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Close relationship between SARS-coronavirus and group 2 coronavirus.
Ok Ju Kim1, Dong Hun Lee, Chan Hee Lee
1Division of Life Sciences and Research Institute for Biotechnology, Chungbuk National University, Cheongju, Chungbuk 361-763, Republic of Korea.
Journal of Microbiology (Seoul, Korea)
|March 24, 2006
Summary
Severe acute respiratory syndrome (SARS)-associated coronavirus (SARS-CoV) evolution and origins were studied. SARS-CoV shows a closer relationship with group 2 coronaviruses, suggesting a monophyletic origin.
Area of Science:
- Virology
- Genomics
- Evolutionary Biology
Background:
- Severe acute respiratory syndrome (SARS) emerged suddenly, causing concern due to its potential lethality.
- Understanding the origins and evolution of SARS-associated coronavirus (SARS-CoV) is crucial.
Purpose of the Study:
- To determine the phylogenetic position and evolutionary relationship of SARS-CoV with other coronavirus groups.
- To investigate the origins of SARS-CoV through comparative genomic analysis.
Main Methods:
- Phylogenetic analyses using Neighbor-joining, Maximum-likelihood, and Bayesian methods.
- Comparative genomic analyses of key coronavirus genes (Orf1ab, S, E, M, N).
- Sequence similarity and protein secondary structure analyses.
Main Results:
- Phylogenetic trees showed largely identical topology across different methods.
- Data support a monophyletic relationship between SARS-CoV and group 2 coronaviruses.
- Comparative genomic studies suggest SARS-CoV is more closely related to group 2 coronaviruses.
Conclusions:
- The findings strongly suggest that group 2 coronaviruses are the most closely related to SARS-CoV.
- Further detailed analyses are needed to fully elucidate the origins and evolution of SARS-CoV and other coronaviruses.