scholarly journals ICTV Virus Taxonomy Profile: Redondoviridae

2020 ◽  
Author(s):  
Arwa Abbas ◽  
Louis J. Taylor ◽  
Ronald G. Collman ◽  
Frederic D. Bushman ◽  
Keyword(s):  
Critical Illness ◽  
Causative Agent ◽  
Human Subjects ◽  
International Committee ◽  
Open Reading Frames ◽  
Metagenomic Sequencing ◽  
Virus Taxonomy ◽  
Single Stranded Dna ◽  
The Family ◽  
Reading Frames

Viruses in the family Redondoviridae have a circular genome of 3.0 kb with three open reading frames. The packaged genome is inferred to be single-stranded DNA by analogy to related viruses. Redondoviruses were discovered through metagenomic sequencing methods in samples from human subjects and are inferred to replicate in humans. Evidence of redondovirus infection is associated with periodontitis and critical illness, but redondoviruses have not been shown to be the causative agent of any diseases. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Redondoviridae, which is available at ictv.global/report/redondoviridae.

scholarly journals ICTV Virus Taxonomy Profile: Roniviridae

2020 ◽  
Author(s):  
Walker P. J. ◽  
Cowley J. A. ◽  
Dong X. ◽  
Huang J. ◽  
Moody N. ◽  
...  
Keyword(s):  
International Committee ◽  
Open Reading Frames ◽  
Virus Taxonomy ◽  
Highly Pathogenic ◽  
Ribosomal Frameshifting ◽  
Yellow Head Virus ◽  
The Family ◽  
Positive Sense ◽  
Membrane Spanning ◽  
Reading Frames

The family Roniviridae includes the genus Okavirus for three species of viruses with enveloped, rod-shaped virions. The monopartite, positive-sense ssRNA genome (26–27 kb) contains five canonical long open reading frames (ORFs). ORF1a encodes polyprotein pp1a containing proteinase domains. ORF1b is expressed as a large polyprotein pp1ab by ribosomal frameshifting from ORF1a and encodes replication enzymes. ORF2 encodes the nucleoprotein. ORF3 encodes two envelope glycoproteins. ORFX encodes a putative double membrane-spanning protein. Roniviruses infect shrimp but only yellow head virus is highly pathogenic. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Roniviridae, which is available at ictv.global/report/roniviridae.

scholarly journals ICTV Virus Taxonomy Profile: Plectroviridae

2021 ◽  
Vol 102 (5) ◽  
Author(s):  
Petar Knezevic ◽  
Evelien M. Adriaenssens ◽  
Keyword(s):  
Cell Wall ◽  
International Committee ◽  
Virus Taxonomy ◽  
Single Stranded Dna ◽  
Rolling Circle ◽  
Bacterial Surface ◽  
Link Type ◽  
Rigid Rods ◽  
The Family ◽  
Rolling Circle Mechanism

Members of the family Plectroviridae produce particles that are non-enveloped rigid rods (70–280×10–16 nm). The supercoiled, circular, single-stranded DNA genome of about 4.5–8.3 kb, encodes 4–13 proteins. Viruses of this family infect cell wall-less bacteria, adsorbing to the bacterial surface, replicating their DNA by a rolling-circle mechanism or transposition, and releasing progeny from cells by extrusion, without killing the host. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Plectroviridae which is available at ictv.global/report/plectroviridae.

Molecular characterization of a novel mycovirus isolated from Rhizoctonia solani AG-1 IA 9-11

2021 ◽  
Author(s):  
Yang Sun ◽  
Yan qiong Li ◽  
Wen han Dong ◽  
Ai li Sun ◽  
Ning wei Chen ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Rna Virus ◽  
Dsrna Virus ◽  
Open Reading Frames ◽  
The Family ◽  
Significant Amino Acid Sequence ◽  
Overlapping Open Reading Frames ◽  
Significant Amino Acid ◽  
Reading Frames

Abstract The complete genome of the dsRNA virus isolated from Rhizoctonia solani AG-1 IA 9–11 (designated as Rhizoctonia solani dsRNA virus 11, RsRV11 ) were determined. The RsRV11 genome was 9,555 bp in length, contained three conserved domains, SMC, PRK and RT-like super family, and encoded two non-overlapping open reading frames (ORFs). ORF1 potentially coded for a 204.12 kDa predicted protein, which shared low but significant amino acid sequence identities with the putative protein encoded by Rhizoctonia solani RNA virus HN008 (RsRV-HN008) ORF1. ORF2 potentially coded for a 132.41 kDa protein which contained the conserved motifs of the RNA-dependent RNA polymerase (RdRp). Phylogenetic analysis indicated that RsRV11 was clustered with RsRV-HN008 in a separate clade independent of other virus families. It implies that RsRV11, along with RsRV-HN008 possibly a new fungal virus taxa closed to the family Megabirnaviridae, and RsRV11 is a new member of mycoviruses.

scholarly journals Molecular Characterization and Geographic Distribution of a Mymonavirus in the Population of Botrytis cinerea

