A Temperate Sinorhizobium Phage, AP-16-3, Closely Related to Phage 16-3: Mosaic Genome and Prophage Analysis.

Autor: Kozlova AP; Laboratory of Genetics and Selection of Microorganisms, Federal State Budget Scientific Institution All-Russia Research Institute for Agricultural Microbiology (FSBSI ARRIAM), 196608 Saint Petersburg, Russia., Saksaganskaia AS; Laboratory of Genetics and Selection of Microorganisms, Federal State Budget Scientific Institution All-Russia Research Institute for Agricultural Microbiology (FSBSI ARRIAM), 196608 Saint Petersburg, Russia., Afonin AM; Laboratory of Genetics of Plant-Microbe Interactions, Federal State Budget Scientific Institution All-Russia Research Institute for Agricultural Microbiology (FSBSI ARRIAM), 196608 Saint Petersburg, Russia., Muntyan VS; Laboratory of Genetics and Selection of Microorganisms, Federal State Budget Scientific Institution All-Russia Research Institute for Agricultural Microbiology (FSBSI ARRIAM), 196608 Saint Petersburg, Russia., Vladimirova ME; Laboratory of Genetics and Selection of Microorganisms, Federal State Budget Scientific Institution All-Russia Research Institute for Agricultural Microbiology (FSBSI ARRIAM), 196608 Saint Petersburg, Russia., Dzyubenko EA; N. I. Vavilov Institute of Plant Genetic Resources (VIR), 190031 Saint Petersburg, Russia., Roumiantseva ML; Laboratory of Genetics and Selection of Microorganisms, Federal State Budget Scientific Institution All-Russia Research Institute for Agricultural Microbiology (FSBSI ARRIAM), 196608 Saint Petersburg, Russia.
Jazyk: angličtina
Zdroj: Viruses [Viruses] 2023 Aug 06; Vol. 15 (8). Date of Electronic Publication: 2023 Aug 06.
DOI: 10.3390/v15081701
Abstrakt: Soil Sinorhizobium phage AP-16-3, a strain phylogenetically close to Rhizobium phage 16-3, was isolated in a mountainous region of Dagestan, belonging to the origin of cultivated plants in the Caucasus, according to Vavilov N.I. The genome of phage AP-16-3 is 61 kbp in size and contains 62 ORFs, of which 42 ORFs have homologues in the genome of Rhizobium phage 16-3, which was studied in the 1960s-1980s. A search for Rhizobium phage 16-3-related sequences was performed in the genomes of modern strains of root nodule bacteria belonging to different species, genera, and families. A total of 43 prophages of interest were identified out of 437 prophages found in the genomes of 42 strains, of which 31 belonged to Sinorhizobium meliloti species. However, almost all of the mentioned prophages contained single ORFs, and only two prophages contained 51 and 39 ORFs homologous to phages related to 16-3. These prophages were detected in S. meliloti NV1.1.1 and Rh. leguminosarum OyaliB strains belonging to different genera; however, the similarity level of these two prophages did not exceed 14.7%. Analysis of the orphan genes in these prophages showed that they encoded predominantly virion structural elements, but also enzymes and an extensive group of hypothetical proteins belonging to the L, S, and E regions of viral genes of phage 16-3. The data obtained indicate that temperate phages related to 16-3 had high infectivity against nodule bacteria and participated in intragenomic recombination events involving other phages, and in horizontal gene transfer between rhizobia of different genera. According to the data obtained, it is assumed that the repetitive lysogenic cycle of temperate bacteriophages promotes the dissolution of the phage genetic material in the host bacterial genome, and radical updating of phage and host bacterial genomes takes place.
Databáze: MEDLINE
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