In Vitro Transcription Translation
In Vitro Transcription Translation - Related Videos
02:36
Bacteriophage Synthesis Using a Cell-Free Transcription-Translation System
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2026
Source: Rustad, M., et al. Synthesis of Infectious Bacteriophages in an E. coli-based Cell-free Expression System. J. Vis. Exp. (2017).This video demonstrates the synthesis of bacteriophages using a cell-free transcription–translation (TXTL) system. A master mix is prepared using a bacterial crude extract, an energy mix, an amino acid mix, an inhibitor for a DNA-degrading enzyme, and bacteriophage DNA, then incubated. The in vitro molecular machinery enables viral protein expression and DNA...
08:33
Cell-Free In Vitro mRNA Translation In Drosophila Lysates
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2026
Here, we provide details on how to prepare lysates and perform in vitro translation using Drosophila embryos.
10:28
The Encapsulation of Cell-free Transcription and Translation Machinery in Vesicles for the Construction of Cellular Mimics
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Cited by 12 •
2013
Herein we describe simple methods for the preparation of vesicles, the encapsulation of transcription and translation machinery, and the monitoring of protein production. The resulting cell-free systems can be used as a starting point from which to build increasingly complex cellular mimics.
10:15
Isolation of Ribosome Bound Nascent Polypeptides in vitro to Identify Translational Pause Sites Along mRNA
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Cited by 2 •
2012
A technique to identify translational pause sites on mRNA is described. This procedure is based on isolation of nascent polypeptides accumulating on ribosomes during in vitro translation of a target mRNA, followed by the size analysis of the nascent chains using a denaturing gel electrophoresis.
09:28
In Vitro Transcription Assays and Their Application in Drug Discovery
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Cited by 6 •
2016
In this manuscript, we describe a protocol to functionally examine transcription and the inhibitory activity of antibacterial agents targeting bacterial transcription.
FAQs
RNA polymerase first produces messenger RNA from the DNA template, creating the transcript that ribosomes can use. Ribosomes then read this RNA with help from transfer RNAs, amino acids, energy sources, and other extract components to build a polypeptide. Keeping these stages in one reaction allows researchers to examine gene expression as a connected biochemical process.
The cell-free format removes much of the complexity associated with whole-cell systems while retaining the core steps needed to produce a protein. Researchers can therefore control reaction components and biochemical conditions directly, then examine how those changes influence gene expression. This makes the approach useful when a focused, adjustable experimental system is more informative than an intact cell.
Changes to the DNA sequence, reaction components, or biochemical conditions can alter gene-expression outcomes. The system permits these factors to be adjusted independently enough to investigate their effects on the RNA transcript and resulting polypeptide. Such controlled comparisons help connect sequence or reaction conditions with differences in protein production, rather than treating expression as a fixed property of the gene.
A typical workflow begins with a DNA template and a reaction mixture containing RNA polymerase, ribosomes, transfer RNAs, amino acids, energy sources, and other extract components. Transcription generates messenger RNA, after which translation produces a polypeptide. Researchers can vary selected components or biochemical conditions and then evaluate the resulting gene-expression output.
The method supports rapid protein production, reporter assays, enzyme characterization, and synthetic biology studies. Reporter assays can use expression output to monitor gene activity, while enzyme characterization uses the produced protein for functional investigation. Its adjustable cell-free format also helps synthetic biology researchers test designed sequences or reaction arrangements without relying on whole-cell growth.
Researchers can compare reactions that use different DNA sequences while keeping the broader cell-free setup controlled. Because the system links transcription to translation, sequence-dependent differences can be followed through the production of messenger RNA and the resulting polypeptide. This provides a direct experimental context for examining how sequence changes affect gene-expression outcomes.