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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

In vitro cell cycle arrest induced by using artificial DNA templates.

In cell extracts of Xenopus eggs which oscillate between S and M phases of the cell cycle, the onset of mitosis is blocked by the presence of incompletely replicated DNA. In this report, we show that several artificial DNA templates (M13 single-stranded DNA and double-stranded plasmid DNA) can trigger this feedback pathway, which inhibits mitosis. Single-stranded M13 DNA is much more effective than double-stranded plasmid DNA at inhibiting the onset of mitosis. Furthermore, we have shown that low levels of M13 single-stranded DNA and high levels of double-stranded plasmid DNA can elevate the tyrosine kinase activity responsible for phosphorylating p34cdc2, thereby inactivating maturation-promoting factor and inhibiting entry into mitosis. This constitutes a simplified system with which to study the signal transduction pathway from the DNA template to the tyrosine kinase responsible for inhibiting p34cdc2 activity.[1]


  1. In vitro cell cycle arrest induced by using artificial DNA templates. Kornbluth, S., Smythe, C., Newport, J.W. Mol. Cell. Biol. (1992) [Pubmed]
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