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. 1988 Feb;170(2):547–551. doi: 10.1128/jb.170.2.547-551.1988

Characterization of a DNA uptake reaction through the nuclear membrane of isolated yeast nuclei.

E Tsuchiya 1, S Shakuto 1, T Miyakawa 1, S Fukui 1
PMCID: PMC210688  PMID: 2828313

Abstract

Isolated yeast nuclei were able to incorporate 3H-labeled pJDB219 DNA in vitro in the presence of ATP and Mg2+. The number of plasmid molecules incorporated into each nucleus was calculated to be 60 under the conditions we used. Enzyme-histochemical staining of the incorporated biotinylated pJDB219 with streptavidin-biotinylated-peroxidase complex indicated a uniform distribution of the incorporated plasmids within each nucleus. After intranuclear incorporation, substrate pJDB219 DNAs (open and closed circular forms) were changed to the linear form and were weakly digested over the longer incubation period (over 60 min). Facile release of the once-incorporated plasmid DNA was never observable; discharge of the incorporated [3H]pJDB219 during a 60-min incubation was less than 5%. The addition of adenylyl-imidodiphosphate, N,N'-dicyclohexylcarbodiimide (DCCD), or quercetin inhibited in vitro DNA uptake reaction. DCCD and quercetin inhibited the nuclear ATPase and apparent protein kinase, respectively; hence, the involvement of these enzymes in the nuclear DNA transport system was suggested.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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