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Mol Cell Biol
1986 Jan 01;61:218-26. doi: 10.1128/mcb.6.1.218-226.1986.
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Sequences from sea urchin TU transposons are conserved among multiple eucaryotic species, including humans.
Liebermann D
,
Hoffman-Liebermann B
,
Troutt AB
,
Kedes L
,
Cohen SN
.
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Sequences homologous to various structural domains of the Strongylocentrotus purpuratus TU family of transposons are present in sea urchin species closely related to S. purpuratus and were found in close proximity to each other in linkage patterns that differed for different species. Sequence homologs of the inverted repeat outer domain (IVR-OD) segment were, in addition, present in a sea urchin related only distantly to S. purpuratus and in all other eucaryotic organisms surveyed. In humans, a polymorphic hybridization pattern was seen for genomic DNA obtained from different individuals. Sequence comparisons revealed that repeated sequence motifs similar to those making up the 15-base-pair direct repeat unit of the IVR-OD domain of the TU elements exist in the IVRs of transposons identified in Drosophila melanogaster and maize and in the transcription control regions of certain eucaryotic viral and cellular genes. The remarkable evolutionary conservation of IVR-OD homologs may reflect a biological role for these sequences in DNA transposition, the regulation of gene expression, or both.
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