Mammalian mitochondrial DNA replication intermediates are essentially duplex but contain extensive tracts of RNA/DNA hybrid.

Mammalian mitochondrial DNA replication intermediates are essentially duplex but contain extensive tracts of RNA/DNA hybrid.
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DOI:
10.1016/j.jmb.2010.02.029
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发表时间:
2010-04-16
影响因子:
5.6
通讯作者:
Holt IJ
Holt IJ
中科院分区:
生物学2区
文献类型:
--
作者:
Pohjoismäki JL;Holmes JB;Wood SR;Yang MY;Yasukawa T;Reyes A;Bailey LJ;Cluett TJ;Goffart S;Willcox S;Rigby RE;Jackson AP;Spelbrink JN;Griffith JD;Crouch RJ;Jacobs HT;Holt IJ

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我们证明,使用透射电子显微镜和免疫纯化与RNA/DNA杂交特异性抗体,完整的mtDNA复制中间体(mtRIs)基本上是双链体在其整个长度,但包含广泛的RNA束上的一条链。然而,RNA在这些分子中的保存程度高度依赖于所使用的制备方法。这些发现强烈支持链耦合模型的mtDNA复制涉及RNA掺入整个滞后链(RITOLS)。
We demonstrate, using transmission electron microscopy and immunopurification with an antibody specific for RNA/DNA hybrid, that intact mtDNA replication intermediates (mtRIs) are essentially duplex throughout their length, but contain extensive RNA tracts on one strand. However, the extent of preservation of RNA in such molecules is highly dependent on the preparative method used. These findings strongly support the strand-coupled model of mtDNA replication involving RNA incorporation throughout the lagging strand (RITOLS).
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