The cell cycle-regulated flagellar gene flbF of Caulobacter crescentus is homologous to a virulence locus (lcrD) of Yersinia pestis
10.1128/jb.173.22.7283-7292.1991
Crossref journal-article
American Society for Microbiology
Journal of Bacteriology (235)
Abstract

We have characterized flbF, a key locus located at the top of the flagellar gene hierarchy of Caulobacter crescentus. This gene is required for transcription from sigma 54 promoters of fla genes expressed late in the cell cycle. We have determined the nucleotide sequence of the gene, mapped the 5' end of the flbF RNA, and examined the pattern of expression in the cell cycle. Our results show that flbF is expressed earlier in the cell cycle than other fla genes, that it is expressed at a low level throughout the stalked cell cycle, and that its 5' regulatory region contains sequences that can be aligned with the sigma 28 promoter consensus reported for enteric bacteria. flbF contains an open reading frame of 700 residues with an amino-terminal half rich in hydrophobic residues that could correspond to six to eight transmembrane domains. The translated flbF sequence is very similar to LcrD (low calcium response) encoded by virulence plasmids of pathogenic Yersinia spp. (G. Plano, S. Barve, and S. Straley, J. Bacteriol. 173:7293-7303, 1991). LcrD and FlbF can be aligned over the entire length of the proteins with the greatest degree of sequence identity (45%) in the hydrophobic amino-terminal region. The high degree of sequence homology of proteins derived from widely differing organisms, including Caulobacter and Yersinia species, suggests that FlbF and LcrD may be representatives of a larger family of regulatory proteins with a common sensor mechanism for modifying responses to appropriate stimuli.

Bibliography

Ramakrishnan, G., Zhao, J. L., & Newton, A. (1991). The cell cycle-regulated flagellar gene flbF of Caulobacter crescentus is homologous to a virulence locus (lcrD) of Yersinia pestis. Journal of Bacteriology, 173(22), 7283–7292.

Authors 3
  1. G Ramakrishnan (first)
  2. J L Zhao (additional)
  3. A Newton (additional)
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Dates
Type When
Created 8 years, 9 months ago (Nov. 4, 2016, 1:58 p.m.)
Deposited 4 years ago (July 29, 2021, 1:45 p.m.)
Indexed 1 year, 9 months ago (Nov. 23, 2023, 3:54 p.m.)
Issued 33 years, 9 months ago (Nov. 1, 1991)
Published 33 years, 9 months ago (Nov. 1, 1991)
Published Print 33 years, 9 months ago (Nov. 1, 1991)
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@article{Ramakrishnan_1991, title={The cell cycle-regulated flagellar gene flbF of Caulobacter crescentus is homologous to a virulence locus (lcrD) of Yersinia pestis}, volume={173}, ISSN={1098-5530}, url={http://dx.doi.org/10.1128/jb.173.22.7283-7292.1991}, DOI={10.1128/jb.173.22.7283-7292.1991}, number={22}, journal={Journal of Bacteriology}, publisher={American Society for Microbiology}, author={Ramakrishnan, G and Zhao, J L and Newton, A}, year={1991}, month=nov, pages={7283–7292} }