|Feature type||natural transposable element|
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|Sequences & Components|
|Complete element (bp)|
|Terminal repeat (bp)|
|Sequence Ontology (SO)|
|Insertions & Copy Number|
|Target Site Duplication|
|Curated drosophilid orthologs|
A phylogenetic survey has identified four major P-element subfamilies in the saltans and willistoni species groups of Drosophila.
PCR screening for O-type P elements in the relatives of D.bifasciata reveal that they only occur in the sibling species D.imaii. An extremely close relative appears in S.pallida, from where horizontal transmission into D.bifasciata/D.imaii probably occurred.
P-element sequences from nine Dipteran species, including S.pallida, have been compared. The P-element phylogeny contradicts the phylogeny of the species, suggesting that horizontal transfer of P-elements may have occurred.
A number of Spal\P-elements have been cloned and sequenced from four independent stocks of S.pallida. These stocks each contain approximately 15 Spal\P-elements, including 3 to 4 full-length elements as well as shorter, deleted elements. All elements are divergent from one another, and appear to be immobile (since they are located at identical positions within the genome of independent stocks). This suggests that Spal\P-elements are old components of the S.pallida genome. Spal\P-elements are usually associated with repeated sequences, and are usually located in pericentromeric heterochromatin.
Spal\P-elements have been cloned and sequenced. The Spal\P-element is approximately 3kb long, has 31bp terminal inverted repeats and is flanked by an 8bp target site duplication.
|Synonyms & Secondary IDs ( 2 )|
|Secondary FlyBase IDs|
|References ( 21 )|
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|Recent research papers (0)|
|All research papers listed in FlyBase were published before 2011|
|Recent reviews (0)|
|All reviews listed in FlyBase were published before 2011|