475815-M

Microcystin-LR, Microcystis aeruginosa

Cyclic heptapeptide toxin isolated from the freshwater cyanobacteria Microcystis aeruginosa.

• Synonym(e): Microcystin-LR, Microcystis aeruginosa, MCYST-LR
• Empirische Formel (Hill-System): C₄₉H₇₄N₁₀O₁₂
• CAS-Nummer: 101043-37-2
• Molekulargewicht: 995.17
• MDL-Nummer: MFCD01774058
• UNSPSC-Code: 12352200

Eigenschaften

• Qualitätsniveau: 100
• Assay: ≥95% (HPLC)
• Form: lyophilized solid
• Hersteller/Markenname: Calbiochem^®
• Lagerbedingungen: OK to freeze
• Farbe: pale yellow
• Löslichkeit: methanol: 2 mg/mL; DMSO: 2.5 mg/mL
• Lagertemp.: −20°C
• InChI: 1S/C49H74N10O12/c1-26(2)23-37-46(66)58-40(48(69)70)30(6)42(62)55-35(17-14-22-52-49(50)51)45(65)54-34(19-18-27(3)24-28(4)38(71-10)25-33-15-12-11-13-16-33)29(5)41(61)56-36(47(67)68)20-21-39(60)59(9)32(8)44(64)53-31(7)43(63)57-37/h11-13,15-16,18-19,24,26,28-31,34-38,40H,8,14,17,20-23,25H2,1-7,9-10H3,(H,53,64)(H,54,65)(H,55,62)(H,56,61)(H,57,63)(H,58,66)(H,67,68)(H,69,70)(H4,50,51,52)/b19-18+,27-24+/t28-,29-,30-,31+,34-,35-,36+,37-,38-,40+/m0/s1
• InChIKey: ZYZCGGRZINLQBL-GWRQVWKTSA-N

Beschreibung

Allgemeine Beschreibung

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 the effect of contaminating phosphatase activities in protein kinase assays. A 2.5 mM (250 µg/100 µl) solution of Microcystin-LR, Microcystis aeruginosa (Cat. No. 475821) in DMSO is also available.

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). Has no effect on protein kinases, making it useful for reducing contaminating phosphatase activities in protein kinase assays.

Biochem./physiol. Wirkung

Target IC₅₀: 1.7 nM and 40 pM against PP1 and PP2A, respectively

Warnhinweis

Toxicity: Highly Toxic (H)

Angaben zur Herstellung

Further dilute with aqueous buffer just prior to use.

Rekonstituierung

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 6 months at -20°C. Unstable at > pH 7.7.

Sonstige Hinweise

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.

Rechtliche Hinweise

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Sicherheitshinweise

• Piktogramme: GHS06
• Signalwort: Danger
• H-Sätze: H300 + H310,H315,H317,H319,H335
• P-Sätze: P261 - P262 - P280 - P301 + P310 - P302 + P352 + P310 - P305 + P351 + P338
• Gefahreneinstufungen: Acute Tox. 2 Dermal - Acute Tox. 2 Oral - Eye Irrit. 2 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3
• Zielorgane: Respiratory system
• Lagerklassenschlüssel: 6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
• WGK: WGK 3
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable