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| | ==Selenomethionine Ca2+-Calmodulin from Paramecium tetraurelia SAD data== | | ==Selenomethionine Ca2+-Calmodulin from Paramecium tetraurelia SAD data== |
| - | <StructureSection load='5e1k' size='340' side='right' caption='[[5e1k]], [[Resolution|resolution]] 1.00Å' scene=''> | + | <StructureSection load='5e1k' size='340' side='right'caption='[[5e1k]], [[Resolution|resolution]] 1.00Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5e1k]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Parte Parte]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5E1K OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5E1K FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5e1k]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Paramecium_tetraurelia Paramecium tetraurelia]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5E1K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5E1K FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MPD:(4S)-2-METHYL-2,4-PENTANEDIOL'>MPD</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]] 1Å</td></tr> |
| - | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MPD:(4S)-2-METHYL-2,4-PENTANEDIOL'>MPD</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5e1n|5e1n]], [[5e1p|5e1p]]</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=5e1k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5e1k OCA], [https://pdbe.org/5e1k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5e1k RCSB], [https://www.ebi.ac.uk/pdbsum/5e1k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5e1k ProSAT]</span></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CAM, GSPATT00015825001 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=5888 PARTE])</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=5e1k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5e1k OCA], [http://pdbe.org/5e1k PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5e1k RCSB], [http://www.ebi.ac.uk/pdbsum/5e1k PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5e1k ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/CALM_PARTE CALM_PARTE]] Calmodulin mediates the control of a large number of enzymes, ion channels and other proteins by Ca(2+). Among the enzymes to be stimulated by the calmodulin-Ca(2+) complex are a number of protein kinases and phosphatases. | + | [https://www.uniprot.org/uniprot/CALM_PARTE CALM_PARTE] Calmodulin mediates the control of a large number of enzymes, ion channels and other proteins by Ca(2+). Among the enzymes to be stimulated by the calmodulin-Ca(2+) complex are a number of protein kinases and phosphatases. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </div> | | </div> |
| | <div class="pdbe-citations 5e1k" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 5e1k" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Calmodulin 3D structures|Calmodulin 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Parte]] | + | [[Category: Large Structures]] |
| - | [[Category: Bedem, H van den]] | + | [[Category: Paramecium tetraurelia]] |
| - | [[Category: Brunger, A T]] | + | [[Category: Brunger AT]] |
| - | [[Category: Lin, J]] | + | [[Category: Lin J]] |
| - | [[Category: Wilson, M A]] | + | [[Category: Wilson MA]] |
| - | [[Category: Calcium binding]] | + | [[Category: Van den Bedem H]] |
| - | [[Category: Calcium signaling]]
| + | |
| - | [[Category: Ef hand]]
| + | |
| - | [[Category: Metal binding protein]]
| + | |
| Structural highlights
Function
CALM_PARTE Calmodulin mediates the control of a large number of enzymes, ion channels and other proteins by Ca(2+). Among the enzymes to be stimulated by the calmodulin-Ca(2+) complex are a number of protein kinases and phosphatases.
Publication Abstract from PubMed
Calmodulin (CaM) is the primary calcium signaling protein in eukaryotes and has been extensively studied using various biophysical techniques. Prior crystal structures have noted the presence of ambiguous electron density in both hydrophobic binding pockets of Ca(2+)-CaM, but no assignment of these features has been made. In addition, Ca(2+)-CaM samples many conformational substates in the crystal and accurately modeling the full range of this functionally important disorder is challenging. In order to characterize these features in a minimally biased manner, a 1.0 A resolution single-wavelength anomalous diffraction data set was measured for selenomethionine-substituted Ca(2+)-CaM. Density-modified electron-density maps enabled the accurate assignment of Ca(2+)-CaM main-chain and side-chain disorder. These experimental maps also substantiate complex disorder models that were automatically built using low-contour features of model-phased electron density. Furthermore, experimental electron-density maps reveal that 2-methyl-2,4-pentanediol (MPD) is present in the C-terminal domain, mediates a lattice contact between N-terminal domains and may occupy the N-terminal binding pocket. The majority of the crystal structures of target-free Ca(2+)-CaM have been derived from crystals grown using MPD as a precipitant, and thus MPD is likely to be bound in functionally critical regions of Ca(2+)-CaM in most of these structures. The adventitious binding of MPD helps to explain differences between the Ca(2+)-CaM crystal and solution structures and is likely to favor more open conformations of the EF-hands in the crystal.
Atomic resolution experimental phase information reveals extensive disorder and bound 2-methyl-2,4-pentanediol in Ca(2+)-calmodulin.,Lin J, van den Bedem H, Brunger AT, Wilson MA Acta Crystallogr D Struct Biol. 2016 Jan;72(Pt 1):83-92. doi:, 10.1107/S2059798315021609. Epub 2016 Jan 1. PMID:26894537[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Lin J, van den Bedem H, Brunger AT, Wilson MA. Atomic resolution experimental phase information reveals extensive disorder and bound 2-methyl-2,4-pentanediol in Ca(2+)-calmodulin. Acta Crystallogr D Struct Biol. 2016 Jan;72(Pt 1):83-92. doi:, 10.1107/S2059798315021609. Epub 2016 Jan 1. PMID:26894537 doi:http://dx.doi.org/10.1107/S2059798315021609
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