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. 1990 Jul;172(7):4002–4007. doi: 10.1128/jb.172.7.4002-4007.1990

Prey-derived signals regulating duration of the developmental growth phase of Bdellovibrio bacteriovorus.

K M Gray 1, E G Ruby 1
PMCID: PMC213385  PMID: 2193927

Abstract

The filamentous elongation typical of growth-phase cells of the predatory bacterium Bdellovibrio bacteriovorus is mediated by regulatory signals that are derived from the prey cell itself. These signals regulate the differentiation of growth-phase cells into the attack phase and appear to be required for continued filamentous growth by prey-dependent wild-type bdellovibrios and their prey-independent mutant derivatives alike. Using a prey-independent bdellovibrio strain, we have developed an assay for the detection and quantification of the growth-extending signal activity present in extracts of prey cells. This prey-derived regulatory activity was shown to be independent of its nutritional contribution to the bdellovibrios and was found to occur in heat-stable, proteinlike compounds of a variety of native molecular weights within the soluble fraction of extracts from both gram-negative and gram-positive bacteria.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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