Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 85 (2), 229-44

Diversification, Evolution and Methylation of Short Interspersed Nuclear Element Families in Sugar Beet and Related Amaranthaceae Species

Affiliations

Diversification, Evolution and Methylation of Short Interspersed Nuclear Element Families in Sugar Beet and Related Amaranthaceae Species

Katrin Schwichtenberg et al. Plant J.

Abstract

Short interspersed nuclear elements (SINEs) are non-autonomous non-long terminal repeat retrotransposons which are widely distributed in eukaryotic organisms. While SINEs have been intensively studied in animals, only limited information is available about plant SINEs. We analysed 22 SINE families from seven genomes of the Amaranthaceae family and identified 34 806 SINEs, including 19 549 full-length copies. With the focus on sugar beet (Beta vulgaris), we performed a comparative analysis of the diversity, genomic and chromosomal organization and the methylation of SINEs to provide a detailed insight into the evolution and age of Amaranthaceae SINEs. The lengths of consensus sequences of SINEs range from 113 nucleotides (nt) up to 224 nt. The SINEs show dispersed distribution on all chromosomes but were found with higher incidence in subterminal euchromatic chromosome regions. The methylation of SINEs is increased compared with their flanking regions, and the strongest effect is visible for cytosines in the CHH context, indicating an involvement of asymmetric methylation in the silencing of SINEs.

Keywords: Amaranthaceae; DNA methylation; non-long terminal repeat retrotransposon; short interspersed nuclear elements (SINEs); sugar beet.

Similar articles

See all similar articles

Cited by 4 articles

Publication types

MeSH terms

LinkOut - more resources

Feedback