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• W1969394759 abstract "JZTX-XI is a peptide toxin isolated from the venom of the Chinese spider Chilobrachys jingzhao. It contains 34 residues including six cysteine residues with disulfide bridges linked in the pattern of I-IV, II-V, and III-VI. Using 3'- and 5'-RACE methods, the full-length cDNA was identified as encoding an 86-residue precursor of JZTX-XI. In the electrophysiological assay, JZTX-XI shows activity toward the Kv2.1 channel in a way similar to hanatoxin1 and SGTx1 that both the activation and the deactivation processes are affected, which is in accordance with the high sequence homology among them (over 60% identity). On the other hand, JZTX-XI also exhibits specific interaction against the Nav channels of rat cardiac myocytes with a significant reduction in the peak current and slowing of channel inactivation. The solution structure of native JZTX-XI was determined by 1H NMR methods to identify the structural basis of these specific activities. Structural comparison of JZTX-XI with other gating modifier toxins shows that they all adopt a similar surface profile, a hydrophobic patch surrounded by charged residues such as Arg or Lys, which might be a common structural factor responsible for toxin-channel interaction. JZTX-XI might be an ideal tool to further investigate how spider toxins recognize various ion channels as their targets." @default.
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• W1969394759 date "2006-12-01" @default.
• W1969394759 modified "2023-09-22" @default.
• W1969394759 title "Solution Structure and Functional Characterization of Jingzhaotoxin-XI: A Novel Gating Modifier of both Potassium and Sodium Channels^," @default.
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• W1969394759 doi "https://doi.org/10.1021/bi061457+" @default.
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