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Recent Advances in Structural Studies of Single-Stranded RNA Bacteriophages
Jirapat Thongchol1, Zachary Lill1, Zachary Hoover1
1Center for Phage Technology, Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA.
Viruses
|October 28, 2023
Summary
Positive-sense single-stranded RNA (ssRNA) bacteriophages infecting E. coli have small genomes and simple infection cycles. Recent studies reveal thousands of ssRNA phage sequences, enhancing knowledge of their prevalence and hosts.
Area of Science:
- Microbiology
- Virology
- Molecular Biology
Background:
- Positive-sense single-stranded RNA (ssRNA) bacteriophages (phages) infecting E. coli have been studied for decades.
- These phages possess small genomes (3-4 kb) encoding typically four essential proteins.
- Their infectious cycle involves adsorption, genome entry, replication, assembly, and host lysis.
Purpose of the Study:
- To review significant investigations into ssRNA phages.
- To focus on the structural aspects of ssRNA phages.
- To provide insights into the various stages of the ssRNA phage infectious cycle.
Main Methods:
- Literature review of extensive research on ssRNA phages.
- Analysis of recent advancements in metagenomics and transcriptomics data.
- Focus on structural biology and infectious cycle studies.
Main Results:
- Identification of approximately 65,000 ssRNA phage sequences through metagenomics and transcriptomics.
- Expanded understanding of ssRNA phage prevalence and potential hosts.
- Detailed insights into the structural components and life cycle stages of ssRNA phages.
Conclusions:
- ssRNA phages are a significant group of viruses with well-defined, yet complex, infectious cycles.
- Recent genomic and transcriptomic data have greatly expanded the known diversity of ssRNA phages.
- Further research into ssRNA phage structure and function is crucial for understanding their ecological roles.
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