0000000000446859

AUTHOR

Leslie Germé

showing 1 related works from this author

Role of AxyZ Transcriptional Regulator in Overproduction of AxyXY-OprZ Multidrug Efflux System in Achromobacter Species Mutants Selected by Tobramycin

2017

ABSTRACT AxyXY-OprZ is an RND-type efflux system that confers innate aminoglycoside resistance to Achromobacter spp. We investigated here a putative TetR family transcriptional regulator encoded by the axyZ gene located upstream of axyXY-oprZ . An in-frame axyZ gene deletion assay led to increased MICs of antibiotic substrates of the efflux system, including aminoglycosides, cefepime, fluoroquinolones, tetracyclines, and erythromycin, indicating that the product of axyZ negatively regulates expression of axyXY-oprZ . Moreover, we identified an amino acid substitution at position 29 of AxyZ (V29G) in a clinical Achromobacter strain that occurred during the course of chronic respiratory tract…

0301 basic medicineAchromobacterCefepime030106 microbiologyPopulationAchromobacterMicrobial Sensitivity TestsBiologymedicine.disease_causeMicrobiology03 medical and health scienceschemistry.chemical_compoundAntibiotic resistanceBacterial ProteinsMechanisms of ResistanceDrug Resistance Multiple BacterialTobramycinmedicineHumansPharmacology (medical)TetRAmino Acid Sequence[SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry Molecular Biology/Biochemistry [q-bio.BM]educationComputingMilieux_MISCELLANEOUSPharmacologyeducation.field_of_studyPseudomonas aeruginosaMembrane Transport Proteins[SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry Molecular Biology/Molecular biologyGene Expression Regulation Bacterialbiology.organism_classification[SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/BacteriologyAnti-Bacterial Agents3. Good healthInfectious DiseasesAmino Acid SubstitutionchemistryPseudomonas aeruginosaTobramycinTrans-ActivatorsEffluxGene DeletionBacterial Outer Membrane Proteinsmedicine.drugAntimicrobial Agents and Chemotherapy
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