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| | <StructureSection load='1m6t' size='340' side='right'caption='[[1m6t]], [[Resolution|resolution]] 1.81Å' scene=''> | | <StructureSection load='1m6t' size='340' side='right'caption='[[1m6t]], [[Resolution|resolution]] 1.81Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1m6t]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M6T OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1M6T FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1m6t]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M6T OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1M6T FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</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]] 1.81Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[256b|256b]]</div></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">cytB562 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</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=1m6t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1m6t OCA], [https://pdbe.org/1m6t PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1m6t RCSB], [https://www.ebi.ac.uk/pdbsum/1m6t PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1m6t 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=1m6t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1m6t OCA], [https://pdbe.org/1m6t PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1m6t RCSB], [https://www.ebi.ac.uk/pdbsum/1m6t PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1m6t ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/C562_ECOLX C562_ECOLX]] Electron-transport protein of unknown function.
| + | [https://www.uniprot.org/uniprot/C562_ECOLX C562_ECOLX] Electron-transport protein of unknown function. |
| | == 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: Bacillus coli migula 1895]] | + | [[Category: Escherichia coli]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Andrykovitch, M]] | + | [[Category: Andrykovitch M]] |
| - | [[Category: Bai, Y]] | + | [[Category: Bai Y]] |
| - | [[Category: Chu, R]] | + | [[Category: Chu R]] |
| - | [[Category: Ji, X]] | + | [[Category: Ji X]] |
| - | [[Category: Kajava, A V]] | + | [[Category: Kajava AV]] |
| - | [[Category: Knowlton, J R]] | + | [[Category: Knowlton JR]] |
| - | [[Category: Pei, W]] | + | [[Category: Pei W]] |
| - | [[Category: Steinbach, P J]] | + | [[Category: Steinbach PJ]] |
| - | [[Category: Takei, J]] | + | [[Category: Takei J]] |
| - | [[Category: Electron transport]]
| + | |
| - | [[Category: Protein design]]
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| Structural highlights
Function
C562_ECOLX Electron-transport protein of unknown function.
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
To test whether it is practical to use phage display coupled with proteolysis for protein design, we used this approach to convert a partially unfolded four-helix bundle protein, apocytochrome b(562), to a stably folded four-helix bundle protein. Four residues expected to form a hydrophobic core were mutated. One residue was changed to Trp to provide a fluorescence probe for studying the protein's physical properties and to partially fill the void left by the heme. The other three positions were randomly mutated. In addition, another residue in the region to be redesigned was substituted with Arg to provide a specific cutting site for protease Arg-c. This library of mutants was displayed on the surface of phage and challenged with protease Arg-c to select stably folded proteins. The consensus sequence that emerged from the selection included hydrophobic residues at only one of the three positions and non-hydrophobic residues at the other two. Nevertheless, the selected proteins were thermodynamically very stable. The structure of a selected protein was characterized using multi-dimensional NMR. All four helices were formed in the structure. Further, site-directed mutagenesis was used to change one of the two non-hydrophobic residues to a hydrophobic residue, which increased the stability of the protein, indicating that the selection result was not based solely on the protein's global stability and that local structural characteristics may also govern the selection. This conclusion is supported by the crystal structure of another mutant that has two hydrophobic residues substituted for the two non-hydrophobic residues. These results suggest that the hydrophobic interactions in the core are not sufficient to dictate the selection and that the location of the cutting site of the protease also influences the selection of structures.
Redesign of a four-helix bundle protein by phage display coupled with proteolysis and structural characterization by NMR and X-ray crystallography.,Chu R, Takei J, Knowlton JR, Andrykovitch M, Pei W, Kajava AV, Steinbach PJ, Ji X, Bai Y J Mol Biol. 2002 Oct 18;323(2):253-62. PMID:12381319[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Chu R, Takei J, Knowlton JR, Andrykovitch M, Pei W, Kajava AV, Steinbach PJ, Ji X, Bai Y. Redesign of a four-helix bundle protein by phage display coupled with proteolysis and structural characterization by NMR and X-ray crystallography. J Mol Biol. 2002 Oct 18;323(2):253-62. PMID:12381319
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