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J Biol Chem, Vol. 275, Issue 11, 8190-8195, March 17, 2000
From the Department of Biology, University of Konstanz,
Universitätsstrasse 10, 78457 Konstanz, Federal Republic of Germany
Replication of chromosomal templates requires the
passage of the replication machinery through nucleosomally organized
DNA. To gain further insights into these processes we have used
chromatin that was reconstituted with dimethyl
suberimidate-cross-linked histone octamers as template in the SV40
in vitro replication system. By supercoiling analysis we
found that cross-linked histone octamers were reconstituted with the
same kinetic and efficiency as control octamers. Minichromosomes with
cross-linked nucleosomes were completely replicated, although the
efficiency of replication was lower compared with control chromatin.
Analysis of the chromatin structure of the replicated DNA revealed that
the cross-linked octamer is transferred to the daughter strands. Thus,
our data imply that histone octamer dissociation is not a prerequisite for the passage of the replication machinery and the transfer of the
parental nucleosomes.
Histone Octamer Dissociation Is Not Required for in
Vitro Replication of Simian Virus 40 Minichromosomes*
*
This work was supported by Grant Gr 1201/2-2 from the
Deutsche Forschungsgemeinschaft (to C. G.).The costs of publication of this
article were defrayed in part by the
payment of page charges. The article
must therefore be hereby marked
"advertisement" in accordance with 18 U.S.C. Section
1734 solely to indicate this fact.
To whom correspondence should be addressed. Tel.: 49 7531 882125;
Fax: 49 7531 884036; E-mail: Claudia.Gruss@uni-konstanz.de.
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