PMID:1733927: Difference between revisions
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!align=left |Citation | |||
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'''Hwang, DS, Thöny, B and Kornberg, A''' (1992) IciA protein, a specific inhibitor of initiation of Escherichia coli chromosomal replication. ''J. Biol. Chem.'' '''267''':2209-13 | |||
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!align=left |Abstract | |||
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Specific binding of IciA protein to the 13-mers in the origin of a minichromosome (oriC) inhibits initiation of replication in vitro by blocking the opening of this region effected by the initiator DnaA protein (Hwang, D.S., and Kornberg, A. (1990) Cell 63, 325-331). Isolation of the iciA gene (Thöny, B., Hwang, D.S., Fradkin, L., and Kornberg, A. (1991) Proc. Natl. Acad. Sci. U.S.A. 88, 4066-4070) has made possible the construction of an IciA-overproducing strain, which in turn has simplified the isolation of a large quantity of the protein, indistinguishable from that of the wild-type strain. Based on sedimentation and gel filtration, the IciA protein is an elongated dimer of a 33.4-kDa subunit. The specific binding of IciA protein to the 13-mers was stable for 2 h at 30 degrees C. The amounts of IciA protein, detected by immunoassays, increased 4-fold compared with levels (about 100 dimers) in log-phase cells whereas levels of DnaA protein decreased upon entry of cells into the stationary phase. | |||
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!align=left |Links | |||
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[http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=1733927 PubMed] | |||
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| | !align=left |Keywords | ||
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|- | Bacterial Proteins/biosynthesis; Bacterial Proteins/genetics; Bacterial Proteins/metabolism; Base Sequence; Chromosomes, Bacterial; DNA Replication; DNA, Bacterial/biosynthesis; DNA-Binding Proteins/biosynthesis; DNA-Binding Proteins/genetics; DNA-Binding Proteins/metabolism; Electrophoresis, Polyacrylamide Gel; Escherichia coli/genetics; Escherichia coli Proteins; Molecular Sequence Data; Plasmids | ||
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==Significance {{HelpIcon|Help:Literature}} == | ==Significance {{HelpIcon|Help:Literature}} == | ||
{{LitSignificance}} | {{LitSignificance}} | ||
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==Annotations {{HelpIcon|Help:Literature}}== | ==Annotations {{HelpIcon|Help:Literature}}== | ||
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==EcoliWiki Links {{HelpIcon|Help:Literature}} == | ==EcoliWiki Links {{HelpIcon|Help:Literature}} == | ||
Latest revision as of 04:31, 15 September 2013
| Citation |
Hwang, DS, Thöny, B and Kornberg, A (1992) IciA protein, a specific inhibitor of initiation of Escherichia coli chromosomal replication. J. Biol. Chem. 267:2209-13 |
|---|---|
| Abstract |
Specific binding of IciA protein to the 13-mers in the origin of a minichromosome (oriC) inhibits initiation of replication in vitro by blocking the opening of this region effected by the initiator DnaA protein (Hwang, D.S., and Kornberg, A. (1990) Cell 63, 325-331). Isolation of the iciA gene (Thöny, B., Hwang, D.S., Fradkin, L., and Kornberg, A. (1991) Proc. Natl. Acad. Sci. U.S.A. 88, 4066-4070) has made possible the construction of an IciA-overproducing strain, which in turn has simplified the isolation of a large quantity of the protein, indistinguishable from that of the wild-type strain. Based on sedimentation and gel filtration, the IciA protein is an elongated dimer of a 33.4-kDa subunit. The specific binding of IciA protein to the 13-mers was stable for 2 h at 30 degrees C. The amounts of IciA protein, detected by immunoassays, increased 4-fold compared with levels (about 100 dimers) in log-phase cells whereas levels of DnaA protein decreased upon entry of cells into the stationary phase. |
| Links | |
| Keywords |
Bacterial Proteins/biosynthesis; Bacterial Proteins/genetics; Bacterial Proteins/metabolism; Base Sequence; Chromosomes, Bacterial; DNA Replication; DNA, Bacterial/biosynthesis; DNA-Binding Proteins/biosynthesis; DNA-Binding Proteins/genetics; DNA-Binding Proteins/metabolism; Electrophoresis, Polyacrylamide Gel; Escherichia coli/genetics; Escherichia coli Proteins; Molecular Sequence Data; Plasmids |
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