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Updated: Nov 22, 2025
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Polysome Fractionation and Analysis of Mammalian Translatomes on a Genome-wide Scale
Published on: May 17, 2014
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Crosstalk between codon optimality and cis-regulatory elements dictates mRNA stability.
Santiago Gerardo Medina-Muñoz1,2, Gopal Kushawah1, Luciana Andrea Castellano1
1Stowers Institute for Medical Research, 1000 E 50th St, Kansas City, MO, 64110, USA.
Genome Biology
|January 6, 2021
Summary
Messenger RNA (mRNA) stability is crucial for embryonic development. Codon composition significantly influences mRNA stability, working with other elements like microRNAs to regulate gene expression during embryogenesis.
Area of Science:
- Molecular Biology
- Developmental Biology
- Genetics
Background:
- Messenger RNA (mRNA) stability critically regulates gene expression during embryogenesis.
- While 3' untranslated regions (3'UTRs) were traditionally viewed as key regulators, coding sequences also contain regulatory information.
- Translation in cis impacts mRNA stability in a codon-dependent manner, but its role in embryogenesis and interaction with microRNAs is unclear.
Purpose of the Study:
- To investigate the role of codon composition in mRNA stability during early embryogenesis.
- To determine how codon-dependent mRNA stability interacts with other regulatory elements, such as microRNAs.
- To elucidate the combinatorial control of mRNA stability in shaping gene expression.
Main Methods:
- Analysis of mRNA stability in zebrafish and Xenopus embryos.
- Experiments conducted in mouse and human cells.
- Investigation of microRNA targeting efficacy and its modulation by codon composition.
Main Results:
- Codon composition is a major predictor of mRNA stability in early embryos.
- This mechanism functions in concert with other cis-regulatory elements across species and cell types.
- MicroRNA targeting efficiency is influenced by codon optimization (stabilizing) or non-optimization (destabilizing).
- The microRNA miR-430 antagonizes codon-mediated mRNA stabilization in zebrafish embryogenesis.
Conclusions:
- Codon composition is a significant factor in regulating mRNA stability during embryogenesis.
- Combinatorial control involving codon composition and microRNAs shapes the gene expression landscape.
- This provides a framework for understanding complex gene regulation in development.
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