Kappa-actitoxin-Ael2a - P61541 (BDS1_ANTEL)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P61541: 1
This toxin acts both on ERG potassium channels and sodium channels (PubMed:12815161,PubMed:16497878, PubMed:17473056, PubMed:22972919). It potently and reversibly inhibits human Kv11.1/KCNH2/ERG1 (IC(50)=34 nM) (PubMed:12815161, PubMed:16497878, PubMed:17473056), rat Kv11.1/KCNH2/ERG1 (PubMed:16497878) and Kv11.3/KCNH7/ERG3 (PubMed:17473056) voltage-gated potassium channels in a similar potency. It acts as a gating-modifier toxin that shifts the voltage-dependence of ERG activation in the positive direction and suppresses its current amplitudes elicited by strong depolarizing pulses (PubMed:12815161, PubMed:17473056). On sodium channels, it blocks Nav1.2/SCN2A (EC(50)=31 nM), Nav1.3/SCN3A, Nav1.4/SCN4A, Nav1.5/SCN5A, Nav1.6/SCN8A, Nav1.8/SCN10A (EC(50)=92 nM) (PubMed:22972919). It may act by binding at site 1 or close by, only when the pore is in an open configuration (PubMed:22972919). In vivo, this toxin does not induce neurotoxic symptoms when injected into mice (PubMed:12815161). UniProt
Pathway Maps
      ESCHER  BiGG
Has the CSbeta/beta fold, which comprises anti-parallel beta-sheets stabilized by three or four disulfide bonds. UniProt
  • Organism: Sea anemone
  • Length:
  • UniProt
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