Beta-mammal toxin Ct1a (Ct1a) (Ct1a)

Centruroides tecomanus Ct1a is a potent beta-mammal toxin isolated from the venom of the Mexican scorpion Centruroides tecomanus. It primarily acts as a modulator of voltage-gated sodium channels, with a high affinity for the Nav1.6 subtype. By binding to site 4 of these channels, Ct1a shifts the voltage-dependence of activation toward more negative potentials, which leads to persistent channel opening and repetitive neuronal firing. This mechanism is responsible for the severe neurotoxic symptoms observed during envenomation, including pain, paresthesia, and potentially fatal systemic effects. In therapeutic research, Ct1a is a target for the development of recombinant antivenoms and single-chain antibody fragments (scFvs) designed to neutralize its toxic effects. Additionally, it serves as a valuable pharmacological tool for studying the role of Nav1.6 channels in neuronal excitability and diseases such as Parkinson's and chronic pain.

Other names

Beta-toxin Clt1Neurotoxin 1Toxin II.20.3.4Ct1

Neutralization of the toxin's activity through high-affinity binding by single-chain variable fragments (scFvs), which prevents the toxin from interacting with site 4 of voltage-gated sodium channels.