imported>Lcovelli at 12:32, 15 March 2010

2010-03-15T12:32:06Z

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{{Element
|genbank=[http://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?db=nucleotide&val=154354398 154354398]
|type=
|genus= Badnavirus
|subfamily= Class 2
|family= Caulimoviridae
|group= LTR retroelements
|description=''Bougainvillea'' is a genus of flowering plants native to South America that worldwide are became a popular ornamental plants in most areas with warm climates. In the species ''Bougainvillea spectabilis'' from Taiwan has been recently isolated the pararetrovirus ''Bougainvillea spectabilis chlorotic vein-banding virus'' (BsCVBV) ([http://www.ncbi.nlm.nih.gov/nuccore/154354398 Wang ''et al.'' 2007], unpublished) which molecular characteristic resemble to those of ''Badnavirus'' genus, ''Caulimoviridae'' family (''International Committee on the Taxonomy of Viruses'' -ICTV- [[Literature:100589|Fauquet ''et al''. 2005]]). According to [[Literature:100596|Llorens ''et al''. 2009]] this still unclassificated badnavirus is located within Class 2 of the [[Caulimoviridae|''Caulimoviridae'']] family.

BsCVBV has bacilliform particles that contain a circular dsDNA of about 8.7 Kb in size (8759 bp long) encoding for four Open reading frames (ORFs I, II, III, IV) ([http://www.ncbi.nlm.nih.gov/nuccore/154354398 Wang ''et al.'' 2007], unpublished). ORF I potentially encodes a 15.5 kDa protein showing sequence similarity to the ''Caulimoviridae'' virion associated proteins (VAPs) encoded by the corresponding ORFs I. The function of ORF II product (16.4 kDa) is still unknown even if a DNA-binding property has been hypothesized for the ORF II products of some badnaviruses ([[Literature:86820|Borah ''et al.'' 2009]]; [[Literature:100640|Jacquot ''et al.'' 1996]]). The 257.2 kDa polyprotein encoded by ORF III contains the typical ''Badnavirus'' cell-to-cell movement protein (MOV), viral coat protein (COAT), aspartic protease (PR), reverse transcriptase (RT) and RNase H (RH) domains. It includes a "RNA-binding" motif sequence "C-X-C-X2-C-X4-H-X4-C" and a second large cysteine-rich region "C-X2-C-X11-C-X2-C-X4-C-X2-C" (only observed in Badna- and Tungroviruses) located at the C-terminus of the COAT (gag)-like region and similar to those identified in the nucleocapsid domains of LTR retroelements ([[Literature:100596|Llorens ''et al''. 2009]]). ORF IV overlaps the end of ORF III as observed for ''Citrus yellow mosaic virus'' (CYMV)-ORF VI and ''Cacao swollen shoot virus'' (CSSV)-ORFY ([[Literature:100651|Huang and Hurtung 2001]]; [[Literature:100662|Hagen ''et al.'' 1993]]).
|structure=BsCVBV.png
|host=Bougainvillea spectabilis
|hostpic=Bougainvillea_spectabilis.jpg
|literature=
|picowner=[http://www.hear.org/starr/images/full/starr-030418-0059.jpg Courtesy of Forest & Kim Starr, Hawaiian Ecosystems at Risk project (HEAR)]
}}
[[Category:Element]]

Element:BsCVBV - Revision history

imported>Lcovelli at 12:32, 15 March 2010