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Keywords = defence systems of giant viruses

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15 pages, 674 KiB  
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Virophages, Satellite Viruses, Virophage Replication and Its Effects and Virophage Defence Mechanisms for Giant Virus Hosts and Giant Virus Defence Systems against Virophages
by Beata Tokarz-Deptuła, Sara Chrzanowska, Łukasz Baraniecki, Natalia Gurgacz, Michał Stosik, Jarosław Sobolewski and Wiesław Deptuła
Int. J. Mol. Sci. 2024, 25(11), 5878; https://doi.org/10.3390/ijms25115878 - 28 May 2024
Cited by 1 | Viewed by 2995
Abstract
In this paper, the characteristics of 40 so far described virophages—parasites of giant viruses—are given, and the similarities and differences between virophages and satellite viruses, which also, like virophages, require helper viruses for replication, are described. The replication of virophages taking place at [...] Read more.
In this paper, the characteristics of 40 so far described virophages—parasites of giant viruses—are given, and the similarities and differences between virophages and satellite viruses, which also, like virophages, require helper viruses for replication, are described. The replication of virophages taking place at a specific site—the viral particle factory of giant viruses—and its consequences are presented, and the defence mechanisms of virophages for giant virus hosts, as a protective action for giant virus hosts—protozoa and algae—are approximated. The defence systems of giant viruses against virophages were also presented, which are similar to the CRISPR/Cas defence system found in bacteria and in Archea. These facts, and related to the very specific biological features of virophages (specific site of replication, specific mechanisms of their defensive effects for giant virus hosts, defence systems in giant viruses against virophages), indicate that virophages, and their host giant viruses, are biological objects, forming a ‘novelty’ in biology. Full article
(This article belongs to the Collection Feature Papers in Molecular Microbiology)
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