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Merck

203980

α-Bungarotoxin

from Bungarus multicinctus, No contaminants by IEF, lyophilized solid, irreversible binder to motor end-plate acetylcholine receptor, Calbiochem®

Synonym(s):

α-Bungarotoxin, Bungarus multicinctus

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About This Item

Empirical Formula (Hill Notation):
C338H529N97O105S11
CAS Number:
11032-79-4
Molecular Weight:
7984.12
MDL number:
MFCD00007185
UNSPSC Code:
12352200
NACRES:
NA.77

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Product Name

α-Bungarotoxin, Bungarus multicinctus, Blocks neuromuscular transmission by irreversible binding to motor end-plate acetylcholine receptor (Kd = 1 pM to 1 nM) but does not depress acetylcholine release from motor nerve endings.

description

Merck USA index - 14, 1488

form

lyophilized solid

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze

solubility

PBS: soluble
water: soluble

shipped in

ambient

storage temp.

−20°C

Quality Level

100

Related Categories

Analysis Note

Contaminants: None detectable by IEF

Biochem/physiol Actions

Cell permeable: no
Kd = 1 pM to 1 nM for motor end-plate acetylcholine receptor
Primary Target
Motor end-plate acetylcholine receptor
Product does not compete with ATP.
Reversible: no

Disclaimer

Toxicity: Harmful (C)

General description

A polypeptide composed of 74 amino acids containing 5 disulfide bridges. Blocks neuromuscular transmission by irreversible binding to the motor end-plate acetylcholine receptor (Kd = 1 nM to 1 pM) but does not depress acetylcholine release from motor nerve endings. Blocks nicotine-induced augmentation in intracellular Ca2+ in PC12 cells (IC50 = 310 nM). Prevents opening of nicotinic receptor-associated ion channels. Reconstitution experiments in Xenopus oocytes have shown the effects of α-Bungarotoxin on neuronal nAChR to be highly specific for the α7-subtype (IC50 = 1.6 nM), but not for the α3β4-subtype (IC50 >3 µM).
Blocks neuromuscular transmission by irreversible binding to motor end-plate acetylcholine receptor (Kd = 1 pM to 1 nM) but does not depress acetylcholine release from motor nerve endings. Blocks nicotine-induced increase of intracellular Ca2+ in PC12 cells (IC50 = 310 nM), and prevents opening of nicotinic receptor-associated ion channels. Reconstitution experiments in Xenopus oocytes have shown the effects of α-bungarotoxin on neuronal nAChR to be highly specific for the α7-subtype (IC50 = 1.6 nM), but not for the α3β4-subtype (IC50 >3 µM).

Other Notes

H-Ile-Val-Cys³-His-Thr-Thr-Ala-Thr-Ser-Pro-Ile-Ser-Ala-Val-Thr-Cys¹⁶-Pro-Pro-Gly-Glu-Asn-Leu-Cys²³-Tyr-Arg-Lys-Met-Trp-Cys²⁹-Asp-Ala-Phe-Cys³³-Ser-Ser-Arg-Gly-Lys-Val-Val-Glu-Leu-Gly-Cys⁴⁴-Ala-Ala-Thr-Cys⁴⁸-Pro-Ser-Lys-Lys-Pro-Tyr-Glu-Glu-Val-Thr-Cys⁵⁹-Cys⁶⁰-Ser-Thr-Asp-Lys-Cys⁶⁵-Asn-Pro-His-Pro-Lys-Gln-Arg-Pro-Gly-OH (disulfide bonds: 3 → 23; 16 → 44; 29 → 33; 48 → 59; 60 → 65)
Lopez, M.G., et al. 1998. Proc. Natl. Acad. Sci. USA 95, 14184.
Zhang, Z.W., et al. 1994. Neuron 12, 167.
Bambrick, L.L., and Gordon, T. 1992. J. Physiol.449, 479.
Lin, S.R., and Chang, C.C. 1992. Biochim. Biophys. Acta1159, 255.
Motomura, M., et al. 1992. Neurosci. Lett.143, 139.
Sorenson, E.M., and Chiappinelli, V.A. 1992. J. Comp. Neurol.323, 1.
Ruan, K.H., et al. 1990. Proc. Natl. Acad. Sci. USA87, 6156.

Physical form

Supplied as an acetate salt

Preparation Note

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

Legal Information

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

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificates of Analysis (COA)

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