Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/06/20 11:24:42」(JST)

wiki en

Luteovirus is a genus of viruses, in the family Luteoviridae. There are currently eight species in this genus including the type species Barley yellow dwarf virus-PAV. Plants serve as natural hosts.^[1]^[2] The geographical distribution of Luteoviruses is widespread, with the virus primarily infecting plants via transmission by aphid vectors. The virus only replicates within the host cell and not within the vector [1]. The name 'luteovirus' arises from the Latin luteus, which is translated as 'yellow'. Luteovirus was given this name due to the symptomatic yellowing of the plant that occurs as a result of infection.

Taxonomy

Group: ssRNA(+)

Order: Unassigned

Family: Luteoviridae
- Genus: Luteovirus
  Barley yellow dwarf virus-kerII
  
  Barley yellow dwarf virus-kerIII
  
  Barley yellow dwarf virus-MAV
  
  Barley yellow dwarf virus-PAS
  
  Barley yellow dwarf virus-PAV
  
  Bean leafroll virus
  
  Rose spring dwarf-associated virus
  
  Soybean dwarf virus

^[2]

Morphology and genome structure

Viruses in Luteovirus are non-enveloped, with icosahedral and spherical geometries, and T=3 symmetry. The diameter is around 25-30 nm,^[1] with 32 capsomeres in each nucleocapsid. The nucleic acid content is around 28%.^[3] Luteovirus is a group IV virus according to the Baltimore classification of viruses. Each virion contains a single strand of (+) sense RNA. The genome is non-segmented, linear and between 5300 and 5900 nucleotides long. Notably, luteovirus has two 5' open reading frames (ORFs) which are located upstream of the coat protein. One such ORF encodes an RNA-dependent RNA polymerase. Several other ORFs are present at the 3' terminus and are expressed from subgenomic RNA. Luteovirus also lacks polyadenylation at the 3' terminus.^[3]

Genus	Structure	Symmetry	Capsid	Genomic Arrangement	Genomic Segmentation
Luteovirus	Icosahedral	T=3	Non-Enveloped	Linear	Monopartite

Life Cycle

Viral replication is cytoplasmic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription is the method of transcription. Translation takes place by leaky scanning, -1 ribosomal frameshifting, and suppression of termination.^[4] The virus exits the host cell by tubule-guided viral movement. Plants serve as the natural host. The virus is transmitted via a vector (insects). Transmission routes are vector and mechanical.^[1]

Genus	Host Details	Tissue Tropism	Entry Details	Release Details	Replication Site	Assembly Site	Transmission
Luteovirus	Plants	Phloem	Viral movement; mechanical inoculation	Viral movement	Cytoplasm	Cytoplasm	Mechanical inoculation: aphids

References

^ ^a ^b ^c "Viral Zone". ExPASy. Retrieved 15 June 2015.
^ ^a ^b ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015.
^ ^a ^b "Luteovirus". dpvweb.net. dpvweb.
^ Ali, M; Hameed, S; Tahir, M (October 2014). "Luteovirus: insights into pathogenicity.". Archives of virology 159 (11): 2853–60. PMID 25091739.

External links

http://link.springer.com/article/10.1007/s00705-014-2172-6
http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/39010000.htm
http://www.dpvweb.net/notes/showgenus.php?genus=Luteovirus
Viralzone: Luteovirus
ICTV

English Journal

Identification of a New Enamovirus Associated with Citrus Vein Enation Disease by Deep Sequencing of Small RNAs.

Vives MC, Velázquez K, Pina JA, Moreno P, Guerri J, Navarro L.AbstractABSTRACT To identify the causal agent of citrus vein enation disease, we examined by deep sequencing (Solexa-Illumina) the small RNA (sRNA) fraction from infected and healthy Etrog citron plants. Our results showed that virus-derived sRNAs (vsRNAs): (i) represent about 14.21% of the total sRNA population, (ii) are predominantly of 21 and 24 nucleotides with a biased distribution of their 5' nucleotide and with a clear prevalence of those of (+) polarity, and (iii) derive from all the viral genome, although a prominent hotspot is present at a 5'-proximal region. Contigs assembled from vsRNAs showed similarity with luteovirus sequences, particularly with Pea enation mosaic virus, the type member of the genus Enamovirus. The genomic RNA (gRNA) sequence of a new virus, provisionally named Citrus vein enation virus (CVEV), was completed and characterized. The CVEV gRNA was found to be single-stranded, positive-sense, with a size of 5,983 nucleotides and five open reading frames. Phylogenetic comparisons based on amino acid signatures of the RNA polymerase and the coat protein clearly classifies CVEV within the genus Enamovirus. Dot-blot hybridization and reverse transcription-polymerase chain reaction tests were developed to detect CVEV in plants affected by vein enation disease. CVEV detection by these methods has already been adopted for use in the Spanish citrus quarantine, sanitation, and certification programs.
Phytopathology.Phytopathology.2013 Oct;103(10):1077-86. doi: 10.1094/PHYTO-03-13-0068-R.
ABSTRACT To identify the causal agent of citrus vein enation disease, we examined by deep sequencing (Solexa-Illumina) the small RNA (sRNA) fraction from infected and healthy Etrog citron plants. Our results showed that virus-derived sRNAs (vsRNAs): (i) represent about 14.21% of the total sRNA popul
PMID 23718835

Cation-dependent folding of 3' cap-independent translation elements facilitates interaction of a 17-nucleotide conserved sequence with eIF4G.

Kraft JJ, Treder K, Peterson MS, Miller WA.SourceDepartment of Plant Pathology and Microbiology, Iowa State University, Ames, IA 50011, USA.
Nucleic acids research.Nucleic Acids Res.2013 Mar 1;41(5):3398-413. doi: 10.1093/nar/gkt026. Epub 2013 Jan 29.
The 3'-untranslated regions of many plant viral RNAs contain cap-independent translation elements (CITEs) that drive translation initiation at the 5'-end of the mRNA. The barley yellow dwarf virus-like CITE (BTE) stimulates translation by binding the eIF4G subunit of translation initiation factor eI
PMID 23361463

Coat protein based molecular characterization of Barley yellow dwarf virus isolates identified on oat plants in Pakistan.

Ali M, Tahir M, Hameed S, Ashraf M.AbstractKeywords: Luteovirus; oat; reverse transcription.
Acta virologica.Acta Virol.2013;57(3):383-5.
Keywords: Luteovirus; oat; reverse transcription.
PMID 24020768