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| | ==FE-SOAKED CRYSTAL STRUCTURE OF THE DPS92 FROM DEINOCOCCUS RADIODURANS== | | ==FE-SOAKED CRYSTAL STRUCTURE OF THE DPS92 FROM DEINOCOCCUS RADIODURANS== |
| - | <StructureSection load='2c6r' size='340' side='right' caption='[[2c6r]], [[Resolution|resolution]] 2.10Å' scene=''> | + | <StructureSection load='2c6r' size='340' side='right'caption='[[2c6r]], [[Resolution|resolution]] 2.10Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2c6r]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Deira Deira]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2C6R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2C6R FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2c6r]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Deinococcus_radiodurans_R1 Deinococcus radiodurans R1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2C6R OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2C6R FirstGlance]. <br> |
| - | </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></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.1Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2c2j|2c2j]]</td></tr> | + | <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></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=2c6r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2c6r OCA], [http://pdbe.org/2c6r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2c6r RCSB], [http://www.ebi.ac.uk/pdbsum/2c6r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2c6r ProSAT]</span></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=2c6r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2c6r OCA], [https://pdbe.org/2c6r PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2c6r RCSB], [https://www.ebi.ac.uk/pdbsum/2c6r PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2c6r ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/DPS2_DEIRA DPS2_DEIRA]] Protects DNA from oxidative damage by sequestering intracellular Fe(2+) ion and storing it in the form of Fe(3+) oxyhydroxide mineral. One hydrogen peroxide oxidizes two Fe(2+) ions, which prevents hydroxyl radical production by the Fenton reaction (By similarity). | + | [https://www.uniprot.org/uniprot/DPS2_DEIRA DPS2_DEIRA] Protects DNA from oxidative damage by sequestering intracellular Fe(2+) ion and storing it in the form of Fe(3+) oxyhydroxide mineral. One hydrogen peroxide oxidizes two Fe(2+) ions, which prevents hydroxyl radical production by the Fenton reaction (By similarity). |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Deira]] | + | [[Category: Deinococcus radiodurans R1]] |
| - | [[Category: Cuypers, M G]] | + | [[Category: Large Structures]] |
| - | [[Category: Mcsweeney, S]] | + | [[Category: Cuypers MG]] |
| - | [[Category: Mitchell, E]] | + | [[Category: Mcsweeney S]] |
| - | [[Category: Romao, C V]] | + | [[Category: Mitchell E]] |
| - | [[Category: Deinococcus]] | + | [[Category: Romao CV]] |
| - | [[Category: Dna binding protein]]
| + | |
| - | [[Category: Dna-binding protein]]
| + | |
| - | [[Category: Dp]]
| + | |
| - | [[Category: Radioduran]]
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| Structural highlights
Function
DPS2_DEIRA Protects DNA from oxidative damage by sequestering intracellular Fe(2+) ion and storing it in the form of Fe(3+) oxyhydroxide mineral. One hydrogen peroxide oxidizes two Fe(2+) ions, which prevents hydroxyl radical production by the Fenton reaction (By similarity).
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The crystal structure of recombinant Dps2 (DRB0092, DNA protecting protein under starved conditions) from the Gram-positive, radiation-resistant bacterium Deinococcus radiodurans has been determined in its apo and iron loaded states. Like other members of the Dps family, the bacterial DrDps2 assembles as a spherical dodecamer with an outer shell diameter of 90 A and an interior diameter of 40 A. A total of five iron sites were located in the iron loaded structure, representing the first stages of iron biomineralisation. Each subunit contains a mononuclear iron ferroxidase centre coordinated by residues highly conserved amongst the Dps family of proteins. In the structures presented, a distinct iron site is observed 6.1 A from the ferroxidase centre with a unique ligand configuration of mono coordination by the protein and no bridging ligand to the ferroxidase centre. A non-specific metallic binding site, suspected to play a regulative role in iron uptake/release from the cage, was found in a pocket located near to the external edge of the C-terminal 3-fold channel.
The crystal structure of the Dps2 from Deinococcus radiodurans reveals an unusual pore profile with a non-specific metal binding site.,Cuypers MG, Mitchell EP, Romao CV, McSweeney SM J Mol Biol. 2007 Aug 17;371(3):787-99. Epub 2006 Nov 11. PMID:17583727[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Cuypers MG, Mitchell EP, Romao CV, McSweeney SM. The crystal structure of the Dps2 from Deinococcus radiodurans reveals an unusual pore profile with a non-specific metal binding site. J Mol Biol. 2007 Aug 17;371(3):787-99. Epub 2006 Nov 11. PMID:17583727 doi:http://dx.doi.org/10.1016/j.jmb.2006.11.032
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