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Lucia/SEAP - Hygromycin resistance
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Lucia/SEAP - Blasticidin resistance
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Lucia/SEAP - Neomycin resistance
Expression plasmids pVITRO2-Lucia/SEAP are developed mainly for in vitro studies.
pVITRO2-Lucia/SEAP allows the ubiquitous and constitutive co-expression of two reporter genes: Lucia (secreted luciferase) and SEAP (secreted embryonic alkaline phosphatase). pVITRO2-Lucia/SEAP plasmids can be stably transfected in mammalian cells and the reporter genes are expressed at high levels.
pVITRO2-Lucia/SEAP plasmids carry two human ferritin composite promoters, FerH (heavy chain) and FerL (light chain). To eliminate the iron regulation, their 5’UTRs have been replaced by the 5’UTR of the mouse and chimpanzee EF-1α genes. pVITRO2-Lucia/SEAP plasmids are available with different selectable markers that are active both in E. coli and mammalian cells.
Promoters: SV40/hFerH/mEF1α & CMV/hFerL/chEF1α
Selection markers active both in E. coli and mammalian cells:
- bsr (blasticidin resistance)
- hph (hygromycin resistance)
- neo (kanamycin/G418 resistance).
- Lucia luciferase (secreted luciferase)
- SEAP (secreted embryonic alkaline phosphatase)
These products are covered by a Limited Use License (See Terms and Conditions).Back to the top
- 20 µg of lyophilized DNA
- 4 pouches of the appropriate E. coli Fast-Media® (2 TB and 2 Agar)
Gene Combinations in a Single Plasmid
Co-expression of two or more genes from a single vector is more efficient and convenient than using two separate vectors. pVITRO2-Lucia/SEAP are multigenic plasmids that contain two distinct transcription units (TU).
Strong and Constitutive Expression of Two Transgenes
Each pVITRO2-Lucia/SEAP plasmid features two constitutive promoters that drive high levels of expression from two separate TU in a large number of mammalian cell lines.
Transcriptional interference is minimized by using promoters that are coordinately activated, and strong polyadenylation signals (polyA). pVITRO2-Lucia/SEAP plasmids contain two human ferritin composite promoters, FerH (heavy chain) and FerL (light chain), combined to the SV40 and CMV enhancers respectively. To eliminate the iron regulation, their 5’UTRs have been replaced by the 5’UTR of the mouse and chimpanzee EF-1α genes.
Single Selection Marker for E. coli and Mammalian Cells
pVITRO2-Lucia/SEAP plasmids are available with a selectable marker that is active both in E. coli and mammalian cells: bsr (blasticidin resistance), hph (hygromycin resistance) or neo (kanamycin/G418 resistance).
In bacteria, the resistance gene is expressed from the E. coli EM7 promoter. In mammalian cells, it is transcribed from the promoter located 3’ of the Ori, as a polycistronic mRNA and translated through the IRES of the Foot and Mouth Disease Virus.
Two Reporter Genes
pVITRO2-Lucia/SEAP express two reporter genes: Lucia luciferase and SEAP
Lucia secreted luciferase and SEAP (secreted embryonic alkaline phosphatase) are commonly used reporter proteins.
Lucia is a secreted luciferase with strong bioluminescent activity. The Lucia luciferase reporter gene is ideal for promoter activity and gene expression studies. Lucia luciferase activity can be detected and quantified directly in the culture medium of transfected cells using QUANTI-Luc™ detection reagent.
pVITRO2-Lucia/SEAP plasmids can be used as control plasmids for pVITRO2-MCS or cloning vectors. The reporter genes are flanked by unique restriction sites and can be easily replaced by open reading frames chosen from InvivoGen’s Gene A-List.Back to the top
• hFerH and hFerL composite promoters: Ferritin is a 24 subunit protein composed of two subunit types, termed H (heavy) and L (light). Ferritin is ubiquitously expressed. Its synthesis is highly regulated by the iron status of the cell. To eliminate the iron regulation of the ferritin promoters, the 5’UTR of FerH and FerL have been replaced by the 5’UTR of the mouse and chimpanzee elongation factor 1 (EF1) genes, respectively.
• SV40 enhancer which is comprised of a 72-base-pair repeat allows the enhancement of gene expression in a large host range. The enhancement varies from 2-fold in non-permissive cells to 20-fold in permissive cells.
• CMV enhancer: The major immediate early enhancer of the human cytomegalovirus (HCMV) is composed of unique and repeated sequence motifs. The HCMV enhancer can substitute for the 72-bp repeats of SV40 and is severalfold more active than the SV40 enhancer.
• SV40 pAn: the Simian Virus 40 late polyadenylation signal enables efficient cleavage and polyadenylation reactions resulting in high levels of steady-state mRNA.
• pMB1 ori: a minimal E. coli origin of replication to limit vector size, but with the same activity as the longer Ori.
• FMDV IRES: The internal ribosome entry site of the Foot and Mouth Disease Virus enables the translation of two open reading frames from one mRNA with high levels of expression.
• EM7 is a bacterial promoter that enables the constitutive expression of the antibiotic resistance gene in E. coli.
• Antibiotic resistance gene :
- Resistance to Blasticidin S is conferred by the bsr gene from Bacillus cereus.
- hph gene confers resistance to Hygromycin B both in E. coli and mammalin cells.
- The neo gene from Tn5 confers resistance to Kanamycin in E.coli and G418 in mammalian cells.
In bacteria, the resistance gene is expressed from the constitutive E. coli EM7 promoter. In mammalian cells, the resistance gene is transcribed from the rat EF-1α promoter as a polycistronic mRNA and translated via the FMDV IRES.
• EF1 pAn is a strong polyadenylation signal.
• Lucia luciferase gene: Lucia is a secreted luciferase with strong bioluminescent activity.Back to the top