イベリオトキシン 化学特性,用途語,生産方法
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Iberiotoxin is a selective and reversible inhibitor of high-conductance calcium-activated potassium channel. A toxin purified from the Eastern Indian red scorpion Buthus tamulus.
Biochem/physiol Actions
The single chain peptide iberiotoxin (IbTX) is a selective and reversible inhibitor of high-conductance calcium-activated potassium channels (PK,Ca). It occurs naturally in the venom of the scorpion Buthus tamulus. IbTX also modulates the binding of charybdotoxin (CbTX) to smooth muscle sarcolemmal membranes in a non-competitive manner. IbTX is similar in size to CbTX and shares considerable sequence homology with CbTX. However, IbTX differs in its overall charge in having one fewer basic and four more acidic residues than CbTX.
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