Difference between revisions of "Part:BBa K1019000"

Latest revision as of 03:25, 28 September 2013

FimB: positive regulator of type I fimbriae

The fimB gene encodes for the FimB protein, a transcriptional regulator which mediates off to on switching of the major type 1 subunit fimbrin (pilin) FimA and other fimbrial genes in the fim operon.

Usage and Biology

The fimE gene acts opposite to fimB by mediating the on to off switching of the fim switch/promoter, fimS, which allows fimA (and associated fim operon genes) to be expressed depending on its state. Both fimB and fimE are recombinases that catalyze the inversion of fimS, thus controlling the expression of fimbriae.

Overexpression of fimB should in principle encourage fimbriae formation, thus leading to increased adherence to cells and surfaces. Fimbriae expression constitutes a defining feature of biofilms.

For further information please refer to [http://www.ecocyc.org/ECOLI/NEW-IMAGE?type=GENE&object=EG10309 EcoCyc].

References

Escherichia coli K-12 substr. MG1655 Polypeptide: regulator for fimA. (2013). Ecocyc. Retrieved May 26, 2013, from http://www.ecocyc.org/ECOLI/NEW-IMAGE?type=GENE&object=EG10309

Sequence and Features

Assembly Compatibility:

10
COMPATIBLE WITH RFC[10]
12
COMPATIBLE WITH RFC[12]
21
COMPATIBLE WITH RFC[21]
23
COMPATIBLE WITH RFC[23]
25
COMPATIBLE WITH RFC[25]
1000
COMPATIBLE WITH RFC[1000]

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 ===Usage and Biology===
-The fimE acts opposite to fimB by mediating the '''on to off''' switching of the fim switch/promoter, fimS, which allows fimA (and associated fim operon genes) to be expressed depending on its state. Both fimB and fimE are recombinases that catalyze the inversion of fimS, thus controlling the expression of fimbriae.
+The fimE gene acts opposite to fimB by mediating the '''on to off''' switching of the fim switch/promoter, fimS, which allows fimA (and associated fim operon genes) to be expressed depending on its state. Both fimB and fimE are recombinases that catalyze the inversion of fimS, thus controlling the expression of fimbriae.
-Overexpression of fimB should in principle encourage fimbriae formation, thus leading to increased adherence to cells and surfaces. Fimbrial expression constitutes a defining feature of biofilms.
+Overexpression of fimB should in principle encourage fimbriae formation, thus leading to increased adherence to cells and surfaces. Fimbriae expression constitutes a defining feature of biofilms.
-For further information and detailed references please refer to [http://www.ecocyc.org/ECOLI/NEW-IMAGE?type=GENE&object=EG10309 EcoCyc]
+For further information please refer to [http://www.ecocyc.org/ECOLI/NEW-IMAGE?type=GENE&object=EG10309 EcoCyc].
-Woooo hooo
 ===References===
+Escherichia coli K-12 substr. MG1655 Polypeptide: regulator for fimA. (2013). Ecocyc. Retrieved May 26, 2013, from http://www.ecocyc.org/ECOLI/NEW-IMAGE?type=GENE&object=EG10309
-Klemm, P. (1986). Two regulatory fim genes, fimB and fimE, control the phase variation of type 1 fimbriae in Escherichia coli. The EMBO journal, 5(6), 1389.
-Pallesen, L., Madsen, O., & Klemm, P. (1989). Regulation of the phase switch controlling expression of type 1 fimbriae in Escherichia coli. Molecular microbiology, 3(7), 925-931.
-McCLAIN, M. S., Blomfield, I. C., & Eisenstein, B. I. (1991). Roles of fimB and fimE in site-specific DNA inversion associated with phase variation of type 1 fimbriae in Escherichia coli. Journal of bacteriology, 173(17), 5308-5314.
-Gally, D. L., Leathart, J., & Blomfield, I. C. (1996). Interaction of FimB and FimE with the fim switch that controls the phase variation of type 1 fimbriae in Escherichia coli K‐12. Molecular microbiology, 21(4), 725-738.
 ===<span class='h3bb'>Sequence and Features</span>===