2pg6

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[[Image:2pg6.png|left|200px]]
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==Crystal Structure of Human Microsomal P450 2A6 L240C/N297Q==
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<StructureSection load='2pg6' size='340' side='right' caption='[[2pg6]], [[Resolution|resolution]] 2.53&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2pg6]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PG6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2PG6 FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1z10|1z10]], [[1z11|1z11]], [[2fdu|2fdu]], [[2fdv|2fdv]], [[2fdw|2fdw]], [[2fdy|2fdy]], [[2pg5|2pg5]], [[2pg7|2pg7]]</td></tr>
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<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CYP2A6 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr>
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<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Unspecific_monooxygenase Unspecific monooxygenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.14.14.1 1.14.14.1] </span></td></tr>
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2pg6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2pg6 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2pg6 RCSB], [http://www.ebi.ac.uk/pdbsum/2pg6 PDBsum]</span></td></tr>
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<table>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/pg/2pg6_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Human P450 2A6 displays a small active site that is well adapted for the oxidation of small planar substrates. Mutagenesis of CYP2A6 resulted in an increased catalytic efficiency for indole biotransformation to pigments and conferred a capacity to oxidize substituted indoles (Wu, Z.-L., Podust, L.M., Guengerich, F.P. J. Biol. Chem. 49 (2005) 41090-41100.). Here, we describe the structural basis that underlies the altered metabolic profile of three mutant enzymes, P450 2A6 N297Q, L240C/N297Q and N297Q/I300V. The Asn297 substitution abolishes a potential hydrogen bonding interaction with substrates in the active site, and replaces a structural water molecule between the helix B'-C region and helix I while maintaining structural hydrogen bonding interactions. The structures of the P450 2A6 N297Q/L240C and N297Q/I300V mutants provide clues as to how the protein can adapt to fit the larger substituted indoles in the active site, and enable a comparison with other P450 family 2 enzymes for which the residue at the equivalent position was seen to function in isozyme specificity, structural integrity and protein flexibility.
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{{STRUCTURE_2pg6| PDB=2pg6 | SCENE= }}
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Structural insight into the altered substrate specificity of human cytochrome P450 2A6 mutants.,Sansen S, Hsu MH, Stout CD, Johnson EF Arch Biochem Biophys. 2007 Aug 15;464(2):197-206. Epub 2007 May 11. PMID:17540336<ref>PMID:17540336</ref>
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===Crystal Structure of Human Microsomal P450 2A6 L240C/N297Q===
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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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{{ABSTRACT_PUBMED_17540336}}
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==About this Structure==
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[[2pg6]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PG6 OCA].
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==See Also==
==See Also==
*[[Cytochrome P450|Cytochrome P450]]
*[[Cytochrome P450|Cytochrome P450]]
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:017540336</ref><references group="xtra"/>
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__TOC__
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Unspecific monooxygenase]]
[[Category: Unspecific monooxygenase]]

Revision as of 06:25, 29 September 2014

Crystal Structure of Human Microsomal P450 2A6 L240C/N297Q

2pg6, resolution 2.53Å

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