Conantokin-G – Ion Channels and Transporters

Conantokin-G is a conopeptide that has been isolated from the venom of the cone Conus geographus. Conantokin-G selectively inhibits NR2B containing N-methyl-D-aspartate receptors (NMDAR) with a high specificity. Thus, Conantokin-G inhibits in a concentration-dependent manner the Ca2+ influx leading to a neuroprotective effect against NMDA-induced excitotoxicity. Conantokin-G was shown to block NMDA-evoked currents in murine cortical neurons with an IC50 value of around 480 nM.

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