A Database of Drosophila Genes & Genomes

FB2013_03, released May 7th, 2013
 

Dmel\Doc

General Information
Symbol Dmel\Doc Species D.melanogaster
Name Doc element FlyBase ID FBte0000341
Feature type natural transposable element
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Description
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FB2013_03
FB2013_02
All updates Click here to see a list of all updates to this record from FB2010_08 and on.
hide Sequences & Components
Complete element (bp)
to 5kb
 
Terminal repeat (bp)
Reference sequence transposon_sequence_set.embl.txt.gz
Component genes
 
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hide Sequence Ontology (SO)
Transposon type
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Copy number
and comments
40
 
55 in euchromatin of Release 3 genome annotation, of which 30 are full length.
Search for
Target Site Duplication
Size (bp)
6-13
 
hide Orthologs
Curated drosophilid orthologs
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The Doc element is transcribed as a full-length 5kb transcript which encodes two open reading frames (ORFs). Doc\gag (ORF1) encodes an RNA-binding protein and Doc\RTase (ORF2) encodes a reverse transcriptase. The RNA is localised on the Drosophila oocyte cytoskeleton.
F-element, I-element and Doc basal promoters share the same architecture and functional organisation.
Changes introduced in the promoter regions of distinct LINEs allows transcriptional activators to stimulate cryptic Inr modules. The response of different promoter constructs to the same enhancer is significantly influenced by the number, position and type of core elements present.
Correlations between the rate of transposition and TE copy number are determined for Doc and are found to be positive.
Doc elements are located in both euchromatin and heterochromatin.
One of a class of genes with TATA-less promoters that have the conserved DPE sequence.
Distinct cis-acting DNA elements, clustered in a 50bp long DNA region located at the 5' end of unit-length Doc copies, cooperate to control RNA initiation. Sequences located 200bp downstream from the 5' end inhibit expression in a position and orientation-dependent manner. Inhibition appears to be due to reduced translation rather that to impaired synthesis.
The distribution of transposable elements within heterochromatin indicates that they are major structural components of the heterochromatin.
Ectopic recombination can occur between two Doc elements.
The Doc retrotransposon has been found unstable in certain stocks.
Closely related to I-element, F-element, G-element and jockey element.
There is no sequence homology between the ends of the Doc element. Different Doc elements are conserved at the 3' end (which terminates with a polyadenylation signal followed by a stretch of oligo-A), but may be truncated at the 5' end, suggesting a mechanism of transposition via an RNA intermediate.
Doc elements lie at both break points of the Antp73b inversion; these elements lie in inverted orientation and the inversion probably resulted from recombination between them.
First described as an insertion in the BXC region on a chromosome carrying the Ubxbx-3 mutation, although it is not responsible for the mutant phenotype.
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Sequence Crossreferences
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hide Synonyms & Secondary IDs ( 11 )
Reported As
Symbol Synonym
Doc-element
EG:80H7.8
 
EG:121E7.1
 
Name Synonym
doc element
Doc element
Secondary FlyBase IDs
  • FBgn0000481
  • FBtp0011424
hide References ( 144 )
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hide Recent research papers ( 12 )
Mou et al., 2012, Proc. Natl. Acad. Sci. U.S.A. 109(8): 2949--2954
Control of target gene specificity during metamorphosis by the steroid response gene E93. [FBrf0217473]
Olivieri et al., 2012, Mol. Cell 47(6): 954--969
The Cochaperone Shutdown Defines a Group of Biogenesis Factors Essential for All piRNA Populations in Drosophila. [FBrf0219572]
Sienski et al., 2012, Cell 151(5): 964--980
Transcriptional silencing of transposons by piwi and maelstrom and its impact on chromatin state and gene expression. [FBrf0220033]
Sun et al., 2012, G3 (Bethesda) 2(5): 551--553
Simplified insertion of transgenes onto balancer chromosomes via Recombinase-Mediated Cassette Exchange. [FBrf0218264]
Handler et al., 2011, EMBO J. 30(19): 3977--3993
A systematic analysis of Drosophila TUDOR domain-containing proteins identifies Vreteno and the Tdrd12 family as essential primary piRNA pathway factors. [FBrf0216344]
Klenov et al., 2011, Proc. Natl. Acad. Sci. U.S.A. 108(46): 18760--18765
Separation of stem cell maintenance and transposon silencing functions of Piwi protein. [FBrf0216776]
Méndez-Lago et al., 2011, Mol. Biol. Evol. 28(7): 1967--1971
A Large Palindrome With Interchromosomal Gene Duplications in the Pericentromeric Region of the D. melanogaster Y Chromosome. [FBrf0214341]
Pane et al., 2011, EMBO J. 30(22): 4601--4615
The Cutoff protein regulates piRNA cluster expression and piRNA production in the Drosophila germline. [FBrf0217070]
Petrov et al., 2011, Mol. Biol. Evol. 28(5): 1633--1644
Population genomics of transposable elements in Drosophila melanogaster. [FBrf0214125]
Wang and Elgin, 2011, Proc. Natl. Acad. Sci. U.S.A. 108(52): 21164--21169
Drosophila Piwi functions downstream of piRNA production mediating a chromatin-based transposon silencing mechanism in female germ line. [FBrf0217081]
Yenerall et al., 2011, BMC Evol. Biol. 11: 364
Mechanisms of intron gain and loss in Drosophila. [FBrf0217682]
Zhang et al., 2011, Mol. Cell 44(4): 572--584
Heterotypic piRNA Ping-Pong Requires Qin, a Protein with Both E3 Ligase and Tudor Domains. [FBrf0216809]
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All reviews listed in FlyBase were published before 2011