A family of plant viruses containing the largest single-stranded RNA genomes. Infections typically involve yellowing and necrosis, particularly affecting the phloem.
A genus of plant viruses in the family CLOSTEROVIRIDAE. Transmission is by whiteflies. Lettuce infectious yellows virus is the type species.
A genus of plant viruses in the family CLOSTEROVIRIDAE containing highly flexuous filaments. Some members are important pathogens of crop plants. Natural vectors include APHIDS, whiteflies, and mealybugs. The type species is Beet yellows virus.
The complete genetic complement contained in a DNA or RNA molecule in a virus.

Functional specialization and evolution of leader proteinases in the family Closteroviridae. (1/17)

Members of the Closteroviridae and Potyviridae families of the plant positive-strand RNA viruses encode one or two papain-like leader proteinases. In addition to a C-terminal proteolytic domain, each of these proteinases possesses a nonproteolytic N-terminal domain. We compared functions of the several leader proteinases using a gene swapping approach. The leader proteinase (L-Pro) of Beet yellows virus (BYV; a closterovirus) was replaced with L1 or L2 proteinases of Citrus tristeza virus (CTV; another closterovirus), P-Pro proteinase of Lettuce infectious yellows virus (LIYV; a crinivirus), and HC-Pro proteinase of Tobacco etch virus (a potyvirus). Each foreign proteinase efficiently processed the chimeric BYV polyprotein in vitro. However, only L1 and P-Pro, not L2 and HC-Pro, were able to rescue the amplification of the chimeric BYV variants. The combined expression of L1 and L2 resulted in an increased RNA accumulation compared to that of the parental BYV. Remarkably, this L1-L2 chimera exhibited reduced invasiveness and inability to move from cell to cell. Similar analyses of the BYV hybrids, in which only the papain-like domain of L-Pro was replaced with those derived from L1, L2, P-Pro, and HC-Pro, also revealed functional specialization of these domains. In subcellular-localization experiments, distinct patterns were observed for the leader proteinases of BYV, CTV, and LIYV. Taken together, these results demonstrated that, in addition to a common proteolytic activity, the leader proteinases of closteroviruses possess specialized functions in virus RNA amplification, virus invasion, and cell-to-cell movement. The phylogenetic analysis suggested that functionally distinct L1 and L2 of CTV originated by a gene duplication event.  (+info)

Effects of modification of the transcription initiation site context on citrus tristeza virus subgenomic RNA synthesis. (2/17)

Citrus tristeza virus (CTV), a member of the Closteroviridae, has a positive-sense RNA genome of about 20 kb organized into 12 open reading frames (ORFs). The last 10 ORFs are expressed through 3'-coterminal subgenomic RNAs (sgRNAs) regulated in both amounts and timing. Additionally, relatively large amounts of complementary sgRNAs are produced. We have been unable to determine whether these sgRNAs are produced by internal promotion from the full-length template minus strand or by transcription from the minus-stranded sgRNAs. Understanding the regulation of 10 sgRNAs is a conceptual challenge. In analyzing commonalities of a replicase complex in producing so many sgRNAs, we examined initiating nucleotides of the sgRNAs. We mapped the 5' termini of intermediate- (CP and p13) and low- (p18) produced sgRNAs that, like the two highly abundant sgRNAs (p20 and p23) previously mapped, all initiate with an adenylate. We then examined modifications of the initiation site, which has been shown to be useful in defining mechanisms of sgRNA synthesis. Surprisingly, mutation of the initiating nucleotide of the CTV sgRNAs did not prevent sgRNA accumulation. Based on our results, the CTV replication complex appears to initiate sgRNA synthesis with purines, preferably with adenylates, and is able to initiate synthesis using a nucleotide a few positions 5' or 3' of the native initiation nucleotide. Furthermore, the context of the initiation site appears to be a regulatory mechanism for levels of sgRNA production. These data do not support either of the established mechanisms for synthesis of sgRNAs, suggesting that CTV sgRNA production utilizes a different mechanism.  (+info)

Complete nucleotide sequence and genome organization of Grapevine leafroll-associated virus 3, type member of the genus Ampelovirus. (3/17)

