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
Assay:
≥95% (HPLC)
Form:
liquid
Storage condition:
OK to freeze, desiccated (hygroscopic), protect from light
Product Name
Microcystin-LR, Microcystis aeruginosa, InSolution, ≥95%, inhibitor of protein phosphatase 1 (PP1) and protein phosphatase 2A (PP2A)
Quality Segment
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
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.
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
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).
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.
Due to the nature of the Hazardous Materials in this shipment, additional shipping charges may be applied to your order. Certain sizes may be exempt from the additional hazardous materials shipping charges. Please contact your local sales office for more information regarding these charges.
Legal Information
Not available for sale outside of the United States.
CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
Disclaimer
Toxicity: Highly Toxic (H)
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)
Certificates of Analysis (COA)
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