Related Experiment Video
Updated: Jul 16, 2026
10:26
TRAP-rc, Translating Ribosome Affinity Purification from Rare Cell Populations of Drosophila Embryos
Published on: September 10, 2015
NaP-TRAP: A Versatile and Accessible Workflow to Dissect Principles of Translational Regulation and mRNA Stability
Amit Gupta1,2,3, Anna Z Struba1,3, Srihari Madhavan1,3
1Department of Genetics and Genome Sciences, UConn Health, Farmington, Connecticut.
Current Protocols
|July 15, 2026
Summary
We developed Nascent Peptide Translating Ribosome Affinity Purification (NaP-TRAP), a new method to measure messenger RNA (mRNA) translation and abundance simultaneously. This accessible technique decodes mRNA regulatory logic for stability and translation in various biological systems.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Messenger RNA (mRNA) translation into protein is crucial for cellular function and is tightly regulated.
- Understanding the cis-regulatory elements controlling mRNA fate (stability and translation) is vital but challenging.
- Existing massively parallel reporter assays (MPRAs) primarily focus on transcript stability, with limited options for translation analysis.
Purpose of the Study:
- To introduce Nascent Peptide Translating Ribosome Affinity Purification (NaP-TRAP), a novel reporter-based method.
- To enable simultaneous measurement of mRNA translation and abundance.
- To provide an accessible and versatile platform for studying mRNA regulatory elements.
Main Methods:
- NaP-TRAP utilizes immunoprecipitation of epitope-tagged nascent peptide chains to capture translation.
- The method provides frame-specific readouts without requiring specialized instrumentation.
- It is scalable for both single reporters and complex libraries, adaptable to in vivo and in vitro systems.
Main Results:
- NaP-TRAP allows for the assessment of cis-regulatory elements across the entire mRNA.
- The technique offers robust, quantitative data on both translation and mRNA abundance.
- Experimental workflows are streamlined, with benchwork completable in 4-5 days.
Conclusions:
- NaP-TRAP offers an accessible, robust, and quantitative platform for decoding mRNA regulatory logic.
- This method facilitates the study of translation and stability in diverse biological contexts.
- It overcomes limitations of previous translation-focused MPRAs, enabling broader research applications.
Related Concept Videos
01:29Translational Regulation
Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
02:51mRNA Stability and Gene Expression
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
02:51mRNA Stability and Gene Expression
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
02:27Nonsense-mediated mRNA Decay
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Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
02:27Nonsense-mediated mRNA Decay
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
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01:53RNA Stability
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