title: [Expression and characterization of two kinds of recombinant snake neurotoxins].
abstract: The cDNA encoding the precursor of cobrotoxin was cloned from the venom gland of the Chinese continental cobra (Naja naja atra) by RT-PCR. Its deduced amino acid sequence analysis showed that the mature protein was identical to that identified from the Taiwan cobra (Naja naja atra) by protein sequencing technique. The cDNA encoding the mature protein was then subcloned into the expression vector pMAL-P2. The gene of CM11, which was formed by ligation of the fragments of the synthetic oligonucleotides, was also cloned into the expression vector pMAL-P2. After induction of IPTG, both of the neurotoxins were overexpressed as soluble fusion proteins which were confirmed by SDS-PAGE and western blotting. The expressed fusion proteins was purified by sepharose 6B-amylose affinity chromatography and DEAE-sepharose FF chromatography. Both of the recombinant proteins achieved after digestion by factor Xa showed the in vivo toxicity.
authors.affiliation: Shanghai Research Center of Biotechnology, Chinese Academy of Sciences.
authors.forename: Y C
authors.initials: YC
authors.lastname: Qian
authors.forename: Y
authors.initials: Y
authors.lastname: Shen
authors.forename: C Y
authors.initials: CY
authors.lastname: Fan
authors.forename: T S
authors.initials: TS
authors.lastname: Hu
authors.forename: S L
authors.initials: SL
authors.lastname: Yang
authors.forename: Y
authors.initials: Y
authors.lastname: Gong
mesh_terms: D000818:Animals; D001483:Base Sequence; D004546:Elapid Venoms / Q000096:biosynthesis* / Q000235:genetics; D005260:Female; D008297:Male; D051379:Mice; D008969:Molecular Sequence Data; D009498:Neurotoxins / Q000096:biosynthesis* / Q000235:genetics; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis*; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D004546:Elapid Venoms; D009498:Neurotoxins; D011993:Recombinant Fusion Proteins