Linked Life Data

7592383

Source:http://linkedlifedata.com/resource/pubmed/id/7592383

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
21
pubmed:dateCreated
1995-12-7
pubmed:abstractText
The possibility of there being a periplasm in Bacillus subtilis, in the distinct cell compartment bounded by the cytoplasmic membrane and the thick cell wall, has been investigated quantitatively and qualitatively. Cytoplasmic, membrane, and protoplast supernatant fractions were obtained from protoplasts which were prepared isotonically from cells grown under phosphate limitation. The contents of the protoplast supernatant fraction represent an operational definition of the periplasm. In addition, this cell fraction includes cell wall-bound proteins, exoproteins in transit, and contaminating cytoplasmic proteins arising through leakage from, or lysis of a fraction of, protoplasts. The latter, measured by assay of enzyme markers and by radiolabeled RNA and protein, was found to represent 7.6% of total cell protein, yielding a mean of 9.8% +/- 4.8% for B. subtilis 168 protein considered periplasmic. Qualitatively, after subjection of all cell fractions to polyacrylamide gel electrophoresis, RNase and DNase, zymographs revealed that (i) each cell fraction had a unique profile of nucleases and (ii) multiple species and a major fraction of both nucleases were concentrated in the periplasm. We conclude that the operationally defined periplasmic fraction corresponds closely, both quantitatively and qualitatively, to the contents of the periplasm of Escherichia coli. We discuss evidence that the maintenance of the components of this surface compartment in B. subtilis is compatible with the thick negatively charged cell wall acting as an external permeability barrier.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0021-9193
pubmed:author
pubmed:issnType
Print
pubmed:volume
177
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
6176-83
pubmed:dateRevised
2008-11-20
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
A periplasm in Bacillus subtilis.
pubmed:affiliation
Institut de Génétique et de Biologie Microbiennes, Lausanne, Switzerland.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't