Document Type

Article

Publication Date

3-2010

Journal or Book Title

Journal of Molecular Evolution

Volume

70

Issue

3

First Page

275

Last Page

288

DOI

10.1007/s00239-010-9330-6

Abstract

Transposable elements (TEs) are mobile DNA regions that alter host genome structure and gene expression. A novel 588 bp non-autonomous high copy number TE in the Ostrinia nubilalis genome has features in common with miniature inverted-repeat transposable elements (MITEs): high A + T content (62.3%), lack of internal protein coding sequence, and secondary structure consisting of subterminal inverted repeats (SIRs). The O. nubilalis TE has inserted at (GAAA)n microsatellite loci, and was named the microsatellite-associated interspersed nuclear element ( MINE-1). Non-autonomous MINE-1 superfamily members also were identified downstream of (GAAA)n microsatellites within Bombyx mori and Pectinophora gossypiella genomes. Of 316 (GAAA)n microsatellites from the B. mori whole genome sequence, 201 (63.6%) have associated autonomous or non-autonomous MINE-1 elements. Autonomous B. mori MINE-1s a encode a helicase and endonuclease domain RepHel-like protein (BMHELp1) indicating their classification as Helitron-like transposons and were renamed Helitron1_BM. Transposition of MINE-1 members in Lepidoptera has resulted in the disruption of (GAAA)n microsatellite loci, has impacted the application of microsatellite-based genetic markers, and suggests genome sequence that flanks TT/AA dinucleotides may be required for target site recognition by RepHel endonuclease domains.

Comments

This article is from Journal of Molecular Evolution; 70 (2010); 275-288; doi: 10.1007/s00239-010-9330-6

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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