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General Information
Symbol
S-element
Species
D. melanogaster
Feature type
natural_transposable_element
FlyBase ID
FBte0001005
Sequences and Components
Complete element (bp)

Approximately 1736 bp.

Terminal repeat (bp)

203

Component genes
Sequence Accessions
GenBank Nucleotide - A collection of sequences from several sources, including GenBank, RefSeq, TPA, and PDB.
Sequence Ontology (SO)
Insertions and Copy Number
Copy number and comments

51 in euchromatin of Release 3 genome annotation, of which 14 are full length.

Target Site Duplication
Orthologs
Curated drosophilid orthologs
Comments

Phylogenetic analysis reveals that the members of the S-element family of D. melanogaster can be grouped into at least two genetically differentiated clusters.

The S-element transposable elements form a diverse family of long-inverted repeat transposons, varying in size and sequence. The longest is 1736bp with 234bp inverted repeats. The 345-amino acid polypeptide is homologous to transposases of the Mariner-Tc1 superfamily. S-elements are ubiquitous in D.melanogaster and relatives are present in the two sibling species D.mauritiana and D.simulans, but are absent from 17 other species examined. There are on average 37.4 copies per diploid genome. They insert at an AT dinucleotide within a short palindrome and apparently duplicate the dinucleotide upon insertion.

Copies of the S-element are present within the chromocentre and euchromatic chromosome arms.

Other Information
Etymology
External Crossreferences and Linkouts ( 13 )
Crossreferences
GenBank Nucleotide - A collection of sequences from several sources, including GenBank, RefSeq, TPA, and PDB.
Synonyms and Secondary IDs (4)
References (49)