Dsim\Helena

General Information
Symbol	Dsim\Helena	Species	D.simulans
Name	Helena	FlyBase ID	FBte0001085
Feature type	natural transposable element
Recent Updates
Description	What does this section display? This section contains items that were added to this record for each release. It currently only tracks new links between this FlyBase report and other FlyBase data classes (e.g. genes, references, stocks) or controlled vocabulary terms (e.g. GO, anatomy terms). What does this section not display? This section does not currently display links that were removed or gene model changes.
Update Feed	Click the icon below to subscribe to this FlyBase record and receive updates automatically through your feed reader.
FB2013_03
FB2013_02
All updates	Click here to see a list of all updates to this record from FB2010_08 and on.
Sequences & Components
Complete element (bp)
Terminal repeat (bp)
Reference sequence	transposon_sequence_set.embl.txt.gz
Component genes	Dsim\Helena\RTase
Sequence Accessions
	DDBJ/EMBL/GenBank AF012032 AF012033 AF012034 AF012035
Sequence Ontology (SO)
Transposon type	transposable_element (Petrov and Hartl, 1998, )
Insertions & Copy Number
Copy number and comments	TE copies retrieved from the CAF1 assembly (from AAA) of the mosaic assembly of genomes from different strains of D. simulans.:63 (Lerat et al., 2011)
Search for	All insertions of this transposon Insertions in the sequenced genome Insertions in other genomes
Target Site Duplication
Size (bp)
Orthologs
Curated drosophilid orthologs	Dvir\Helena
Comments
	The pattern of indel formation for Helena in the D.melanogaster and D.virilis groups is very similar, suggesting a high rate of DNA loss is common in Drosophila. (Petrov and Hartl, 1998)
Other Information
Etymology

External Crossreferences
Sequence Crossreferences
	DDBJ/EMBL/GenBank AF012032 AF012033 AF012034 AF012035
Other Crossreferences

Synonyms & Secondary IDs ( 3 )
Reported As
Symbol Synonym	Dsim\Helena helena (Lerat et al., 2011, Rebollo et al., 2008)
Name Synonym	Helena
Secondary FlyBase IDs
	FBgn0024780
References ( 9 )
Research paper	Lerat et al., 2011, Gene 473(2): 100--109 Comparative analysis of transposable elements in the melanogaster subgroup sequenced genomes. [FBrf0212990] Granzotto et al., 2009, BMC Evol. Biol. 9: 174 The evolutionary dynamics of the Helena retrotransposon revealed by sequenced Drosophila genomes. [FBrf0208563] Rebollo et al., 2008, BMC Genomics 9: 149 Losing helena: the extinction of a drosophila line-like element. [FBrf0205217] Vieira et al., 2002, Mol. Biol. Evol. 19(7): 1154--1161 Evolution of genome size in Drosophila. Is the invader's genome being invaded by transposable elements? [FBrf0149104] Vieira et al., 2000, Genet. Res. (Camb.) 76(1): 117--119 High copy numbers of multiple transposable element families in an Australian population of Drosophila simulans. [FBrf0130140] Petrov and Hartl, 1999, Proc. Natl. Acad. Sci. U.S.A. 96(4): 1475--1479 Patterns of nucleotide substitution in Drosophila and mammalian genomes. [FBrf0107092] Vieira et al., 1999, Mol. Biol. Evol. 16(9): 1251--1255 Wake up of transposable elements following Drosophila simulans worldwide colonization. [FBrf0111510] Petrov and Hartl, 1998, Mol. Biol. Evol. 15(3): 293--302 High rate of DNA loss in the Drosophila melanogaster and Drosophila virilis species groups. [FBrf0101983]
Review	Biemont et al., 1999, Genetica 107(1-3): 113--120 Transposable elements and genome evolution: the case of Drosophila simulans. [FBrf0129733]