5ww9

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==Crystal structure of R73E mutant of the second DNA-Binding protein under starvation from Mycobacterium smegmatis==
==Crystal structure of R73E mutant of the second DNA-Binding protein under starvation from Mycobacterium smegmatis==
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<StructureSection load='5ww9' size='340' side='right' caption='[[5ww9]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
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<StructureSection load='5ww9' size='340' side='right'caption='[[5ww9]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[5ww9]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5WW9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5WW9 FirstGlance]. <br>
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<table><tr><td colspan='2'>[[5ww9]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycolicibacterium_smegmatis_MC2_155 Mycolicibacterium smegmatis MC2 155]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5WW9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5WW9 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=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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]] 2&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5ww3|5ww3]], [[5ww4|5ww4]], [[5ww5|5ww5]], [[5ww6|5ww6]], [[5ww7|5ww7]], [[5ww8|5ww8]]</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=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></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=5ww9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ww9 OCA], [http://pdbe.org/5ww9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5ww9 RCSB], [http://www.ebi.ac.uk/pdbsum/5ww9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5ww9 ProSAT]</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=5ww9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ww9 OCA], [https://pdbe.org/5ww9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5ww9 RCSB], [https://www.ebi.ac.uk/pdbsum/5ww9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5ww9 ProSAT]</span></td></tr>
</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/A0QXB7_MYCS2 A0QXB7_MYCS2]
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DNA-binding proteins under starvation (Dps) are dodecameric nano-compartments for iron oxidation and storage in bacterial cells. These proteins have roughly spherical structures with a hollow interior where iron is stored. Through mutational analysis of a conserved arginine residue in the second Dps protein from Mycobacterium smegmatis, we have identified residues which stabilize the interfaces between the iron entry and ferroxidation sites. Also, we have used X-ray crystallography to determine the structures of co-crystals of iron and Dps in varying proportions and compare the changes in these ligand-bound forms with respect to the apo-protein. The iron-loaded proteins of low, medium and high iron-bound forms were found to exhibit aspartate residues with alternate conformations, some of which could be directly linked to the sites of ferroxidation and iron entry. We conclude that the increased flexibility of aspartates in the presence of iron facilitates its movement from the entry site to the ferroxidaton site, and the two active sites are stabilized by the interactions of a conserved arginine residue R73.
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Flexible aspartates propel iron to the ferroxidation sites along pathways stabilized by a conserved arginine in Dps proteins from Mycobacterium smegmatis.,Williams SM, Chatterji D Metallomics. 2017 Jun 21;9(6):685-698. doi: 10.1039/c7mt00008a. PMID:28418062<ref>PMID:28418062</ref>
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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 5ww9" 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: Chatterji, D]]
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[[Category: Large Structures]]
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[[Category: Williams, S M]]
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[[Category: Mycolicibacterium smegmatis MC2 155]]
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[[Category: Dna binding]]
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[[Category: Chatterji D]]
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[[Category: Dna binding protein]]
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[[Category: Williams SM]]
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[[Category: Ferritin-like fold]]
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[[Category: Ferroxidation]]
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[[Category: Oxidoreductase]]
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Current revision

Crystal structure of R73E mutant of the second DNA-Binding protein under starvation from Mycobacterium smegmatis

PDB ID 5ww9

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