pMSCVpuro 载体

质粒类型: 逆转录病毒载体
高拷贝/低拷贝: 低拷贝
启动子: LTR
克隆方法: 多克隆位点,限制性内切酶
载体大小: 6264 bp (查看载体序列)
载体抗性: Ampicillin (氨苄青霉素)
筛选标记: Hygromycin(潮霉素)
产品编号 产品名称 规格 价格
VT1539 pMSCVpuro 2ug 点击询价

The Murine Stem Cell Virus (MSCV) vectors were derived from the Murine Embryonic Stem Cell Virus (MESV) and the LN retroviral vectors (1,2). Upon transfection into a packaging cell line, pMSCVpuro transiently expresses, or integrates and stably expresses, a transcript containing the extended viral packaging signal Ψ+, the puromycin resistance gene, and a gene of interest. The vectors achieve stable, high-level gene expression in hematopoietic and embryonic stem cells through a specifically designed 5' long terminal repeat (LTR). This LTR is from the murine stem cell PCMV virus, and it differs from the MoMuLV LTR used in other retroviral vectors by several point mutations and a deletion. These changes enhance transcriptional activation and prevent transcriptional suppression in embryonic stem and embryonal carcinoma cells. As a result, the LTR drives high-level constitutive expression of a target gene in stem cells or other mammalian cell lines (3). A gene can be cloned into the multiple cloning site immediately downstream of this LTR. The murine phosphoglycerate kinase (PKG) promoter (PPKG) controls expression of the puromycin resistance gene (Puror) for antibiotic selection in eukaryotic cells. pMSCVpuro also contains the pUC origin of replication and E. coli Ampr gene for propagation and antibiotic selection in bacteria.


pMSCVpuro can be transfected into a packaging cell line such as the RetroPackTM PT67 Cell Line (Cat. No. 631510). Once in the cell, RNA from the vector is packaged into infectious, replication-incompetent retroviral particles. pMSCVpuro does not contain the gag, pol, and env structural genes necessary for particle formation and replication: these genes are stably integrated into the PT67 genome (4–7). Introduction of pMSCVpuro into a packaging cell line results in production of hightiter, replication-incompetent infectious virus particles. These particles can infect target cells and transmit the gene of interest to them. However, they cannot replicate because the target cells lack viral structural genes. The process of separately introducing and integrating the structural genes into the packaging cell line minimizes the chances of producing replication-competent virus due to recombination events during cell proliferation.