The Phage Proteomic Tree: a genome-based taxonomy for phage

Area of Science:

• Microbiology
• Bioinformatics
• Genomics

Background:

• Phages are the most abundant biological entities on Earth, yet their biodiversity, biogeography, and phylogeny remain largely unknown.
• Current phage taxonomy relies on culturing and physical virion characteristics, limiting comprehensive classification.
• No sequence-based taxonomic systems have been established for phages.

Purpose of the Study:

• To establish a genome-based taxonomic system for phages.
• To analyze phage biodiversity and phylogeny using genomic data.
• To propose a new framework for phage classification.

Main Methods:

• Construction of the Phage Proteomic Tree based on the overall similarity of 105 completely sequenced phage genomes.
• Comparative genomic analysis to determine phage relationships.
• Identification of genetic markers for biodiversity monitoring.

Main Results:

• The Phage Proteomic Tree successfully places phages relative to their neighbors and the entire dataset.
• The proposed method groups phages into taxa that predict biological characteristics.
• Genetic markers for monitoring phage biodiversity were highlighted.

Conclusions:

• The Phage Proteomic Tree provides a robust, genome-based method for phage classification.
• This approach can significantly advance our understanding of phage biodiversity and evolution.
• A genome-based taxonomic system is proposed as the future standard for phage taxonomy.