ω-Conotoxin Bu8

ω-Conotoxin Bu8 is a ω-conotoxin, which consists of 25 amino acid residues and three disulfide bridges. ω-Conotoxin Bu8 selectively and potently inhibits depolarization-activated Ba2+ currents mediated by rat CaV2.2 expressed in HEK293T cells (IC50= 89 nM)[1].

O=C([C@@H](N)CSSC[C@H](NC1=O)C(N[C@H](C(NCC(N[C@H]2CO)=O)=O)[C@@H](C)O)=O)N[C@H](C(N[C@H](C(N[C@H](C(NCC(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H]1CSSC[C@H](NC3=O)C(N)=O)=O)CC(O)=O)=O)CC4=CC=C(O)C=C4)=O)CO)=O)[C@@H](C)O)=O)CCCNC(N)=N)=O)CCCNC(N)=N)=O)CSSC[C@H](NC2=O)C(N[C@H](C(N[C@H](C(NCC(N[C@H]3CCCCN)=O)=O)CC(N)=O)=O)CCCNC(N)=N)=O)=O)CO)=O)CO)=O)=O)CCCCN)=O)CCCNC(N)=N)=O)CCCCN

[1]Jinqin Chen, et al. A novel ω-conotoxin Bu8 inhibiting N-type voltage-gated calcium channels displays potent analgesic activity. Acta Pharm Sin B. 2021 Sep;11(9):2685-2693.