NDLI: The relationship between two tandem repeat families in rye heterochromatin

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The relationship between two tandem repeat families in rye heterochromatin

Content Provider	Springer Nature Link
Author	Evtushenko, E. V. Elisafenko, E. A. Vershinin, A. V.
Copyright Year	2010
Abstract	A bacterial artificial chromosome (BAC) library constructed from the short arm of rye (Secalecereale L.) chromosome 1R has been screened for clones containing copies of the pSc200 tandem repeat family, most abundant in rye subtelomeric heterochromatin. The molecular organization of the monomer array and adjacent sequences has been studied in BAC-126/C20. Digestion of the array with various restriction endonucleases reveals no higher-order organization. The DNA adjacent to the pSc200 array consists of different repeats, including retrotransposon derivatives and another tandemly repeated family, termed XbaI, with a monomer length of 576 bp, 475 of which show 82% similarity to the long terminal repeat of the known Cereba retrotransposon. Sequencing of the 13 kb long genomic region in BAC-126/C20 revealed a direct junction of the pSc200 and XbaI monomers. The arrays of both families terminate at the same AT-rich sequence CAAAAAT. Another recombination signal is the presence of palindromes in the close proximity to the junction site. The presence of microhomologies promotes the action of proteins involved in double-strand DNA break repair. To our knowledge, it is the first discovery of the direct junction of monomers that are longer than 100 bp and belong to different families of plant tandem repeats.
Starting Page	1
Ending Page	7
Page Count	7
File Format	PDF
ISSN	00268933
Journal	Molecular Biology
Volume Number	44
Issue Number	1
e-ISSN	16083245
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2010-03-04
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	tandemly organized repetitive DNA sequences BAC library retrotransposons subtelomeric heterochromatin molecular organization Human Genetics Biochemistry Life Sciences
Content Type	Text
Resource Type	Article
Subject	Structural Biology Biophysics

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