creatine kinase cystosolic (70% of enzymatic activity) 1.) muscle type (ck-mm) -homodimer 2.) brain...
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Creatine Kinase
Cystosolic (70% of enzymatic activity)
1.) Muscle type (CK-MM)
-homodimer
2.) Brain type (CK-BB)
-homodimer
3.) Hybrid type (CK-MB)
-heterodimer
-typically found in the heart
5 Isoforms Know in the Body
Mitochondrial (30% of enzymatic
activity)
4.) Sarcomeric type (smtCK)
-octamer
5.) Ubiquitous type (umtCK)
-octamer
Blum, H. E., Deus, B., and Gerok, W. (1983) Mitochondrial creatine kinase from human heart: purification and characterization of crystallized isoenzyme. J. Biol. Chem. 94, 1247-1257.
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Pathway
Tokasarska-Schlattner, M., Williann, T. (2006) Mitochondrial creatine kinase in human health and disease. Mol Bas. Dise. Vol 176, Iss 2, 164-180.
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Amino Acid Sequence Alignment
-Methionine 273-Cysteine 284
-Tryptophan 211, 218, and 228 Lyzlova, S. N., Stefanov, V. E. (1990) Phosphagen Kinases. CRC Press, 63-73 pgs.
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-Methionine 273-Cysteine 284
Amino Acid Sequence Alignment
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Amino Acid Sequence Alignment
-Tryptophan 211, 218, and 228
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Structure -13-18 alpha helicies depending on specific structure
-32-38% alpha helix residues-16-19 beta sheets
-15-16%
-Human CK-BB -Contains
-19 alpha helices (38%)
-18 beta sheets (16%)
PDB id = 3DRB
Bong, S. M., Chi, Y. M., Hwang, K. Y., Lee, K. S., Moon, J. H., and Nam, K. H. (2008) Structural studies of human brain-type creatine kinase complexed with ADP-Mg2+-NO3—
creatine trasition-state analogue complex. FEBS Lett. 582, 28, 3959-3965.
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Transition Complex
-Green loop interactions close off active site
-Arg 130,132,236,292,320 create a positive pocket for phosphate of ATP/ADP to bind
-Creatine’s carboxylate forms a H-bond with main chain N from Val72
-Cys283 anchors creatine for nucleophilic attach of a phosphorus from ATP
Bong, S. M., Chi, Y. M., Hwang, K. Y., Lee, K. S., Moon, J. H., and Nam, K. H. (2008) Structural studies of human brain-type creatine kinase complexed with ADP-Mg2+-NO3—creatine trasition-state analogue complex. FEBS Lett. 582, 28, 3959-3965.
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Creatine Kinase Test
-Typical cardiac marker
- During myocardia infarction cell
contents is expelled
-Can be an indicator of several
other health issues
-Depends on what isoform is
elevated in the blood
-Stroke, pulmonary infection, muscular
dystrophies, myopathy, and others "Creatine Kinase, Serum." Mayo Clinic Mayo Medical Laboratories. January 1, 1999. Accessed October 19, 2014. http://www.mayomedicallaboratories.com/test-catalog/Clinical and Interpretive/8336.
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Creatine Supplementation
-Can be utilized for short burst of energy for athletes
-Strength and Endurance
-Parkinson’s (slow symptoms)
-Precautions???
"Creatine." Medline Plus. September 8, 2014. Accessed October 19, 2014. http://www.nlm.nih.gov/medlineplus/druginfo/natural/873.html.
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Delivery Methods-Creatine Monohydrate
-Bound to one water molecule
-Micronized Creatine-increased ingestion of creatine monohydrate
-Creatine Ethy Ester-Ester aids in passing through the membrane
-Creatine Malate-Contins 2-3 creatines attached to malic acid. Encourages energy
transport
-Creatine Hydrochoride-More soluble
-Creatine Phosphate (phospocreatine)-not proven to have positive effects