PMID:765765: Difference between revisions

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<span style = 'font-size: large'> '''Srivastava, BS'''  (1976) Radiation sensitivity of a mutant of Escherichia coli K-12 associated with DNA replication: evidence for a new repair function.''Mol. Gen. Genet.'' '''143''':327-32</span>
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!align=left  |Citation
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'''No author listed'''  (1976) Radiation sensitivity of a mutant of Escherichia coli K-12 associated with DNA replication: evidence for a new repair function. ''Mol. Gen. Genet.'' '''143''':327-32
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!align=left  |Abstract
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The isolation and properties of a new radiation sensitive mutant of Escherichia coli K-12 are described which shows a correlation between radiation sensitivity and replication of irradiated DNA. The mutation, called rer, is located between arg B and pur D loci. The mutant, when grown in tryptone broth after irradiation, is sensitive to UV and lambda-rays and incorporates little or no 3H-thymidine but in minimal glucose-salts medium both the radiation sensitivity and incorporation of 3H-thymidine remain identical to that of the parent strain. Studies with a temperature sensitive double mutant rer dnaC show that 1 hr incubation of irradiated cells at 42 degrees C before their transfer to 30 degrees C results in higher survival as compared to their incubation at 30 degrees C only. It is suggested that rer controls the replication of irradiated DNA and thus regulates the coordination between replication and repair of DNA.
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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=765765 PubMed]


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|{{TableHeadingColor}} |'''Abstract''' || The isolation and properties of a new radiation sensitive mutant of Escherichia coli K-12 are described which shows a correlation between radiation sensitivity and replication of irradiated DNA. The mutation, called rer, is located between arg B and pur D loci. The mutant, when grown in tryptone broth after irradiation, is sensitive to UV and lambda-rays and incorporates little or no 3H-thymidine but in minimal glucose-salts medium both the radiation sensitivity and incorporation of 3H-thymidine remain identical to that of the parent strain. Studies with a temperature sensitive double mutant rer dnaC show that 1 hr incubation of irradiated cells at 42 degrees C before their transfer to 30 degrees C results in higher survival as compared to their incubation at 30 degrees C only. It is suggested that rer controls the replication of irradiated DNA and thus regulates the coordination between replication and repair of DNA.
!align=left  |Keywords
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Coliphages/radiation effects; DNA Repair; DNA Replication; Escherichia coli/isolation & purification; Escherichia coli/radiation effects; Gamma Rays; Genetic Linkage; Mutation; Radiation Genetics; Ultraviolet Rays
|{{TableHeadingColor}} nowrap |'''Links''' ||  [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=765765 PubMed]
 
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==Significance {{HelpIcon|Help:Literature}} ==
==Significance {{HelpIcon|Help:Literature}} ==
{{LitSignificance}}
{{LitSignificance}}

Revision as of 19:37, 1 September 2013

Citation

No author listed (1976) Radiation sensitivity of a mutant of Escherichia coli K-12 associated with DNA replication: evidence for a new repair function. Mol. Gen. Genet. 143:327-32

Abstract

The isolation and properties of a new radiation sensitive mutant of Escherichia coli K-12 are described which shows a correlation between radiation sensitivity and replication of irradiated DNA. The mutation, called rer, is located between arg B and pur D loci. The mutant, when grown in tryptone broth after irradiation, is sensitive to UV and lambda-rays and incorporates little or no 3H-thymidine but in minimal glucose-salts medium both the radiation sensitivity and incorporation of 3H-thymidine remain identical to that of the parent strain. Studies with a temperature sensitive double mutant rer dnaC show that 1 hr incubation of irradiated cells at 42 degrees C before their transfer to 30 degrees C results in higher survival as compared to their incubation at 30 degrees C only. It is suggested that rer controls the replication of irradiated DNA and thus regulates the coordination between replication and repair of DNA.

Links

PubMed

Keywords

Coliphages/radiation effects; DNA Repair; DNA Replication; Escherichia coli/isolation & purification; Escherichia coli/radiation effects; Gamma Rays; Genetic Linkage; Mutation; Radiation Genetics; Ultraviolet Rays

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