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Merck
CN

A7475

Anthopleurin-A trifluoroacetate salt

>88% (HPLC)

Synonym(s):

AP-A trifluoroacetate salt, Anthopleura toxin A trifluoroacetate salt

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About This Item

Empirical Formula (Hill Notation):
C220H326N64O67S6 · xC2HF3O2
Molecular Weight:
5131.72 (free base basis)
UNSPSC Code:
12352202
NACRES:
NA.77
MDL number:
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Product Name

Anthopleurin-A trifluoroacetate salt, >88% (HPLC)

assay

>88% (HPLC)

form

solid

storage temp.

−20°C

Application

Anthopleurin-A is a toxin used to study the gating mechanisms of sodium channels. Anthopleurin-A slows the repolarization phase of nerve and muscle action potentials by inactivating the sodium channel.

Biochem/physiol Actions

Anthopleurin-A slows the repolarization phase of nerve and muscle action potentials by inactivating the sodium channel. Anthopleurin-A shows a preference towards cardiac channels over the neuronal sodium channels. It is a toxin used to study the gating mechanisms of sodium channels.
Shown to have inotropic effects and not chronotropic effects on mammalian heart preparations.

General description

Synthetic peptide toxin that was originally isolated from the sea anemone, Anthopleura xantho­grammica.
Synthetic peptide toxin.

Other Notes

supplied as trifluoroacetate salt

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Regulatory Information

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Dorothy A Hanck et al.
Toxicon : official journal of the International Society on Toxinology, 49(2), 181-193 (2006-11-10)
Site-3 toxins are small polypeptide venoms from scorpions, sea anemones, and spiders that bind with a high specificity to the extracellular surface of voltage-gated Na channels. After binding to a site near the S4 segment in domain IV the toxin
S G Priori et al.
Circulation research, 78(6), 1009-1015 (1996-06-01)
The long-QT syndrome (LQTS) is a hereditary disorder characterized by an abnormally prolonged QT interval and by life-threatening arrhythmias. Recently, two of the genes responsible for LQTS have been identified: SCN5A, a voltage-dependent Na+ channel on chromosome 3 (LQT3), and
G R Benzinger et al.
Pflugers Archiv : European journal of physiology, 434(6), 742-749 (1997-11-05)
Site-3 toxins from scorpion and sea anemone bind to Na channels and selectively inhibit current decay. Anthopleurins A and B (ApA and ApB, respectively), toxins found in the venom of the sea anemone Anthopleura xanthogrammica, bind to closed states of
M F Sheets et al.
The Journal of general physiology, 106(4), 617-640 (1995-10-01)
The gating charge and voltage dependence of the open state to the inactivated state (O-->I) transition was measured for the voltage-dependent mammalian cardiac Na channel. Using the site 3 toxin, Anthopleurin-A (Ap-A), which selectively modifies the O-->I transition (see Hanck
N el-Sherif et al.
Circulation research, 79(3), 474-492 (1996-09-01)
We have previously developed a canine in vivo model of the long QT syndrome (LQTS) using the neurotoxin anthopleurin A (AP-A), which acts by slowing sodium channel inactivation. The recent discovery of a genetic mutation in the cardiac sodium channel

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