Biomaterial Database

[Molecular cloning of chlortetracycline resistance gene from chlortetracycline producer Streptomyces aureofaciens]. 1990

G V Sezonov, and L M Isaeva, and N D Lomovskaia

The chlortetracycline (CT) resistance gene ctr was cloned from S. aureofaciens 633, a strain producing the antibiotic. The 6.6-kb DNA Bam HI fragment containing the resistance gene was cloned with the plasmid vector pIJ699. Comparison of the restriction maps of the cloned gene and the oxytetracycline (OT) resistance gene otrA from S. rimosus revealed their similarity which enabled identification of the cloned resistance gene as otrA. Investigation of the resistance determinants in S. aureofaciens 633 made it possible to identify a mtr gene(s). It was demonstrated that introduction of a ctrA gene into S. lividance provided a simultaneous increase in the resistance of the recipient strain to CT and a number of macrolide antibiotics. The CT resistance determinants in S. lividans TK64 showed properties of exogenous induction by CT and the macrolide antibiotics similar to the properties of the mtr gene(s) of S. aureofaciens. Possible adaptation properties of mtr genes are discussed.

UI	MeSH Term	Description	Entries
D010118	Oxytetracycline	A TETRACYCLINE analog isolated from the actinomycete STREPTOMYCES RIMOSUS and used in a wide variety of clinical conditions.	Hydroxytetracycline,Bisolvomycin,Geomycin,Oxyterracin,Oxyterracine,Oxytetracid,Oxytetracycline Anhydrous,Oxytetracycline Calcium,Oxytetracycline Dihydrate,Oxytetracycline Hydrochloride,Oxytetracycline Monohydrochloride,Oxytetracycline Sulfate (2:1),Oxytetracycline, (4a beta,5 beta,5a beta,12a beta)-Isomer,Oxytetracycline, (5 beta)-Isomer,Oxytetracycline, Anhydrous,Oxytetracycline, Calcium (1:1) Salt,Oxytetracycline, Disodium Salt, Dihydrate,Oxytetracycline, Sodium Salt,Terramycin
D011815	R Factors	A class of plasmids that transfer antibiotic resistance from one bacterium to another by conjugation.	R Factor,R Plasmid,R Plasmids,Resistance Factor,Resistance Factors,Factor, R,Factor, Resistance,Factors, R,Factors, Resistance,Plasmid, R,Plasmids, R
D002751	Chlortetracycline	A TETRACYCLINE with a 7-chloro substitution.	Aureocyclin,Aureomycin,Aureomycine,Biomycin,Chlorotetracycline,Chlortetracycline Bisulfate,Chlortetracycline Hydrochloride,Chlortetracycline Monohydrochloride,Chlortetracycline Sulfate (1:1),Chlortetracycline Sulfate (2:1),Chlortetracycline, 4-Epimer,Chlortetracycline, Calcium Salt,4-Epimer Chlortetracycline,Bisulfate, Chlortetracycline,Calcium Salt Chlortetracycline,Chlortetracycline, 4 Epimer,Hydrochloride, Chlortetracycline,Monohydrochloride, Chlortetracycline,Salt Chlortetracycline, Calcium
D003001	Cloning, Molecular	The insertion of recombinant DNA molecules from prokaryotic and/or eukaryotic sources into a replicating vehicle, such as a plasmid or virus vector, and the introduction of the resultant hybrid molecules into recipient cells without altering the viability of those cells.	Molecular Cloning
D004269	DNA, Bacterial	Deoxyribonucleic acid that makes up the genetic material of bacteria.	Bacterial DNA
D004352	Drug Resistance, Microbial	The ability of microorganisms, especially bacteria, to resist or to become tolerant to chemotherapeutic agents, antimicrobial agents, or antibiotics. This resistance may be acquired through gene mutation or foreign DNA in transmissible plasmids (R FACTORS).	Antibiotic Resistance,Antibiotic Resistance, Microbial,Antimicrobial Resistance, Drug,Antimicrobial Drug Resistance,Antimicrobial Drug Resistances,Antimicrobial Resistances, Drug,Drug Antimicrobial Resistance,Drug Antimicrobial Resistances,Drug Resistances, Microbial,Resistance, Antibiotic,Resistance, Drug Antimicrobial,Resistances, Drug Antimicrobial
D005798	Genes, Bacterial	The functional hereditary units of BACTERIA.	Bacterial Gene,Bacterial Genes,Gene, Bacterial
D006824	Hybridization, Genetic	The genetic process of crossbreeding between genetically dissimilar parents to produce a hybrid.	Crossbreeding,Hybridization, Intraspecies,Crossbreedings,Genetic Hybridization,Genetic Hybridizations,Hybridizations, Genetic,Hybridizations, Intraspecies,Intraspecies Hybridization,Intraspecies Hybridizations
D013304	Streptomyces aureofaciens	An actinomycete from which the antibiotic CHLORTETRACYCLINE is obtained.
D066298	In Vitro Techniques	Methods to study reactions or processes taking place in an artificial environment outside the living organism.	In Vitro Test,In Vitro Testing,In Vitro Tests,In Vitro as Topic,In Vitro,In Vitro Technique,In Vitro Testings,Technique, In Vitro,Techniques, In Vitro,Test, In Vitro,Testing, In Vitro,Testings, In Vitro,Tests, In Vitro,Vitro Testing, In