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| | <StructureSection load='1u6r' size='340' side='right'caption='[[1u6r]], [[Resolution|resolution]] 1.65Å' scene=''> | | <StructureSection load='1u6r' size='340' side='right'caption='[[1u6r]], [[Resolution|resolution]] 1.65Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1u6r]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/European_rabbit European rabbit]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1U6R OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1U6R FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1u6r]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1U6R OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1U6R FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=IOM:(DIAMINOMETHYL-METHYL-AMINO)-ACETIC+ACID'>IOM</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NO3:NITRATE+ION'>NO3</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]] 1.65Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1crk|1crk]]</div></td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=IOM:(DIAMINOMETHYL-METHYL-AMINO)-ACETIC+ACID'>IOM</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NO3:NITRATE+ION'>NO3</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CKM ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9986 European rabbit])</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=1u6r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1u6r OCA], [https://pdbe.org/1u6r PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1u6r RCSB], [https://www.ebi.ac.uk/pdbsum/1u6r PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1u6r ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Creatine_kinase Creatine kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.3.2 2.7.3.2] </span></td></tr>
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| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1u6r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1u6r OCA], [http://pdbe.org/1u6r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1u6r RCSB], [http://www.ebi.ac.uk/pdbsum/1u6r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1u6r ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/KCRM_RABIT KCRM_RABIT]] Reversibly catalyzes the transfer of phosphate between ATP and various phosphogens (e.g. creatine phosphate). Creatine kinase isoenzymes play a central role in energy transduction in tissues with large, fluctuating energy demands, such as skeletal muscle, heart, brain and spermatozoa. | + | [https://www.uniprot.org/uniprot/KCRM_RABIT KCRM_RABIT] Reversibly catalyzes the transfer of phosphate between ATP and various phosphogens (e.g. creatine phosphate). Creatine kinase isoenzymes play a central role in energy transduction in tissues with large, fluctuating energy demands, such as skeletal muscle, heart, brain and spermatozoa. |
| | == 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: Creatine kinase]] | |
| - | [[Category: European rabbit]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Borders, C L]] | + | [[Category: Oryctolagus cuniculus]] |
| - | [[Category: Edmiston, P]] | + | [[Category: Borders CL]] |
| - | [[Category: Kundracik, M L]] | + | [[Category: Edmiston P]] |
| - | [[Category: Ohren, J F]] | + | [[Category: Kundracik ML]] |
| - | [[Category: Viola, R E]] | + | [[Category: Ohren JF]] |
| - | [[Category: Transferase]] | + | [[Category: Viola RE]] |
| Structural highlights
Function
KCRM_RABIT Reversibly catalyzes the transfer of phosphate between ATP and various phosphogens (e.g. creatine phosphate). Creatine kinase isoenzymes play a central role in energy transduction in tissues with large, fluctuating energy demands, such as skeletal muscle, heart, brain and spermatozoa.
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 structure of a transition-state analog complex of a highly soluble mutant (R134K) of rabbit muscle creatine kinase (rmCK) has been determined to 1.65 A resolution in order to elucidate the structural changes that are required to support and regulate catalysis. Significant structural asymmetry is seen within the functional homodimer of rmCK, with one monomer found in a closed conformation with the active site occupied by the transition-state analog components creatine, MgADP and nitrate. The other monomer has the two loops that control access to the active site in an open conformation and only MgADP is bound. The N-terminal region of each monomer makes a substantial contribution to the dimer interface; however, the conformation of this region is dramatically different in each subunit. Based on this structural evidence, two mutational modifications of rmCK were conducted in order to better understand the role of the amino-terminus in controlling creatine kinase activity. The deletion of the first 15 residues of rmCK and a single point mutant (P20G) both disrupt subunit cohesion, causing the dissociation of the functional homodimer into monomers with reduced catalytic activity. This study provides support for a structural role for the amino-terminus in subunit association and a mechanistic role in active-site communication and catalytic regulation.
Structural asymmetry and intersubunit communication in muscle creatine kinase.,Ohren JF, Kundracik ML, Borders CL Jr, Edmiston P, Viola RE Acta Crystallogr D Biol Crystallogr. 2007 Mar;63(Pt 3):381-9. Epub 2007, Feb 21. PMID:17327675[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Ohren JF, Kundracik ML, Borders CL Jr, Edmiston P, Viola RE. Structural asymmetry and intersubunit communication in muscle creatine kinase. Acta Crystallogr D Biol Crystallogr. 2007 Mar;63(Pt 3):381-9. Epub 2007, Feb 21. PMID:17327675 doi:http://dx.doi.org/S0907444906056204
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