This study reports on the complete genome sequence of Grapevine leafroll-associated virus 3, the type member of the genus Ampelovirus. The genome is 17 919 nt in size and contains 13 open reading frames (ORFs). Previously, the sequence of 13 154 nt of the 3'-terminal of the genome was reported. The newly sequenced portion contains a 158 nt 5' UTR, a single papain-like protease and a methyltransferase-like (MT) domain. ORF1a encodes a large polypeptide with a molecular mass of 245 kDa. With a predicted +1 frameshift, the large fusion protein generated from ORF1a/1b would produce a 306 kDa polypeptide. Phylogenetic analysis using MT domains further supports the creation of the genus Ampelovirus for mealy-bug-transmitted viruses in the family Closteroviridae.  (+info)

Genetic variability and population structure of Grapevine leafroll-associated virus 3 isolates. (4/17)

The genetic variability and population structure of a collection of 45 Grapevine leafroll-associated virus 3 (GLRaV-3) isolates were studied by single-stranded conformation polymorphism (SSCP) and sequence analysis of the RNA-dependent RNA polymerase (RdRp), heat-shock protein 70 homologue (HSP-70) and coat protein (CP) genes. The distribution of SSCP profiles was not correlated with the geographical origin of the isolates, indicating that GLRaV-3 is a single, undifferentiated population. The majority of the isolates showed an SSCP profile and a population structure that were composed of a single predominant variant. However, 10% of the isolates for the RdRp and HSP-70 genes and 15% for the CP gene were composed of a combination of two or more variants. Estimation of genetic diversity and phylogenetic analysis disclosed the possible existence of vines with mixed infections by diverging sequence variants, showing, in some cases, possible recombination events. Furthermore, differences in the genetic diversity and constraints existing in the three regions analysed indicated a higher variability in the CP gene. The epidemiological and biological implications of this finding are discussed.  (+info)

Transmission of grapevine leafroll-associated virus 3 by the vine mealybug (Planococcus ficus). (5/17)

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Genetic variability of natural populations of Grapevine leafroll-associated virus 2 in Pacific Northwest vineyards. (6/17)

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Mealybug transmission of Grapevine leafroll viruses: an analysis of virus-vector specificity. (7/17)

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3'-coterminal subgenomic RNAs and putative cis-acting elements of Grapevine leafroll-associated virus 3 reveals 'unique' features of gene expression strategy in the genus Ampelovirus. (8/17)

