A suggested new bacteriophage genus: "Viunalikevirus"

Area of Science:

• Virology
• Microbiology
• Genomics

Background:

• Bacteriophages are viruses that infect bacteria and play crucial roles in microbial ecosystems.
• The Myoviridae family is characterized by contractile tails, a common feature in many potent bacterial viruses.
• Accurate classification of bacteriophages is essential for understanding their evolution and ecological impact.

Purpose of the Study:

• To propose a new genus, "Viunalikevirus", within the Myoviridae family.
• To identify and describe the distinguishing features of seven specific bacteriophages.
• To differentiate the proposed genus from the existing Tevenvirinae subfamily.

Main Methods:

• Comparative analysis of bacteriophage morphology, including head and tail dimensions.
• Genome sequencing and comparative genomic analysis of seven bacteriophages.
• Examination of conserved regulatory sequences and DNA base composition.

Main Results:

• Seven bacteriophages (Salmonella phages ViI, SFP10, ΦSH19; Escherichia phages CBA120, PhaxI; Shigella phage phiSboM-AG3; Dickeya phage LIMEstone1) share key myovirus characteristics.
• Distinctive features include conserved regulatory sequences, a horizontally acquired tRNA set, and potential thymine substitution in DNA.
• Analysis revealed four distinct tail spike proteins, potentially forming umbrella-like tail structures.

Conclusions:

• The proposed "Viunalikevirus" genus exhibits unique morphological and genomic traits.
• These characteristics differentiate it from the Tevenvirinae subfamily, despite an observed evolutionary relationship.
• This classification refines our understanding of bacteriophage diversity and evolution within Myoviridae.