Title: Margatoxin
CAS Registry Number: 145808-47-5
Additional Names: MgTX
Molecular Formula: C178H286N52O50S7
Molecular Weight: 4178.95
Percent Composition: C 51.16%, H 6.90%, N 17.43%, O 19.14%, S 5.37%
Literature References: Peptide toxin isolated from the new world scorpion, Centruroides margaritatus, consists of 39 amino acids with 3 disulfide bridges. Selectively inhibits voltage-gated potassium channels. Isoln and characterization: M. Garcia-Calvo et al., J. Biol. Chem. 268, 18866 (1993). Synthesis: M. A. Bednarek et al., Biochem. Biophys. Res. Commun. 198, 619 (1994). NMR determn of three dimensional structure: B. A. Johnson et al., Biochemistry 33, 15061 (1994). Use as an affinity label for potassium channels: H.-G. Knaus et al., ibid. 34, 13627 (1995); H. S. Fischer, A. Saria, Neurosci. Lett. 263, 208 (1999).
Use: Biochemical probe.

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