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Evolution of ribosomal DNA-derived satellite repeat in tomato genome

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dc.contributor.authorJo, Sung-Hwan-
dc.contributor.authorKoo, Dal-Hoe-
dc.contributor.authorKim, Jihyun F-
dc.contributor.authorHur, Cheol-Goo-
dc.contributor.authorLee, Sanghyeob-
dc.contributor.authorYang, Tae-jin-
dc.contributor.authorKwon, Suk-Yoon-
dc.contributor.authorChoi, Doil-
dc.date.accessioned2017-02-10T01:01:32Z-
dc.date.available2017-03-16T16:41:48Z-
dc.date.issued2009-04-08-
dc.identifier.citationBMC Plant Biology, 9(1):42ko_KR
dc.identifier.urihttps://hdl.handle.net/10371/100657-
dc.descriptionThis is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0),
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
ko_KR
dc.description.abstractAbstract

Background
Tandemly repeated DNA, also called as satellite DNA, is a common feature of eukaryotic genomes. Satellite repeats can expand and contract dramatically, which may cause genome size variation among genetically-related species. However, the origin and expansion mechanism are not clear yet and needed to be elucidated.


Results
FISH analysis revealed that the satellite repeat showing homology with intergenic spacer (IGS) of rDNA present in the tomato genome. By comparing the sequences representing distinct stages in the divergence of rDNA repeat with those of canonical rDNA arrays, the molecular mechanism of the evolution of satellite repeat is described. Comprehensive sequence analysis and phylogenetic analysis demonstrated that a long terminal repeat retrotransposon was interrupted into each copy of the 18S rDNA and polymerized by recombination rather than transposition via an RNA intermediate. The repeat was expanded through doubling the number of IGS into the 25S rRNA gene, and also greatly increasing the copy number of type I subrepeat in the IGS of 25-18S rDNA by segmental duplication. Homogenization to a single type of subrepeat in the satellite repeat was achieved as the result of amplifying copy number of the type I subrepeat but eliminating neighboring sequences including the type II subrepeat and rRNA coding sequence from the array. FISH analysis revealed that the satellite repeats are commonly present in closely-related Solanum species, but vary in their distribution and abundance among species.


Conclusion
These results represent that the dynamic satellite repeats were originated from intergenic spacer of rDNA unit in the tomato genome. This result could serve as an example towards understanding the initiation and the expansion of the satellite repeats in complex eukaryotic genome.
ko_KR
dc.language.isoenko_KR
dc.publisherBioMed Centralko_KR
dc.titleEvolution of ribosomal DNA-derived satellite repeat in tomato genomeko_KR
dc.typeArticleko_KR
dc.contributor.AlternativeAuthor조성환-
dc.contributor.AlternativeAuthor구달회-
dc.contributor.AlternativeAuthor김지현-
dc.contributor.AlternativeAuthor허철구-
dc.contributor.AlternativeAuthor이상협-
dc.contributor.AlternativeAuthor양태진-
dc.contributor.AlternativeAuthor권석윤-
dc.contributor.AlternativeAuthor최도일-
dc.identifier.doi10.1186/1471-2229-9-42-
dc.language.rfc3066en-
dc.rights.holderJo et al; licensee BioMed Central Ltd.-
dc.date.updated2017-01-06T10:23:02Z-
Appears in Collections:
College of Agriculture and Life Sciences (농업생명과학대학)Dept. of Plant Science (식물생산과학부)Journal Papers (저널논문_식물생산과학부)
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