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| | ==Embryonic Neural Inducing Factor Churchill is not a DNA-Binding Zinc Finger Protein: Solution Structure Reveals a Solvent-Exposed beta-Sheet and Zinc Binuclear Cluster== | | ==Embryonic Neural Inducing Factor Churchill is not a DNA-Binding Zinc Finger Protein: Solution Structure Reveals a Solvent-Exposed beta-Sheet and Zinc Binuclear Cluster== |
| - | <StructureSection load='2jox' size='340' side='right'caption='[[2jox]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | + | <StructureSection load='2jox' size='340' side='right'caption='[[2jox]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2jox]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JOX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2JOX FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2jox]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JOX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2JOX FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CHURC1, C14orf52, CHCH ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></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=2jox FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2jox OCA], [https://pdbe.org/2jox PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2jox RCSB], [https://www.ebi.ac.uk/pdbsum/2jox PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2jox 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=2jox FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2jox OCA], [https://pdbe.org/2jox PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2jox RCSB], [https://www.ebi.ac.uk/pdbsum/2jox PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2jox ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/CHUR_HUMAN CHUR_HUMAN]] Transcriptional activator that mediates FGF signaling during neural development. Plays a role in the regulation of cell movement (By similarity). Does not bind DNA by itself.
| + | [https://www.uniprot.org/uniprot/CHUR_HUMAN CHUR_HUMAN] Transcriptional activator that mediates FGF signaling during neural development. Plays a role in the regulation of cell movement (By similarity). Does not bind DNA by itself. |
| | == 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: Human]] | + | [[Category: Homo sapiens]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Buck-Koehntop, B A]] | + | [[Category: Buck-Koehntop BA]] |
| - | [[Category: Dyson, H]] | + | [[Category: Dyson H]] |
| - | [[Category: Gottesfeld, J M]] | + | [[Category: Gottesfeld JM]] |
| - | [[Category: Lee, B M]] | + | [[Category: Lee BM]] |
| - | [[Category: Martinez-Yamout, M A]] | + | [[Category: Martinez-Yamout MA]] |
| - | [[Category: Wright, P E]] | + | [[Category: Wright PE]] |
| - | [[Category: Protein]]
| + | |
| - | [[Category: Transcription]]
| + | |
| - | [[Category: Zinc]]
| + | |
| Structural highlights
Function
CHUR_HUMAN Transcriptional activator that mediates FGF signaling during neural development. Plays a role in the regulation of cell movement (By similarity). Does not bind DNA by itself.
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
Churchill is a zinc-containing protein that is involved in neural induction during embryogenesis. At the time of its discovery, it was thought on the basis of sequence alignment to contain two zinc fingers of the C4 type. Further, binding of an N-terminal GST-Churchill fusion protein to a particular DNA sequence was demonstrated by immunoprecipitation selection assay, suggesting that Churchill may function as a transcriptional regulator by sequence-specific DNA binding. We show by NMR solution structure determination that, far from containing canonical C4 zinc fingers, the protein contains three bound zinc ions in novel coordination sites, including an unusual binuclear zinc cluster. The secondary structure of Churchill is also unusual, consisting of a highly solvent-exposed single-layer beta-sheet. Hydrogen-deuterium exchange and backbone relaxation measurements reveal that Churchill is unusually dynamic on a number of time scales, with the exception of regions surrounding the zinc coordinating sites, which serve to stabilize the otherwise unstructured N terminus and the single-layer beta-sheet. No binding of Churchill to the previously identified DNA sequence could be detected, and extensive searches using DNA sequence selection techniques could find no other DNA sequence that was bound by Churchill. Since the N-terminal amino acids of Churchill form part of the zinc-binding motif, the addition of a fusion protein at the N terminus causes loss of zinc and unfolding of Churchill. This observation most likely explains the published DNA-binding results, which would arise due to non-specific interaction of the unfolded protein in the immunoprecipitation selection assay. Since Churchill does not appear to bind DNA, we suggest that it may function in embryogenesis as a protein-interaction factor.
Embryonic neural inducing factor churchill is not a DNA-binding zinc finger protein: solution structure reveals a solvent-exposed beta-sheet and zinc binuclear cluster.,Lee BM, Buck-Koehntop BA, Martinez-Yamout MA, Dyson HJ, Wright PE J Mol Biol. 2007 Aug 31;371(5):1274-89. Epub 2007 Jun 15. PMID:17610897[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Lee BM, Buck-Koehntop BA, Martinez-Yamout MA, Dyson HJ, Wright PE. Embryonic neural inducing factor churchill is not a DNA-binding zinc finger protein: solution structure reveals a solvent-exposed beta-sheet and zinc binuclear cluster. J Mol Biol. 2007 Aug 31;371(5):1274-89. Epub 2007 Jun 15. PMID:17610897 doi:10.1016/j.jmb.2007.06.021
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