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• W2050181570 abstract "The Colombian scorpion Tityus pachyurus is toxic to humans and is capable of producing fatal accidents, but nothing is known about its venom components. This communication reports the separation of at least 57 fractions from the venom by high performance liquid chromatography. From these, at least 104 distinct molecular weight compounds were identified by mass spectrometry analysis. The complete amino acid sequences of three peptides were determined and the partial sequences of three others were also identified. Electrophysiological experiments conducted with ion-channels expressed heterologously on Sf9 cells showed the presence of a potent Shaker B K+-channel blocker. This peptide (trivial name Tpa1) contains 23 amino acid residues closely packed by three disulfide bridges with a molecular mass of 2457 atomic mass units. It is the third member of the sub-family 13, for which the systematic name is proposed to be α-KTx13.3. The mice assay showed clearly the presence of toxic peptides to mammals. One of them named Tpa2, containing 65 amino acid residues with molecular mass of 7522.5 atomic mass units, is stabilized by four disulfide bridges. It was shown to modify the Na+-currents of F-11 and TE671 cells in culture, similar to the beta scorpion toxins. These results demonstrate the presence of toxic peptides in the venom of T. pachyurus and confirm that accidents with this species of scorpion should be considered an important human hazard in Colombia." @default.
• W2050181570 created "2016-06-24" @default.
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• W2050181570 date "2006-01-01" @default.
• W2050181570 modified "2023-10-15" @default.
• W2050181570 title "Proteomic analysis of the venom and characterization of toxins specific for Na+- and K+-channels from the Colombian scorpion Tityus pachyurus" @default.
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• W2050181570 doi "https://doi.org/10.1016/j.bbapap.2005.08.010" @default.
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