Previous Article | Next Article ![]()
Mol. Cell. Biol., Jun 1997, 3261-3271, Vol 17, No. 6
AM Merchant, Y Kawasaki, Y Chen, M Lei and BK Tye
We describe a new minichromosome maintenance factor, Mcm10, and show that
this essential protein is involved in the initiation of DNA replication in
Saccharomyces cerevisiae. The mcm10 mutant has an autonomously replicating
sequence-specific minichromosome maintenance defect and arrests at the
nonpermissive temperature with dumbbell morphology and 2C DNA content.
Mcm10 is a nuclear protein that physically interacts with several members
of the MCM2-7 family of DNA replication initiation factors. Cloning and
sequencing of the MCM10 gene show that it is identical to DNA43, a gene
identified independently for its putative role in replicating DNA.
Two-dimensional DNA gel analysis reveals that the mcm10-1 lesion causes a
dramatic reduction in DNA replication initiation at chromosomal origins,
including ORI1 and ORI121. Interestingly, the mcm10-1 lesion also causes
replication forks to pause during elongation through these same loci. This
novel phenotype suggests a unique role for the Mcm10 protein in the
initiation of DNA synthesis at replication origins.
Copyright © 1997, American Society for Microbiology
A lesion in the DNA replication initiation factor Mcm10 induces pausing of elongation forks through chromosomal replication origins in Saccharomyces cerevisiae
Section of Biochemistry, Molecular and Cell Biology, Cornell University, Ithaca, New York 14853-2703, USA.
This article has been cited by other articles:
Copyright © 2009 by the American Society for Microbiology. For an alternate route to Journals.ASM.org, visit: http://intl-journals.asm.org | More Info»