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Molecular Evolution of Human Coronavirus Genomes
Diego Forni1, Rachele Cagliani1, Mario Clerici2
1Scientific Institute IRCCS E. MEDEA, Bioinformatics, Bosisio Parini, Italy.
Trends in Microbiology
|October 17, 2016
Summary
Human coronaviruses evolve through genetic changes like recombination and gene gain/loss. These molecular evolution events drive the emergence of new viral species and host shifts, contributing to coronavirus outbreaks.
Area of Science:
- Virology
- Molecular Biology
- Evolutionary Biology
Background:
- Human coronaviruses (HCoVs), such as SARS-CoV and MERS-CoV, are zoonotic viruses originating from animals.
- HCoV genomes are large and encode diverse structural, nonstructural, and accessory proteins.
- Viral evolution involves mutation, recombination, and gene gains/losses, leading to genomic diversity.
Purpose of the Study:
- To review recent findings on the molecular evolution of HCoV genomes.
- To highlight the roles of recombination and adaptive events in HCoV evolution.
- To understand mechanisms contributing to new viral species, host shifts, and emergence.
Main Methods:
- Review of existing scientific literature on HCoV molecular evolution.
- Analysis of genomic data focusing on recombination and accessory protein variations.
- Synthesis of findings on adaptive events and their impact on viral emergence.
Main Results:
- HCoV genomes evolve via recombination, mutation, and gene flux (gains/losses).
- Accessory protein diversity is a key feature, even in related CoVs.
- Adaptive events and genomic changes facilitate host shifts and viral emergence.
Conclusions:
- Molecular evolution, particularly recombination and gene dynamics, is crucial for HCoV adaptation and emergence.
- Understanding these evolutionary processes is vital for predicting and mitigating future coronavirus outbreaks.
- Continued research into HCoV evolution is essential for public health preparedness.
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