title: Relationship between mutation of IR in the mtr system of Neisseria gonorrhoeae and multiple antibiotic resistance.
abstract: To study the relationship between mutation of the inverted repeat sequence (IR) in the multiple transferable resistant system (mtr) of Neisseria gonorrhoeae (NG) and its multiple antibiotic resistance, minimal inhibitory concentrations (MICs) for the clinically isolated strains were tested by agar-dilution-method. The mtr system's IR gene of NG was sequenced after amplification by polymerase chain reaction (PCR). Either two susceptive or five penicillin-resistant strains had no base mutation in IR gene, while all of the 13 strains with multiple-antibiotic-resistance had a single-base deletion (A/T). The result suggests that a single-base deletion of the thirteen-base IR sequence in mtr system of NG might result in multiple antibiotic resistance but is not associated with single antibiotic resistance.
authors.affiliation: Department of Dermatology, Union Hospital, Tongji Medica/ College, Huazhong University of Science and Technology, Wuhan, China.
authors.forename: Lixia
authors.initials: L
authors.lastname: Zhang
authors.forename: Nengxing
authors.initials: N
authors.lastname: Lin
authors.forename: Changzheng
authors.initials: C
authors.lastname: Huang
authors.forename: Hongxiang
authors.initials: H
authors.lastname: Chen
authors.forename: Yun
authors.initials: Y
authors.lastname: Lin
authors.forename: Yating
authors.initials: Y
authors.lastname: Tu
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology; D001425:Bacterial Outer Membrane Proteins / Q000235:genetics; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D002939:Ciprofloxacin / Q000494:pharmacology; D004269:DNA, Bacterial / Q000235:genetics; D024901:Drug Resistance, Multiple, Bacterial / Q000235:genetics*; D008074:Lipoproteins / Q000235:genetics; D008565:Membrane Proteins / Q000235:genetics; D026901:Membrane Transport Proteins / Q000235:genetics; D008969:Molecular Sequence Data; D009344:Neisseria gonorrhoeae / Q000187:drug effects / Q000235:genetics*; D012091:Repetitive Sequences, Nucleic Acid / Q000235:genetics*; D012097:Repressor Proteins / Q000235:genetics*; D017384:Sequence Deletion
chemical_list: D000890:Anti-Infective Agents; D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins; D004269:DNA, Bacterial; D008074:Lipoproteins; D008565:Membrane Proteins; D026901:Membrane Transport Proteins; C094589:MtrC protein, Neisseria gonorrhoeae; C107795:MtrD protein, Neisseria gonorrhoeae; C107796:MtrE protein, Neisseria gonorrhoeae; D012097:Repressor Proteins; C087450:mtrR protein, Neisseria gonorrhoeae; D002939:Ciprofloxacin