4h1n
From Proteopedia
(Difference between revisions)
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4h1n]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4H1N OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4H1N FirstGlance]. <br> | <table><tr><td colspan='2'>[[4h1n]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4H1N OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4H1N FirstGlance]. <br> | ||
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CGE:CLOPIDOGREL'>CGE</scene>, <scene name='pdbligand=CM5:5-CYCLOHEXYL-1-PENTYL-BETA-D-MALTOSIDE'>CM5</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.99Å</td></tr> |
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CGE:CLOPIDOGREL'>CGE</scene>, <scene name='pdbligand=CM5:5-CYCLOHEXYL-1-PENTYL-BETA-D-MALTOSIDE'>CM5</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=4h1n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4h1n OCA], [https://pdbe.org/4h1n PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4h1n RCSB], [https://www.ebi.ac.uk/pdbsum/4h1n PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4h1n 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=4h1n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4h1n OCA], [https://pdbe.org/4h1n PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4h1n RCSB], [https://www.ebi.ac.uk/pdbsum/4h1n PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4h1n ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
[https://www.uniprot.org/uniprot/CP2B4_RABIT CP2B4_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. In the epoxidation of arachidonic acid it has a unique preference for the 5,6-olefin. | [https://www.uniprot.org/uniprot/CP2B4_RABIT CP2B4_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. In the epoxidation of arachidonic acid it has a unique preference for the 5,6-olefin. | ||
| - | <div style="background-color:#fffaf0;"> | ||
| - | == Publication Abstract from PubMed == | ||
| - | Prior X-ray crystal structures of cytochrome P450 2B4 revealed the pivotal role of rearrangement of the side chains of residues F206 and F297 in the active site in accommodating various inhibitors or substrates. To explore the role of these residues, 2B4 F206A and F297A were created by site-directed mutagenesis and characterized functionally. The structure of F297A with clopidogrel demonstrated the reorientation of the ligand such that the methyl ester group is oriented toward the heme, whereas the thiophene moiety now extends to the additional void in the F297A mutant. Most interestingly, movement of the I helix and several amino acid side chains within the active site was observed in apparent response to the altered binding orientation. Results of flexible docking using the 2B4 wild type or the F297A-virtual mutant positioned either the thiophene or chlorophenyl group closer to heme. However, docking of clopidogrel using the real F297A mutant or a virtual mutant with the I-helix re-positioned oriented clopidogrel preferentially with either the methyl ester or the chlorophenyl group closest to heme. The study provides insight into how the altered active site adapts to accommodate and interact with the substrate in a distinct orientation while maintaining the overall closed protein conformation. | ||
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| - | X-ray crystal structure of the cytochrome P450 2B4 active site mutant F297A in complex with clopidogrel: Insights into compensatory rearrangements of the binding pocket.,Shah MB, Jang HH, Zhang Q, David Stout C, Halpert JR Arch Biochem Biophys. 2013 Jan 4. pii: S0003-9861(12)00434-1. doi:, 10.1016/j.abb.2012.12.016. PMID:23296089<ref>PMID:23296089</ref> | ||
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| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| - | </div> | ||
| - | <div class="pdbe-citations 4h1n" style="background-color:#fffaf0;"></div> | ||
==See Also== | ==See Also== | ||
*[[Cytochrome P450 3D structures|Cytochrome P450 3D structures]] | *[[Cytochrome P450 3D structures|Cytochrome P450 3D structures]] | ||
| - | == References == | ||
| - | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
Current revision
Crystal Structure of P450 2B4 F297A Mutant in Complex with Anti-platelet Drug Clopidogrel
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