Potassium channel toxin alpha-KTx 3.1

UniProtKB accession:  P24662

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UniProtKB description:  Potent inhibitor voltage-gated potassium channels Kv1.3/KCNA3 (Kd=0.65 nM) and Kv1.1/KCNA1 (Kd=41 nM) (PubMed:7517498). It appears to block channel activity by a simple bimolecular inhibition process. Induces a transient period of fast flickering in the channel openings, followed by an almost complete blockade of the channel. Its binding affinity to rat brain synaptosomes is 5-fold higher than this of KTX-3. Binding of the toxin to the channel is associated with significant structural rearrangements in both molecules. It also shows a weak interaction with nicotinic acetylcholine receptors (nAChR), suggesting it may weakly inhibit it (PubMed:31276191).