Characterization of the Salmonella typhimurium phoE gene and development of Salmonella-specific DNA probes
In Escherichia coli K-12, the phoE gene, encoding a phosphate-limitation-inducible outer membrane pore protein (PhoE), is closely linked to the genes proA and proB. When the corresponding fragment of the Salmonella typhimurium chromosome was transferred to E. coli K-12 using an RP4::miniMu plasmid,...
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Published in | Gene Vol. 122; no. 1; pp. 45 - 52 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Lausanne
Elsevier B.V
01.12.1992
Amsterdam Elsevier New York, NY |
Subjects | |
Online Access | Get full text |
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Summary: | In
Escherichia coli K-12, the
phoE gene, encoding a phosphate-limitation-inducible outer membrane pore protein (PhoE), is closely linked to the genes
proA and
proB. When the corresponding fragment of the
Salmonella typhimurium chromosome was transferred to
E. coli K-12 using an RP4::miniMu plasmid, pULB113, no production of
S. typhimurium PhoE could be detected. Nevertheless, DNA hybridization studies revealed that the corresponding plasmid did contain
S. typhimurium phoE. Production of
S. typhimurium PhoE in
E. coli was detected only after subcloning the gene in a multicopy vector. Nucleotide (nt) sequence analysis showed extensive homology of
S. typhimurium phoE to the
E. coli gene and suggested possible explanations for the low expression of
S. typhimurium phoE in
E. coli. In addition, the sequence information was used to develop
Salmonella-specific DNA probes. Two oligodeoxyribonucleotides were synthesized based on nt sequences encoding the fifth and eighth cell-surface-exposed regions of PhoE. When used in polymerase chain reactions, these probes turned out to be specific i.e., no crossreactions occurred with the non-
Salmonella strains, whereas 132 out of 133 tested
Salmonella strains were recognized. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0378-1119 1879-0038 |
DOI: | 10.1016/0378-1119(92)90030-S |