1qk1
From Proteopedia
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|PDB= 1qk1 |SIZE=350|CAPTION= <scene name='initialview01'>1qk1</scene>, resolution 2.70Å | |PDB= 1qk1 |SIZE=350|CAPTION= <scene name='initialview01'>1qk1</scene>, resolution 2.70Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=PO4:PHOSPHATE ION'>PO4</scene> | + | |LIGAND= <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene> |
| - | |ACTIVITY= [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] | + | |ACTIVITY= <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> |
|GENE= GENBANK ACCESSION J04469 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | |GENE= GENBANK ACCESSION J04469 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1qk1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qk1 OCA], [http://www.ebi.ac.uk/pdbsum/1qk1 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1qk1 RCSB]</span> | ||
}} | }} | ||
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[[Category: Schlattner, U.]] | [[Category: Schlattner, U.]] | ||
[[Category: Wallimann, T.]] | [[Category: Wallimann, T.]] | ||
| - | [[Category: PO4]] | ||
[[Category: cancer]] | [[Category: cancer]] | ||
[[Category: cellular energy metabolism]] | [[Category: cellular energy metabolism]] | ||
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[[Category: octamer stability]] | [[Category: octamer stability]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 23:14:45 2008'' |
Revision as of 20:14, 30 March 2008
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| , resolution 2.70Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Gene: | GENBANK ACCESSION J04469 (Homo sapiens) | ||||||
| Activity: | Creatine kinase, with EC number 2.7.3.2 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF HUMAN UBIQUITOUS MITOCHONDRIAL CREATINE KINASE
Overview
Creatine kinase (CK), catalyzing the reversible trans-phosphorylation between ATP and creatine, plays a key role in the energy metabolism of cells with high and fluctuating energy requirements. We have solved the X-ray structure of octameric human ubiquitous mitochondrial CK (uMtCK) at 2.7 A resolution, representing the first human CK structure. The structure is very similar to the previously determined structure of sarcomeric mitochondrial CK (sMtCK). The cuboidal octamer has 422 point group symmetry with four dimers arranged along the fourfold axis and a central channel of approximately 20 A diameter, which extends through the whole octamer. Structural differences with respect to sMtCK are found in isoform-specific regions important for octamer formation and membrane binding. Octameric uMtCK is stabilized by numerous additional polar interactions between the N-termini of neighboring dimers, which extend into the central channel and form clamp-like structures, and by a pair of salt bridges in the hydrophobic interaction patch. The five C-terminal residues of uMtCK, carrying positive charges likely to be involved in phospholipid-binding, are poorly defined by electron density, indicating a more flexible region than the corresponding one in sMtCK. The structural differences between uMtCK and sMtCK are consistent with biochemical studies on octamer stability and membrane binding of the two isoforms.
About this Structure
1QK1 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Crystal structure of human ubiquitous mitochondrial creatine kinase., Eder M, Fritz-Wolf K, Kabsch W, Wallimann T, Schlattner U, Proteins. 2000 May 15;39(3):216-25. PMID:10737943
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