Survey of extrachromosomal circular DNA derived from plant satellite repeats.

BMC Plant Biology
Alice NavrátilováJirí Macas

Abstract

Satellite repeats represent one of the most dynamic components of higher plant genomes, undergoing rapid evolutionary changes of their nucleotide sequences and abundance in a genome. However, the exact molecular mechanisms driving these changes and their eventual regulation are mostly unknown. It has been proposed that amplification and homogenization of satellite DNA could be facilitated by extrachromosomal circular DNA (eccDNA) molecules originated by recombination-based excision from satellite repeat arrays. While the models including eccDNA are attractive for their potential to explain rapid turnover of satellite DNA, the existence of satellite repeat-derived eccDNA has not yet been systematically studied in a wider range of plant genomes. We performed a survey of eccDNA corresponding to nine different families and three subfamilies of satellite repeats in ten species from various genera of higher plants (Arabidopsis, Oryza, Pisum, Secale, Triticum and Vicia). The repeats selected for this study differed in their monomer length, abundance, and chromosomal localization in individual species. Using two-dimensional agarose gel electrophoresis followed by Southern blotting, eccDNA molecules corresponding to all examined satelli...Continue Reading

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Citations

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Datasets Mentioned

BETA
DQ139394
EU568805
EU568818
DQ139381
DQ139383
DQ139368
EU568804
EU568806
EU568830
EU568835

Methods Mentioned

BETA
electrophoresis
PCR
whole genome
X-ray

Software Mentioned

dotter

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