TY - JOUR
T1 - Assessment of flhDC mRNA levels in Serratia liquefaciens swarm cells.
AU - Tolker-Nielsen, Tim
AU - Christensen, A B
AU - Holmstrøm, K
AU - Eberl, L
AU - Rasmussen, T B
AU - Sternberg, C
AU - Heydorn, A
AU - Molin, S
AU - Givskov, Michael
N1 - Keywords: Bacterial Proteins; DNA-Binding Proteins; Escherichia coli Proteins; Gene Expression; Gene Expression Regulation, Bacterial; Isopropyl Thiogalactoside; Operon; RNA, Bacterial; RNA, Messenger; Recombinant Fusion Proteins; Serratia; Trans-Activators
PY - 2000
Y1 - 2000
N2 - We reported previously that artificial overexpression of the flhDC operon in liquid-grown Serratia liquefaciens resulted in the formation of filamentous, multinucleated, and hyperflagellated cells that were indistinguishable from surface-induced swarm cells (L. Eberl, G. Christiansen, S. Molin, and M. Givskov, J. Bacteriol. 178:554-559, 1996). In the present report we show by means of reporter gene measurements, Northern analysis, and in situ reverse transcription-PCR that the amount of flhDC mRNA in surface-grown swarm cells does not exceed the maximum level found in nondifferentiated, vegetative cells. This suggests that surface-induced S. liquefaciens swarm cell differentiation, although dependent on flhDC gene expression, does not occur through elevated flhDC mRNA levels.
AB - We reported previously that artificial overexpression of the flhDC operon in liquid-grown Serratia liquefaciens resulted in the formation of filamentous, multinucleated, and hyperflagellated cells that were indistinguishable from surface-induced swarm cells (L. Eberl, G. Christiansen, S. Molin, and M. Givskov, J. Bacteriol. 178:554-559, 1996). In the present report we show by means of reporter gene measurements, Northern analysis, and in situ reverse transcription-PCR that the amount of flhDC mRNA in surface-grown swarm cells does not exceed the maximum level found in nondifferentiated, vegetative cells. This suggests that surface-induced S. liquefaciens swarm cell differentiation, although dependent on flhDC gene expression, does not occur through elevated flhDC mRNA levels.
M3 - Journal article
C2 - 10781533
SN - 0021-9193
VL - 182
SP - 2680
EP - 2686
JO - Journal of Bacteriology
JF - Journal of Bacteriology
IS - 10
ER -