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Volumn 273, Issue 5279, 1996, Pages 1234-1236

Induction of gene expression in Escherichia coli after pilus-mediated adherence

Author keywords

[No Author keywords available]

Indexed keywords

IRON; MEMBRANE RECEPTOR; SIDEROPHORE; VIRULENCE FACTOR;

EID: 0000737074     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.273.5279.1234     Document Type: Article
Times cited : (155)

References (29)
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    • note
    • Attachment and RT-PCR procedures were as follows: DS17 or DS17-8 were grown at 37°C in LB broth overnight, and 1 ml of overnight culture was inoculated into 9 ml of fresh LB broth. Cultures were incubated for 3 hours more, and 0.5 ml of 10% glutaraldehyde-stabilized human group O RBCs or rabbit RBCs were added to the cultures. After 30 min to allow for attachment, cells were pelleted, and the pellets of bacteria and RBCs were lysed in 1 ml of TRIzol total RNA isolation reagent (Gibco BRL). Total RNA isolation was continued according to TRIzol instructions. Approximately 2 mg of total RNA harvested from each sample was reverse-transcribed and then used as templates for PCR with a nonspecific set of primers as described in (5). The PCR parameters were 94°C for 1 min, 42°C for 1 min, and 72°C for 1 min for a total of 40 cycles, followed by 10 min of elongation at 72°C.
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    • note
    • 4 or CDH dissolved in 3 ml of methanol. The DS17 or DS17-8 strains were grown in LB broth overnight at 37°C, and 1 ml of overnight culture of each was inoculated into 9 ml of fresh LB broth. Bacteria were grown for another 3 hours and then centrifuged. Nine milliliters of culture supernatant was removed, and the bacterial pellets were resuspended in the remaining 1 ml of culture media. The bacterial suspensions were added to the pre-coated petri dishes at 37°C for 30 min with gentle shaking (60 rpm). Bacteria were lysed on the plates with 5 ml of TRIzol solution, and total RNA was isolated as above. Specific airS primers are listed above. The pyruvate dehydrogenase primers were pdh-1 (5′-TTGCTCGAAACACGACACGCCCT-3′) and pdh-2 (5′-ACGGCAATCTGATACTGGAGTAC-3′). PCR products were resolved on 8% polyacrylamide gels.
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    • note
    • We thank M. Caparon for providing the kanamycin cassette, S. R. Kushner for the plasmid pMAK705, and J. W. St. Gerne for critically reading the manuscript. Supported by NIH grant 5RO1GM44655-05, the Swedish Medical Research Council, the Göran Gustafsson Foundation of Natural and Medical Science, and an unrestrictive grant for infectious disease research from Bristol-Myers Squibb.


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