Single Expression Vector
Single Expression Vector - Related Videos
11:21
Streamlined Single Cell TCR Isolation and Generation of Retroviral Vectors for In Vitro and In Vivo Expression of Human TCRs
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Cited by 3 •
2017
The current protocol combines single cell paired human TCR alpha and beta chain sequencing with streamlined generation of retroviral vectors compatible with in vitro and in vivo TCR expression.
04:16
Lentiviral Vector-Based Perivitelline Injection: A Method to Transduce the Gene of Interest Into Fertilized Single-Cell Mouse Oocytes
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2025
This video describes the pronuclear injection of lentiviral vectors into the perivitelline space of a fertilized mouse embryo. The lentivirus contains the transgene, which is incorporated into the genome of the fertilized embryo, eventually giving rise to transgenic mice.
08:57
Production of Recombinant PRMT Proteins using the Baculovirus Expression Vector System
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Cited by 22 •
2021
The baculovirus expression vector system (BEVS) is a robust platform for expression screening and production of protein arginine methyltransferases (PRMTs) to be used for biochemical, biophysical, and structural studies. Milligram quantities of material can be produced for the majority of PRMTs and other proteins of interest requiring a eukaryotic expression platform.
07:59
Temporal Quantification of MAPK Induced Expression in Single Yeast Cells
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Cited by 6 •
2013
Two complementary methods based on flow cytometry and microscopy are presented which enable the quantification, at the single cell level, of the dynamics of gene expression induced by the activation of a MAPK pathway in yeast.
09:53
Specific Marking of HIV-1 Positive Cells using a Rev-dependent Lentiviral Vector Expressing the Green Fluorescent Protein
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2010
We have developed a lentiviral vector that possesses, in addition to the Tat-responsive LTR, the Rev-response element (RRE) that can regulate reporter gene expression in an HIV-1 Tat- and Rev-dependent fashion. The vector permits the specific detection of replicating HIV in living cells via the expression of GFP.
FAQs
Promoter choice is central because it determines whether the host cell can recognize the expression signal and begin transcription of the inserted coding sequence. Once transcription starts, the resulting messenger RNA provides the template for host ribosomes to synthesize the target protein. A host-compatible promoter therefore connects the DNA construct to the cell’s own gene-expression machinery.
These components support different stages of construct use. Regulatory elements help organize expression around the coding sequence, while the transcription terminator signals the end of transcription. The selectable marker helps identify cells that retain the recombinant plasmid after its introduction. Together, these features make expression more controllable and make the construct easier to track in a host-cell experiment.
The vector must function within the biological machinery of the chosen host cell. In particular, the promoter needs to be compatible with that host so transcription can occur, and the resulting messenger RNA must be accessible to host ribosomes for translation. If these connections fail, the coding sequence may be present without producing useful amounts of the target protein.
A typical workflow begins by assembling the target coding sequence with the promoter, regulatory elements, terminator, and selectable marker in a plasmid construct. The recombinant DNA is then introduced into host cells, where retained constructs can be identified through the selectable feature. Expression follows promoter-driven transcription and ribosomal translation, producing material for downstream biochemical investigation.
They provide a controlled source of a chosen protein for experiments that require biochemical material. For example, expressed enzymes can be examined in relation to molecular function, while the produced protein can support purification and structural analysis. These uses connect the composition and structure of a biomolecule with its chemical reactivity or biological function.
The resulting protein can supply material for studies of enzyme activity, molecular structure, and function-related assays. In chemistry, such experiments may help relate a protein’s molecular structure to its reactivity, while purification can provide a more suitable preparation for analysis. The value of the construct therefore lies not only in expression, but also in enabling focused downstream measurements.