Difference between revisions of "PMID:108357"

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'''Balassa, G, Milhaud, P, Raulet, E, Silva, MT and Sousa, JC'''  (1979) A Bacillus subtilis mutant requiring dipicolinic acid for the development of heat-resistant spores. ''J. Gen. Microbiol.'' '''110''':365-79
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!align=left align='left' bgcolor='#CCCCFF' |Abstract
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A Bacillus subtilis mutant is described which forms heat-resistant spores only in the presence of external dipicolinic acid (DPA). The mutation, dpa-1, is localized in a new sporulation locus, linked to pyrA. The dpa-1 strain is unable to synthesize DPA but can incorporate external DPA. The amount of DPA incorporated, the frequency of heat-resistant spores and their degree of resistance are all dependent on the concentration of external DPA. Spores of dpa- 1 strains exhibit normal resistance to most chemicals, including octanol and chloroform, but not to ethanol, pyridine, phenol and trichloroacetic acid. Complete resistance to the latter group depends on DPA. DPA incorporation is slow and apparently requires an energy supply but not protein synthesis. Direct involvement of DPA in the heat-resistance of the spores is suggested. Thin sections of DPA-less spores exhibit clearly visible cytoplasmic membranes and ribosomes. These structures are absent or less visible in the core of spores obtained with added DPA.
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[http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=108357 PubMed]
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!align=left align='left' bgcolor='#CCCCFF' |Keywords
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Bacillus subtilis/genetics; Bacillus subtilis/physiology; Bacillus subtilis/ultrastructure; Chromosome Mapping; Drug Resistance, Microbial; Hot Temperature; Microscopy, Electron; Mutation; Picolinic Acids/metabolism; Spores, Bacterial/metabolism
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==Main Points of the Paper ==
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== Materials and Methods Used ==
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==Phenotype Annotations==
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==Notes==
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==References==
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[[Category:Publication]]

Latest revision as of 04:01, 18 January 2016

Citation

Balassa, G, Milhaud, P, Raulet, E, Silva, MT and Sousa, JC (1979) A Bacillus subtilis mutant requiring dipicolinic acid for the development of heat-resistant spores. J. Gen. Microbiol. 110:365-79

Abstract

A Bacillus subtilis mutant is described which forms heat-resistant spores only in the presence of external dipicolinic acid (DPA). The mutation, dpa-1, is localized in a new sporulation locus, linked to pyrA. The dpa-1 strain is unable to synthesize DPA but can incorporate external DPA. The amount of DPA incorporated, the frequency of heat-resistant spores and their degree of resistance are all dependent on the concentration of external DPA. Spores of dpa- 1 strains exhibit normal resistance to most chemicals, including octanol and chloroform, but not to ethanol, pyridine, phenol and trichloroacetic acid. Complete resistance to the latter group depends on DPA. DPA incorporation is slow and apparently requires an energy supply but not protein synthesis. Direct involvement of DPA in the heat-resistance of the spores is suggested. Thin sections of DPA-less spores exhibit clearly visible cytoplasmic membranes and ribosomes. These structures are absent or less visible in the core of spores obtained with added DPA.

Links

PubMed

Keywords

Bacillus subtilis/genetics; Bacillus subtilis/physiology; Bacillus subtilis/ultrastructure; Chromosome Mapping; Drug Resistance, Microbial; Hot Temperature; Microscopy, Electron; Mutation; Picolinic Acids/metabolism; Spores, Bacterial/metabolism

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Main Points of the Paper

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Materials and Methods Used

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Phenotype Annotations

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

References

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