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| | ==Role of a Glutamate Bridge Spanning the Dimeric Interface of Human Manganese Superoxide Dismutase== | | ==Role of a Glutamate Bridge Spanning the Dimeric Interface of Human Manganese Superoxide Dismutase== |
| - | <StructureSection load='3c3t' size='340' side='right' caption='[[3c3t]], [[Resolution|resolution]] 2.20Å' scene=''> | + | <StructureSection load='3c3t' size='340' side='right'caption='[[3c3t]], [[Resolution|resolution]] 2.20Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3c3t]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C3T OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3C3T FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3c3t]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C3T OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3C3T FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3c3s|3c3s]]</td></tr> | + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3c3s|3c3s]]</div></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SOD2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> | + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SOD2 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Superoxide_dismutase Superoxide dismutase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.15.1.1 1.15.1.1] </span></td></tr> | + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Superoxide_dismutase Superoxide dismutase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.15.1.1 1.15.1.1] </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=3c3t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c3t OCA], [http://pdbe.org/3c3t PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3c3t RCSB], [http://www.ebi.ac.uk/pdbsum/3c3t PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3c3t 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=3c3t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c3t OCA], [https://pdbe.org/3c3t PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3c3t RCSB], [https://www.ebi.ac.uk/pdbsum/3c3t PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3c3t ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Disease == | | == Disease == |
| - | [[http://www.uniprot.org/uniprot/SODM_HUMAN SODM_HUMAN]] Genetic variation in SOD2 is associated with susceptibility to microvascular complications of diabetes type 6 (MVCD6) [MIM:[http://omim.org/entry/612634 612634]]. These are pathological conditions that develop in numerous tissues and organs as a consequence of diabetes mellitus. They include diabetic retinopathy, diabetic nephropathy leading to end-stage renal disease, and diabetic neuropathy. Diabetic retinopathy remains the major cause of new-onset blindness among diabetic adults. It is characterized by vascular permeability and increased tissue ischemia and angiogenesis. | + | [[https://www.uniprot.org/uniprot/SODM_HUMAN SODM_HUMAN]] Genetic variation in SOD2 is associated with susceptibility to microvascular complications of diabetes type 6 (MVCD6) [MIM:[https://omim.org/entry/612634 612634]]. These are pathological conditions that develop in numerous tissues and organs as a consequence of diabetes mellitus. They include diabetic retinopathy, diabetic nephropathy leading to end-stage renal disease, and diabetic neuropathy. Diabetic retinopathy remains the major cause of new-onset blindness among diabetic adults. It is characterized by vascular permeability and increased tissue ischemia and angiogenesis. |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/SODM_HUMAN SODM_HUMAN]] Destroys superoxide anion radicals which are normally produced within the cells and which are toxic to biological systems.<ref>PMID:10334867</ref> | + | [[https://www.uniprot.org/uniprot/SODM_HUMAN SODM_HUMAN]] Destroys superoxide anion radicals which are normally produced within the cells and which are toxic to biological systems.<ref>PMID:10334867</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | ==See Also== | | ==See Also== |
| - | *[[Superoxide Dismutase|Superoxide Dismutase]] | + | *[[Superoxide dismutase 3D structures|Superoxide dismutase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Human]] | | [[Category: Human]] |
| | + | [[Category: Large Structures]] |
| | [[Category: Superoxide dismutase]] | | [[Category: Superoxide dismutase]] |
| | [[Category: Cabelli, D E]] | | [[Category: Cabelli, D E]] |
| Structural highlights
Disease
[SODM_HUMAN] Genetic variation in SOD2 is associated with susceptibility to microvascular complications of diabetes type 6 (MVCD6) [MIM:612634]. These are pathological conditions that develop in numerous tissues and organs as a consequence of diabetes mellitus. They include diabetic retinopathy, diabetic nephropathy leading to end-stage renal disease, and diabetic neuropathy. Diabetic retinopathy remains the major cause of new-onset blindness among diabetic adults. It is characterized by vascular permeability and increased tissue ischemia and angiogenesis.
Function
[SODM_HUMAN] Destroys superoxide anion radicals which are normally produced within the cells and which are toxic to biological systems.[1]
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 function in the structure, stability, and catalysis of the interfaces between subunits in manganese superoxide dismutase (MnSOD) is currently under scrutiny. Glu162 in homotetrameric human MnSOD spans a dimeric interface and forms a hydrogen bond with His163 of an adjacent subunit which is a direct ligand of the manganese. We have examined the properties of two site-specific mutants of human MnSOD in which Glu162 is replaced with Asp (E162D) and Ala (E162A). The X-ray crystal structures of E162D and E162A MnSOD reveal no significant structural changes compared with the wild type other than the removal of the hydrogen bond interaction with His163 in E162A MnSOD. In the case of E162D MnSOD, an intervening solvent molecule fills the void created by the mutation to conserve the hydrogen bond interaction between His163 and residue 162. These mutants retain their tetrameric structure and their specificity for manganese over iron. Each has catalytic activity in the disproportionation of superoxide that is typically 5-25% of that of the wild-type enzyme and a level of product inhibition greater by approximately 2-fold. Differential scanning calorimetry indicates that the hydrogen bond between Glu162 and His163 contributes to the stability of MnSOD, with the major unfolding transition occurring at 81 degrees C for E162A compared to 90 degrees C for wild-type MnSOD. These results suggest that Glu162 at the tetrameric interface in human MnSOD supports stability and efficient catalysis and has a significant role in regulating product inhibition.
Role of a Glutamate Bridge Spanning the Dimeric Interface of Human Manganese Superoxide Dismutase(,).,Quint PS, Domsic JF, Cabelli DE, McKenna R, Silverman DN Biochemistry. 2008 Mar 29;. PMID:18373354[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ MacMillan-Crow LA, Thompson JA. Tyrosine modifications and inactivation of active site manganese superoxide dismutase mutant (Y34F) by peroxynitrite. Arch Biochem Biophys. 1999 Jun 1;366(1):82-8. PMID:10334867 doi:S0003-9861(99)91202-X
- ↑ Quint PS, Domsic JF, Cabelli DE, McKenna R, Silverman DN. Role of a Glutamate Bridge Spanning the Dimeric Interface of Human Manganese Superoxide Dismutase(,). Biochemistry. 2008 Mar 29;. PMID:18373354 doi:http://dx.doi.org/10.1021/bi7024518
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