Publication detail

Guanine quadruplexes are formed by specific regions of human transposable elements

LEXA, M. ŠTEFLOVÁ, P. MARTÍNEK, T. VORLÍČKOVÁ, M. VYSKOT, B. KEJNOVSKÝ, E.

Original Title

Guanine quadruplexes are formed by specific regions of human transposable elements

Type

journal article in Web of Science

Language

English

Original Abstract

BACKGROUND:Transposable elements form a significant proportion of eukaryotic genomes. Recently, Lexa et al (Nucleic Acids Res 42:968-978, 2014) reported that plant long terminal repeat (LTR) retrotransposons often contain potential quadruplex sequences (PQSs) in their LTRs and experimentally confirmed their ability to adopt four-stranded DNA conformations.RESULTS:Here, we searched for PQSs in human retrotransposons and found that PQSs are specifically localized in the 3'-UTR of LINE-1 elements, in LTRs of HERV elements and are strongly accumulated in specific regions of SVA elements. Circular dichroism spectroscopy confirmed that most PQSs had adopted monomolecular or bimolecular guanine quadruplex structures. Evolutionarily young SVA elements contained more PQSs than older elements and their propensity to form quadruplex DNA was higher. Full-length L1 elements contained more PQSs than truncated elements; the highest proportion of PQSs was found inside transpositionally active L1 elements (PA2 and HS families).CONCLUSIONS:Conservation of quadruplexes at specific positions of transposable elements implies their importance in their life cycle. The increasing quadruplex presence in evolutionary young LINE-1 and SVA families makes these elements important contributors toward present genome-wide quadruplex distribution.

Keywords

G4 quadruplex; human transposable elements; circular dichroism; Bioconductor code; bioinformatics

Authors

LEXA, M.; ŠTEFLOVÁ, P.; MARTÍNEK, T.; VORLÍČKOVÁ, M.; VYSKOT, B.; KEJNOVSKÝ, E.

RIV year

2014

Released

27. 11. 2014

ISBN

1471-2164

Periodical

BMC GENOMICS

Year of study

15

Number

1032

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

12

Pages count

12

URL

http://www.biomedcentral.com/1471-2164/15/1032

BibTex

@article{BUT119812,
  author="Matej {Lexa} and Pavlína {Šteflová} and Tomáš {Martínek} and Michaela {Vorlíčková} and Boris {Vyskot} and Eduard {Kejnovský}",
  title="Guanine quadruplexes are formed by specific regions of human transposable elements",
  journal="BMC GENOMICS",
  year="2014",
  volume="15",
  number="1032",
  pages="1--12",
  doi="10.1186/1471-2164-15-1032",
  issn="1471-2164",
  url="http://www.biomedcentral.com/1471-2164/15/1032"
}