A novel tRNA variable number tandem repeat at human chromosome 1q23.3 is implicated as a boundary element based on conservation of a CTCF motif in mouse.
A novel tRNA variable number tandem repeat at human chromosome 1q23.3 is implicated as a boundary element based on conservation of a CTCF motif in mouse.
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DOI:
10.1093/nar/gku280
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发表时间:
2014-06
影响因子:
14.9
通讯作者:
Chadwick BP
中科院分区:
文献类型:
--
作者:
Darrow EM;Chadwick BP
The human genome contains numerous large tandem repeats, many of which remain poorly characterized. Here we report a novel transfer RNA (tRNA) tandem repeat on human chromosome 1q23.3 that shows extensive copy number variation with 9–43 repeat units per allele and displays evidence of meiotic and mitotic instability. Each repeat unit consists of a 7.3 kb GC-rich sequence that binds the insulator protein CTCF and bears the chromatin hallmarks of a bivalent domain in human embryonic stem cells. A tRNA containing tandem repeat composed of at least three 7.6-kb GC-rich repeat units reside within a syntenic region of mouse chromosome 1. However, DNA sequence analysis reveals that, with the exception of the tRNA genes that account for less than 6% of a repeat unit, the remaining 7.2 kb is not conserved with the notable exception of a 24 base pair sequence corresponding to the CTCF binding site, suggesting an important role for this protein at the locus.
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64.8
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作者:
de Koning AP;Gu W;Castoe TA;Batzer MA;Pollock DD
通讯作者:
Pollock DD
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Gartenberg, Marc R.
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通讯作者:
Pirrotta, V
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通讯作者:
Uhlmann, Frank