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| | <StructureSection load='3k9y' size='340' side='right'caption='[[3k9y]], [[Resolution|resolution]] 2.80Å' scene=''> | | <StructureSection load='3k9y' size='340' side='right'caption='[[3k9y]], [[Resolution|resolution]] 2.80Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3k9y]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3K9Y OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3K9Y FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3k9y]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3K9Y OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3K9Y FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CM5:5-CYCLOHEXYL-1-PENTYL-BETA-D-MALTOSIDE'>CM5</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</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]] 2.8Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3k9v|3k9v]]</div></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CM5:5-CYCLOHEXYL-1-PENTYL-BETA-D-MALTOSIDE'>CM5</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Cyp24, Cyp24a1 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat])</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=3k9y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3k9y OCA], [https://pdbe.org/3k9y PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3k9y RCSB], [https://www.ebi.ac.uk/pdbsum/3k9y PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3k9y 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=3k9y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3k9y OCA], [https://pdbe.org/3k9y PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3k9y RCSB], [https://www.ebi.ac.uk/pdbsum/3k9y PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3k9y ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/CP24A_RAT CP24A_RAT]] Has a role in maintaining calcium homeostasis. Catalyzes the NADPH-dependent 24-hydroxylation of calcidiol (25-hydroxyvitamin D(3)) and calcitriol (1-alpha,25-dihydroxyvitamin D(3)). The enzyme can perform up to 6 rounds of hydroxylation of calcitriol leading to calcitroic acid.
| + | [https://www.uniprot.org/uniprot/CP24A_RAT CP24A_RAT] Has a role in maintaining calcium homeostasis. Catalyzes the NADPH-dependent 24-hydroxylation of calcidiol (25-hydroxyvitamin D(3)) and calcitriol (1-alpha,25-dihydroxyvitamin D(3)). The enzyme can perform up to 6 rounds of hydroxylation of calcitriol leading to calcitroic acid. |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Buffalo rat]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Annalora, A J]] | + | [[Category: Rattus norvegicus]] |
| - | [[Category: Goodin, D B]] | + | [[Category: Annalora AJ]] |
| - | [[Category: Hong, W]] | + | [[Category: Goodin DB]] |
| - | [[Category: Johnson, E F]] | + | [[Category: Hong W]] |
| - | [[Category: Stout, C D]] | + | [[Category: Johnson EF]] |
| - | [[Category: Zhang, Q]] | + | [[Category: Stout CD]] |
| - | [[Category: Adrenodoxin]]
| + | [[Category: Zhang Q]] |
| - | [[Category: Mitochondrial cytochrome p450]]
| + | |
| - | [[Category: Monooxygenase]]
| + | |
| - | [[Category: Monotopic membrane protein]]
| + | |
| - | [[Category: Oxidoreductase]]
| + | |
| - | [[Category: Vitamin d hormone metabolism]]
| + | |
| Structural highlights
Function
CP24A_RAT Has a role in maintaining calcium homeostasis. Catalyzes the NADPH-dependent 24-hydroxylation of calcidiol (25-hydroxyvitamin D(3)) and calcitriol (1-alpha,25-dihydroxyvitamin D(3)). The enzyme can perform up to 6 rounds of hydroxylation of calcitriol leading to calcitroic acid.
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
Cytochrome P450 (CYP) 24A1 catalyzes the side-chain oxidation of the hormonal form of vitamin D. Expression of CYP24A1 is up-regulated to attenuate vitamin D signaling associated with calcium homeostasis and cellular growth processes. The development of therapeutics for disorders linked to vitamin D insufficiency would be greatly facilitated by structural knowledge of CYP24A1. Here, we report the crystal structure of rat CYP24A1 at 2.5 A resolution. The structure exhibits an open cleft leading to the active-site heme prosthetic group on the distal surface that is likely to define the path of substrate access into the active site. The entrance to the cleft is flanked by conserved hydrophobic residues on helices A' and G', suggesting a mode of insertion into the inner mitochondrial membrane. A docking model for 1alpha,25-dihydroxyvitamin D(3) binding in the open form of CYP24A1 that clarifies the structural determinants of secosteroid recognition and validates the predictive power of existing homology models of CYP24A1 is proposed. Analysis of CYP24A1's proximal surface identifies the determinants of adrenodoxin recognition as a constellation of conserved residues from helices K, K, and L that converge with an adjacent lysine-rich loop for binding the redox protein. Overall, the CYP24A1 structure provides the first template for understanding membrane insertion, substrate binding, and redox partner interaction in mitochondrial P450s.
Crystal structure of CYP24A1, a mitochondrial cytochrome P450 involved in vitamin D metabolism.,Annalora AJ, Goodin DB, Hong WX, Zhang Q, Johnson EF, Stout CD J Mol Biol. 2010 Feb 19;396(2):441-51. Epub 2009 Dec 1. PMID:19961857[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Annalora AJ, Goodin DB, Hong WX, Zhang Q, Johnson EF, Stout CD. Crystal structure of CYP24A1, a mitochondrial cytochrome P450 involved in vitamin D metabolism. J Mol Biol. 2010 Feb 19;396(2):441-51. Epub 2009 Dec 1. PMID:19961857 doi:10.1016/j.jmb.2009.11.057
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