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1jin

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Revision as of 03:22, 11 September 2015

P450eryF/ketoconazole

Structural highlights

1jin is a 1 chain structure with sequence from "actinomyces_erythreus"_(sic)_waksman_1923 "actinomyces erythreus" (sic) waksman 1923. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[CPXJ_SACEN] Catalyzes the NADPH-dependent conversion of 6-deoxyerythronolide B (6-DEB) to erythronolide B (EB) by the insertion of an oxygen at the 6S position of 6-DEB. Requires the participation of a ferredoxin and a ferredoxin reductase for the transfer of electrons from NADPH to the monooxygenase.^[1] ^[2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The azole-based P450 inhibitor ketoconazole is used to treat fungal infections and functions by blocking ergosterol biosynthesis in yeast. Ketoconazole binds to mammalian P450 enzymes and this can result in drug-drug interactions and lead to liver damage. To identify protein-drug interactions that contribute to binding specificity and affinity, we determined the crystal structure of ketoconazole complexed with P450eryF. In the P450eryF/ketoconazole structure, the azole moiety and nearby rings of ketoconzole are positioned in the active site similar to the substrate, 6-deoxyerythronolide B, with the azole nitrogen atom coordinated to the heme iron atom. The remainder of the ketoconazole molecule extends into the active-site pocket, which is occupied by water in the substrate complex. Binding of ketoconazole led to unexpected conformational changes in the I-helix. The I-helix cleft near the active site has collapsed with a helical pitch of 5.4 A compared to 6.6 A in the substrate complex. P450eryF/ketoconazole crystals soaked in 6-deoxyerythronolide B to exchange ligands exhibit a structure identical with that of the original P450eryF/substrate complex, with the I-helix cleft restored to a pitch of 6.6 A. These findings indicate that the I-helix region of P450eryF is flexible and can adopt multiple conformations. An improved understanding of the flexibility of the active-site region of cytochrome P450 enzymes is important to gain insight into determinants of ligand binding/specificity as well as to evaluate models for catalytic mechanism based on static crystal structures.

Ketoconazole-induced conformational changes in the active site of cytochrome P450eryF.,Cupp-Vickery JR, Garcia C, Hofacre A, McGee-Estrada K J Mol Biol. 2001 Aug 3;311(1):101-10. PMID:11469860^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Andersen JF, Hutchinson CR. Characterization of Saccharopolyspora erythraea cytochrome P-450 genes and enzymes, including 6-deoxyerythronolide B hydroxylase. J Bacteriol. 1992 Feb;174(3):725-35. PMID:1732208
↑ Weber JM, Leung JO, Swanson SJ, Idler KB, McAlpine JB. An erythromycin derivative produced by targeted gene disruption in Saccharopolyspora erythraea. Science. 1991 Apr 5;252(5002):114-7. PMID:2011746
↑ Cupp-Vickery JR, Garcia C, Hofacre A, McGee-Estrada K. Ketoconazole-induced conformational changes in the active site of cytochrome P450eryF. J Mol Biol. 2001 Aug 3;311(1):101-10. PMID:11469860 doi:10.1006/jmbi.2001.4803

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1jin"

@@ Line 2: / Line 2: @@
 <StructureSection load='1jin' size='340' side='right' caption='[[1jin]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1jin]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharopolyspora_erythraea Saccharopolyspora erythraea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JIN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1JIN FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1jin]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"actinomyces_erythreus"_(sic)_waksman_1923 "actinomyces erythreus" (sic) waksman 1923]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JIN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1JIN FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=KTN:CIS-1-ACETYL-4-(4-((2-(2,4-DICHLOROPHENYL)-2-(1H-IMIDAZOL-1-YLMETHYL)-1,3-DIOXOLAN-4-YL)METHOXY)PHENYL)PIPERAZINE'>KTN</scene></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=1jin FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1jin OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1jin RCSB], [http://www.ebi.ac.uk/pdbsum/1jin PDBsum]</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=1jin FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1jin OCA], [http://pdbe.org/1jin PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1jin RCSB], [http://www.ebi.ac.uk/pdbsum/1jin PDBsum]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/CPXJ_SACER CPXJ_SACER]] Conversion of 6-deoxyerythronolide B (6-DEB) to erythronolide B (EB) by the insertion of an oxygen at the 6S position of 6-DEB.
+[[http://www.uniprot.org/uniprot/CPXJ_SACEN CPXJ_SACEN]] Catalyzes the NADPH-dependent conversion of 6-deoxyerythronolide B (6-DEB) to erythronolide B (EB) by the insertion of an oxygen at the 6S position of 6-DEB. Requires the participation of a ferredoxin and a ferredoxin reductase for the transfer of electrons from NADPH to the monooxygenase.<ref>PMID:1732208</ref> <ref>PMID:2011746</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 26: / Line 26: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1jin" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 33: / Line 34: @@
 __TOC__
 </StructureSection>
-[[Category: Saccharopolyspora erythraea]]
 [[Category: Cupp-Vickery, J R]]
 [[Category: Garcia, C]]

1jin

From Proteopedia

Revision as of 03:22, 11 September 2015

P450eryF/ketoconazole

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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