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"ICTV Report Closteroviridae". "Viral Zone". ExPASy. Retrieved 15 June 2015. ICTV Report: Closteroviridae Viralzone: ... Closteroviridae is a family of viruses. Plants serve as natural hosts. There are four genera and 59 species in this family, ... Closteroviridae (Articles with short description, Short description matches Wikidata, Use dmy dates from April 2017, Articles ... Closteroviridae". The Journal of General Virology. 101 (4): 364-365. doi:10.1099/jgv.0.001397. PMC 7414439. PMID 32134375. " ...
... , also known as beet yellows viral group, is a genus of viruses, in the family Closteroviridae. Plants serve as ... "ICTV Report Closteroviridae". "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021 ... ICTV Report: Closteroviridea Viralzone: Closterovirus "Genus: Closterovirus - Closteroviridae' - Positive-sense RNA Viruses". ... Closteroviridae, Viral plant pathogens and diseases, Virus genera). ...
... is a genus of viruses, in the family Closteroviridae. Plants serve as natural hosts. There are eight species in ... ICTV Report: Closteroviridae Viralzone: Velarivirus (Articles with short description, Short description matches Wikidata, Use ... "ICTV Report Closteroviridae". "Viral Zone". ExPASy. Retrieved 13 August 2015. "Virus Taxonomy: 2020 Release". International ... dmy dates from April 2017, Articles with 'species' microformats, Closteroviridae, Virus genera). ...
... is a genus of viruses, in the family Closteroviridae. Plants serve as natural hosts. There are 13 species in this ... ICTV Report: Closteroviridae Viralzone: Ampelovirus (Articles with short description, Short description matches Wikidata, Use ... "ICTV Report Closteroviridae". "Viral Zone". ExPASy. Retrieved 15 June 2015. "Virus Taxonomy: 2020 Release". International ... dmy dates from April 2017, Articles with 'species' microformats, Closteroviridae, Virus genera). ...
... is associated with two filamentous plant viruses of the family Closteroviridae, little cherry virus-1 ( ... "New genus Velarivirus in the family Closteroviridae and new species Cordyline Virus1 to be assigned to the new genus", G. P. ... "The family Closteroviridae revised". Archives of Virology. 147 (10): 2039-2044. doi:10.1007/s007050200048. PMID 12376765. S2CID ...
... pathogenic virus of the family Closteroviridae. WYLV virions are 1600-1850 nm in length and 10 nm in diameter. The virus, like ... Closteroviridae, Viral plant pathogens and diseases, All stub articles, Viral plant disease stubs). ...
... (BYV) is a plant pathogenic virus of the family Closteroviridae. Beet yellows virus is transmitted by ... Closteroviridae, All stub articles, Viral plant disease stubs). ...
The Potato yellow vein virus (PYVV) is a plant pathogen of the Closteroviridae family. It is a whitefly-transmitted ... Closteroviridae, Viral plant pathogens and diseases, All stub articles, Virus stubs). ...
... (CNFV) is a plant pathogenic virus of the family Closteroviridae. Family Groups - The Baltimore ... Closteroviridae, All stub articles, Viral plant disease stubs). ...
... (LIYV) is a plant pathogenic virus of the family Closteroviridae.[citation needed] ICTVdB-The ... Closteroviridae, Viral plant pathogens and diseases, All stub articles, Viral plant disease stubs). ...
... being a member of the closteroviridae virus family. Carrot yellow-leaf virus is a variant of beet yellow virus. Both pose ... however there is a general pattern in the family Closteroviridae that might apply to this particular virus. Closteroviruses are ... the Baltimore system and the International Committee of Taxonomy of Viruses system classifies this virus as closteroviridae, or ...
The following families are recognized: Bromoviridae Closteroviridae Endornaviridae Kitaviridae Mayoviridae Togaviridae ...
ICTV Report: Closteroviridae Viralzone: Crinivirus Rfam entry for 3'-terminal pseudoknot in SPCSV Rfam entry for 3'-terminal ... Crinivirus, formerly the lettuce infectious yellows virus group, is a genus of viruses, in the family Closteroviridae. They are ... "ICTV Report Closteroviridae". ICTVdB Management (2006). 00.017.0.02. Crinivirus. In: ICTVdB-The Universal Virus Database, ... Closteroviridae, Viral plant pathogens and diseases, Virus genera). ...
... (GLRaV-3) is a grapevine infecting virus in the family Closteroviridae, genus Ampelovirus ... Closteroviridae, Viral grape diseases, All stub articles, Virus stubs). ...
doi:10.2478/v10014-008-0008-3. v t e (Articles with short description, Short description matches Wikidata, Closteroviridae, ...
Closteroviridae, Viral grape diseases, All stub articles, Virus stubs). ...
Closteroviridae, Viral grape diseases, All stub articles, Virus stubs). ...
Closteroviridae, Viral plant pathogens and diseases, Infraspecific virus taxa, All stub articles, Viral plant disease stubs). ...
... includes Norwalk virus Family Carmotetraviridae Family Closteroviridae Family Flaviviridae - includes Yellow fever virus, West ...
Closteroviridae, Viral plant pathogens and diseases, Rose diseases, All stub articles, Viral plant disease stubs). ...
Caliciviridae Carmotetraviridae Caulimoviridae Chaseviridae Chrysoviridae Chuviridae Circoviridae Clavaviridae Closteroviridae ...
During the 1980s Lettuce infectious yellow virus (LIYV; family Closteroviridae; genus Crinivirus) was a significant threat to ...
