Abstract:
:The first example of a new sub-family of toxins (alpha-KTx20.1) from the scorpion Tityus trivittatus was purified, sequenced and characterized physiologically. It has 29 amino acid residues, three disulfide bridges assumed to adopt the cysteine-stabilized alpha/beta scaffold with a pI value of 8.98. The sequence identities with all the other known alpha-KTx are less than 40%. Its effects were verified using seven different cloned K(+) channels (vertebrate Kv1.1-1.5, Shaker IR and hERG) expressed in Xenopus leavis oocytes. The toxin-induced effects show large differences among the different K(+) channels and a preference towards Kv1.3 (EC50=7.9+/-1.4 nM).
journal_name
FEBS Lettjournal_title
FEBS lettersauthors
Abdel-Mottaleb Y,Coronas FV,de Roodt AR,Possani LD,Tytgat Jdoi
10.1016/j.febslet.2005.12.073keywords:
subject
Has Abstractpub_date
2006-01-23 00:00:00pages
592-6issue
2eissn
0014-5793issn
1873-3468pii
S0014-5793(05)01558-9journal_volume
580pub_type
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