View source for 1nr6

==MICROSOMAL CYTOCHROME P450 2C5/3LVDH COMPLEX WITH DICLOFENAC==
<StructureSection load='1nr6' size='340' side='right' caption='[[1nr6]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1nr6]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/European_rabbit European rabbit]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NR6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1NR6 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=DIF:2-[2,6-DICHLOROPHENYL)AMINO]BENZENEACETIC+ACID'>DIF</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1n6b|1n6b]], [[1dt6|1dt6]]</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CYP2C5 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9986 European rabbit])</td></tr>
<tr id='activity'><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>
<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=1nr6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1nr6 OCA], [http://pdbe.org/1nr6 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1nr6 RCSB], [http://www.ebi.ac.uk/pdbsum/1nr6 PDBsum]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/CP2C5_RABIT CP2C5_RABIT]] Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/nr/1nr6_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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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== Publication Abstract from PubMed ==
The structure of the anti-inflammatory drug diclofenac bound in the active site of rabbit microsomal cytochrome P450 2C5/3LVdH was determined by X-ray crystallography to 2.1 A resolution. P450 2C5/3LVdH and the related enzyme 2C5dH catalyze the 4'-hydroxylation of diclofenac with apparent K(m) values of 80 and 57 microM and k(cat) values of 13 and 16 min(-1), respectively. Spectrally determined binding constants are similar to the K(m) values. The structure indicates that the pi-electron system of the dichlorophenyl moiety faces the heme Fe with the 3'- and 4'-carbons located 4.4 and 4.7 A, respectively, from the Fe. The carboxyl moiety of the substrate is hydrogen bonded to a cluster of waters that are also hydrogen bonded to the side chains of N204, K241, S289, and D290 as well as the backbone of the protein. The proximity of the diclofenac carboxylate to the side chain of D290 together with an increased binding affinity at lower pH suggests that diclofenac is protonated when bound to the enzyme. The structure exhibits conformational changes indicative of an adaptive fit to the substrate reflecting both the hydration and size of the substrate. These results indicate how structurally diverse substrates are recognized by drug-metabolizing P450 enzymes.

Structure of mammalian cytochrome P450 2C5 complexed with diclofenac at 2.1 A resolution: evidence for an induced fit model of substrate binding.,Wester MR, Johnson EF, Marques-Soares C, Dijols S, Dansette PM, Mansuy D, Stout CD Biochemistry. 2003 Aug 12;42(31):9335-45. PMID:12899620<ref>PMID:12899620</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Cytochrome P450|Cytochrome P450]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: European rabbit]]
[[Category: Unspecific monooxygenase]]
[[Category: Johnson, E F]]
[[Category: Stout, C D]]
[[Category: Wester, M R]]
[[Category: Cyp2c5]]
[[Category: Diclofenac complex]]
[[Category: Estradiol 2-hydroxylase]]
[[Category: Membrane protein]]
[[Category: Oxidoreductase]]
[[Category: P450]]
[[Category: Progesterone 21-hydroxylase]]
[[Category: Pyrene hydroxylase]]