DnaK, DnaJ, and GrpE are required for flagellum synthesis in Escherichia coli.
The DnaK, DnaJ, and GrpE heat shock proteins are required for motility of Escherichia coli. Cells deleted for dnaK or dnaJ, or with some mutations in the dnaK or grpE gene, are nonmotile, lack flagella, exhibit a 10- to 20-fold decrease in the rate of synthesis of flagellin, and show reduced rates of transcription of both the flhD master operon (encoding FlhD and FlhC) and the fliA operon (encoding sigma F). Genetic studies suggest that DnaK and DnaJ define a regulatory pathway affecting flhD and fliA synthesis that is independent of cyclic AMP-catabolite gene activator protein or the chemotaxis system.
Shi
W
W
Department of Biochemistry, University of Wisconsin, Madison 53706.
Zhou
Y
Y
Wild
J
J
Adler
J
J
Gross
C A
CA
D001426:Bacterial Proteins / Q000235:genetics*; D002465:Cell Movement / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism / Q000648:ultrastructure; D029968:Escherichia coli Proteins; D005407:Flagella / Q000502:physiology* / Q000648:ultrastructure; D005408:Flagellin / Q000096:biosynthesis; D005809:Genes, Regulator; D050956:HSP40 Heat-Shock Proteins; D018840:HSP70 Heat-Shock Proteins; D006360:Heat-Shock Proteins / Q000235:genetics*; D009154:Mutation; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis; D014158:Transcription, Genetic
D001426:Bacterial Proteins; C494635:DnaJ protein, E coli; D029968:Escherichia coli Proteins; C068113:GrpE protein, Bacteria; C489400:GrpE protein, E coli; D050956:HSP40 Heat-Shock Proteins; D018840:HSP70 Heat-Shock Proteins; D006360:Heat-Shock Proteins; D011993:Recombinant Fusion Proteins; D005408:Flagellin; C063842:dnaK protein, E coli