| Bioactivity | Guangxitoxin 1E is a potent and selective blocker of KV2.1 and KV2.2 channels. Guangxitoxin 1E inhibits KV2 with an IC50 of 1-3 nM. KV2 channels underlie delayed-rectifier potassium currents in various neurons[1][2]. | ||||||
| Invitro | Guangxitoxin 1E inhibits KV2 with an IC50 of 1-3 nM but has no significant effect on KV1.2, KV1.3, KV1.5, KV3.2 and BK potassium channels, nor on calcium and sodium channels CaV1.2, CaV2.2, NaV1.5, NaV1.7, NaV1.8, whereas the IC50 for KV4.3 channels is 24-54 nM[2].In mouse β-cells, Guangxitoxin 1E inhibits 90% of IDR and, as for KV2.1, shifts the voltage dependence of channel activation to more depolarized potentials, a characteristic of gating-modifier peptides. Guangxitoxin 1E broadens theβ-cell action potential, enhances glucose-stimulated intracellular calcium oscillations, and enhances insulin secretion from mouse pancreatic islets in a glucose-dependent manner[2]. | ||||||
| Name | Guangxitoxin 1E | ||||||
| CAS | 1233152-82-3 | ||||||
| Shortening | EGECGGFWWKCGSGKPACCPKYVCSPKWGLCNFPMP(Disulfide bridge:Cys4-Cys19;Cys11-Cys24;Cys18-Cys31) | ||||||
| Formula | C178H248N44O45S7 | ||||||
| Molar Mass | 3948.61 | ||||||
| Transport | Room temperature in continental US; may vary elsewhere. | ||||||
| Storage | Sealed storage, away from moisture
*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture) |
Guangxitoxin 1E
CAS: 1233152-82-3 F: C178H248N44O45S7 W: 3948.61
Guangxitoxin 1E is a potent and selective blocker of KV2.1 and KV2.2 channels. Guangxitoxin 1E inhibits KV2 with an IC50
Data collection：peptidedb@qq.com
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