Nascent Transcripts
Nascent Transcripts - Related Videos
08:26
Transcriptional Analysis by Nascent RNA FISH of In Vivo Trophoblast Giant Cells or In Vitro Short-term Cultures of Ectoplacental Cone Explants
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Cited by 2 •
2016
Trophoblast giant cells (TGCs) play a key role in the placenta to ensure a healthy pregnancy. We present a protocol for assessing the transcriptional status of genes in TGCs by nascent fluorescent in situ hybridization on cryostat sections of post-implantation embryos or short-term cultures of embryonic day 7 ectoplacental cones.
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.
12:12
Analysis of Termination of Transcription Using BrUTP-strand-specific Transcription Run-on (TRO) Approach
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Cited by 10 •
2017
We describe a basic experimental approach for analysis of termination of transcription by RNA polymerase II in vivo using BrUTP by the strand-specific transcription run-on (TRO) approach in budding yeast. This protocol can be extended to study transcription termination by other RNA polymerases both in yeast and higher eukaryotes.
09:14
Examination of Proteins Bound to Nascent DNA in Mammalian Cells Using BrdU-ChIP-Slot-Western Technique
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Cited by 3 •
2016
In this protocol, we describe a novel BrdU-ChIP-Slot-Western technique to examine proteins and histone modifications associated with newly synthesized or nascent DNA.
02:16
Transcription Factors
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2019
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
FAQs
Nascent-transcript analysis separates changes in RNA production from changes that occur after transcription. Because measurements focus on RNA while it is being synthesized, they can indicate whether a gene responds through altered transcriptional activity rather than through differences in splicing, stability, or degradation. This distinction helps geneticists interpret why mature RNA levels rise or fall.
Short-lived and incomplete products provide information that mature-RNA measurements can miss. Their presence reflects transcriptional activity before the full RNA molecule is processed and released, so they can help expose transient changes or interruptions in transcription. In particular, nascent RNA measurements can reveal transcriptional pausing, offering a more immediate view of polymerase behavior during gene expression.
Signals from newly produced RNA can be examined for evidence of promoter activity and enhancer effects. These measurements connect regulatory features with transcriptional output before later RNA processing obscures the initial response. They can therefore help identify whether a genetic difference is associated with altered transcriptional regulation.
Researchers use approaches that label or sequence newly produced RNA, then analyze the resulting material as a readout of transcription occurring at that time. The key design principle is to preserve the distinction between newly synthesized molecules and the mature RNA pool. This allows investigators to study active genes, including products that are short-lived, incomplete, or not strongly represented after processing.
These measurements can show whether genetic regulation is reflected directly in transcriptional output and whether promoter or enhancer activity changes under the condition being studied. They also support analysis of transcriptional pausing and cell-specific gene regulation. Because the signal is collected early in expression, the results help separate transcriptional control from later effects that alter RNA abundance.
Comparing newly synthesized RNA across cell types or cellular conditions can reveal regulation specific to a particular cellular context. Such comparisons indicate which genes are actively being transcribed rather than merely retaining stable mature RNA. In genetics, this helps connect differences in gene expression to transcriptional control and distinguish them from variation caused by RNA processing or degradation.