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Updated: Oct 1, 2025
12:57
Genome-wide Quantification of Translation in Budding Yeast by Ribosome Profiling
Published on: December 21, 2017
11.6K
The space between notes: emerging roles for translationally silent ribosomes
Patrick R Smith1, Sapna C Pandit2, Sarah Loerch2
1The University of Texas at Dallas, Department of Biological Sciences, Richardson, TX, USA.
Trends in Biochemical Sciences
|March 5, 2022
Summary
Idle ribosomes, fully assembled but lacking mRNA, are regulated by various biological conditions. Their abundance influences translation control and may shield them from degradation, offering a new perspective on translational regulation.
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- Ribosomes are essential for protein synthesis (translation).
- Ribosomes can exist in inactive, mRNA-free states, termed idle ribosomes.
- The regulation and function of idle ribosomes are not fully understood.
Purpose of the Study:
- To explore the biological conditions influencing idle eukaryotic ribosome abundance.
- To discuss the potential roles of idle ribosomes in regulating translation and cellular processes.
- To highlight open questions regarding the function of idle ribosomes.
Main Methods:
- Literature review and synthesis of existing research on ribosome biology.
- Analysis of studies investigating ribosome populations under various cellular conditions.
- Conceptual framework development for idle ribosome function.
Main Results:
- Idle ribosome abundance is modulated by diverse factors including viral infection, nutrient deprivation, and developmental signals.
- Vacant ribosomes may serve to temporarily halt translation and prevent ribosome degradation.
- Specific factors binding to idle ribosomes might confer unique functions.
Conclusions:
- Regulated shifts in the balance between idle and active ribosomes represent a mechanism for fine-tuning protein translation.
- Idle ribosomes are a dynamic population with potential roles beyond simply being translationally repressed.
- Further research is needed to fully elucidate the biological significance and functional diversity of idle ribosomes.
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