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| Product Name | Recombinant Heteroscodra maculata Delta-theraphotoxin-Hm1a |
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| Description | Purity > 85% as determined by SDS-PAGE. MW: 21.5kDa. Full Length: 1-35aa. N-terminal 6xHis-SUMO-tagged and C-terminal Myc-tagged. Heteroscodra maculata (Togo starburst tarantula) (Togo starburst baboon spider). Gating modifier toxin that principally inhibits inactivation of the mammalian voltage-gated sodium channel Nav1.1/SCN1A. When tested against human Nav1.1/SCN1A-Nav1.8/SCN10A alpha subunits heterologously expressed in Xenopus oocytes, the toxin inhibits inactivation of Nav1.1 (EC (50)=38 nM), with substantially weaker effects on Nav1.2/SCN2A (EC (50)=236 nM) and Nav1.3/SCN3A (EC (50)=220 nM). The toxin inhibits several subtypes of voltage-gated potassium channels with significantly lower potency than its effects on Nav1.1/SCN1A. It is a moderately potent blocker of Kv2.1/KCNB1, Kv2.2/KCNB2, Kv4.1/KCND1, Kv4.2/KCND2 and Kv4.3/KCND3 and has little effect on Kv1.1/KCNA1, Kv1.2/KCNA2, Kv1.3/KCNA3, Kv1.4/KCNA4, Kv1.5/KCNA5, Kv1.6/KCNA6 and Kv3.4/KCNC4. The binding affinity and subtype selectivity of the toxin is determined by residues within both the S1-S2 and S3-S4 loops of the domain IV voltage sensor. Intracerebroventricular injection into mice elicits convulsions, spasms, tremors and rapid death. When injected into mouse hindpaw, the toxin elicits an immediate and robust response to pain. Intraplantar injection of toxin does not cause neurogenic inflammation or alter sensitivity to heat, indicative of a modality-specific effect on mechanosensitive neurons |
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| Size | 100ug |
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| Concentration | n/a |
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| Applications | RUO |
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| Other Names | Heteroscodratoxin-1 |
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| Gene, Accession, CAS # | UniProt: P60992 |
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| Catalog # | RPC22649 |
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| Order / More Info | Recombinant Heteroscodra maculata Delta-theraphotoxin-Hm1a from BIOMATIK |
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| Product Specific References | n/a |
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