New insights into helitron transposable elements in the mesopolyploid species Brassica rapa

Fu, Donghui, Wei, Lijuan, Xiao, Meili and Hayward, Alice (2013) New insights into helitron transposable elements in the mesopolyploid species Brassica rapa. Gene, 532 2: 236-245. doi:10.1016/j.gene.2013.09.033


Author Fu, Donghui
Wei, Lijuan
Xiao, Meili
Hayward, Alice
Title New insights into helitron transposable elements in the mesopolyploid species Brassica rapa
Formatted title
New insights into helitron transposable elements in the mesopolyploid species Brassica rapa
Journal name Gene   Check publisher's open access policy
ISSN 0378-1119
1879-0038
Publication date 2013-12
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.gene.2013.09.033
Open Access Status
Volume 532
Issue 2
Start page 236
End page 245
Total pages 10
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Collection year 2014
Language eng
Formatted abstract
Helitrons are DNA transposable elements that are widely present in the genomes of diverse eukaryotic taxa. Helitrons are distinct from other transposons in their ability to capture gene fragments and their rolling-replication mechanism. Brassica rapa is a mesopolyploid species and one of the most important vegetable and oil crops globally. A total of 787 helitrons were identified in the B. rapa genome and were assigned to 662 families and 700 subfamilies. More than 21,806 repetitive sequences were found within the helitrons, whose G+C content correlated negatively to that of the host helitron. Each helitron contained an average of 2.9 gene fragments and 1.9 intact genes, of which the majority were annotated with binding functions in metabolic processes. In addition, a set of 114 nonredundant microRNAs were detected within 174 helitrons and predicted to regulate a set of 787 nonredundant target genes. These results suggest that helitrons contribute to genomic structural and transcriptional variation by capturing gene fragments and generating microRNAs.
Keyword Brassica
Helitron
MicroRNA
Repetitive sequence
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2014 Collection
 
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