title: [Optimizing expression and purification of recombinant Salvia miltiorrhiza copalyl diphosphate synthase protein in E. coli and preparation of rabbit antiserum against SmCPS].
abstract: The expression plasmid pET32CPS harboring SmCPS gene was transformed into E. coli BL21 trxB (DE3) resulting in recombinant strain E. coli [pET32CPS]. The induction of E. coli [pET32CPS] in different temperatures, induction time, IPTG concentrations and A600 values of E. coli were performed. The optimal expression conditions of SmCPS were characterized according to the orthogonal analysis, and the ratio of the interest protein to total proteins reached to 35.6%. The recombinant SmCPS protein purified by Ni2+ affinity chromatography column was identified by SDS-PAGE and Western blotting, and then used for rabbit immunization. The titer of the rabbit antiserum against SmCPS was about 1:24 300 after the third immunization, and could specifically recognize the antigen of SmCPS protein by Western blotting analysis. The successful preparation of polyclonal antibody against SmCPS laid a foundation for further correlative study between expression of SmCPS and the production of tanshinones in protein level.
authors.affiliation: Institute of Chinese Materia Medica, Chinese Academy of Chinese Medical Science, Beijing 100700, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Gao
authors.forename: Guang-hong
authors.initials: GH
authors.lastname: Cui
authors.forename: Jian-qiang
authors.initials: JQ
authors.lastname: Kong
authors.forename: Ke-di
authors.initials: KD
authors.lastname: Cheng
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Yuan
authors.initials: Y
authors.lastname: Yuan
authors.forename: Lu-qi
authors.initials: LQ
authors.lastname: Huang
mesh_terms: D019883:Alkyl and Aryl Transferases / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D000818:Animals; D000917:Antibody Formation; D004926:Escherichia coli / Q000378:metabolism*; D015870:Gene Expression; D007106:Immune Sera / Q000096:biosynthesis* / Q000276:immunology; D007544:Isopropyl Thiogalactoside / Q000737:chemistry; D008297:Male; D010940:Plant Proteins / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D010957:Plasmids; D011817:Rabbits; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D027561:Salvia miltiorrhiza / Q000737:chemistry; D013696:Temperature; D013997:Time Factors; D014170:Transformation, Genetic
chemical_list: D007106:Immune Sera; D010940:Plant Proteins; D011994:Recombinant Proteins; D007544:Isopropyl Thiogalactoside; D019883:Alkyl and Aryl Transferases; C090963:ent-kaurene synthetase A