Biomaterial Database

Escherichia coli mutants defective in membrane phospholipid synthesis: binding and metabolism of 1-oleoylglycerol 3-phosphate by a plsB deep rough mutant. 1978

T M McIntyre, and R M Bell

Mutants of Escherichia coli containing a defective sn-glycerol 3-phosphate acyltransferase are conditionally defective in the synthesis of acylglycerol phosphate (acylglycerol-P). Incubation of a deep rough derivative of one of these plsB strains with 1-[3H]oleoylglycerol-32P resulted in the binding of up to 70 nmol of oleoylglycerol-P per 100 nmol of cellular phospholipid. The binding was dependent on time, oleoylglycerol-P concentration, and the quantity of cells employed. The rate and extent of oleoylglycerol-P binding was affected by the deep rough mutation. The altered phospholipid composition due to oleoylglycerol-P binding was without consequence on cell growth and viability, but caused the appearance of intracellular multilamellar structures. Use of the double-labeled oleoylglycerol P demonstrated that the entire molecule was bound to the cell. Intact [3H]-oleoylglycerol-32P was converted to phosphatidylethanolamine and phosphotidyl-glycerol at a rate about 40% of that of de novo phospholipid synthesis. These data demonstrate the transmembrane movement of oleoylglycerol-P to the inner surface of the cytoplasmic membrane and suggest that it may become possible to supplement plsB strains of E. coli with acylglycerol-P's.

UI	MeSH Term	Description	Entries
D009154	Mutation	Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations.	Mutations
D010714	Phosphatidylethanolamines	Derivatives of phosphatidic acids in which the phosphoric acid is bound in ester linkage to an ethanolamine moiety. Complete hydrolysis yields 1 mole of glycerol, phosphoric acid and ethanolamine and 2 moles of fatty acids.	Cephalin,Cephalins,Ethanolamine Phosphoglyceride,Ethanolamine Phosphoglycerides,Ethanolamineglycerophospholipids,Phosphoglyceride, Ethanolamine,Phosphoglycerides, Ethanolamine
D010715	Phosphatidylglycerols	A nitrogen-free class of lipids present in animal and particularly plant tissues and composed of one mole of glycerol and 1 or 2 moles of phosphatidic acid. Members of this group differ from one another in the nature of the fatty acids released on hydrolysis.	Glycerol Phosphoglycerides,Monophosphatidylglycerols,Phosphatidylglycerol,Phosphatidyl Glycerol,Glycerol, Phosphatidyl,Phosphoglycerides, Glycerol
D010743	Phospholipids	Lipids containing one or more phosphate groups, particularly those derived from either glycerol (phosphoglycerides see GLYCEROPHOSPHOLIPIDS) or sphingosine (SPHINGOLIPIDS). They are polar lipids that are of great importance for the structure and function of cell membranes and are the most abundant of membrane lipids, although not stored in large amounts in the system.	Phosphatides,Phospholipid
D002462	Cell Membrane	The lipid- and protein-containing, selectively permeable membrane that surrounds the cytoplasm in prokaryotic and eukaryotic cells.	Plasma Membrane,Cytoplasmic Membrane,Cell Membranes,Cytoplasmic Membranes,Membrane, Cell,Membrane, Cytoplasmic,Membrane, Plasma,Membranes, Cell,Membranes, Cytoplasmic,Membranes, Plasma,Plasma Membranes
D004926	Escherichia coli	A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc.	Alkalescens-Dispar Group,Bacillus coli,Bacterium coli,Bacterium coli commune,Diffusely Adherent Escherichia coli,E coli,EAggEC,Enteroaggregative Escherichia coli,Enterococcus coli,Diffusely Adherent E. coli,Enteroaggregative E. coli,Enteroinvasive E. coli,Enteroinvasive Escherichia coli
D005992	Glycerol-3-Phosphate O-Acyltransferase	An enzyme that transfers acyl groups from acyl-CoA to glycerol-3-phosphate to form monoglyceride phosphates. It acts only with CoA derivatives of fatty acids of chain length above C-10. Also forms diglyceride phosphates. EC 2.3.1.15.	Glycerolphosphate Acyltransferase,Stearyl-CoA Glycerophosphate Transstearylase,Acyl-CoA Sn-Glycerol-3-Phosphate-O-Acyltransferase,Glycerophosphate Acyltransferase,Acyl CoA Sn Glycerol 3 Phosphate O Acyltransferase,Acyltransferase, Glycerolphosphate,Acyltransferase, Glycerophosphate,Glycerol 3 Phosphate O Acyltransferase,Glycerophosphate Transstearylase, Stearyl-CoA,O-Acyltransferase, Glycerol-3-Phosphate,Sn-Glycerol-3-Phosphate-O-Acyltransferase, Acyl-CoA,Stearyl CoA Glycerophosphate Transstearylase,Transstearylase, Stearyl-CoA Glycerophosphate
D005994	Glycerophosphates	Any salt or ester of glycerophosphoric acid.	Glycerolphosphate,Glycerophosphate,Calcium Glycerophosphate,Glycerolphosphates,Glycerophosphate, Calcium