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| | ==Crystal structure of murine Ngb under Xe pressure== | | ==Crystal structure of murine Ngb under Xe pressure== |
| - | <StructureSection load='3gk9' size='340' side='right' caption='[[3gk9]], [[Resolution|resolution]] 1.80Å' scene=''> | + | <StructureSection load='3gk9' size='340' side='right'caption='[[3gk9]], [[Resolution|resolution]] 1.80Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3gk9]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3GK9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3GK9 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3gk9]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3GK9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3GK9 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=XE:XENON'>XE</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]] 1.8Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3gkt|3gkt]], [[3gln|3gln]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=XE:XENON'>XE</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Ngb ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</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=3gk9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3gk9 OCA], [https://pdbe.org/3gk9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3gk9 RCSB], [https://www.ebi.ac.uk/pdbsum/3gk9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3gk9 ProSAT]</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=3gk9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3gk9 OCA], [http://pdbe.org/3gk9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3gk9 RCSB], [http://www.ebi.ac.uk/pdbsum/3gk9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3gk9 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/NGB_MOUSE NGB_MOUSE]] Involved in oxygen transport in the brain. Hexacoordinate globin, displaying competitive binding of oxygen or the distal His residue to the iron atom. Not capable of penetrating cell membranes. The deoxygenated form exhibits nitrite reductase activity inhibiting cellular respiration via NO-binding to cytochrome c oxidase. Involved in neuroprotection during oxidative stress. May exert its anti-apoptotic activity by acting to reset the trigger level of mitochondrial cytochrome c release necessary to commit the cells to apoptosis.<ref>PMID:11473111</ref> <ref>PMID:11473128</ref> | + | [https://www.uniprot.org/uniprot/NGB_MOUSE NGB_MOUSE] Involved in oxygen transport in the brain. Hexacoordinate globin, displaying competitive binding of oxygen or the distal His residue to the iron atom. Not capable of penetrating cell membranes. The deoxygenated form exhibits nitrite reductase activity inhibiting cellular respiration via NO-binding to cytochrome c oxidase. Involved in neuroprotection during oxidative stress. May exert its anti-apoptotic activity by acting to reset the trigger level of mitochondrial cytochrome c release necessary to commit the cells to apoptosis.<ref>PMID:11473111</ref> <ref>PMID:11473128</ref> |
| | == 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: Lk3 transgenic mice]] | + | [[Category: Large Structures]] |
| - | [[Category: Brunori, M]] | + | [[Category: Mus musculus]] |
| - | [[Category: Moschetti, T]] | + | [[Category: Brunori M]] |
| - | [[Category: Mueller, U]] | + | [[Category: Moschetti T]] |
| - | [[Category: Schultze, J]] | + | [[Category: Mueller U]] |
| - | [[Category: Vallone, B]] | + | [[Category: Schultze J]] |
| - | [[Category: Globin fold]]
| + | [[Category: Vallone B]] |
| - | [[Category: Heme]]
| + | |
| - | [[Category: Iron]]
| + | |
| - | [[Category: Metal-binding]]
| + | |
| - | [[Category: Oxygen storage-transport protein complex]]
| + | |
| - | [[Category: Oxygen transport]]
| + | |
| - | [[Category: Transport]]
| + | |
| - | [[Category: Xenon site]]
| + | |
| Structural highlights
Function
NGB_MOUSE Involved in oxygen transport in the brain. Hexacoordinate globin, displaying competitive binding of oxygen or the distal His residue to the iron atom. Not capable of penetrating cell membranes. The deoxygenated form exhibits nitrite reductase activity inhibiting cellular respiration via NO-binding to cytochrome c oxidase. Involved in neuroprotection during oxidative stress. May exert its anti-apoptotic activity by acting to reset the trigger level of mitochondrial cytochrome c release necessary to commit the cells to apoptosis.[1] [2]
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
Neuroglobin (Ngb) is a hexacoordinate globin expressed in the brain of vertebrates. Ferrous Ngb binds dioxygen with high affinity and the O(2) adduct is able to scavenge NO. Convincing in vitro and in vivo data indicate that Ngb is involved in neuroprotection during hypoxia and ischemia. The 3D structure of Ngb reveals the presence of a wide internal cavity connecting its heme active site with the bulk. To explore the role of this "tunnel" in the control of ligand binding, we determined the structure of metNgb and NgbCO equilibrated with Xe or Kr. We show four docking sites for Xe (only two for Kr); two of the four Xe sites are within the large cavity. They are only partially conserved in globins, since the two proximal Xe sites identified in myoglobin (Xe1 and Xe2) are absent in Ngb, as well as in cytoglobin. The Xe docking sites in Ngb map a pathway within the protein matrix, leading to the heme, which becomes more accessible in the ligand-bound species. This may be of significance in connection with the redox chemistry that may be the primary function of this hexacoordinate globin.
The structure of neuroglobin at high Xe and Kr pressure reveals partial conservation of globin internal cavities.,Moschetti T, Mueller U, Schulze J, Brunori M, Vallone B Biophys J. 2009 Sep 16;97(6):1700-8. doi: 10.1016/j.bpj.2009.05.059. PMID:19751675[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Couture M, Burmester T, Hankeln T, Rousseau DL. The heme environment of mouse neuroglobin. Evidence for the presence of two conformations of the heme pocket. J Biol Chem. 2001 Sep 28;276(39):36377-82. Epub 2001 Jul 25. PMID:11473111 doi:http://dx.doi.org/10.1074/jbc.M103907200
- ↑ Dewilde S, Kiger L, Burmester T, Hankeln T, Baudin-Creuza V, Aerts T, Marden MC, Caubergs R, Moens L. Biochemical characterization and ligand binding properties of neuroglobin, a novel member of the globin family. J Biol Chem. 2001 Oct 19;276(42):38949-55. Epub 2001 Jul 25. PMID:11473128 doi:http://dx.doi.org/10.1074/jbc.M106438200
- ↑ Moschetti T, Mueller U, Schulze J, Brunori M, Vallone B. The structure of neuroglobin at high Xe and Kr pressure reveals partial conservation of globin internal cavities. Biophys J. 2009 Sep 16;97(6):1700-8. doi: 10.1016/j.bpj.2009.05.059. PMID:19751675 doi:http://dx.doi.org/10.1016/j.bpj.2009.05.059
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