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| | <StructureSection load='2x5w' size='340' side='right'caption='[[2x5w]], [[Resolution|resolution]] 1.58Å' scene=''> | | <StructureSection load='2x5w' size='340' side='right'caption='[[2x5w]], [[Resolution|resolution]] 1.58Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2x5w]] 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=2X5W OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2X5W FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2x5w]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacterium_tuberculosis_H37Rv Mycobacterium tuberculosis H37Rv]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2X5W OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2X5W FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=K2B:(8ALPHA,9BETA)-CHOLEST-4-EN-3-ONE'>K2B</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]] 1.58Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2x5l|2x5l]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=K2B:(8ALPHA,9BETA)-CHOLEST-4-EN-3-ONE'>K2B</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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2x5w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2x5w OCA], [http://pdbe.org/2x5w PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2x5w RCSB], [http://www.ebi.ac.uk/pdbsum/2x5w PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2x5w 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=2x5w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2x5w OCA], [https://pdbe.org/2x5w PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2x5w RCSB], [https://www.ebi.ac.uk/pdbsum/2x5w PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2x5w ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/CP125_MYCTU CP125_MYCTU] Catalyzes the C-27 hydroxylation of cholest-4-en-3-one and cholesterol and subsequently oxidizes the alcohol of the former to the cholest-4-en-3-one-27-oic acid via the aldehyde intermediate. Not required to incorporate the cholesterol side-chain carbon atoms into cellular lipids.<ref>PMID:19846551</ref> <ref>PMID:20545858</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Myctu]] | + | [[Category: Mycobacterium tuberculosis H37Rv]] |
| - | [[Category: Burlingame, A L]] | + | [[Category: Burlingame AL]] |
| - | [[Category: Chow, E D]] | + | [[Category: Chow ED]] |
| - | [[Category: Cox, J S]] | + | [[Category: Cox JS]] |
| - | [[Category: Guan, S]] | + | [[Category: Guan S]] |
| - | [[Category: Johnston, J B]] | + | [[Category: Johnston JB]] |
| - | [[Category: Kells, P M]] | + | [[Category: Kells PM]] |
| - | [[Category: Montellano, P R.Ortiz de]] | + | [[Category: Ortiz de Montellano PR]] |
| - | [[Category: Ouellet, H]] | + | [[Category: Ouellet H]] |
| - | [[Category: Podust, L M]] | + | [[Category: Podust LM]] |
| - | [[Category: Cholesterol degradation]]
| + | |
| - | [[Category: Metal-binding]]
| + | |
| - | [[Category: Oxidoreductase]]
| + | |
| Structural highlights
Function
CP125_MYCTU Catalyzes the C-27 hydroxylation of cholest-4-en-3-one and cholesterol and subsequently oxidizes the alcohol of the former to the cholest-4-en-3-one-27-oic acid via the aldehyde intermediate. Not required to incorporate the cholesterol side-chain carbon atoms into cellular lipids.[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 infectivity and persistence of Mycobacterium tuberculosis requires the utilization of host cell cholesterol. We have examined the specific role of cytochrome P450 CYP125A1 in the cholesterol degradation pathway using genetic, biochemical and high-resolution mass spectrometric approaches. The analysis of lipid profiles from cells grown on cholesterol revealed that CYP125A1 is required to incorporate the cholesterol side-chain carbon atoms into cellular lipids, as evidenced by an increase in the mass of the methyl-branched phthiocerol dimycocerosates. We observed that cholesterol-exposed cells lacking CYP125A1 accumulate cholest-4-en-3-one, suggesting that this is a physiological substrate for this enzyme. Reconstitution of enzymatic activity with spinach ferredoxin and ferredoxin reductase revealed that recombinant CYP125A1 indeed binds both cholest-4-en-3-one and cholesterol, efficiently hydroxylates both of them at C-27, and then further oxidizes 27-hydroxycholest-4-en-3-one to cholest-4-en-3-one-27-oic acid. We determined the X-ray structure of cholest-4-en-3-one-bound CYP125A1 at a resolution of 1.58 A. CYP125A1 is essential for growth of CDC1551 in media containing cholesterol or cholest-4-en-3-one. In its absence, the latter compound is toxic for both CDC1551 and H37Rv when added with glycerol as a second carbon source. CYP125A1 is a key enzyme in cholesterol metabolism and plays a crucial role in circumventing the deleterious effect of cholest-4-en-3-one.
Mycobacterium tuberculosis CYP125A1, a steroid C27 monooxygenase that detoxifies intracellularly generated cholest-4-en-3-one.,Ouellet H, Guan S, Johnston JB, Chow ED, Kells PM, Burlingame AL, Cox JS, Podust LM, de Montellano PR Mol Microbiol. 2010 Aug;77(3):730-42. Epub 2010 Jun 10. PMID:20545858[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Capyk JK, Kalscheuer R, Stewart GR, Liu J, Kwon H, Zhao R, Okamoto S, Jacobs WR Jr, Eltis LD, Mohn WW. Mycobacterial cytochrome p450 125 (cyp125) catalyzes the terminal hydroxylation of c27 steroids. J Biol Chem. 2009 Dec 18;284(51):35534-42. doi: 10.1074/jbc.M109.072132. Epub . PMID:19846551 doi:http://dx.doi.org/10.1074/jbc.M109.072132
- ↑ Ouellet H, Guan S, Johnston JB, Chow ED, Kells PM, Burlingame AL, Cox JS, Podust LM, de Montellano PR. Mycobacterium tuberculosis CYP125A1, a steroid C27 monooxygenase that detoxifies intracellularly generated cholest-4-en-3-one. Mol Microbiol. 2010 Aug;77(3):730-42. Epub 2010 Jun 10. PMID:20545858 doi:10.1111/j.1365-2958.2010.07243.x
- ↑ Ouellet H, Guan S, Johnston JB, Chow ED, Kells PM, Burlingame AL, Cox JS, Podust LM, de Montellano PR. Mycobacterium tuberculosis CYP125A1, a steroid C27 monooxygenase that detoxifies intracellularly generated cholest-4-en-3-one. Mol Microbiol. 2010 Aug;77(3):730-42. Epub 2010 Jun 10. PMID:20545858 doi:10.1111/j.1365-2958.2010.07243.x
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