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3. E. coli SeqA protein binds oriC in two different methyl-modulated reactions appropriate to its roles in DNA replication initiation and origin sequestration

Author

Slater, Steven, Wold, Sture, Lu, Min, Boye, Erik, Skarstad, Kirsten, and Kleckner, Nancy

Subjects
Proteins -- Physiological aspects, Chromosome replication -- Research, Escherichia coli -- Observations, Biological sciences
Abstract

The seqA gene of Escherichia coli controls both the initiation of replication and sequestration in the chromosome by direct interaction with the replication origin oriC. The binding of the protein SeqA to methylated oriC and hemimethylated DNA is strong and specific. SeqA also controls the binding of hemimethylated oriC to other membrane fragments. The initiation of replication is by methylation of oriC and sequestration takes place in the methylated structures formed by replication.

Published
1995

4. SeqA: a negative modulator of replication initiation in E. coli

Author

Lu, Min, Campbell, Joseph L., Boye, Erik, and Kleckner, Nancy

Subjects
Escherichia coli -- Genetic aspects, Chromosome replication -- Analysis, Biological sciences
Abstract

Replication in Escherichia coli starts at a genetically unusual origin, oriC. Multiple oriC copies are found in the rapidly growing cells and the initiation of replication of the origins occurs simultaneously. The sequestration process prevents the starting of a secondary replication and functions by acting on newly-replicated origins.

Published
1994

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