Related Experiment Video
Updated: Jun 20, 2026
09:00
Live Cell Imaging of Early Autophagy Events: Omegasomes and Beyond
Published on: July 27, 2013
18.5K
Boosting the toolbox for live imaging of translation
Maëlle Bellec1,2, Ruoyu Chen3,4, Jana Dhayni5
1Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS, 34293 Montpellier, France.
RNA (New York, N.Y.)
|July 26, 2024
Summary
Researchers optimized live imaging of nascent translation in Drosophila and mammalian cells. They developed new tools, including the ALFA-array system, for sensitive detection of multiple mRNA species during development.
Area of Science:
- Molecular Biology
- Cell Biology
- Developmental Biology
Background:
- Live imaging of protein synthesis is crucial for understanding gene expression regulation.
- Existing methods for visualizing nascent translation face challenges in sensitivity and applicability, particularly in complex organisms.
Purpose of the Study:
- To improve and develop novel fluorescent tools for sensitive live imaging and quantification of nascent translation.
- To establish robust methods for studying translation dynamics in the living Drosophila embryo and mammalian cells.
Main Methods:
- Characterization of five green fluorescent protein variants fused to single-chain fragment variable (scFv) for translation imaging.
- Development of the ALFA-array system using nanobody/tag recognition for multiplexed mRNA detection.
- Improvement of an RNA imaging system using an MCP-tdStaygold fusion.
Main Results:
- Identified disparities in photobleaching, aggregation, and intensity among different scFv-fluorescent protein variants.
- Demonstrated that scFv availability is critical for detecting translation throughout Drosophila development.
- Successfully implemented the ALFA-array for sensitive, simultaneous detection of multiple mRNA translation.
- Developed an enhanced RNA imaging system.
Conclusions:
- Optimized fluorescent tools and novel systems like ALFA-array significantly enhance the ability to image and quantify nascent translation in vivo.
- These advancements provide powerful approaches for dissecting translation regulation during development and in cellular contexts.
Related Concept Videos
01:31Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
01:31Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
02:07Improving Translational Accuracy
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
02:07Improving Translational Accuracy
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
01:31Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Proteins are called the...
Translation Produces the Building Blocks of Life
Proteins are called the...