omega-Agatoxin IVA

Artikelnummer:

5250043

CAS No.:

145017-83-0

Chemische Beschreibung:

Lys-Lys-Lys-Cys4-Ile-Ala-Lys-Asp-Tyr-Gly-Arg-Cys12-Lys-Trp-Gly-Gly-Thr-Pro-Cys19-Cys20-Arg-Gly-Arg-Gly-Cys25-Ile-Cys27-Ser-Ile-Met-Gly-Thr-Asn-Cys34-Glu-Cys36-Lys-Pro-Arg-Leu-Ile-Met-Glu-Gly-Leu-Gly-Leu-Ala-OH

Molekulargewicht:

5198,44 g/mol

OMEGA-agatoxin IVA is a peptide originally isolated from funnel web-spider venom Agelenopsis aperta. This peptide is a specific blocker of P/Q-type calcium channel (Cav2.1). It has been reported that OMEGA-agatoxin IVA is a potent blocker of voltage-gated calcium channels in insect and vertebrate central neurons. The binding site for OMEGA-agatoxin IVA has been localized in part to the extracellular S3-S4 loop in repeat IV of the α-1A Ca2+ channels, which is proximal to the S4 sensor domain. This is coherent with its functional effect (no pore-blocking activity, but gating modifier by a shift of channel activation towards more depolarized potentials). This makes this toxin a voltage-dependent blocker of P/Q calcium channels.

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omega-Agatoxin IVA

Synthetische Toxine

Toxine kommen bekanntlich in einer ganzen Reihe von Tierarten vor. Stellvertretend für die Vielzahl an Toxinen sei Apamin, das Bienengift oder Conotoxin, ein Meeresschneckengift erwähnt. Einige der Meeresschnecken-Gifte (cone snail) enthalten ...

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