pTrcHis2A大肠表达质粒

pTrcHis2A大肠表达质粒

基本信息

启动子: Trc/lac promoter

复制子: PBR322 ori

终止子: rrnB TT

质粒大小: 4406bp

质粒标签: C-Myc，C-6xHis

原核抗性: 氨苄青霉素Amp

克隆菌株: 大肠杆菌DH5α

培养条件: 37℃，有氧，LB

表达宿主: 大肠杆菌

培养条件: 37℃，有氧，LB

诱导方式: IPTG或乳糖及其类似物

5'测序引物: pTrcHis-F: GAGGTATATATTAATGTATCG

3'测序引物: pTrcHis-F: GAGGTATATATTAATGTATCG

备注: pTrc表达质粒

质粒简介

         pTrcHis2A质粒是一个大肠杆菌蛋白表达载体，Trc启动子驱动目的基因的表达。The pTrcHis2 plasmids are pBR322-derived expression vectors designed for efficient recombinant protein expression and purification in E. coli. High levels of expression are possible using the trc (trp-lac) promoter (Egon et al., 1983) and the rrnB anti-termination region (Li et al., 1984). The trc promoter contains the –35 region of the trp promoter together with the –10 region of the lac promoter (Brosius et al., 1985; Egon et al., 1983; Mulligan et al., 1985). To regulate expression, the gene encoding Lac repressor (lacIq) is provided in the pTrcHis2 vectors, allowing regulation of the trc promoter regardless of whether the host strain contains a gene encoding the Lac repressor. Isopropyl-Beta-D-thiogalactopyranoside (IPTG) is used to induce expression of your gene. Translation is enhanced by the bacteriophage T7 gene 10 translation enhancer and a minicistron that provides highly efficient translational restart into the open reading frame of the multiple cloning site. DNA inserts are positioned downstream and in frame with the initiation ATG and a C-terminal fusion peptide. The C-terminal peptide encodes the myc epitope and six histidine residues that function as a metal binding site in the expressed protein.

质粒图谱

pTrcHis2A大肠表达质粒使用说明：

     1、收到质粒干粉后请先5000rpm离心1min，再加入20μl无菌水溶解质粒，室温放置1min；

     2、从-80℃冰箱中取出相应的感受态，置于冰盒上解冻，并做好标记；

     3、取2μl质粒加至100μl感受态中，冰浴30min；

     4、42℃热激90s，再冰浴2min；

     5、加入900μl无抗的LB液体培养基，180rpm震荡培养45min；

     6、6000rpm离心5min，仅留100ul上清混匀菌体沉淀；

     7、混匀后的菌液加至对应抗性的LB平板上，倒入适量玻璃珠，涂匀液体；

     8、将平板正向培养1h，再倒置培养12h~16h；

     9、挑取单克隆菌落至对应抗性的LB液体培养基中，震荡培养12h~16h，根据实验需要提取质粒。

pTrcHis2A大肠表达质粒注意事项：

      1、如果您收到的是甘油菌种，请先四区划线，挑取单克隆培养。

      2、如果第二天转化平板长的过多，请将质粒按比例稀释后再转化。