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A nuclear gene of Saccharomyces cerevisiae needed for stable maintenance of plasmids.
Author(s) -
Yo Kikuchi,
Akio Tohe
Publication year - 1986
Publication title -
molecular and cellular biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.14
H-Index - 327
eISSN - 1067-8824
pISSN - 0270-7306
DOI - 10.1128/mcb.6.11.4053
Subject(s) - biology , plasmid , complementation , saccharomyces cerevisiae , autonomously replicating sequence , genetics , mutant , origin of replication , dna replication , gene , t dna binary system , minichromosome , minichromosome maintenance , microbiology and biotechnology , genome , recombinant dna , vector (molecular biology)
We have isolated host mutants of Saccharomyces cerevisiae in which the 2 microns plasmid is poorly maintained. All the mutants tested constituted one complementation group, which was designated map1 (maintenance of plasmid). Minichromosomes carrying a chromosomal replication origin and a centromere were affected in the mutants. Two types of hybrid plasmids generated in vivo and in vitro appeared to compensate for the mutations and had DNA regions containing multiple ARS (autonomously replicating sequence) or a set of 2 microns inverted repeat sequences. These results suggested that poor maintenance of plasmids was due to low levels of replication, probably at the initiation of replication.

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