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General Information
D. melanogaster
Feature type
FlyBase ID
Sequences and Components
Complete element (bp)
Terminal repeat (bp)
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
Target Site Duplication
Size (bp)

"mini-me" elements from separate species show an overall lack of sequence identity but have a number of shared features. Perfect inverted repeats are conserved at both termini of the "mini-me" elements. At the 5' end, the inverted repeat is partially duplicated, forming a complementary palindrome. The 3' inverted repeat is located at a slightly preterminal position. A core 33bp motif that begins approximately 110bp from the 5' end of the element is also conserved, having approximately 80% sequence identity across all copies of the "mini-me" element analysed. A (TA)n-producing proto-microsatellite is present upstream of the 33bp core region and a (GTCY)n-producing proto-microsatellite is present downstream of the 33bp core region. The region between the (GTCY)n proto-microsatellite and the 3' subterminal inverted repeat is not conserved between species and can be extremely variable between copies of "mini-me" elements within a species. INE-1 elements account for approximately 1.2% of the D.melanogaster genome. INE-1 elements are 3 times more abundant on chromosome 4 as in the genome as a whole.

A repeated sequence mostly found on chromosome 4.

INE-1 has a suggested role in the heterochromatic nature of chromosome 4.

The "Dr. D" repetitive sequence (described in FBrf0048918) contains sequences of both INE-1 and 1360 transposable elements.

INE-1 elements are distributed throughout the banded region of chromosome 4, at the base of the major chromosome arms, at several telomeres and within the chromocentre.

Other Information
External Crossreferences and Linkouts ( 9 )
GenBank Nucleotide - A collection of sequences from several sources, including GenBank, RefSeq, TPA, and PDB.
Synonyms and Secondary IDs (24)
Reported As
Symbol Synonym
Interspersed element 1
Interspersed repeat element
microsatellite initiating mobile element
Secondary FlyBase IDs
  • FBgn0026556
  • FBgn0000126
  • FBgn0026416
  • FBtp0019255
References (63)