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• W2895519346 abstract "As an ω-conopeptide originally discovered from Conus striatus, SO-3 contains 25 amino acid residues and three disulfide bridges. Our previous study has shown that this peptide possesses potent analgesic activity in rodent pain models (mouse and rat), and it specifically inhibits an N-type calcium ion channel (Cav2.2). In the study presented here, we investigated the key amino acid residues for their inhibitory activity against Cav2.2 expressed in HEK 293 cells and analgesic activity in mice. To improve the inhibitory activity of SO-3, we also evaluated the effects of some amino acid residues derived from the corresponding residues of ω-peptide MVIIA, CVID, or GVIA. Our data reveal that Lys6, Ile11, and Asn14 are the important functional amino acid residues for SO-3. The replacement of some amino acid residues of SO-3 in loop 1 with the corresponding residues of CVID and GVIA improved the inhibitory activity of SO-3. The binding mode of Cav2.2 with SO-3 amino acids in loop 1 and loop 2 may be somewhat different from that of MVIIA. This study expanded our knowledge of the structure-activity relationship of ω-peptides and provided a new strategy for improving the potency of Cav2.2 inhibitors." @default.
• W2895519346 created "2018-10-12" @default.
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• W2895519346 date "2018-10-03" @default.
• W2895519346 modified "2023-10-17" @default.
• W2895519346 title "Structure–Activity Analysis of N-Type Calcium Channel Inhibitor SO-3" @default.
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• W2895519346 doi "https://doi.org/10.1021/acs.biochem.8b00803" @default.
• W2895519346 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30281282" @default.
• W2895519346 hasPublicationYear "2018" @default.
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