Biomaterial Database

[Phospholipid composition in thermosensitive mutants of Escherichia coli (author's transl)]. 1976

A Barbin, and F Peypoux, and G Michel

Quantitative phospholipid composition was investigated on various thermo-sensitive mutants of Escherichia coli K 12. Phosphatidylethanolamine was the major component. Three mutants (T1, T46 and T5) grown at 40 degrees C, had more anionic phospholipids (phosphatidylglycerol and diphosphatidylglycerol) and less bipolar phospholipids (phosphatidylethanolamine and lysophosphatidylethanolamine) than the wild type. Two mutants strains T46 and T83 which have the same Dna A mutation and identical membrane proteins alterations, have different phospholipid composition. Other mutants, such as T46, exhibit a blocking o? THE INITIATION OF DNA synthesis or morphological alterations under restrictive growth conditions (40 degrees C); however, the phospholipid composition of these mutants is normal and differs from the phospholipid composition of T46.T1 and T5 mutants have the same alterations in the phospholipid composition as T46 although they do not possess Dna A and Div A mutations of the T46 strain. Mutations leading to the alteration of the phospholipid composition are unrelated to other mutations leading to changes in the morphology and cellular division.

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
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
D004269	DNA, Bacterial	Deoxyribonucleic acid that makes up the genetic material of bacteria.	Bacterial DNA
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
D013045	Species Specificity	The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species.	Species Specificities,Specificities, Species,Specificity, Species
D013696	Temperature	The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.	Temperatures