Analyzing genomes with cumulative skew diagrams

A novel method of cumulative diagrams shows that the nucleotide composition of a microbial chromosome changes at two points separated by about a half of its length. These points coincide with sites of replication origin and terminus for all bacteria where such sites are known. The leading strand is...

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Bibliographic Details
Published inNucleic acids research Vol. 26; no. 10; pp. 2286 - 2290
Main Author Grigoriev, A
Format Journal Article
LanguageEnglish
Published England Oxford University Press 15.05.1998
Subjects
Bacteria - genetics
Base Composition
Chromosomes, Archaeal
Chromosomes, Bacterial
DNA Replication
DNA, Archaeal - chemistry
DNA, Bacterial - chemistry
Gene Rearrangement
Genome
Genome, Bacterial
Methanobacterium - genetics
Methanococcus - genetics
Space life sciences
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Summary:A novel method of cumulative diagrams shows that the nucleotide composition of a microbial chromosome changes at two points separated by about a half of its length. These points coincide with sites of replication origin and terminus for all bacteria where such sites are known. The leading strand is found to contain more guanine than cytosine residues. This fact is used to predict origin and terminus locations in other bacterial and archaeal genomes. Local changes, visible as diagram distortions, may represent recent genome rearrangements, as demonstrated for two strains of Escherichia coli. Analysis of the diagrams of viral and mitochondrial genomes suggests a link between the base composition bias and the time spent by DNA in a single stranded state during replication.
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ISSN:0305-1048
1362-4962
DOI:10.1093/nar/26.10.2286