structure, the carbonyl group of 5PAL pointed away from the active site, revealing why it acts as a competitive inhibitor. Based on docking simulation with 4PAL, 4PA and a reaction intermediate, 4-pyridoxolactonase probably catalyzes the reaction through a subclass B2-like mechanism, not the subclass B3 mechanism.
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Structure of 4-pyridoxolactonase from Mesorhizobium loti.,Kobayashi J, Yoshikane Y, Yagi T, Baba S, Mizutani K, Takahashi N, Mikami B Acta Crystallogr F Struct Biol Commun. 2014 Apr;70(Pt 4):424-32. doi:, 10.1107/S2053230X14003926. Epub 2014 Mar 25. PMID:24699732<ref>PMID:24699732</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 3aj3" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: 4-pyridoxolactonase]]
 
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[[Category: Atcc 700743]]
 
[[Category: Large Structures]]
[[Category: Large Structures]]
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[[Category: Baba, S]]
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[[Category: Mesorhizobium loti]]
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[[Category: Kobayashi, J]]
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[[Category: Baba S]]
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[[Category: Mikami, B]]
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[[Category: Kobayashi J]]
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[[Category: Yagi, T]]
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[[Category: Mikami B]]
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[[Category: Yoshikane, Y]]
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[[Category: Yagi T]]
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[[Category: Hydrolase]]
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[[Category: Yoshikane Y]]
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[[Category: Metallo-beta-lactamase]]
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[[Category: Zn-protein]]
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Current revision

Crystal structure of selenomethionine substituted 4-pyridoxolactonase from Mesorhizobium loti

PDB ID 3aj3

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