PilJ localizes to cell poles and is required for type IV pilus extension in Pseudomonas aeruginosa.
Twitching motility allows Pseudomonas aeruginosa to respond to stimuli by extending and retracting its type IV pili (TFP). PilJ is a protein necessary for this surface-associated twitching motility and bears high sequence identity with Escherichia coli methyl-accepting chemotaxis proteins (MCP). Here, we report that whereas wild-type P. aeruginosa PAO1 cells have extended pili at a single pole, pilJ mutant cells have shortened pili often at both poles despite normal levels of pilin accumulation, suggesting that PilJ is required for full TFP assembly/extension. Using yellow fluorescent protein fusions (pilJ-yfp), both plasmid born and in-frame chromosomal constructs, we determined that PilJ localizes to both poles of the cell. Overexpression of pilJ-yfp resulted in the protein accumulating between the poles.
DeLange
Paul A
PA
Biology Department, University of Dayton, 300 College Park, Dayton, OH 45469-2320, USA.
Collins
Tracy L
TL
Pierce
George E
GE
Robinson
Jayne B
JB
D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism* / Q000502:physiology; D015153:Blotting, Western; D036781:Fimbriae Proteins / Q000235:genetics / Q000378:metabolism* / Q000502:physiology; D010861:Fimbriae, Bacterial / Q000378:metabolism* / Q000502:physiology; D008164:Luminescent Proteins / Q000235:genetics / Q000378:metabolism; D008856:Microscopy, Fluorescence; D009154:Mutation; D011550:Pseudomonas aeruginosa / Q000235:genetics / Q000378:metabolism* / Q000502:physiology; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism
D001426:Bacterial Proteins; D008164:Luminescent Proteins; D011993:Recombinant Fusion Proteins; C086591:pilJ protein, Pseudomonas aeruginosa; C054562:yellow fluorescent protein, Bacteria; D036781:Fimbriae Proteins
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