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| Main Authors: | , , , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Viruses
2025
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/40143293/ |
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Table of Contents:
- Infection and Genomic Properties of Single- and Double-Stranded DNA Phages. Howard-Varona, Cristina Solonenko, Natalie E Burris, Marie Urvoy, Marion Sanderson, Courtney M Bolduc, Bejamin Sullivan, Matthew B Genome, Viral Bacteriophages DNA, Viral Flavobacteriaceae DNA, Single-Stranded Genomics Phylogeny Viral Proteins Host Specificity Bacterial viruses (phages) are abundant and ecologically impactful, but laboratory-based experimental model systems vastly under-represent known phage diversity, particularly for ssDNA phages. Here, we characterize the genomes and infection properties of two unrelated marine flavophages-ssDNA generalist phage phi18:4 (6.5 Kbp) and dsDNA specialist phage phi18:1 (39.2 Kbp)-when infecting the same strain #18 (Cba18), of the class . Phage phi18:4 belongs to a new family of ssDNA phages, has an internal lipid membrane, and its genome encodes primarily structural proteins, as well as a DNA replication protein common to ssDNA phages and a unique lysis protein. Phage phi18:1 is a siphovirus that encodes several virulence genes, despite not having a known temperate lifestyle, a CAZy enzyme likely for regulatory purposes, and four DNA methyltransferases dispersed throughout the genome that suggest both host modulation and phage DNA protection against host restriction. Physiologically, ssDNA phage phi18:4 has a shorter latent period and smaller burst size than dsDNA phage phi18:1, and both phages efficiently infect this host. These results help augment the diversity of characterized environmental phage-host model systems by studying infections of genomically diverse phages (ssDNA vs. dsDNA) on the same host.