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Cryogenic electron microscopy (cryo-EM) single-particle analysis has revolutionized the structural analysis of icosahedral viruses, including tailed bacteriophages. In recent years, localized (or focused) reconstruction has emerged as a powerful data analysis method to capture symmetry mismatches and resolve asymmetric features in icosahedral viruses. Here, we describe the methods used to reconstruct the 2.65-MDa tail apparatus of the Shigella phage Sf6, a representative member of the Podoviridae superfamily.
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http://dx.doi.org/10.1007/978-1-0716-3549-0_14 | DOI Listing |
Int J Biol Macromol
September 2025
Laboratory of NMR research of biosystems, Institute of Theoretical and Experimental Biophysics RAS, ul. Institutskaya 3, 142290 Pushchino, Russia.
A search for bacteriophage proteins with an EF-like calcium-binding loop, first discovered in the phage T5 endolysin (EndoT5), revealed a group of 71 peptidases of the M15_C subfamily. All the sequences found belonged to the phages infecting Gram-negative bacteria (Escherichia, Salmonella, Klebsiella, Shigella, Edwardsiella, Pectobacterium, Aeromonas, Shewanella etc.) In this work, we have characterized a hypothetical protein of Aeromonas bacteriophage 3, a representative of this group.
View Article and Find Full Text PDFGut Pathog
August 2025
Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Cairo, 11566, Egypt.
Gastrointestinal (GI) infections, caused by pathogens such as , sp., sp., and , pose significant global health challenges due to their prevalence, severity, and increasing resistance to conventional treatments.
View Article and Find Full Text PDFmedRxiv
July 2025
Infectious Diseases Division, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh.
Bacteriophages (phages) likely play a critical role in modulating transmission dynamics of diarrheal pathogens. This study investigated the role of phages in modulating the prevalence and seasonal patterns of major diarrheal pathogens, O1 (VCO1), enterotoxigenic (ETEC), spp., and spp.
View Article and Find Full Text PDFbioRxiv
July 2025
Microbiological Sciences Department, North Dakota State University, Fargo, ND.
Bacteriophages are gaining increased research attention as alternatives to antibiotics and microbiome manipulation tools to enhance feed efficiency and animal health in cattle. However, challenges associated with phage specificity, microbial ecosystem variations, and the absence of effective screening methods have hindered harnessing the power of phage application in cattle. The objectives of this study were to (i) optimize phage screening method for microbial samples obtained from different cattle body sites, (ii) isolate lytic phages against key bovine pathogens and commensal bacteria, and (iii) characterize the isolated phages and their bacterial hosts.
View Article and Find Full Text PDFBMC Res Notes
July 2025
Center for Bio-separation Technology, Vellore Institute of Technology, Vellore, 632014, Tamil Nadu, India.
Objective: Antibiotic resistance is one of the major causes of the increase in bacterial infections worldwilde. This is why it is the need of an hour to look for an alternative treatment; bacteriophage therapy is one of the most potent. Phages have been and still are being isolated against Shigella species but many of them remain uncultured and uncharacterized.
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