Abstract
The effect of sublethal hydrostatic pressure on the transcriptome of Lactobacillus sanfranciscensis was determined using a shot-gun-microarray. Among the 750 spots that passed quality analysis 42 genes were induced, while six were repressed when cells were incubated at 45 MPa for 30 min. The nature of genes and their differential expression clearly indicate cellular efforts to counteract a decrease in translational capacity. The majority of high pressure affected genes were found to encode either translation factors (EF-G, EF-TU), ribosomal proteins (S2, L6, L11), genes changing translational accuracy or molecular chaperones (GroEL, ClpL). These data agree with previously reported effects observed in in vitro studies as well as with physiological and proteomic data. This study provides in vivo evidence to identify ribosomes and impaired translation among primary targets for high pressure treatment. The observed induction of heat as well as cold shock genes (e.g. hsp60, gyrA) may be explained as a result of high pressure affected protein synthesis.
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This work was supported by the Deutsche Forschungsgemeinschaft (FOR 358/2) and the Ernst BÖCKER GmbH& Co. KG, Minden, Germany.
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Pavlovic, M., Hörmann, S., Vogel, R.F. et al. Transcriptional response reveals translation machinery as target for high pressure in Lactobacillus sanfranciscensis . Arch Microbiol 184, 11–17 (2005). https://doi.org/10.1007/s00203-005-0021-4
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DOI: https://doi.org/10.1007/s00203-005-0021-4