Difference between revisions of "PMID:6450313"

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{|  id="C4f611b9d65266"  class=" tableEdit PMID_info_table" 
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!align=left  |Citation
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'''Lengeler, J'''  (1980) Characterisation of mutants of Escherichia coli K12, selected by resistance to streptozotocin.''Mol. Gen. Genet.'' '''179''':49-54
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!align=left  |Abstract
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From cultures of sensitive bacteria, treated with the antibiotic streptozotocin, two classes of resistant mutants can be isolated: 1) mutants, resistant under all the conditions tested to even the highest doses of the antibiotic. These are either pleiotropic-defective, pts-mutants, or more frequently, mutants lacking a transport system (enzyme IINag-complex of the PEP-dependent phosphotransferase system) encoded by the gene nagE. This gene is inducible by N-acetyl-glucosamine and seems to be part of the nag operon. The transport system in question is responsible for the uptake of N-acetyl-glucosamine, of D-glucosamine and of streptozotocin; 2) conditional resistant mutants which are unable to energize or to synthesize the streptozotocin transport system under certain growth conditions but do have the transport activity under other conditions. These include a) mutants auxotrophic for amino acids, vitamins, or nucleotides, b) mutants negative or sensitive to carbohydrates in the medium, and c) mutants wth defects in energy metabolism such as PEP synthesis.
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[http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=6450313 PubMed]
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!align=left  |Keywords
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Dose-Response Relationship, Drug; Drug Resistance, Microbial; Escherichia coli; Mutation; Phenotype; Streptozocin
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==Main Points of the Paper ==
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{{LitSignificance}}
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== Materials and Methods Used ==
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{{LitMaterials}}
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==Phenotype Annotations==
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==Notes==
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==References==
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[[Category:Publication]]

Revision as of 17:28, 14 March 2012

Citation

Lengeler, J (1980) Characterisation of mutants of Escherichia coli K12, selected by resistance to streptozotocin.Mol. Gen. Genet. 179:49-54

Abstract

From cultures of sensitive bacteria, treated with the antibiotic streptozotocin, two classes of resistant mutants can be isolated: 1) mutants, resistant under all the conditions tested to even the highest doses of the antibiotic. These are either pleiotropic-defective, pts-mutants, or more frequently, mutants lacking a transport system (enzyme IINag-complex of the PEP-dependent phosphotransferase system) encoded by the gene nagE. This gene is inducible by N-acetyl-glucosamine and seems to be part of the nag operon. The transport system in question is responsible for the uptake of N-acetyl-glucosamine, of D-glucosamine and of streptozotocin; 2) conditional resistant mutants which are unable to energize or to synthesize the streptozotocin transport system under certain growth conditions but do have the transport activity under other conditions. These include a) mutants auxotrophic for amino acids, vitamins, or nucleotides, b) mutants negative or sensitive to carbohydrates in the medium, and c) mutants wth defects in energy metabolism such as PEP synthesis.

Links

PubMed

Keywords

Dose-Response Relationship, Drug; Drug Resistance, Microbial; Escherichia coli; Mutation; Phenotype; Streptozocin

Main Points of the Paper

Please summarize the main points of the paper.

Materials and Methods Used

Please list the materials and methods used in this paper (strains, plasmids, antibodies, etc).

Phenotype Annotations

See Help:AnnotationTable for details on how to edit this table.
<protect>

Phenotype of Taxon Information Genotype Information (if known) Condition Information OMP ID OMP Term Name ECO ID ECO Term Name Notes Status

</protect>

Notes

References

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