Abstract
Many strains of Escherichia coli express type 1 pili which undergo phase variation during growth in broth, but become uniformly nonpiliated when passaged on agar media. In a previous analysis of these agar phase locked strains, we demonstrated that fimB and fimE, which mediate the site-specific DNA rearrangement involved in phase variation, are differentially transcribed under the two growth conditions. In this study the fimB promoter region was sequenced and characterized in agar phase locked strain J96. Primer extension analysis of the fimB gene identified three putative transcription initiation sites. Transcription starting from two of the sites (P 1 and P 2) would produce an mRNA that approximates the transcript size of fimB previously detected by Northern blot hybridizations. Gel mobility shift studies revealed the presence of promoter binding activity in broth-grown cell extracts, but not in extracts from agargrown cells, that reacted specifically with DNA fragments upstream of the P 1 and P 2 promoter regions. This putative binding protein may be involved in the regulation of fimB perhaps by acting as a transcriptional activator.
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References
Abraham JM, Freitag CS, Clements JR, Eisenstein BI (1985) An invertible element of DNA controls phase variation of Escherichia coli. Proc Natl Acad Sci USA 82:5724–5727
Blomfield IC, McClain MS, Princ JA, Calie PJ, Eisenstein BI (1991) Type 1 fimbriation and fimE mutants of Escherichia coli K-12. Bacteriol 173:5298–5307
Blomfield IC, Calie PJ, Eberhardt KJ, McClain MS, Eisenstein BI (1993) Lrp stimulates phase variation of type 1 fimbriation in Escherichia coli K-12. J Bacteriol 175:27–36
Bradford MM (1976) A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding. Anal Biochem 72:248–254
Brinton CC Jr (1959) Non-flagellar appendages of type 1 fimbriae of bacteria. Nature 183:782–786
Dorman CJ, Higgins CF (1987) Fimbrial phase variation in Escherichia coli: dependence on integration host factor and homologies with other site-specific recombinases. J Bacteriol 169:3840–3843
Duguid JP, Smith W, Dempster G, Edwards PN (1955) Nonflagellar filamentous appendages (fimbriae) and hemagglutinating activity in Bacterium coli. J Pathol Bacteriol 70:335–348
Eisenstein BI (1981) Phase variation of type 1 fimbriae in Escherichia coli is under transcriptional control. Science 214:337–339
Eisenstein BI, Sweet DS, Vaughn V, Friedman DI (1987) Integration host factor is required for the DNA inversion that controls phase variation in Escherichia coli. Proc Natl Acad Sci USA 84:6506–6510
Hawley D, McClure W (1983) Compilation analysis of Escherichia coli promoter DNA sequences. Nucleic Acids Res 11:22337–2255
Hoopes BC, McClure WR (1987) Strategies in regulation of transcription initiation. In: Neidhardt RC, Ingraham JL, Low KB, Magasanik B, Schaechter M, Umbarger HE (eds), Escherichia coli and Salmonella typhimurium. Cellular and molecular biology. American Society for Microbiology, Washington DC, pp 1231–1240
Huh YJ, Weiss AA (1991) A 23-kilodalton protein, distinct from bvgA, expressed by virulent Bordetella pertussis binds to the promoter region or vir-regulated toxin genes. Infect Immun 59:2389–2395
Hull RA, Gill RE, Hsu P, Minshew BH, Falkow S (1981) Construction and expression of recombinant plasmids encoding type 1 or d-mannose-resistant pili form a urinary tract infection Escherichia coli isolate. Infect Immun 33:933–938
Hultgren SJ, Porter TN, Schaeffer AJ, Duncan JL (1985) Role of type 1 pili and effects of phase variation on lower urinary tract infection produced by Escherichia coli. Infect Immun 50:370–377
Hultgren SJ, Schwan WR, Schaeffer AJ, Duncan JL (1986) Regulation of production of type 1 pili among urinary tract isolates of Escherichia coli. Infect Immun 54:613–620
Kawula TH, Orndorff PE (1991) Rapid site-specific DNA inversion in Escherichia coli mutants lacking the histone-like protein HNS. J Bacteriol 173:4116–4123
Klemm P (1985) The fimA gene encoding the type-1 fimbrial subunit of Escherichia coli: nucleotide sequence and primary structure of the protein. Eur J Biochem 143:359–399
Klemm P (1986) Two regulatory fim genes, fimB and fimE control the phase variation of type 1 fimbriae in Escherichia coli. EMBO J 5:1384–1393
McClain MS, Blomfield IC, Eisenstein BI (1991) Roles of fimB and fimE in site-specific DNA inversion associated with phase variation of type 1 fimbriae in Escherichia coli. J Bacteriol 173:5308–5314
Miller HI, Friedman DI (1980) An E. coli gene product required for site-specific recombination. Cell 20:711–719
Miller JH (1972) Experiments in molecular genetics. Cold Spring Harbor Laboratory, Cold Spring Harbor, NY
Old DC, Duguid JP (1970) Selective outgrowth of fimbriate bacteria in static liquid medium. J Bacteriol 103:447–456
Orndorff PE, Falkow S (1984a) Organization and expression of genes responsible for type 1 piliation in Escherichia coli. J Bacteriol 159:736–744
Orndorff PE, Falkow S (1984b) Identification and characterization of a gene product that regulates type 1 piliation in Escherichia coli. J Bacteriol 160:61–66
Orndorff PE, Falkow S (1985) Nucleotide sequence of pilA, the gene encoding the structural component of type 1 pili in Escherichia coli. J Bacteriol 162:454–457
Pallesen L, Madsen O, Klemm P (1989) Regulation of the phase switch controlling expression of type 1 fimbriae in Escherichia coli. Mol Microbiol 3:925–931
Sambrook J, Fritsch EF, Maniatis T (1989) Molecular cloning: a laboratory manual. Cold Spring Harbor Laboratory, Cold Spring Harbor, New York
Schwan WR, Seifert HS, Duncan JL (1992) Growth conditions mediate differential transcription of fim genes involved in phase variation of type 1 pili. J Bacteriol 174:2367–2375
Spears PA, Schauer D, Orndorff PE (1986) Metastable regulation of type 1 piliation in Escherichia coli and isolation and characterization of a phenotypically stable mutant. J Bacteriol 168:179–185
von Gabain A, Belasco JG, Schottel JL, Chang ACY, Cohen SN (1983) Decay of mRNA in Escherichia coli: investigation of the fate of specific segments of transcripts. Proc Natl Acad Sci USA 80:653–657
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Schwan, W.R., Seifert, H.S. & Duncan, J.L. Analysis of the fimB promoter region involved in type 1 pilus phase variation in Escherichia coli . Molec. Gen. Genet. 242, 623–630 (1994). https://doi.org/10.1007/BF00285286
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DOI: https://doi.org/10.1007/BF00285286