475821
Microcystin-LR
from Microcystis aeruginosa, ≥95% (HPLC), liquid, protein phosphatase 2A and protein phosphatase 1 inhibitor, Calbiochem®
Synonym(s):
InSolution Microcystin-LR, Microcystis aeruginosa
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About This Item
Empirical Formula (Hill Notation):
C49H74N10O12
Molecular Weight:
995.17
UNSPSC Code:
12352200
NACRES:
NA.77
Product Name
Microcystin-LR, Microcystis aeruginosa, InSolution, ≥95%, inhibitor of protein phosphatase 1 (PP1) and protein phosphatase 2A (PP2A)
assay
≥95% (HPLC)
form
liquid
manufacturer/tradename
Calbiochem®
storage condition
OK to freeze
desiccated (hygroscopic)
protect from light
shipped in
wet ice
storage temp.
−20°C
Quality Level
Related Categories
Other Notes
Craig, M., et al. 1996. Biochem. Cell Biol. 74, 569.
Nishiwaki, R., et al. 1994. Cancer Lett. 83, 283.
Amick, G.D., et al. 1992. Biochem. J.287, 1019.
Davidson, H.W., et al. 1992. J. Cell Biol.116, 1343.
Nishiwaki-Matsushima, R., et al. 1992. J. Cancer Res. Clin. Oncol. 118, 420.
Cohen, P., et al. 1990. Trends Biochem. Sci.15, 98.
MacKintosh, C., et al. 1990. FEBS Lett.264, 187.
Cohen, P., et al. 1989. FEBS Lett.250, 596.
Carmichael, W.W. 1988. in Handbook of Natural Toxins3,Marine Toxins and Venoms (Tu, A.T., Ed.) p. 121, Decker, New York.
Nishiwaki, R., et al. 1994. Cancer Lett. 83, 283.
Amick, G.D., et al. 1992. Biochem. J.287, 1019.
Davidson, H.W., et al. 1992. J. Cell Biol.116, 1343.
Nishiwaki-Matsushima, R., et al. 1992. J. Cancer Res. Clin. Oncol. 118, 420.
Cohen, P., et al. 1990. Trends Biochem. Sci.15, 98.
MacKintosh, C., et al. 1990. FEBS Lett.264, 187.
Cohen, P., et al. 1989. FEBS Lett.250, 596.
Carmichael, W.W. 1988. in Handbook of Natural Toxins3,Marine Toxins and Venoms (Tu, A.T., Ed.) p. 121, Decker, New York.
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Biochem/physiol Actions
Cell permeable: no
Primary Target
protein phosphatase 1 (PP1) and protein phosphatase 2A (PP2A)
protein phosphatase 1 (PP1) and protein phosphatase 2A (PP2A)
Product does not compete with ATP.
Reversible: no
Target IC50: 1.7 nM, 40 pM, against protein phosphatase 1 (PP1), protein phosphatase 2A (PP2A), respectively
Disclaimer
Toxicity: Highly Toxic (H)
General description
Cyclic heptapeptide toxin isolated from the freshwater cyanobacteria, Microcystis aeruginosa. Potent inhibitor of protein phosphatase 1 (PP1) and protein phosphatase 2A (PP2A). Unlike Okadaic Acid (Cat. No. 495604), microcystin-LR is effective on both PP1 (IC50 = 1.7 nM) and PP2A (IC50 = 40 pM). Reacts with phosphatase in a two-step mechanism involving rapid binding and inactivation of the catalytic subunit followed by slower covalent interactions. Has no effect on protein kinases, making it useful for reducing contaminating phosphatase activities in protein kinase assays.
Legal Information
Not available for sale outside of the United States.
CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
Packaging
Packaged under inert gas
yes
Physical form
A 2.5 mM (250 µg/100 µl) solution of Microcystin-LR, Microcystis aeruginosa (Cat. No. 475815) in DMSO.
Preparation Note
Following initial thaw, aliquot and freeze (-20°C).
Storage Class
10 - Combustible liquids
wgk
WGK 2
flash_point_f
188.6 °F - closed cup - (Dimethylsulfoxide)
flash_point_c
87 °C - closed cup - (Dimethylsulfoxide)
Regulatory Information
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