Crossref journal-article
American Society for Microbiology
Journal of Bacteriology (235)
Abstract

ABSTRACT Obg, an essential GTP binding protein of Bacillus subtilis , is necessary for stress activation of the ς B transcription factor. We investigated Obg's cellular associations by differential centrifugation of crude B. subtilis extracts, using an anti-Obg antibody as a probe to monitor Obg during the fractionation, and by fluorescent microscopy of a B. subtilis strain in which Obg was fused to green fluorescent protein. The results indicated that Obg is part of a large cytoplasmic complex. In subsequent analyses, Obg coeluted with ribosomal subunits during gel filtration of B. subtilis lysates on Sephacryl S-400 and specifically bound to ribosomal protein L13 in an affinity blot assay. Probing the gel filtration fractions with antibodies specific for ς B and its coexpressed regulators (Rsb proteins) revealed coincident elution of the upstream components of the ς B stress activation pathway (RsbR, -S, and -T) with Obg and the ribosomal subunits. The data implicate ribosome function as a possible mediator of the activity of Obg and the stress induction of ς B .

Bibliography

Scott, J. M., Ju, J., Mitchell, T., & Haldenwang, W. G. (2000). The Bacillus subtilis GTP Binding Protein Obg and Regulators of the ς B Stress Response Transcription Factor Cofractionate with Ribosomes. Journal of Bacteriology, 182(10), 2771–2777.

Authors 4
  1. Janelle M. Scott (first)
  2. Jingliang Ju (additional)
  3. Theresa Mitchell (additional)
  4. W. G. Haldenwang (additional)
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Dates
Type When
Created 23 years, 1 month ago (July 27, 2002, 6 a.m.)
Deposited 4 years, 1 month ago (July 29, 2021, 1:52 p.m.)
Indexed 2 months ago (July 2, 2025, 2:31 p.m.)
Issued 25 years, 3 months ago (May 15, 2000)
Published 25 years, 3 months ago (May 15, 2000)
Published Print 25 years, 3 months ago (May 15, 2000)
Funders 0

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@article{Scott_2000, title={The Bacillus subtilis GTP Binding Protein Obg and Regulators of the ς B Stress Response Transcription Factor Cofractionate with Ribosomes}, volume={182}, ISSN={1098-5530}, url={http://dx.doi.org/10.1128/jb.182.10.2771-2777.2000}, DOI={10.1128/jb.182.10.2771-2777.2000}, number={10}, journal={Journal of Bacteriology}, publisher={American Society for Microbiology}, author={Scott, Janelle M. and Ju, Jingliang and Mitchell, Theresa and Haldenwang, W. G.}, year={2000}, month=may, pages={2771–2777} }