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Figure 7 | BMC Microbiology

Figure 7

From: The ColRS system is essential for the hunger response of glucose-growing Pseudomonas putida

Figure 7

Post-transcriptional regulation of OprB1 depends on the glucose concentration. A. β-Galactosidase (β-Gal) activity expressed from the gtsA promoter was measured in the wild-type P. putida grown on solid medium with 0.2 or 0.8% glucose or 0.2% gluconate. B. SDS-PAGE of the outer membrane protein preparations from P. putida wild-type PaW85 (wt) and from OprB1-overexpressing strain PaWoprB1-tacB1 (B1tacB1) grown 24 hours over the whole Petri plate. The growth medium contained 0.2 or 0.8% glucose (glc) as a carbon source. Plus (+) mark above the lane indicates that the bacterial growth medium contained also 0.5 mM IPTG. C and D. Analysis of the effect of the crc inactivation on the hunger-induced up-regulation of OprB1. The outer membrane proteins were prepared from P. putida wild-type (wt) and crc mutant strains (crc) grown for 24 hours as a lawn over the entire Petri plate. The growth medium contained 0.2 or 0.8% glucose (glc). The ratio of OprB1 to OprF was calculated from the data of at least two independent protein preparations and five independent gel runs. Mean values and 95% confidence intervals are presented.

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