title: Transposition-driven genomic heterogeneity in the Drosophila brain.
abstract: Recent studies in mammals have documented the neural expression and mobility of retrotransposons and have suggested that neural genomes are diverse mosaics. We found that transposition occurs among memory-relevant neurons in the Drosophila brain. Cell type-specific gene expression profiling revealed that transposon expression is more abundant in mushroom body (MB) αβ neurons than in neighboring MB neurons. The Piwi-interacting RNA (piRNA) proteins Aubergine and Argonaute 3, known to suppress transposons in the fly germline, are expressed in the brain and appear less abundant in αβ MB neurons. Loss of piRNA proteins correlates with elevated transposon expression in the brain. Paired-end deep sequencing identified more than 200 de novo transposon insertions in αβ neurons, including insertions into memory-relevant loci. Our observations indicate that genomic heterogeneity is a conserved feature of the brain.
authors.affiliation: Department of Neurobiology, University of Massachusetts Medical School, Worcester, MA 01605, USA.
authors.forename: Paola N
authors.initials: PN
authors.lastname: Perrat
authors.forename: Shamik
authors.initials: S
authors.lastname: DasGupta
authors.forename: Jie
authors.initials: J
authors.lastname: Wang
authors.forename: William
authors.initials: W
authors.lastname: Theurkauf
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Weng
authors.forename: Michael
authors.initials: M
authors.lastname: Rosbash
authors.forename: Scott
authors.initials: S
authors.lastname: Waddell
mesh_terms: D000818:Animals; D060565:Argonaute Proteins / Q000378:metabolism; D001921:Brain / Q000166:cytology / Q000378:metabolism*; D029721:Drosophila Proteins / Q000378:metabolism; D004331:Drosophila melanogaster / Q000235:genetics*; D005786:Gene Expression Regulation; D049750:Genome, Insect / Q000235:genetics*; D024521:Mushroom Bodies / Q000166:cytology / Q000378:metabolism; D009474:Neurons / Q000378:metabolism; D010448:Peptide Initiation Factors / Q000378:metabolism; D034741:RNA, Small Interfering / Q000378:metabolism; D018626:Retroelements / Q000235:genetics*; D059467:Transcriptome
chemical_list: C518392:AGO3 protein, Drosophila; D060565:Argonaute Proteins; D029721:Drosophila Proteins; D010448:Peptide Initiation Factors; D034741:RNA, Small Interfering; D018626:Retroelements; C436124:aub protein, Drosophila
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