142948-19-4

142948-19-4 structure

Name: Scyllatoxin
Chemical Name: leiurotoxin i
CAS Number: 142948-19-4
Molecular Formula: C₁₄₂H₂₄₃N₄₅O₃₉S₇
Molecular Weight: 3429.18000
Catalog: Signaling Pathways Membrane Transporter/Ion Channel Potassium Channel
Create Date: 2018-12-21 00:40:15
Modify Date: 2024-01-11 18:08:26
Scyllatoxin (Leiurotoxin I) is a peptide toxin, it can be isolated from the venom of the scorpion (Leiurus quinquestriatus hebraeus). Scyllatoxin is a blocker of small-conductance KCa (SK) channel. Scyllatoxin enhances both norepinephrine (NE) and epinephrine (Epi) release in vivo[1].

Name	leiurotoxin i
Synonyms	Scyllatoxin,LeTx I Leiurotoxin I Scyllatoxin,LeTx I ALA-PHE-CYS-ASN-LEU-ARG-MET-CYS-GLN-LEU-SER-CYS-ARG-SER-LEU-GLY-LEU-LEU-GLY-LYS-CYS-ILE-GLY-ASP-LYS-CYS-GLU-CYS-VAL-LYS-HIS-NH2 LETX I SCORPION TOXIN LETX I H-Ala-Phe-Cys-Asn-Leu-Arg-Met-Cys-Gln-Leu-Ser-Cys-Arg-Ser-Leu-Gly-Leu-Leu-Gly-Lys-Cys-Ile-Gly-Asp-Lys-Cys-Glu-Cys-Val-Lys-His-NH2 SCYLLATOXIN

Description	Scyllatoxin (Leiurotoxin I) is a peptide toxin, it can be isolated from the venom of the scorpion (Leiurus quinquestriatus hebraeus). Scyllatoxin is a blocker of small-conductance KCa (SK) channel. Scyllatoxin enhances both norepinephrine (NE) and epinephrine (Epi) release in vivo[1].
Related Catalog	Research Areas >> Neurological Disease Signaling Pathways >> Membrane Transporter/Ion Channel >> Potassium Channel
In Vitro	For scyllatoxin, the Arg6 and Arg13 are essential for binding to the Ca2+-activated K+ channel protein and for the functional effect of the toxin[1]. For scyllatoxin, His31 is important for the binding activity of the toxin and for the induction of contractions on taenia coli[1].
In Vivo	Scyllatoxin (2 μM) increases basal Epi release, the nerve stimulation-induced Epi release and the exogenous acetylcholine (Ach)-induced catecholamine release by microdialysis technique to the left adrenal medulla of anesthetized adult male Wistar rats[2].
References	[1]. Auguste P, et al. Scyllatoxin, a blocker of Ca(2+)-activated K+ channels: structure-function relationships and brain localization of the binding sites. Biochemistry. 1992 Jan 28;31(3):648-54. [2]. Akiyama T, et al. Role of Ca2+-activated K+ channels in catecholamine release from in vivo rat adrenal medulla. Neurochem Int. 2010 Jan;56(2):263-9.