Closteroviridae University of Idaho, Moscow, ID USA [email protected] Mart Krupovic Evolution/computational biology Istitut ...
Closteroviridae Preferred Term Term UI T443644. Date04/19/2001. LexicalTag NON. ThesaurusID NLM (2002). ... Closteroviridae Preferred Concept UI. M0384553. Registry Number. txid69973. Related Numbers. txid1513308. Scope Note. A family ... Closteroviridae. Tree Number(s). B04.715.110. B04.820.578.313. Unique ID. D029381. RDF Unique Identifier. http://id.nlm.nih.gov ...
Closteroviridae B04.715.110.150 Closterovirus B04.715.110.175 Crinivirus B04.715.260 Flexiviridae B04.715.260.150 Carlavirus ... Closteroviridae B04.820.110.150 Closterovirus B04.820.110.175 Crinivirus B04.820.180 Cystoviridae B04.820.180.070 Bacteriophage ...
ToCV (family Closteroviridae, genus Crinivirus), with a bipartite (+)ssRNA genome, was the fourth most abundant virus among the ... family Closteroviridae, genus Closterovirus) and citrus dwarfing viroid (CDVd) (family Pospiviroidae, genus Apscaviroid) ...
Closteroviridae) such as the sweet potato chlorotic stunt virus (SPCSV) (Photo 1D). Like B. tabaci, symptoms of virus ...
Closteroviridae , Closterovirus , Aminoácidos/genética , Closteroviridae/genética , Closterovirus/genética , Codón de ... The genome sequence of a closterovirus (genus Closterovirus, family Closteroviridae), tentatively named Thesium chinense ... Keywords: Thesium chinense closterovirus 1; Closterovirus; Closteroviridae; Thesium chinense.. Asunto(s). ...
Closteroviridae - Preferred Concept UI. M0384553. Scope note. A family of plant viruses containing the largest single-stranded ...
Closteroviridae Preferred Term Term UI T443644. Date04/19/2001. LexicalTag NON. ThesaurusID NLM (2002). ... Closteroviridae Preferred Concept UI. M0384553. Registry Number. txid69973. Related Numbers. txid1513308. Scope Note. A family ... Closteroviridae. Tree Number(s). B04.715.110. B04.820.578.313. Unique ID. D029381. RDF Unique Identifier. http://id.nlm.nih.gov ...
Findings of significant congruence between phylogenies of hantaviruses and phylogenies of their rodent reservoirs have led to the theory that rodents, although infected by the virus, are not harmed by it because of long-standing hantavirus-rodent host coevolution,[18][19] although findings in 2008 led to new hypotheses regarding hantavirus evolution.[20][21] Various hantaviruses have been found to infect multiple rodent species, and cases of cross-species transmission (host switching) have been recorded.[22][23][24] Additionally, rates of substitution based on nucleotide sequence data reveal that hantavirus clades and rodent subfamilies may not have diverged at the same time.[21][25] Furthermore, as of 2007 hantaviruses have been found in multiple species of non-rodent shrews and moles.[21][26][27][28] Taking into account the inconsistencies in the theory of coevolution, it was proposed in 2009 that the patterns seen in hantaviruses in relation to their reservoirs could be attributed to ...
Closteroviridae UI - D029381 MN - B4.715.110 MN - B4.820.110 MS - A family of plant viruses containing the largest single- ... A genus of plant viruses in the family CLOSTEROVIRIDAE. Transmission is by whiteflies. Lettuce infectious yellows virus is the ...
Closteroviridae - Corticoviridae - Cystoviridae - Endornaviridae - Flaviviridae - Fuselloviridae - Geminiviridae - ...
Closteroviridae Closterovirus Clostridiales Clostridium Clostridium acetobutylicum Clostridium beijerinckii Clostridium ...
unclassified Closteroviridae Carnation yellow fleck virus NC_022978. complete. -. 15602 nt. 9 1 land plants. 12/04/2013. 08/13/ ...
Closteroviridae,/i, are largely inferred by sequence homology or analogy to similarly located ORFs in related viruses. This ... The roles of proteins encoded by members of the genus Ampelovirus, family Closteroviridae are largely inferred by sequence ... a) Genome organisation of beet yellows virus (BYV) from the genus Closterovirus, family Closteroviridae, with an illustration ... Martelli G.P. A Brief Historical Account of the Family Closteroviridae. In: Catara A.F., Bar-Joseph M., Licciardello G., ...
Closteroviridae - Preferred Concept UI. M0384553. Scope note. A family of plant viruses containing the largest single-stranded ...
Closteroviridae , Vitis , Closteroviridae/genética , Frutas , Doenças das Plantas , Folhas de Planta , Açúcares/metabolismo , ... Closteroviridae/genética , Frutas/fisiologia , Expressão Gênica , Doenças das Plantas/virologia , Folhas de Planta/virologia , ... They belong to three genera, all in the family Closteroviridae. For the sake of convenience, these viruses are named as ... Vitis/fisiologia , Vitis/virologia , Closteroviridae/patogenicidade , Frutas/virologia , Genoma Viral , RNA Viral/genética , ...
  • Main viruses transmitted are Begomoviruses (Geminiviridae: Begomovirus) in sweetpotato, tomato leaf curl viruses, and cassava and bean mosaic viruses, and viruses of the genera Crinivirus (Family: Closteroviridae) such as the sweet potato chlorotic stunt virus (SPCSV) (Photo 1D). (cipotato.org)
  • The roles of proteins encoded by members of the genus Ampelovirus , family Closteroviridae are largely inferred by sequence homology or analogy to similarly located ORFs in related viruses. (nih.gov)
  • The results of this study suggest that the virion assembly of a member of the genus Ampelovirus occurs in a similar but not identical manner to those of other genera in the family Closteroviridae . (nih.gov)