鼠伤寒沙门菌CVD908 基因组整合表达T7 RNA聚合酶，厌氧启动子nirB promoter启动

质粒/菌株

质粒改造
质粒抗性改造组成型/诱导型荧光质粒质粒复制起点更换质粒启动子替换合成生物学质粒构建
现货质粒菌株
大肠杆菌载体 E.coli Vector 大肠杆菌宿主菌株 E.coli 细菌广宿主载体 bacateria broad range host vector 链霉菌载体及菌株 Streptomyces 芽孢杆菌载体 Bacillus vector 芽孢杆菌宿主菌株乳酸菌载体 lactic acid bacteria vector 乳酸菌宿主菌株 lactic acid bacteria strain 细菌基因敲除载体毕赤酵母载体毕赤酵母宿主菌株酿酒酵母载体酿酒酵母宿主菌株丝状真菌载体 mold/fungi vector 乳酸克鲁维酵母载体酵母真菌基因敲除基因编辑载体植物细胞载体 plant cell vector 农杆菌菌株Agrobacterium tumefaciens strain 植物细胞基因敲除载体 plant cell 哺乳动物细胞载体哺乳动物细胞荧光载体荧光素酶报告基因载体哺乳动物细胞基因敲除基因编辑载体杂交系统慢病毒载体腺病毒载体逆转录病毒载体杆状病毒表达载体基因干扰 RNAi载体基因/cDNA/ORF 转座子质粒系统 transposon 金黄色葡萄球菌载体 staphylococcus aureus 假单胞菌载体噬菌体 phage 不动杆菌载体双岐杆菌载体藻类表达载体链球菌载体厌氧菌载体基因治疗载体大肠杆菌基因突变体菌株细菌荧光质粒白色念珠菌载体体外转录载体谷氨酸棒杆菌载体酿酒酵母基因突变体菌株线虫载体斑马鱼载体 Zebra fish 果蝇，昆虫载体Drosophila 鱼类细胞载体 fish cell 分支杆菌载体克雷伯菌枯草芽孢杆菌基因缺失突变株
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产品编号	产品名称
	鼠伤寒沙门菌CVD908 基因组整合表达T7 RNA聚合酶，厌氧启动子nirB promoter启动

产品介绍

Attenuated Salmonella strains with defined gene deletions have been extensively evaluated as suitable live carriers of passenger antigens. A number of strategies for antigen delivery by these strains have been attempted, ranging from plasmid-based to chromosomal integration systems. We report here the chromosomal integration of the T7 RNA polymerase gene (T7pol) in the attenuated strain Salmonella enterica serovar Typhi (Salmonella typhi) CVD908 (aroC−, aroD−). The T7pol gene was amplified by PCR from Escherichia coli BL21(DE3) and cloned in the pNir3 plasmid under the control of the anaerobically inducible nirB promoter. Then it was subcloned in a pKTN701 derivative, suicide plasmid with the R6K ori, and flanked by the aroC gene. After evaluation of its functionality in E. coli SY327, the aroC-T7pol-aroC cassette was integrated into the aroC locus of S. typhi CVD908 by homologous recombination. The resulting strain, S. typhi CVD908-T7pol, was able to transcomplement two plasmids bearing the luc or the lacZ reporter genes controlled by the T7 promoter and produce luciferase and β-galactosidase under anaerobic culture conditions. Therefore, an inducible system for recombinant antigen production in attenuated S. typhi was achieved.