Linked Life Data

4897109

Source:http://linkedlifedata.com/resource/pubmed/id/4897109

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1969-10-21
pubmed:abstractText
In the Enterobacteriaceae, beta-glucosides are catabolized by a complex system formed of three permeases, with partly overlapping substrate specificities, and two hydrolytic enzymes, phospho-beta-glucosidase A and B, which hydrolyze only phosphorylated beta-glucosides. Some Enterobacteriaceae such as Klebsiella-Aerobacter (Enterobacter) possess the complete system; others possess only parts of it or may have a cryptic phospho-beta-glucosidase activity without permease activity. A screening test applied to strains belonging to several genera of Enterobacteriaceae showed that strains of Citrobacter, Hafnia, and Serratia exhibit a degree of similarity in phospho-beta-glucosidase activity and inducibility which could be useful in their taxonomic characterization; others, such as Aerobacter aerogenes, Erwinia, and Proteus vulgaris, are more heterologous. Owing to the presence of inducible phospho-beta-glucosidases A and B in Citrobacter, the fermentation of beta-methyl glucoside and the fermentation of arbutin in mixture with cellobiose could be of diagnostic value in the differentiation of Citrobacter from Salmonella. Wild-type strains of Escherichia coli, Shigella, and Salmonella are phenotypically similar in their inability to catabolize beta-glucosides, the presence of constitutive P-beta-glucosidase A, and the lack of beta-glucoside permeases I and II. Their beta-glucoside-fermenting mutants show, however, a phospho-beta-glucosidase and beta-glucoside permease activity which is characteristic for mutants from each genus. The differences in the phenotype of the mutants reflect probable differences in the presence of cryptic genes in the wild-type strains and could be of evolutionary significance.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-13670527, http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-13764402, http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-14224387, http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-14442392, http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-15436457, http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-4289962, http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-4869632, http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-4870648, http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-4897110, http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-4964402, http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-5242130, http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-5335892, http://linkedlifedata.com/resource/pubmed/commentcorrection/4897109-5335893
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0021-9193
pubmed:author
pubmed:issnType
Print
pubmed:volume
99
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
422-33
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
1969
pubmed:articleTitle
Taxonomic investigations on expressed and cryptic phospho-beta-glucosidases in Enterobacteriaceae.
pubmed:publicationType
Journal Article