Mambalgin-1 - P0DKR6 (3SX1_DENPO)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P0DKR6: 4
This three-finger toxin inhibits ASIC channels. It acts as a gating modifier toxin by decreasing the apparent proton sensitivity of activation and by slightly increasing the apparent proton sensitivity for inactivation (PubMed:23034652). It binds more tightly to the closed state and to a much lesser extent the inactivated/desensitized state of ASIC1a isoform of ASIC1 (PubMed:23034652). It binds mainly in a region of rat ASIC1a involving the upper part of the thumb domain (residues 'Asp-349' and 'Phe-350'), the palm domain of an adjacent subunit, and the beta-ball domain (residues 'Arg-190', 'Asp- 259', and 'Gln-260') (By similarity). The peptide exerts both stimulatory and inhibitory effects on ASIC1a (By similarity). It reversibly inhibits rat ASIC1a (IC(50)=3.4-55 nM), rat ASIC1a-ASIC2b (61 nM), rat ASIC1a-ASIC1b (72 nM), human ASIC1a (127-580 nM), rat ASIC1b (22.2-203 nM), rat ASIC1a-ASIC2a (152-252 nM) (PubMed:23034652, PubMed:23624383, PubMed:25873388, PubMed:24619065, PubMed:26680001). In vivo, it shows a potent naloxone-resistant analgesic effect against acute and inflammatory pain upon central and peripheral injection (PubMed:23034652). In addition, it also has an opioid-independent effect on both thermal and mechanical inflammatory pain after systemic administration and is effective against neuropathic pain (PubMed:26680001). UniProt
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The positively charged finger II is deeply inserted into the acidic cavity at the interface of two ASIC1a subunits. UniProt
  • Organism: Black mamba
  • Length:
  • UniProt
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