Translating Ribosome Affinity Purification
Translating Ribosome Affinity Purification - Related Videos
10:26
TRAP-rc, Translating Ribosome Affinity Purification from Rare Cell Populations of Drosophila Embryos
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Cited by 18 •
2015
Translating Ribosome Affinity Purification (TRAP) is able to capture cell-type-specific translation of mRNA. Here we report the first TRAP protocol dedicated to isolation of mRNA in rare cell populations of Drosophila embryos.
08:53
Translating Ribosome Affinity Purification (TRAP) for RNA Isolation from Endothelial Cells In Vivo
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Cited by 6 •
2019
We present an approach to purify ribosome-bound mRNA from vascular endothelial cells (ECs) directly in mouse brain, lung and heart tissues via EC-specific genetic tag of enhanced green fluorescence protein (EGFP)in ribosomes in combination with RNA purification.
09:13
Chromatographic Purification of Highly Active Yeast Ribosomes
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Cited by 7 •
2011
Contamination of preparations of eukaryotic ribosomes purified by traditional methods by co-purifying nucleases and proteases negatively impacts on downstream biochemical and structural analyses. A rapid and simple chromatographic purification method is used to solve this problem using yeast ribosomes as a model system.
11:19
Isolation of Translating Ribosomes Containing Peptidyl-tRNAs for Functional and Structural Analyses
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Cited by 2 •
2011
A major impediment to biochemical analyses of ribosomes containing nascent peptidyl-tRNAs has been the presence of other ribosomes in the same samples, ribosomes not involved in the translation of the specific mRNA sequence being analyzed. We developed a simple methodology to purify, exclusively, the ribosomes containing the nascent peptidyl-tRNA of interest.
09:41
Translating Ribosome Affinity Purification (TRAP) to Investigate Arabidopsis thaliana Root Development at a Cell Type-Specific Scale
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Cited by 9 •
2020
Translating ribosome affinity purification (TRAP) offers the possibility to dissect developmental programs with minimal processing of organs and tissues. The protocol yields high-quality RNA from cells targeted with a green fluorescent protein (GFP)-labeled ribosomal subunit. Downstream analysis tools, such as qRT-PCR or RNA-seq, reveal tissue and cell type-specific expression profiles.
FAQs
The genetically encoded epitope tag provides a molecular handle on a ribosomal protein. In a tissue lysate, affinity antibodies or beads recognize that tag and capture the ribosomes carrying it. Because associated messenger RNAs remain linked to these ribosomes during purification, the tag connects the selected cellular population to the RNA recovered for downstream analysis.
Total RNA abundance reflects the messenger RNAs present in a sample, whereas TRAP enriches transcripts associated with ribosomes and therefore being translated. These measurements can differ because transcript presence does not necessarily indicate the same translation pattern. Comparing the two types of information helps distinguish changes in RNA abundance from changes specifically associated with protein synthesis.
The method uses a genetically encoded tag to mark ribosomes in selected cells or tissues, allowing their associated messenger RNAs to be recovered from a larger lysate. This avoids physically isolating rare cell populations before analysis. As a result, researchers can examine cell-specific translation patterns even when the relevant cells are difficult to separate directly.
A typical workflow begins with tissue lysis, followed by affinity capture of tagged ribosomes using antibodies or beads. The messenger RNAs associated with the captured ribosomes are then purified and analyzed, often by sequencing. This sequence of enrichment and analysis produces a cell-focused view of transcripts linked to translation rather than a general tissue RNA profile.
Sequencing the purified messenger RNAs can identify which transcripts are associated with translating ribosomes in the selected cells or tissue. The resulting profile supports comparisons of translation patterns between biological conditions or cell populations. Researchers can use those comparisons to investigate how protein synthesis changes, rather than relying only on differences in total RNA abundance.
TRAP supports studies in which translation must be resolved within organized or mixed biological samples. The approach has been applied to questions involving development, neural circuits, tissue organization, and disease-related changes in protein synthesis. Its value in these settings comes from linking cell-specific ribosome-associated messenger RNAs to broader changes in biological state.