Biomaterial Database

[A genetic and physiologic study of mutations of T4 phage suppressing the lysis defect of gene stII mutants]. 1975

N K Iankovskiĭ, and V N Krylov

A new gene rVI phage T4B is found. Mutations rVI belong to the class of r-mutations of T4B. Mutations rVI do not show the lysis inhibition after superinfection and determine the r-morphology of plaques on Escherichia coli CR63 lawn. Mutations rVI are gene-specific suppressors of stII lysis defect, but do not suppress the e lysis defect. Alleles rVI and rVI+ are co-dominated with regard to the ability to suppress the stII lysis defect. The suggest the stoichiometric character of rVI gene function. Mutations rVI increase the permeability of infected cells before the lysis. The gene rVI located between the genes 56 and 39 on the T4B genetic map, close to the gene 56. The still mutations described earlier (Krylov, Yankovsky, 1973) suppress the lysis defect of the am z25 mutant in the gene e. The suppression is manifested when infected bacteria develope only in the liquid media.

UI	MeSH Term	Description	Entries
D008242	Lysogeny	The phenomenon by which a temperate phage incorporates itself into the DNA of a bacterial host, establishing a kind of symbiotic relation between PROPHAGE and bacterium which results in the perpetuation of the prophage in all the descendants of the bacterium. Upon induction (VIRUS ACTIVATION) by various agents, such as ultraviolet radiation, the phage is released, which then becomes virulent and lyses the bacterium.	Integration, Prophage,Prophage Integration,Integrations, Prophage,Prophage Integrations
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
D002463	Cell Membrane Permeability	A quality of cell membranes which permits the passage of solvents and solutes into and out of cells.	Permeability, Cell Membrane
D003090	Coliphages	Viruses whose host is Escherichia coli.	Escherichia coli Phages,Coliphage,Escherichia coli Phage,Phage, Escherichia coli,Phages, Escherichia coli
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