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1q5d

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[[Image:1q5d.jpg|left|200px]]
 
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{{Structure
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==Epothilone B-bound Cytochrome P450epoK==
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|PDB= 1q5d |SIZE=350|CAPTION= <scene name='initialview01'>1q5d</scene>, resolution 1.93&Aring;
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<StructureSection load='1q5d' size='340' side='right'caption='[[1q5d]], [[Resolution|resolution]] 1.93&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=EPB:7,11-DIHYDROXY-8,8,10,12,16-PENTAMETHYL-3-[1-METHYL-2-(2-METHYL-THIAZOL-4-YL)VINYL]-4,17-DIOXABICYCLO[14.1.0]HEPTADECANE-5,9-DIONE'>EPB</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>
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<table><tr><td colspan='2'>[[1q5d]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Sorangium_cellulosum Sorangium cellulosum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q5D OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1Q5D FirstGlance]. <br>
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|ACTIVITY=
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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]] 1.93&#8491;</td></tr>
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|GENE= epoK ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=56 Sorangium cellulosum])
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EPB:7,11-DIHYDROXY-8,8,10,12,16-PENTAMETHYL-3-[1-METHYL-2-(2-METHYL-THIAZOL-4-YL)VINYL]-4,17-DIOXABICYCLO[14.1.0]HEPTADECANE-5,9-DIONE'>EPB</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr>
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|DOMAIN=
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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=1q5d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q5d OCA], [https://pdbe.org/1q5d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1q5d RCSB], [https://www.ebi.ac.uk/pdbsum/1q5d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1q5d ProSAT]</span></td></tr>
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|RELATEDENTRY=[[1pkf|1PKF]], [[1q5e|1Q5E]]
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</table>
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1q5d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q5d OCA], [http://www.ebi.ac.uk/pdbsum/1q5d PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1q5d RCSB]</span>
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== Function ==
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}}
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[https://www.uniprot.org/uniprot/C167_SORCE C167_SORCE] Involved in the biosynthesis of epothilones, macrolactones which have a narrow anti-fungal spectrum and microtubule-stabilizing activity. Responsible for the epooxidation of epothilones C and D to epothilones A and B, respectively.<ref>PMID:10831849</ref>
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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/q5/1q5d_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/main_output.php?pdb_ID=1q5d ConSurf].
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<div style="clear:both"></div>
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'''Epothilone B-bound Cytochrome P450epoK'''
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==See Also==
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*[[Cytochrome P450 3D structures|Cytochrome P450 3D structures]]
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== References ==
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==Overview==
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<references/>
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Epothilones are potential anticancer drugs that stabilize microtubules by binding to tubulin in a manner similar to paclitaxel. Cytochrome P450epoK (P450epoK), a heme containing monooxygenase involved in epothilone biosynthesis in the myxobacterium Sorangium cellulosum, catalyzes the epoxidation of epothilones C and D into epothilones A and B, respectively. The 2.10-, 1.93-, and 2.65-A crystal structures reported here for the epothilone D-bound, epothilone B-bound, and substrate-free forms, respectively, are the first crystal structures of an epothilone-binding protein. Although the substrate for P450epoK is the largest of a P450 whose x-ray structure is known, the structural changes along with substrate binding or product release are very minor and the overall fold is similar to other P450s. The epothilones are positioned with the macrolide ring roughly perpendicular to the heme plane and I helix, and the thiazole moiety provides key interactions that very likely are critical in determining substrate specificity. Interestingly, there are strong parallels between the epothilone/P450epoK and paclitaxel/tubulin interactions. Based on structural similarities, a plausible epothilone tubulin-binding mode is proposed.
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__TOC__
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</StructureSection>
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==About this Structure==
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[[Category: Large Structures]]
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1Q5D is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Sorangium_cellulosum Sorangium cellulosum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q5D OCA].
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==Reference==
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Crystal structures of epothilone D-bound, epothilone B-bound, and substrate-free forms of cytochrome P450epoK., Nagano S, Li H, Shimizu H, Nishida C, Ogura H, Ortiz de Montellano PR, Poulos TL, J Biol Chem. 2003 Nov 7;278(45):44886-93. Epub 2003 Aug 21. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12933799 12933799]
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[[Category: Single protein]]
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[[Category: Sorangium cellulosum]]
[[Category: Sorangium cellulosum]]
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[[Category: Li, H.]]
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[[Category: Li H]]
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[[Category: Montellano, P R.Ortiz de.]]
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[[Category: Nagano S]]
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[[Category: Nagano, S.]]
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[[Category: Nishida C]]
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[[Category: Nishida, C.]]
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[[Category: Ogura H]]
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[[Category: Ogura, H.]]
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[[Category: Ortiz de Montellano PR]]
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[[Category: Poulos, T L.]]
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[[Category: Poulos TL]]
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[[Category: Shimizu, H.]]
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[[Category: Shimizu H]]
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[[Category: cytochrome p450]]
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[[Category: epothilone]]
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[[Category: heme-enzyme]]
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[[Category: oxydoreductase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 23:09:03 2008''
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Current revision

Epothilone B-bound Cytochrome P450epoK

PDB ID 1q5d

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