A new member of the tripartite multidrug efflux pumps, MexVW-OprM, in Pseudomonas aeruginosa

Yang Li, Takehiko Mima, Yukiko Komori, Yuji Morita, Teruo Kuroda, Tohru Mizushima, Tomofusa Tsuchiya

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

Objectives: Multidrug efflux pumps are thought to be involved in mediating multidrug resistance in Pseudomonas aeruginosa. Here we aim to characterize hitherto uncharacterized multidrug efflux pumps from P. aeruginosa. Materials and methods: We isolated a mutant, YM442, which showed elevated resistance to several antimicrobial agents from P. aeruginosa YM44 lacking four major multidrug efflux pumps, MexAB, MexCD-OprJ, MexEF-OprN and MexXY. We cloned genes responsible for the resistance from chromosomal DNA of YM442 using YM44 as host. Results: We designated the genes mexVW. Introduction of a recombinant plasmid pTAJ2 carrying the mexVW into YM44 cells conferred resistance to fluoroquinolones, tetracycline, chloramphenicol, erythromycin, ethidium bromide and acriflavine. Elevated ethidium bromide extrusion was observed with cells of YM442 and of YM44/pTAJ2. An outer membrane protein OprM was able to cooperate with MexVW. Elevated expression of the mexV gene was observed with YM442 compared with YM44. Conclusions: MexV (membrane fusion protein)-MexW (RND-type membrane protein)-OprM is a tripartite multidrug efflux pump. It is suggested that other outer membrane component(s) could cooperate with MexVW.

Original languageEnglish
Pages (from-to)572-575
Number of pages4
JournalJournal of Antimicrobial Chemotherapy
Volume52
Issue number4
DOIs
Publication statusPublished - 2003 Oct 1
Externally publishedYes

Fingerprint

Pseudomonas aeruginosa
Ethidium
Membrane Proteins
Membrane Fusion Proteins
Acriflavine
Fluoroquinolones
Multiple Drug Resistance
Chloramphenicol
Erythromycin
Anti-Infective Agents
Tetracycline
Genes
Plasmids
Gene Expression
Membranes
DNA

Keywords

  • MexVW
  • Multidrug efflux pump
  • P. aeruginosa
  • RND-type

ASJC Scopus subject areas

  • Pharmacology
  • Microbiology

Cite this

Li, Y., Mima, T., Komori, Y., Morita, Y., Kuroda, T., Mizushima, T., & Tsuchiya, T. (2003). A new member of the tripartite multidrug efflux pumps, MexVW-OprM, in Pseudomonas aeruginosa. Journal of Antimicrobial Chemotherapy, 52(4), 572-575. https://doi.org/10.1093/jac/dkg390

A new member of the tripartite multidrug efflux pumps, MexVW-OprM, in Pseudomonas aeruginosa. / Li, Yang; Mima, Takehiko; Komori, Yukiko; Morita, Yuji; Kuroda, Teruo; Mizushima, Tohru; Tsuchiya, Tomofusa.

In: Journal of Antimicrobial Chemotherapy, Vol. 52, No. 4, 01.10.2003, p. 572-575.

Research output: Contribution to journalArticle

Li, Y, Mima, T, Komori, Y, Morita, Y, Kuroda, T, Mizushima, T & Tsuchiya, T 2003, 'A new member of the tripartite multidrug efflux pumps, MexVW-OprM, in Pseudomonas aeruginosa', Journal of Antimicrobial Chemotherapy, vol. 52, no. 4, pp. 572-575. https://doi.org/10.1093/jac/dkg390
Li, Yang ; Mima, Takehiko ; Komori, Yukiko ; Morita, Yuji ; Kuroda, Teruo ; Mizushima, Tohru ; Tsuchiya, Tomofusa. / A new member of the tripartite multidrug efflux pumps, MexVW-OprM, in Pseudomonas aeruginosa. In: Journal of Antimicrobial Chemotherapy. 2003 ; Vol. 52, No. 4. pp. 572-575.
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AU - Tsuchiya, Tomofusa

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