The role of phosphatidylglycerol in the vectorial phosphorylation of sugar by isolated bacterial membrane preparations.
Phospholipase D (cabbage) inhibits the vectorial phosphorylation of alpha-methylglucoside by isolated membrane preparations from Escherichia coli ML 308-225 without increasing the efflux of intramembranal alpha-methylglucoside-P. This effect is shown to be related to the ability of phospholipase D to hydrolyze membrane phosphatidylglycerol specifically. After treatment with phospholipase D, the membranes resynthesize phosphatidylglycerol with a return in their ability to take up alpha-methylglucoside. Since proline uptake by the same preparations is only slightly inhibited by phospholipase D, the data indicate that phosphatidylglycerol is required specifically for transport processes which are mediated by the P-enolpyruvate-P-transferase system.
D002247:Carbon Isotopes; D002462:Cell Membrane / Q000201:enzymology*; D004926:Escherichia coli / Q000201:enzymology; D005990:Glycerol / Q000378:metabolism; D006027:Glycosides / Q000378:metabolism*; D010740:Phospholipases / Q000378:metabolism*; D010743:Phospholipids / Q000378:metabolism; D010759:Phosphorus Isotopes
D002247:Carbon Isotopes; D006027:Glycosides; D010743:Phospholipids; D010759:Phosphorus Isotopes; D010740:Phospholipases; D005990:Glycerol