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份 库存999份
| 货号： | MJ1249 |
| 供应商： | 上海名劲生物 |
| 数量： | 现货 |
| 英文名： | pMAL-p2x |
| 保质期： | 三年 |
| 保存条件： | 常温 |
| 规格： | 5ug质粒 |
| 质粒类型: | 大肠杆菌表达载体 |
|---|---|
| 表达水平: | 高 |
| 启动子: | Tac |
| 克隆方法: | 多克隆位点，限制性内切酶 |
| 载体大小: | 6721 bp |
| 5' 测序引物及序列: | MalE引物: 5'-GGTCGTCAGACTGTCGATGAAGCC-3'; MBP-F: 5'-gatgaagccctgaaagacgcgcag-3' |
| 3' 测序引物及序列: | pBad-R: 5'-gatttaatctgtatcagg-3'; M13-F: 5'-TGTAAAACGACGGCCAGT-3' |
| 载体标签: | N-MBP, N-Factor Xa |
| 载体抗性: | Ampicillin (氨苄青霉素) |
| 备注: | 融合表达麦芽糖结合蛋白MBP，蛋白定位于细胞周质。 |
订购信息
| 产品编号 | 产品名称 | 规格 | 价格 |
|---|---|---|---|
| 1249 | pMAL-p2x | 5ug质粒 | ¥1000.00 |
质粒图谱
载体描述
pMAL™系统是一种高效的蛋白融合表达及纯化系统。pMAL载体含有编码麦芽糖结合蛋白（Maltose Binding Protein, MBP）的大肠杆菌malE基因，其下游的多克隆位点便于目的基因插入，表达N端带有MBP的融合蛋白。通过"tac"强启动子和malE翻译起始信号使克隆基因获得高效表达，并进一步利用MBP对麦芽糖的亲和性达到用Amylose柱对融合蛋白的一步亲和纯化。
The system uses the pMAL vectors which are designed so that insertion interrupts a lacZα gene allowing a blue-to-white screen for inserts on X-gal (5). pMAL-c2 series has an exact deletion of the malE signal sequence, resulting in cytoplasmic expression of the fusion protein. pMAL-p2 series contains the normal malE signal sequence, which directs the fusion protein through the cytoplasmic membrane. pMAL-p2 fusion proteins capable of being exported can be purified from the periplasm. Between the malE sequence and the polylinker there is a spacer sequence coding for 10 asparagine residues. This spacer insulates MBP from the protein of interest, increasing the chances that a particular fusion will bind tightly to the amylose resin. The vectors also include a sequence coding for the recognition site of a specific protease. This allows the protein of interest to be cleaved from MBP after purification, without adding any vector-derived residues to the protein (6). For this purpose, the polylinker includes a restriction site superimposed on the sequence coding for the site of the specific protease. This is where the gene of interest is inserted. An EcoR I site in the same reading frame as that of λgt11 and a number of other useful sites are present directly downstream. The vectors also include the M13 origin of DNA replication which allows the production of single-stranded DNA for sequencing and mutagenesis by infecting with M13KO7 helper phage (NEB #N0315S).
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