Dmel\3S18

General Information
Symbol	Dmel\3S18	Species	D.melanogaster
Name	3S18 element	FlyBase ID	FBte0000266
Feature type	natural transposable element	Created / Updated	2006-12-04/2006-12-04
Sequences & Components
Complete element (bp)	6126 (Kaminker et al., 2002) 6126 (Davis and Judd, 1995) 6126 (FBrf0081893)
Terminal repeat (bp)	361 (Davis and Judd, 1995) 361 (FBrf0081893)
Reference sequence	transposon_sequence_set.embl.txt.gz
Component genes	3S18\ORF
Sequence Accessions
	DDBJ/EMBL/GenBank Z83532 Z50268 U23420 BI633144 AY183921 AY119280
Sequence Ontology (SO)
Transposon type	LTR_retrotransposon (Kaminker et al., 2002, ) transposable_element (Kaminker et al., 2002, )
Insertions & Copy Number
Copy number and comments	6 in euchromatin of Release 3 genome annotation, of which 4 are full length. (Kaminker et al., 2002) Approximately 15-25 (Davis and Judd, 1995) Approximately 25 (Rabinow and Birchler, 1989) Approximately 15 (FBrf0043377) or approximately 25 (FBrf0040134)
Search for	All insertions of this transposon Insertions in the sequenced genome Insertions in other genomes
Target Site Duplication
Size (bp)	5 (FBrf0041384)
Orthologs
Curated drosophilid orthologs	Dper\3S18 Dpsb\3S18 Dmir\3S18 Dsim\3S18 (Vieira et al., 1999) Dpse\3S18
Comments
	The spatial and temporal expression patterns of fifteen families of retrotransposons are analysed during embryogenesis and are found to be conserved. Results suggest that all families carry cis-acting elements that control their spatial and temporal expression patterns. (Ding and Lipshitz, 1994) Progeny derived from w^a/w^a4 heterozygotes demonstrate that ectopic recombination between paired 3S18 elements produces duplications and deficiencies. (Lim and Simmons, 1994) Sequences homologous to 3S18 are present about 25 times in the Drosophila genome. (Goldberg et al., 1983) A retroviral-like transposable element. Described as an insertion associated with the w^a4 mutation by Goldberg et al. (FBrf0040134) (as BEL), and as an insertion within the non-transcribed spacer of an rDNA repeat by Bell et al. (FBrf0043377) and Fabijanski and Pellegrini (FBrf0038558). In situ hybridization experiments indicate that 3S18 elements are located at about twenty-five sites throughout the genome and that their distribution differs from one strain to another. The ends of this element hybridize to each other.
Other Information
Etymology

External Crossreferences
Sequence Crossreferences
	DDBJ/EMBL/GenBank Z83532 Z50268 U23420 BI633144 AY183921 AY119280
Other Crossreferences

Synonyms & Secondary IDs ( 8 )
Reported As
Symbol Synonym	3S18 (Brennecke et al., 2007) BcDNA:SD27140 Bel (Kapitonov and Jurka, 2003, Sun, 2002.10.20, Sun et al., 2003, Rizzon et al., 2002) BEL (Saito et al., 2006, Abe et al., 2001, Gunawardane et al., 2007) Belshazar/3S18 (Sun et al., 2003) Motu 4 (Sun et al., 2003)
Name Synonym	3S18 element BEL element
Secondary FlyBase IDs
	FBgn0062843 FBgn0000172 FBgn0005384 FBtp0011408
References ( 37 )

Generate a list of	All references relating to this natural transposable element ( 37 )

List References by type	Research paper ( 30 ) Supplementary material ( 1 ) Review ( 2 ) FlyBase analysis ( 2 ) DNA/RNA sequence record ( 1 ) Computer file ( 1 )
Recent research papers ( 2 )
	Brennecke et al., 2007, Cell 128(6): 1089--1103 Discrete small RNA-generating loci as master regulators of transposon activity in Drosophila. [FBrf0200494] Saito et al., 2006, Genes Dev. 20(16): 2214--2222 Specific association of Piwi with rasiRNAs derived from retrotransposon and heterochromatic regions in the Drosophila genome. [FBrf0191820] Show all research papers ...
Recent reviews (0)
	All reviews listed in FlyBase were published before 2006 Show reviews ...