View source for 2j0d


==Crystal structure of human P450 3A4 in complex with erythromycin==
<StructureSection load='2j0d' size='340' side='right'caption='[[2j0d]], [[Resolution|resolution]] 2.75&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2j0d]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. The October 2006 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Cytochrome p450''  by David S. Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2006_10 10.2210/rcsb_pdb/mom_2006_10]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2J0D OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2J0D FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.75&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ERY:ERYTHROMYCIN+A'>ERY</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</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=2j0d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2j0d OCA], [https://pdbe.org/2j0d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2j0d RCSB], [https://www.ebi.ac.uk/pdbsum/2j0d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2j0d ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CP3A4_HUMAN CP3A4_HUMAN] Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It performs a variety of oxidation reactions (e.g. caffeine 8-oxidation, omeprazole sulphoxidation, midazolam 1'-hydroxylation and midazolam 4-hydroxylation) of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. Acts as a 1,8-cineole 2-exo-monooxygenase. The enzyme also hydroxylates etoposide.<ref>PMID:11159812</ref> 
== 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/j0/2j0d_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/main_output.php?pdb_ID=2j0d ConSurf].
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== Publication Abstract from PubMed ==
Cytochrome P450 (CYP) 3A4 is the most promiscuous of the human CYP enzymes and contributes to the metabolism of approximately 50% of marketed drugs. It is also the isoform most often involved in unwanted drug-drug interactions. A better understanding of the molecular mechanisms governing CYP3A4-ligand interaction therefore would be of great importance to any drug discovery effort. Here, we present crystal structures of human CYP3A4 in complex with two well characterized drugs: ketoconazole and erythromycin. In contrast to previous reports, the protein undergoes dramatic conformational changes upon ligand binding with an increase in the active site volume by &gt;80%. The structures represent two distinct open conformations of CYP3A4 because ketoconazole and erythromycin induce different types of coordinate shifts. The binding of two molecules of ketoconazole to the CYP3A4 active site and the clear indication of multiple binding modes for erythromycin has implications for the interpretation of the atypical kinetic data often displayed by CYP3A4. The extreme flexibility revealed by the present structures also challenges any attempt to apply computational design tools without the support of relevant experimental data.

Structural basis for ligand promiscuity in cytochrome P450 3A4.,Ekroos M, Sjogren T Proc Natl Acad Sci U S A. 2006 Sep 12;103(37):13682-7. Epub 2006 Sep 5. PMID:16954191<ref>PMID:16954191</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 2j0d" style="background-color:#fffaf0;"></div>

==See Also==
*[[Cytochrome P450 3D structures|Cytochrome P450 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Cytochrome p450]]
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: RCSB PDB Molecule of the Month]]
[[Category: Ekroos M]]
[[Category: Sjogren T]]