Biomaterial Database

[Evidence for plasmidic localization of "beta-lactamase" gene in a Pseudomonas aeruginosa strain, highly resistant to carbenicillin]. 1978

M Jouvenot, and Y Michel-Briand, and J M Laporte

Pseudomonas aeruginosa strain HL, isolated in Besançon (France), shows a high level of resistance for carbenicillin, as proved in preliminary studies. In this paper, we report the transfer of carbenicillin resistance from Pseudomonas aeruginosa HL1 carrying helper plasmids to other strains of the same species. Comparative study of beta-lactamase activity in the HL1 strain and in the conjugated strains allows confirmation of the transfer of an R-factor from the HL1 strain: in all these strains, the beta-lactamase has the same pI (5.3) and the same Vmax (relative to benzylpenicillin) for ampicillin, carbenicillin and cephaloridin.

UI	MeSH Term	Description	Entries
D007525	Isoelectric Focusing	Electrophoresis in which a pH gradient is established in a gel medium and proteins migrate until they reach the site (or focus) at which the pH is equal to their isoelectric point.	Electrofocusing,Focusing, Isoelectric
D010403	Penicillin Resistance	Nonsusceptibility of an organism to the action of penicillins.	Penicillin Resistances,Resistance, Penicillin,Resistances, Penicillin
D010957	Plasmids	Extrachromosomal, usually CIRCULAR DNA molecules that are self-replicating and transferable from one organism to another. They are found in a variety of bacterial, archaeal, fungal, algal, and plant species. They are used in GENETIC ENGINEERING as CLONING VECTORS.	Episomes,Episome,Plasmid
D011550	Pseudomonas aeruginosa	A species of gram-negative, aerobic, rod-shaped bacteria commonly isolated from clinical specimens (wound, burn, and urinary tract infections). It is also found widely distributed in soil and water. P. aeruginosa is a major agent of nosocomial infection.	Bacillus aeruginosus,Bacillus pyocyaneus,Bacterium aeruginosum,Bacterium pyocyaneum,Micrococcus pyocyaneus,Pseudomonas polycolor,Pseudomonas pyocyanea
D002228	Carbenicillin	Broad-spectrum semisynthetic penicillin derivative used parenterally. It is susceptible to gastric juice and penicillinase and may damage platelet function.	Carboxybenzyl Penicillin,Anabactyl,Carbapen,Carbecin,Carbenicillin Disodium,Geopen,Microcillin,Pyopen,Disodium, Carbenicillin,Penicillin, Carboxybenzyl
D003227	Conjugation, Genetic	A parasexual process in BACTERIA; ALGAE; FUNGI; and ciliate EUKARYOTA for achieving exchange of chromosome material during fusion of two cells. In bacteria, this is a uni-directional transfer of genetic material; in protozoa it is a bi-directional exchange. In algae and fungi, it is a form of sexual reproduction, with the union of male and female gametes.	Bacterial Conjugation,Conjugation, Bacterial,Genetic Conjugation
D001618	beta-Lactamases	Enzymes found in many bacteria which catalyze the hydrolysis of the amide bond in the beta-lactam ring. Well known antibiotics destroyed by these enzymes are penicillins and cephalosporins.	beta-Lactamase,beta Lactamase,beta Lactamases