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Rad52-independent accumulation of joint circular minichromosomes during S phase in Saccharomyces cerevisiae.

Wellinger, Ralf Erik and Schär, Primo and Sogo, Jose M.. (2003) Rad52-independent accumulation of joint circular minichromosomes during S phase in Saccharomyces cerevisiae. Molecular and cellular biology, Vol. 23, H. 18. S. 6363-6372.

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Official URL: http://edoc.unibas.ch/dok/A5839357

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Abstract

We investigated the formation of X-shaped molecules consisting of joint circular minichromosomes (joint molecules) in Saccharomyces cerevisiae by two-dimensional neutral/neutral gel electrophoresis of psoralen-cross-linked DNA. The appearance of joint molecules was found to be replication dependent. The joint molecules had physical properties reminiscent of Holliday junctions or hemicatenanes, as monitored by strand displacement, branch migration, and nuclease digestion. Physical linkage of the joint molecules was detected along the entire length of the minichromosome and most likely involved newly replicated sister chromatids. Surprisingly, the formation of joint molecules was found to be independent of Rad52p as well as of other factors associated with a function in homologous recombination or in the resolution of stalled replication intermediates. These findings thus imply the existence of a nonrecombinational pathway(s) for the formation of joint molecules during the process of DNA replication or minichromosome segregation.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Division of Biochemistry and Genetics > Molecular Genetics (Schär)
UniBasel Contributors:Schär, Primo Leo
Item Type:Article, refereed
Bibsysno:Link to catalogue
Publisher:American Society for Microbiology
ISSN:1098-5549
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:24 May 2013 09:10
Deposited On:26 Apr 2013 06:57

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