Rymovirus: a cautionary tale.
Gibbs AJ, Gibbs MJ.
A recent proposal that the genus Rymovirus be assimilated into the genus Potyvirus is examined, discussed, and rejected. It illustrates the danger of using 'sequence identity' as a proxy for phylogenetic relatedness to distinguish closely related but distinct groups of viruses.
Arch Virol. 2018 Mar;163(3):815-817. doi: 10.1007/s00705-017-3676-7. Epub 2017 Dec 9. DOI: 10.1007/s00705-017-3676-7 PMID: 29224129
Recognition of six additional cystoviruses: Pseudomonas virus phi6 is no longer the sole species of the family Cystoviridae.
Mäntynen S, Sundberg LR, Poranen MM.
Cystoviridae is a family of bacterial viruses (bacteriophages) with a tri-segmented dsRNA genome. It includes a single genus Cystovirus, which has presently only one recognised virus species, Pseudomonas virus phi6. However, a large number of additional dsRNA phages have been isolated from various environmental samples, indicating that such viruses are more widespread and abundant than previously recognised. Six of the additional dsRNA phage isolates (Pseudomonas phages phi8, phi12, phi13, phi2954, phiNN and phiYY) have been fully sequenced. They all infect Pseudomonas species, primarily plant pathogenic Pseudomonas syringae strains. Due to the notable genetic and structural similarities with Pseudomonas phage phi6, we propose that these viruses should be included into the Cystovirus genus (and consequently into the Cystoviridae family). Here, we present an updated taxonomy of the family Cystoviridae and give a short overview of the properties of the type member phi6 as well as the putative new members of the family.
Arch Virol. 2018 Apr;163(4):1117-1124. doi: 10.1007/s00705-017-3679-4. Dec 19. DOI: 10.1007/s00705-017-3679-4. PMID: 29260329
Taxonomy of prokaryotic viruses: 2017 update from the ICTV Bacterial and Archaeal Viruses Subcommittee.
Adriaenssens EM, Wittmann J, Kuhn JH, Turner D, Sullivan MB, Dutilh BE, Jang HB, van Zyl LJ, Klumpp J, Lobocka M, Moreno Switt AI, Rumnieks J, Edwards RA, Uchiyama J, Alfenas-Zerbini P, Petty NK, Kropinski AM, Barylski J, Gillis A, Clokie MRC, Prangishvili D, Lavigne R, Aziz RK, Duffy S, Krupovic M, Poranen MM, Knezevic P, Enault F, Tong Y, Oksanen HM, Rodney Brister J.
Arch Virol. 2018 Apr;163(4):1125-1129. doi:10.1007/s00705-018-3723-z. PubMed PMID: 29356990.