2cib: Difference between revisions
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<StructureSection load='2cib' size='340' side='right' caption='[[2cib]], [[Resolution|resolution]] 1.50Å' scene=''> | <StructureSection load='2cib' size='340' side='right' caption='[[2cib]], [[Resolution|resolution]] 1.50Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2cib]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[2cib]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Myctu Myctu]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2CIB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2CIB FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CM6:(2S)-2-[(2,1,3-BENZOTHIADIAZOL-4-YLSULFONYL)AMINO]-2-PHENYL-N-PYRIDIN-4-YLACETAMIDE'>CM6</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CM6:(2S)-2-[(2,1,3-BENZOTHIADIAZOL-4-YLSULFONYL)AMINO]-2-PHENYL-N-PYRIDIN-4-YLACETAMIDE'>CM6</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1e9x|1e9x]], [[1ea1|1ea1]], [[1h5z|1h5z]], [[1u13|1u13]], [[1x8v|1x8v]], [[2bz9|2bz9]], [[2ci0|2ci0]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1e9x|1e9x]], [[1ea1|1ea1]], [[1h5z|1h5z]], [[1u13|1u13]], [[1x8v|1x8v]], [[2bz9|2bz9]], [[2ci0|2ci0]]</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Sterol_14-demethylase Sterol 14-demethylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.14.13.70 1.14.13.70] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Sterol_14-demethylase Sterol 14-demethylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.14.13.70 1.14.13.70] </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=2cib FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2cib OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2cib RCSB], [http://www.ebi.ac.uk/pdbsum/2cib 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=2cib FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2cib OCA], [http://pdbe.org/2cib PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2cib RCSB], [http://www.ebi.ac.uk/pdbsum/2cib PDBsum]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 2cib" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Myctu]] | ||
[[Category: Sterol 14-demethylase]] | [[Category: Sterol 14-demethylase]] | ||
[[Category: Kim, Y]] | [[Category: Kim, Y]] | ||
Revision as of 02:33, 11 September 2015
HIGH THROUGHPUT SCREENING AND X-RAY CRYSTALLOGRAPHY ASSISTED EVALUATION OF SMALL MOLECULE SCAFFOLDS FOR CYP51 INHIBITORSHIGH THROUGHPUT SCREENING AND X-RAY CRYSTALLOGRAPHY ASSISTED EVALUATION OF SMALL MOLECULE SCAFFOLDS FOR CYP51 INHIBITORS
Structural highlights
Function[CP51_MYCTU] Its precise biological substrate is not known. Catalyzes C14-demethylation of lanosterol, 24,25-dihydrolanosterol and obtusifoliol which is critical for ergosterol biosynthesis. It transforms lanosterol into 4,4'-dimethyl cholesta-8,14,24-triene-3-beta-ol.[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 PubMedSterol 14alpha-demethylase (CYP51), a major checkpoint in membrane sterol biosynthesis, is a key target for fungal antibiotic therapy. We sought small organic molecules for lead candidate CYP51 inhibitors. The changes in CYP51 spectral properties following ligand binding make CYP51 a convenient target for high-throughput screening technologies. These changes are characteristic of either substrate binding (type I) or inhibitor binding (type II) in the active site. We screened a library of 20,000 organic molecules against Mycobacterium tuberculosis CYP51 (CYP51(Mt)), examined the top type I and type II binding hits for their inhibitory effects on M. tuberculosis in broth culture, and analyzed them spectrally for their ability to discriminate between CYP51(Mt) and two reference M. tuberculosis CYP proteins, CYP130 and CYP125. We determined the binding mode for one of the top type II hits, alpha-ethyl-N-4-pyridinyl-benzeneacetamide (EPBA), by solving the X-ray structure of the CYP51(Mt)-EPBA complex to a resolution of 1.53 A. EPBA binds coordinately to the heme iron in the CYP51(Mt) active site through a lone pair of nitrogen electrons and also through hydrogen bonds with residues H259 and Y76, which are invariable in the CYP51 family, and hydrophobic interactions in a phylum- and/or substrate-specific cavity of CYP51. We also identified a second compound with structural and binding properties similar to those of EPBA, 2-(benzo[d]-2,1,3-thiadiazole-4-sulfonyl)-2-amino-2-phenyl-N-(pyridinyl-4) -acetamide (BSPPA). The congruence between the geometries of EPBA and BSPPA and the CYP51 binding site singles out EPBA and BSPPA as lead candidate CYP51 inhibitors with optimization potential for efficient discrimination between host and pathogen enzymes. Small-molecule scaffolds for CYP51 inhibitors identified by high-throughput screening and defined by X-ray crystallography.,Podust LM, von Kries JP, Eddine AN, Kim Y, Yermalitskaya LV, Kuehne R, Ouellet H, Warrier T, Altekoster M, Lee JS, Rademann J, Oschkinat H, Kaufmann SH, Waterman MR Antimicrob Agents Chemother. 2007 Nov;51(11):3915-23. Epub 2007 Sep 10. PMID:17846131[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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