Bacteriophages of Thermophilic Bacteria

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Environmental Microbiology".

Deadline for manuscript submissions: 15 March 2025 | Viewed by 2512

Special Issue Editors


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Guest Editor
Department of Molecular Biotechnology, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, Poland
Interests: genetic engineering technology

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Guest Editor
Phage Therapy Center, University Center for Applied and Interdisciplinary Research, University of Gdansk, Gdansk, Poland
Interests: biology of bacteriophages; biodiversity of bacteriophages; regulation of bacteriophage development; regulation of phage gene expression; control of phage DNA replication; phage therapy; phages bearing genes of toxins; bacteriophage genomics
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Special Issue Information

Dear Colleagues,

The bacteriophages of thermophiles, also known as thermophages, have attracted increasing interest due to their important roles in many biogeochemical and ecological processes, as well as their biotechnology applications. However, they are under-represented in the known prokaryotic virosphere due to the lack of in-depth investigation. Thus, there is considerable potential for the discovery of novel bacteriophage–host systems in various environments. This Special Issue invites the submission of works on thermophages and thermophilic bacteria, including those that are moderately thermophilic and those living under a temperature of approximately 45–70 oC. Ecosystems that provide these conditions are diverse and include terrestrial hot springs, deep-sea hydrothermal vent areas, shallow ocean waters above geothermally active beds, human-generated hot waters, hot deserts, compost piles, greenhouse soils, silage, rotting straw, river sludge, stable manure and digested sewage sludge. We aim to collect manuscripts that deal with the discovery of newly identified thermophages and their ecology, genomics, proteomics, molecular biology and biotechnology applications. We also welcome manuscripts that deal with the comparative deciphering of the molecular basis of thermophage biology and the analysis of the environmental aspects of their effects on the thermophile community. Moreover, papers focused on products of thermophilic bacteriophage genes  are welcome, especially regarding their potential applications. Undoubtedly, with increased research, new, important knowledge on thermophages will be gained, and this Special Issue will help in the effective dissemination of this expanded information and an increased understanding the biology of these viruses.

Prof. Dr. Piotr Skowron
Prof. Dr. Alicja Wegrzyn
Guest Editors

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Keywords

  • bacteriophages
  • thermophilic bacteria
  • Bacillus group
  • phage therapy
  • host specificity
  • genome sequencing
  • viral ecology
  • molecular biology
  • biotechnology
  • microbial diversity

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Published Papers (1 paper)

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9 pages, 1380 KiB  
Protocol
A Method for Rapid Polyethyleneimine-Based Purification of Bacteriophage-Expressed Proteins from Diluted Crude Lysates, Exemplified by Thermostable TP-84 Depolymerase
by Beata Łubkowska, Edyta Czajkowska, Ireneusz Sobolewski, Natalia Krawczun, Agnieszka Żylicz-Stachula and Piotr M. Skowron
Microorganisms 2023, 11(9), 2340; https://doi.org/10.3390/microorganisms11092340 - 19 Sep 2023
Viewed by 1991
Abstract
Purification of bacteriophage-expressed proteins poses methodological difficulties associated with the need to process entire culture medium volume upon bacteriophage-induced bacterial cell lysis. We have used novel capsule glycosylase-depolymerase (TP84_26 GD) from bacteriophage TP-84, infecting thermophilic Geobacillus stearothermophilus bacteria, as a representative enzyme to [...] Read more.
Purification of bacteriophage-expressed proteins poses methodological difficulties associated with the need to process entire culture medium volume upon bacteriophage-induced bacterial cell lysis. We have used novel capsule glycosylase-depolymerase (TP84_26 GD) from bacteriophage TP-84, infecting thermophilic Geobacillus stearothermophilus bacteria, as a representative enzyme to develop a method for rapid concentration and purification of the enzyme present in diluted crude host cell lysate. A novel variant of the polyethyleneimine (PEI)-based purification method was devised that offers a fast and effective approach for handling PEI-facilitated purification of bacteriophage-expressed native proteins. Due to the very basic nature of PEI, the method is suitable for proteins interacting with nucleic acids or acidic proteins, where either mixed PEI-DNA or RNA–protein complexes or PEI–acidic protein complexes are reversibly precipitated. (i) The method is of general use, applicable with minor modifications to a variety of bacteriophage cell lysates and proteins. (ii) In the example application, TP84_26 GD was highly purified (over 50%) in a single PEI step; subsequent chromatography yielded a homogeneous enzyme. (iii) The enzyme’s properties were examined, revealing the presence of three distinct forms of the TP84_26 GD. These forms included soluble, unbound proteins found in host cell lysate, as well as an integrated form within the TP-84 virion. Full article
(This article belongs to the Special Issue Bacteriophages of Thermophilic Bacteria)
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