View source for 4qm9


==Crystal Structure of a Putative Cysteine Dioxygenase From Bacillus subtilis with Cys-bound==
<StructureSection load='4qm9' size='340' side='right'caption='[[4qm9]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4qm9]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_subtilis_subsp._subtilis_str._168 Bacillus subtilis subsp. subtilis str. 168]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4QM9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4QM9 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CYS:CYSTEINE'>CYS</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene></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=4qm9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4qm9 OCA], [https://pdbe.org/4qm9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4qm9 RCSB], [https://www.ebi.ac.uk/pdbsum/4qm9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4qm9 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CDOA_BACSU CDOA_BACSU] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
In some bacteria, cysteine is converted to cysteine sulfinic acid by cysteine dioxygenases (CDO) that are only approximately 15-30% identical in sequence to mammalian CDOs. Among bacterial proteins having this range of sequence similarity to mammalian CDO are some that conserve an active site Arg residue ("Arg-type" enzymes) and some having a Gln substituted for this Arg ("Gln-type" enzymes). Here, we describe a structure from each of these enzyme types by analyzing structures originally solved by structural genomics groups but not published: a Bacillus subtilis "Arg-type" enzyme that has cysteine dioxygenase activity (BsCDO), and a Ralstonia eutropha "Gln-type" CDO homolog of uncharacterized activity (ReCDOhom). The BsCDO active site is well conserved with mammalian CDO, and a cysteine complex captured in the active site confirms that the cysteine binding mode is also similar. The ReCDOhom structure reveals a new active site Arg residue that is hydrogen bonding to an iron-bound diatomic molecule we have interpreted as dioxygen. Notably, the Arg position is not compatible with the mode of Cys binding seen in both rat CDO and BsCDO. As sequence alignments show that this newly discovered active site Arg is well conserved among "Gln-type" CDO enzymes, we conclude that the "Gln-type" CDO homologs are not authentic CDOs but will have substrate specificity more similar to 3-mercaptopropionate dioxygenases.

Structures of Arg- and Gln-type bacterial cysteine dioxygenase homologs.,Driggers CM, Hartman SJ, Karplus PA Protein Sci. 2014 Oct 11. doi: 10.1002/pro.2587. PMID:25307852<ref>PMID:25307852</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4qm9" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Bacillus subtilis subsp. subtilis str. 168]]
[[Category: Large Structures]]
[[Category: Driggers CM]]
[[Category: Hartman SH]]
[[Category: Karplus PA]]