Cell aggregation is negatively regulated by N-acylhomoserine lactone-mediated quorum sensing in Pantoea ananatis SK-1(MICROBIAL PHYSIOLOGY AND BIOTECHNOLOGY)

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概要

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• Pantoea ananatis SK-1 produces N-acylhomoserine lactones (AHLs) and regulates expression of some virulence factors through AHL-mediated quorum sensing. In this study, we discovered that the strain SK-021, which has a disrupted AHL-synthetic gene, showed constitutive cell aggregation. SK-1 has the ability to aggregate, and cell aggregation inhibitory factors are expressed under control of AHL-mediated quorum sensing. One of the transposon mutants, SK-33M, constitutively aggregates without defective AHL production. A homology search revealed that the transposon integration site was located in the adhesin-like yeeJ gene. Based on RT-PCR analysis, transcription of yeeJ is regulated by AHL-mediated quorum sensing. However, because both the wild-type and SK-33M strains induced necrotic symptoms in onion leaves, we conclude that the yeeJ gene is not involved in the pathogenicity of SK-1.

著者

• Ogata Yuji

  Department Of Internal Medicine Division Of Metabolism And Endocrinology St. Marianna University Sch

• Ikeda Tsukasa

  Department Of Applied Chemistry Utsunomiya University

• Morohoshi Tomohiro

  Department Of Material And Environmental Chemistry Graduate School Of Engineering Utsunomiya Univers

• Morohoshi Tomohiro

  Department Of Material And Environmental Chemistry Graduate School Of Engineering Utsunomiya Univers

• Ogata Yuji

  Department Of Material And Environmental Chemistry Graduate School Of Engineering Utsunomiya Univers

• Ikeda Tsukasa

  Department Of Material And Environmental Chemistry Graduate School Of Engineering Utsunomiya Univers

• MOROHOSHI TOMOHIRO

  Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University

• Ogata Yuji

  Department of Chemistry, Tokyo Institute of Technology

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