Chi-conotoxin PnID

UniProtKB accession:  Q9BPE9

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UniProtKB description:  Chi-conotoxins inhibit the neuronal noradrenaline transporter (NET/SLC6A2). Of the 3 native isomers, only the isomer with a ribbon disulfide configuration shows pharmacological activity and 3D structure similar to other chi-conotoxins. This ribbon isomer (disulfide pattern: C1-C4 and C2-C3) inhibits the rat norepinephrine transporter (IC(50)=10 uM). In contrast, the globular isomer of PnID shows more than ten times less activity against this transporter and the beaded isomer does not display any measurable biological activity.