Using Metagenomics to Characterize an Expanding Virosphere

Area of Science:

• Virology
• Genomics
• Bioinformatics

Background:

• Viruses represent a vast, understudied domain of life.
• Metagenomics has revolutionized the exploration of microbial and viral diversity.
• The known virosphere has significantly expanded due to recent advancements.

Purpose of the Study:

• To discuss the impact of metagenomics on understanding RNA virus diversity.
• To highlight the ongoing challenges in viral genome characterization.
• To address the 'dark matter' of unexplored viral genetic material.

Main Methods:

• Metagenomic sequencing and analysis.
• Bioinformatic approaches for viral genome reconstruction.
• Comparative genomics for viral diversity assessment.

Main Results:

• Metagenomics has revealed unprecedented diversity within RNA viruses.
• Significant portions of viral genomes remain uncharacterized ('dark matter').
• New viral lineages and gene families have been identified.

Conclusions:

• Metagenomics is crucial for expanding the known virosphere.
• Further research is needed to characterize divergent viral genomes.
• Understanding viral 'dark matter' is key to comprehending viral evolution and ecology.