Element:Tv1

From The Gypsy Database

Description

Tv1 is a retrovirus described in Drosophila virilis (Andrianov and Shuppe 1994). Tv1 belongs to the genus Errantiviridae (Boeke et al. 1999; Pringle 1998; 1999; Hull 1999), a lineage of fly-retroviruses and LTR retrotransposons phylogenetically related to 412/mdg1 clade (Tubio, Naveira and Costas 2005). The genomic structure of Tv1 is 6.8Kb in size including LTRs of 453 nt. The internal region displays a Primer Binding Site (PBS) complementary to a tRNASer, three Open Reading Frames (ORFs) for gag, pol, and env genes, and a small epigenetic ORF between the integrase and env, and the Polypurine Tract (PPT) adjacent to the 3´LTR (Andrianov et al. 1999).

Structure

Tv1.png


Figure not to scale. If present, long terminal repeats (LTRs) have been highlighted in blue. Amino acid motifs noted with lines indicate the conserved residues in each protein domain, abbreviations below mean:

MA=matrix PR=protease DU or DUT=dUTPase TM=transmembrane TAV or IBMP=transactivator/viroplasmin or inclusion body matrix protein
CA=capsid RT=reverse transcriptase INT=Integrase CHR=chromodomain
NC=nucleocapsid RH=RNaseH SU=surface MOV=movement protein
PPT=polypurine tract PBS=primer binding site ATF=aphid transmission factor VAP=virion associated protein

Related literature

Genbank accession:AF056940
Clade:17.6
Cluster or genus:Errantiviridae
Branch or class:Branch 2
Family:Ty3/Gypsy
System:LTR retroelements
Host:
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Drosophila virilis.gif
Drosophila virilis
Image, courtesy of Thomas Kaufman, Flybase
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