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4xf9

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==cysteine dioxygenase variant - C93A at pH 8.0 in complex with homocysteine==
==cysteine dioxygenase variant - C93A at pH 8.0 in complex with homocysteine==
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<StructureSection load='4xf9' size='340' side='right' caption='[[4xf9]], [[Resolution|resolution]] 1.30&Aring;' scene=''>
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<StructureSection load='4xf9' size='340' side='right'caption='[[4xf9]], [[Resolution|resolution]] 1.30&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[4xf9]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4XF9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4XF9 FirstGlance]. <br>
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<table><tr><td colspan='2'>[[4xf9]] is a 1 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=4XF9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4XF9 FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=HCS:2-AMINO-4-MERCAPTO-BUTYRIC+ACID'>HCS</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.3&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4ieo|4ieo]], [[4iep|4iep]], [[4ieq|4ieq]], [[4ier|4ier]], [[4ies|4ies]], [[4iet|4iet]], [[4ieu|4ieu]], [[4iev|4iev]], [[4iew|4iew]], [[4iex|4iex]], [[4iey|4iey]], [[4iez|4iez]], [[4jtn|4jtn]], [[4jto|4jto]], [[4kwk|4kwk]], [[4kwl|4kwl]], [[4pix|4pix]], [[4piy|4piy]], [[4piz|4piz]], [[4pjy|4pjy]], [[4ext|4ext]], [[4xez|4xez]], [[4xf0|4xf0]], [[4xf1|4xf1]], [[4xf3|4xf3]], [[4xf4|4xf4]], [[4xfb|4xfb]], [[4xfc|4xfc]], [[4xff|4xff]], [[4xfg|4xfg]], [[4xfh|4xfh]], [[4xfi|4xfi]]</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=HCS:2-AMINO-4-MERCAPTO-BUTYRIC+ACID'>HCS</scene></td></tr>
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<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Cysteine_dioxygenase Cysteine dioxygenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.13.11.20 1.13.11.20] </span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4xf9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4xf9 OCA], [https://pdbe.org/4xf9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4xf9 RCSB], [https://www.ebi.ac.uk/pdbsum/4xf9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4xf9 ProSAT]</span></td></tr>
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<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=4xf9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4xf9 OCA], [http://pdbe.org/4xf9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4xf9 RCSB], [http://www.ebi.ac.uk/pdbsum/4xf9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4xf9 ProSAT]</span></td></tr>
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</table>
</table>
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<div style="background-color:#fffaf0;">
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== Function ==
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== Publication Abstract from PubMed ==
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[https://www.uniprot.org/uniprot/CDO1_RAT CDO1_RAT]
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In mammals, the non-heme iron enzyme cysteine dioxygenase (CDO) helps regulate Cys levels through converting Cys to Cys sulfinic acid. Its activity is in part modulated by the formation of a Cys93-Tyr157 crosslink that increases its catalytic efficiency over 10-fold. Here, 21 high-resolution mammalian CDO structures are used to gain insight into how the Cys-Tyr crosslink promotes activity and how select competitive inhibitors bind. Crystal structures of crosslink-deficient C93A and Y157F variants reveal similar ~1.0-A shifts in the side chain of residue 157, and both variant structures have a new chloride ion coordinating the active site iron. Cys binding is also different from wild-type CDO, and no Cys-persulfenate forms in the C93A or Y157F active sites at pH6.2 or 8.0. We conclude that the crosslink enhances activity by positioning the Tyr157 hydroxyl to enable proper Cys binding, proper oxygen binding, and optimal chemistry. In addition, structures are presented for homocysteine (Hcy), D-Cys, thiosulfate, and azide bound as competitive inhibitors. The observed binding modes of Hcy and D-Cys clarify why they are not substrates, and the binding of azide shows that in contrast to what has been proposed, it does not bind in these crystals as a superoxide mimic.
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Structure-Based Insights into the Role of the Cys-Tyr Crosslink and Inhibitor Recognition by Mammalian Cysteine Dioxygenase.,Driggers CM, Kean KM, Hirschberger LL, Cooley RB, Stipanuk MH, Karplus PA J Mol Biol. 2016 Oct 9;428(20):3999-4012. doi: 10.1016/j.jmb.2016.07.012. Epub, 2016 Jul 29. PMID:27477048<ref>PMID:27477048</ref>
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==See Also==
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*[[Dioxygenase 3D structures|Dioxygenase 3D structures]]
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 4xf9" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Cysteine dioxygenase]]
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[[Category: Large Structures]]
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[[Category: Driggers, C M]]
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[[Category: Rattus norvegicus]]
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[[Category: Karplus, P A]]
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[[Category: Driggers CM]]
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[[Category: Cupin fold]]
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[[Category: Karplus PA]]
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[[Category: Cysteine to cysteine sulfinic acid catalysis]]
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[[Category: Oxidoreductase]]
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[[Category: Thiol dioxygenase]]
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Current revision

cysteine dioxygenase variant - C93A at pH 8.0 in complex with homocysteine

PDB ID 4xf9

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