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4u2t

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Revision as of 07:58, 22 March 2023

Cholesterol oxidase in the oxidised state complexed with isopropanol

Structural highlights

4u2t is a 1 chain structure with sequence from Streptomyces sp. SA-COO. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CHOD_STRS0 Bifunctional enzyme that catalyzes the oxidation of the 3-beta-hydroxy group of cholesterol and the isomerization of the double bond of the resulting product.

Publication Abstract from PubMed

Cholesterol oxidase (CO) is a flavoenzyme that catalyzes the oxidation and isomerization of cholesterol to cholest-4-en-3-one. The reductive half reaction occurs via a hydride transfer from the substrate to the FAD cofactor. The structures of CO reduced with dithionite under aerobic conditions and in the presence of the substrate 2-propanol under both aerobic and anaerobic conditions are presented. The 1.32 A resolution structure of the dithionite-reduced enzyme reveals a sulfite molecule covalently bound to the FAD cofactor. The isoalloxazine ring system displays a bent structure relative to that of the oxidized enzyme, and alternate conformations of a triad of aromatic residues near to the cofactor are evident. A 1.12 A resolution anaerobically trapped reduced enzyme structure in the presence of 2-propanol does not show a similar bending of the flavin ring system, but does show alternate conformations of the aromatic triad. Additionally, a significant difference electron-density peak is observed within a covalent-bond distance of N5 of the flavin moiety, suggesting that a hydride-transfer event has occurred as a result of substrate oxidation trapping the flavin in the electron-rich reduced state. The hydride transfer generates a tetrahedral geometry about the flavin N5 atom. High-level density-functional theory calculations were performed to correlate the crystallographic findings with the energetics of this unusual arrangement of the flavin moiety. These calculations suggest that strong hydrogen-bond interactions between Gly120 and the flavin N5 centre may play an important role in these structural features.

High-resolution structures of cholesterol oxidase in the reduced state provide insights into redox stabilization.,Golden E, Karton A, Vrielink A Acta Crystallogr D Biol Crystallogr. 2014 Dec 1;70(Pt 12):3155-66. doi:, 10.1107/S139900471402286X. Epub 2014 Nov 22. PMID:25478834^[1]

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

References

↑ Golden E, Karton A, Vrielink A. High-resolution structures of cholesterol oxidase in the reduced state provide insights into redox stabilization. Acta Crystallogr D Biol Crystallogr. 2014 Dec 1;70(Pt 12):3155-66. doi:, 10.1107/S139900471402286X. Epub 2014 Nov 22. PMID:25478834 doi:http://dx.doi.org/10.1107/S139900471402286X

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4u2t"

Categories: Large Structures | Streptomyces sp. SA-COO | Golden EA | Vrielink A

@@ Line 1: / Line 1: @@
 ==Cholesterol oxidase in the oxidised state complexed with isopropanol==
-<StructureSection load='4u2t' size='340' side='right' caption='[[4u2t]], [[Resolution|resolution]] 1.22&Aring;' scene=''>
+<StructureSection load='4u2t' size='340' side='right'caption='[[4u2t]], [[Resolution|resolution]] 1.22&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4u2t]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Strs0 Strs0]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4U2T OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4U2T FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4u2t]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptomyces_sp._SA-COO Streptomyces sp. SA-COO]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4U2T OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4U2T FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
-<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4u2l|4u2l]], [[4u2s|4u2s]]</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=4u2t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4u2t OCA], [https://pdbe.org/4u2t PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4u2t RCSB], [https://www.ebi.ac.uk/pdbsum/4u2t PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4u2t ProSAT]</span></td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">choA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=74576 STRS0])</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=4u2t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4u2t OCA], [http://pdbe.org/4u2t PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4u2t RCSB], [http://www.ebi.ac.uk/pdbsum/4u2t PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4u2t ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/CHOD_STRS0 CHOD_STRS0]] Bifunctional enzyme that catalyzes the oxidation of the 3-beta-hydroxy group of cholesterol and the isomerization of the double bond of the resulting product.
+[https://www.uniprot.org/uniprot/CHOD_STRS0 CHOD_STRS0] Bifunctional enzyme that catalyzes the oxidation of the 3-beta-hydroxy group of cholesterol and the isomerization of the double bond of the resulting product.
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 20: / Line 18: @@
 </div>
 <div class="pdbe-citations 4u2t" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Cholesterol oxidase|Cholesterol oxidase]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Strs0]]
+[[Category: Large Structures]]
-[[Category: Golden, E A]]
+[[Category: Streptomyces sp. SA-COO]]
-[[Category: Vrielink, A]]
+[[Category: Golden EA]]
-[[Category: Cholesterol oxidase]]
+[[Category: Vrielink A]]
-[[Category: Flavoenzyme]]
-[[Category: Isomerase]]
-[[Category: Oxidoreductase]]
-[[Category: Redox chemistry]]

4u2t

From Proteopedia

Revision as of 07:58, 22 March 2023

Cholesterol oxidase in the oxidised state complexed with isopropanol

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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