Viruses ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 432 ◽  
Author(s):  
Fangmin Hao ◽  
Mingde Wu ◽  
Guoqing Li
Keyword(s):  
Botrytis Cinerea ◽  
Sclerotinia Sclerotiorum ◽  
Cdna Sequence ◽  
Rna Virus ◽  
Open Reading Frames ◽  
Phytopathogenic Fungus ◽  
Rna Dependent Rna Polymerase ◽  
Rdrp Domain ◽  
The Family ◽  
Reading Frames

Here, we characterized a negative single-stranded (−ss)RNA mycovirus, Botrytis cinerea mymonavirus 1 (BcMyV1), isolated from the phytopathogenic fungus Botrytis cinerea. The genome of BcMyV1 is 7863 nt in length, possessing three open reading frames (ORF1–3). The ORF1 encodes a large polypeptide containing a conserved mononegaviral RNA-dependent RNA polymerase (RdRp) domain showing homology to the protein L of mymonaviruses, whereas the possible functions of the remaining two ORFs are still unknown. The internal cDNA sequence (10-7829) of BcMyV1 was 97.9% identical to the full-length cDNA sequence of Sclerotinia sclerotiorum negative stranded RNA virus 7 (SsNSRV7), a virus-like contig obtained from Sclerotinia sclerotiorum metatranscriptomes, indicating BcMyV1 should be a strain of SsNSRV7. Phylogenetic analysis based on RdRp domains showed that BcMyV1 was clustered with the viruses in the family Mymonaviridae, suggesting it is a member of Mymonaviridae. BcMyV1 may be widely distributed in regions where B. cinerea occurs in China and even over the world, although it infected only 0.8% of tested B. cinerea strains.

scholarly journals Genome Sequence of Grapevine Virus T, a Novel Foveavirus Infecting Grapevine

2017 ◽  
Vol 5 (37) ◽  
Author(s):  
Yeonhwa Jo ◽  
Myung-Kyu Song ◽  
Hoseong Choi ◽  
Jae-Seong Park ◽  
Jae-Wung Lee ◽  
...  
Keyword(s):  
Genome Sequence ◽  
Rna Virus ◽  
Open Reading Frames ◽  
Grapevine Virus ◽  
The Family ◽  
Putative Member ◽  
Reading Frames

ABSTRACT Here, we report the genome sequence of grapevine virus T (GVT), a novel single-stranded RNA virus identified from a transcriptome of grapevine. The genome of GVT is 8,701 nucleotides in length and encodes five open reading frames. GVT is a putative member of the genus Foveavirus in the family Betaflexiviridae.

scholarly journals First Report of a Mesonivirus and Its Derived Small RNAs in an Aphid Species Aphis citricidus (Hemiptera: Aphididae), Implying Viral Infection Activity

2020 ◽  
Vol 20 (2) ◽  
Author(s):  
Tengyu Chang ◽  
Mengmeng Guo ◽  
Wei Zhang ◽  
Jinzhi Niu ◽  
Jin-Jun Wang
Keyword(s):  
Viral Infection ◽  
Small Rnas ◽  
Rna Virus ◽  
Aphid Species ◽  
Open Reading Frames ◽  
First Report ◽  
The Family ◽  
Interfering Rna ◽  
Unassigned Genus ◽  
Reading Frames

Abstract We report a new positive-sense single-stranded RNA (ss RNA+) virus from the brown citrus aphid Aphis citricidus. The 20,300 nucleotide (nt)-long viral genome contains five open-reading frames and encodes six conserved domains (TM2, 3CLpro, TM3, RdRp, Zm, and HEL1). Phylogenetic analysis and amino acid sequence analysis revealed this virus might belong to an unassigned genus in the family Mesoniviridae. The presence of the virus was also confirmed in the field population. Importantly, analysis of the virus-derived small RNAs showed a 22-nt peak, implying that viral infection triggers the small interfering RNA pathway as antiviral immunity in aphids. This is the first report of a mesonivirus in invertebrates other than mosquitoes.

scholarly journals Genome Sequence of the Broad-Host-Range Pseudomonas Phage Φ-S1

2012 ◽  
Vol 86 (18) ◽  
pp. 10239-10239 ◽  
Author(s):  
Sanna Sillankorva ◽  
Andrew M. Kropinski ◽  
Joana Azeredo
Keyword(s):  
Host Range ◽  
Genome Sequence ◽  
Open Reading Frames ◽  
Broad Host Range ◽  
Content Type ◽  
Double Stranded Dna ◽  
The Family ◽  
Reading Frames

The broad-host-range lyticPseudomonasphage Φ-S1 possess a 40,192 bp double-stranded DNA (dsDNA) genome of 47 open reading frames (ORFs) and belongs to the familyPodoviridae, subfamilyAutographivirinae, genusT7likevirus.

scholarly journals A Novel P/V/C Gene in a New Member of theParamyxoviridae Family, Which Causes Lethal Infection in Humans, Horses, and Other Animals

