The control of synthesis of bacterial cell walls. Interaction in the synthesis of nucleotide precursors.
Phosphoenolpyruvate-UDP-N-acetylglucosamine enolpyruvyltransferase, UDP-N-acetylglucosamine pyrophosphorylase and CDP-glycerol pyrophosphorylase activities were demonstrated in soluble extracts from Bacillus licheniformis A.T.C.C. 9945. The effect of various nucleotides, sugar nucleotides and sugar phosphates on the nucleotide pyrophosphorylases was investigated. UDP-N-acetylglucosamine pyrophosphorylase was inhibited by UDP-MurAc-pentapeptide (UDP-N-acetylmuramyl-l-alanyl-d-glutamyl- meso-diaminopimelyl-d-alanyl -d-alanine) and CDP-glycerol. CDP-glycerol pyrophosphorylase was inhibited by UDP-MurAc-pentapeptide and stimulated by UDP-N-acetylglucosamine. Interaction between a precursor of one cell-wall polymer and an enzyme involved in the synthesis of a precursor of a second polymer has therefore been demonstrated. The possible role of such interaction in the control of bacterial cell-wall synthesis is discussed. Of the other compounds investigated mono- and di-nucleotides were shown to be inhibitory, indicating that nucleotide pyrophosphorylase activities may be influenced by the energy charge of the cell.
D001407:Bacillus / Q000201:enzymology / Q000378:metabolism*; D002473:Cell Wall / Q000201:enzymology / Q000378:metabolism*; D002854:Chromatography, Paper; D003597:Cytosine Nucleotides; D005944:Glucosamine; D005994:Glycerophosphates; D009702:Nucleoside Diphosphate Sugars; D009711:Nucleotides / Q000096:biosynthesis*; D009713:Nucleotidyltransferases; D010455:Peptides; D010728:Phosphoenolpyruvate; D013403:Sugar Phosphates; D014166:Transferases; D014539:Uridine Diphosphate Sugars
D003597:Cytosine Nucleotides; D005994:Glycerophosphates; D009702:Nucleoside Diphosphate Sugars; D009711:Nucleotides; D010455:Peptides; D013403:Sugar Phosphates; D014539:Uridine Diphosphate Sugars; D010728:Phosphoenolpyruvate; D014166:Transferases; D009713:Nucleotidyltransferases; D005944:Glucosamine