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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2016 ; 7
(ä): 10716
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A Helitron transposon reconstructed from bats reveals a novel mechanism of genome
shuffling in eukaryotes
#MMPMID26931494
Grabundzija I
; Messing SA
; Thomas J
; Cosby RL
; Bilic I
; Miskey C
; Gogol-Döring A
; Kapitonov V
; Diem T
; Dalda A
; Jurka J
; Pritham EJ
; Dyda F
; Izsvák Z
; Ivics Z
Nat Commun
2016[Mar]; 7
(ä): 10716
PMID26931494
show ga
Helitron transposons capture and mobilize gene fragments in eukaryotes, but
experimental evidence for their transposition is lacking in the absence of an
isolated active element. Here we reconstruct Helraiser, an ancient element from
the bat genome, and use this transposon as an experimental tool to unravel the
mechanism of Helitron transposition. A hairpin close to the 3'-end of the
transposon functions as a transposition terminator. However, the 3'-end can be
bypassed by the transposase, resulting in transduction of flanking sequences to
new genomic locations. Helraiser transposition generates covalently closed
circular intermediates, suggestive of a replicative transposition mechanism,
which provides a powerful means to disseminate captured transcriptional
regulatory signals across the genome. Indeed, we document the generation of novel
transcripts by Helitron promoter capture both experimentally and by transcriptome
analysis in bats. Our results provide mechanistic insight into Helitron
transposition, and its impact on diversification of gene function by genome
shuffling.