1998 ◽  
Vol 72 (2) ◽  
pp. 1482-1490 ◽  
Author(s):  
Lin-Fa Wang ◽  
Wojtek P. Michalski ◽  
Meng Yu ◽  
L. Ian Pritchard ◽  
Gary Crameri ◽  
...  
Keyword(s):  
Basic Protein ◽  
Viral Proteins ◽  
Open Reading Frames ◽  
Sequence Comparisons ◽  
V Protein ◽  
Reading Frame ◽  
Lethal Infection ◽  
The Family ◽  
Low Levels ◽  
Reading Frames

ABSTRACT In 1994, a new member of the family Paramyxoviridaeisolated from fatal cases of respiratory disease in horses and humans was shown to be distantly related to morbilliviruses and provisionally called equine morbillivirus (K. Murray et al., Science 268:94–97, 1995). To facilitate characterization and classification, the virus was purified, viral proteins were identified, and the P/V/C gene was cloned and sequenced. The coding strategy of the gene is similar to that of Sendai and measles viruses, members of the Paramyxovirusand Morbillivirus genera, respectively, in the subfamilyParamyxovirinae. The P/V/C gene contains four open reading frames, three of which, P, C, and V, have Paramyxovirinaecounterparts. The P and C proteins are larger and smaller, respectively, than are cognate proteins in members of the subfamily, and the V protein is made as a result of a single G insertion during transcription. The P/V/C gene has two unique features. (i) A fourth open reading frame is located between those of the C and V proteins and potentially encodes a small basic protein similar to those found in some members of the Rhabdoviridae andFiloviridae families. (ii) There is also a long untranslated 3′ sequence, a feature common in Filoviridaemembers. Sequence comparisons confirm that although the virus is a member of the Paramyxovirinae subfamily, it displays only low levels of homology with paramyxoviruses and morbilliviruses and negligible homologies with rubulaviruses.

scholarly journals ICTV Virus Taxonomy Profile: Ovaliviridae

2020 ◽  
Author(s):  
Li Huang ◽  
Haina Wang ◽  
Keyword(s):  
Viral Genome ◽  
International Committee ◽  
Virus Taxonomy ◽  
Enveloped Viruses ◽  
Content Type ◽  
Link Type ◽  
The Family ◽  
Virus Progeny ◽  
Linear Dsdna ◽  
Infected Cells

Ovaliviridae is a family of enveloped viruses with a linear dsDNA genome. The virions are ellipsoidal, and contain a multi-layered spool-like capsid. The viral genome is presumably replicated through protein priming by a putative DNA polymerase encoded by the virus. Progeny virions are released through hexagonal openings resulting from the rupture of virus-associated pyramids formed on the surface of infected cells. The only known host is a hyperthermophilic archaeon of the genus Sulfolobus . This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Ovaliviridae, which is available at ictv.global/report/ovaliviridae.

scholarly journals Complete Genome Sequence of Macrobrachium rosenbergii Golda Virus (MrGV) from China

Animals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 27
Author(s):  
Fanzeng Meng ◽  
Yiting Wang ◽  
Guohao Wang ◽  
Tao Hu ◽  
La Xu ◽  
...  
Keyword(s):  
Nucleocapsid Protein ◽  
Genomic Sequence ◽  
Clinical Signs ◽  
Macrobrachium Rosenbergii ◽  
Open Reading Frames ◽  
Freshwater Prawn ◽  
Ribosomal Frameshift ◽  
Giant Freshwater Prawn ◽  
The Family ◽  
Reading Frames

In a meta-transcriptome study of the giant freshwater prawn Macrobrachium rosenbergii sampled in 2018 from a hatchery, we identified a variant of Macrobrachium rosenbergii golda virus (MrGV) in postlarvae without clinical signs. The virus belongs to the family Roniviridae, and the genome of this MrGV variant, Mr-18, consisted of 28,957 nucleotides, including 4 open reading frames (ORFs): (1) ORF1a, encoding a 3C-like protein (3CLP) (4933 aa); (2) ORF1b, encoding a replicase polyprotein (2877 aa); (3) ORF2, encoding a hypothetical nucleocapsid protein (125 aa); and (4) ORF3, encoding a glycoprotein (1503 aa). ORF1a overlaps with ORF1b with 40 nucleotides, where a −1 ribosomal frameshift with slippage sequence 5′-G14925GGUUUU14931-3′ produces the pp1ab polyprotein. The genomic sequence of Mr-18 shared 97.80% identity with MrGV LH1-2018 discovered in Bangladesh. The amino acid sequence identities between them were 99.30% (ORF1a), 99.60% (ORF1b), 100.00% (ORF2), and 99.80% (ORF3), respectively. Phylogenetic analysis of the RNA-dependent RNA polymerase (RdRp) proteins revealed that they clustered together and formed a separate cluster from the genus Okavirus. The finding of MrGV in China warrants further studies to determine its pathogenicity and prevalence within the region.

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