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4ieu

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Revision as of 09:02, 11 August 2016

Cys-persulfenate bound Cysteine Dioxygenase at pH 7.0 in the presence of Cys

Structural highlights

4ieu is a 1 chain structure with sequence from Buffalo rat. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	4ieo, 4iep, 4ieq, 4ier, 4ies, 4iet, 4iev, 4iew, 4iex, 4iey, 4iez, 4if0, 4if1
Gene:	Cdo1 (Buffalo rat)
Activity:	Cysteine dioxygenase, with EC number 1.13.11.20
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Publication Abstract from PubMed

Mammalian cysteine dioxygenase (CDO) is a mononuclear non-heme iron protein that catalyzes the conversion of cysteine (Cys) to cysteine sulfinic acid by an unclarified mechanism. One structural study revealed that a Cys-persulfenate (or Cys-persulfenic acid) formed in the active site, but quantum mechanical calculations have been used to support arguments that it is not an energetically feasible reaction intermediate. Here, we report a series of high-resolution structures of CDO soaked with Cys at pH values from 4 to 9. Cys binding is minimal at pH</=5 and persulfenate formation is consistently seen at pH values between 5.5 and 7. Also, a structure determined using laboratory-based X-ray diffraction shows that the persulfenate, with an apparent average O-O separation distance of ~1.8A, is not an artifact of synchrotron radiation. At pH>/=8, the active-site iron shifts from 4- to 5-coordinate, and Cys soaks reveal a complex with Cys, but no dioxygen, bound. This 'Cys-only' complex differs in detail from a previously published 'Cys-only' complex, which we reevaluate and conclude is not reliable. The high-resolution structures presented here do not resolve the CDO mechanism but do imply that an iron-bound persulfenate (or persulfenic acid) is energetically accessible in the CDO active site, and that CDO active-site chemistry in the crystals is influenced by protonation/deprotonation events with effective pKa values near ~5.5 and ~7.5 that influence Cys binding and oxygen binding/reactivity, respectively. Furthermore, this work provides reliable ligand-bound models for guiding future mechanistic considerations.

Cysteine Dioxygenase Structures from pH4 to 9: Consistent Cys-Persulfenate Formation at Intermediate pH and a Cys-Bound Enzyme at Higher pH.,Driggers CM, Cooley RB, Sankaran B, Hirschberger LL, Stipanuk MH, Karplus PA J Mol Biol. 2013 Jun 7. pii: S0022-2836(13)00358-6. doi:, 10.1016/j.jmb.2013.05.028. PMID:23747973^[1]

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

References

↑ Driggers CM, Cooley RB, Sankaran B, Hirschberger LL, Stipanuk MH, Karplus PA. Cysteine Dioxygenase Structures from pH4 to 9: Consistent Cys-Persulfenate Formation at Intermediate pH and a Cys-Bound Enzyme at Higher pH. J Mol Biol. 2013 Jun 7. pii: S0022-2836(13)00358-6. doi:, 10.1016/j.jmb.2013.05.028. PMID:23747973 doi:10.1016/j.jmb.2013.05.028

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

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

@@ Line 1: / Line 1: @@
 ==Cys-persulfenate bound Cysteine Dioxygenase at pH 7.0 in the presence of Cys==
 <StructureSection load='4ieu' size='340' side='right' caption='[[4ieu]], [[Resolution|resolution]] 1.25&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4ieu]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4IEU OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4IEU FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4ieu]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4IEU OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4IEU FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=2CO:S-HYDROPEROXYCYSTEINE'>2CO</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene></td></tr>
 <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]], [[4iev|4iev]], [[4iew|4iew]], [[4iex|4iex]], [[4iey|4iey]], [[4iez|4iez]], [[4if0|4if0]], [[4if1|4if1]]</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Cdo1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Rattus norvegicus])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Cdo1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat])</td></tr>
 <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>
-<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=4ieu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ieu OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4ieu RCSB], [http://www.ebi.ac.uk/pdbsum/4ieu 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=4ieu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ieu OCA], [http://pdbe.org/4ieu PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4ieu RCSB], [http://www.ebi.ac.uk/pdbsum/4ieu PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4ieu ProSAT]</span></td></tr>
 </table>
 <div style="background-color:#fffaf0;">
@@ Line 17: / Line 18: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4ieu" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 24: / Line 26: @@
 __TOC__
 </StructureSection>
+[[Category: Buffalo rat]]
 [[Category: Cysteine dioxygenase]]
-[[Category: Rattus norvegicus]]
 [[Category: Cooley, R B]]
 [[Category: Driggers, C M]]

4ieu

From Proteopedia

Revision as of 09:02, 11 August 2016

Cys-persulfenate bound Cysteine Dioxygenase at pH 7.0 in the presence of Cys

Structural highlights

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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