Abstract: The present invention pertains to fields of biochemistry and molecular biology, relates to an ?O-superfamily conotoxin peptide, pharmaceutical composition thereof, preparation method and use thereof. The present invention further relates to a propeptide of the conotoxin peptide, nucleic acid construct thereof, expression vector and transformed cell thereof, and fusion protein thereof. The present invention further relates to a method for blocking acetylcholine receptors as well as a use of the conotoxin peptide in the manufacture of a medicament. The new ?O-superfamily conotoxin peptide of the present invention is capable of specifically blocking acetylcholine receptor (nAChRs) (e.g., ?9?10 nAChR), and NMDA receptor (e.g.

Abstract: The present invention provides a novel ?-conotoxin peptide, pharmaceutical composition and use thereof. The present invention further provides a propeptide of the conotoxin peptide, a nucleic acid construct, expression vector and transformed cell of the conotoxin peptide as well as a fused protein of the conotoxin peptide. The present invention discloses a method for blocking acetylcholine receptors as well as a use of the conotoxin peptide in the manufacture of a medicament. The ?-conotoxin peptide of the present invention can specifically block acetylcholine receptor (nAChRs, such as ?3?2 nAChRs, ?6/?3?2?3 nAChR or ?3?4 nAChR or ?6/?3?4 nAChR), has activity for treatment of neuralgia, addiction, Parkinson's disease, dementia, schizophrenia, cancers, and can be used in the manufacture of a medicament for analgesia and smoking cessation and drug-withdrawal, a medicament for treatment of mental diseases and cancers, as well as a tool drug for neurosciences.

Abstract: The present invention provides a novel ?-conotoxin peptide, pharmaceutical composition and use thereof. The present invention further provides a propeptide of the conotoxin peptide, a nucleic acid construct, expression vector and transformed cell of the conotoxin peptide as well as a fused protein of the conotoxin peptide. The present invention discloses a method for blocking acetylcholine receptors as well as a use of the conotoxin peptide in the manufacture of a medicament. The ?-conotoxin peptide of the present invention can specifically block acetylcholine receptor (nAChRs, such as ?3?2 nAChRs, ?6/?3?2?3 nAChR or ?3?4 nAChR or ?6/?3?4 nAChR), has activity for treatment of neuralgia, addiction, Parkinson's disease, dementia, schizophrenia, cancers, and can be used in the manufacture of a medicament for analgesia and smoking cessation and drug-withdrawal, a medicament for treatment of mental diseases and cancers, as well as a tool drug for neurosciences.