Abstract
Rhodobacter sphaeroides only showed chemotaxis towards ammonia if grown under nitrogen-limited conditions. This chemotactic response was completely inhibited by the addition of methionine sulfoximine. There was no effect of methionine sulfoximine treatment on motility or taxis towards propionate, demonstrating that the effect is specific to ammonia taxis. It is known that methionine sulfoximine inhibits glutamine synthetase and hence blocks ammonia assimilation. Methionine sulfoximine does not inhibit ammonia transport in R. sphaeroides; therefore, these results suggest that limited metabolism via a specific pathway is required subsequent to transport to elicit a chemotactic response to ammonia. Bacteria grown on high ammonia show transport but no chemotactic response to ammonia, suggesting that the pathway of assimilation is important in eliciting a chemotactic response.
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Dates
Type | When |
---|---|
Created | 8 years, 10 months ago (Nov. 4, 2016, 1:48 p.m.) |
Deposited | 4 years, 1 month ago (July 29, 2021, 1:43 p.m.) |
Indexed | 1 year, 7 months ago (Feb. 1, 2024, 1:57 p.m.) |
Issued | 36 years, 4 months ago (May 1, 1989) |
Published | 36 years, 4 months ago (May 1, 1989) |
Published Print | 36 years, 4 months ago (May 1, 1989) |
@article{Poole_1989, title={Role of metabolism in the chemotactic response of Rhodobacter sphaeroides to ammonia}, volume={171}, ISSN={1098-5530}, url={http://dx.doi.org/10.1128/jb.171.5.2900-2902.1989}, DOI={10.1128/jb.171.5.2900-2902.1989}, number={5}, journal={Journal of Bacteriology}, publisher={American Society for Microbiology}, author={Poole, P S and Armitage, J P}, year={1989}, month=may, pages={2900–2902} }