Novel Toluene Elimination System in a Toluene-tolerant Microorganism

Overview

Journal J Bacteriol

Publisher American Society for Microbiology

Specialty Microbiology

Date 2000 Oct 29

PMID 11053390

Citations 31

Authors

H Kobayashi

K Uematsu

H Hirayama

K Horikoshi

Affiliations

Soon will be listed here.

Abstract

In studies of Pseudomonas putida IH-2000, a toluene-tolerant microorganism, membrane vesicles (MVs) were found to be released from the outer membrane when toluene was added to the culture. These MVs were found to be composed of phospholipids, lipopolysaccharides (LPS), and very low amounts of outer membrane proteins. The MVs also contained a higher concentration of toluene molecules (0.172 +/- 0. 012 mol/mol of lipid) than that found in the cell membrane. In contrast to the wild-type strain, the toluene-sensitive mutant strain 32, which differs from the parent strain in LPS and outer membrane proteins, did not release MVs from the outer membrane. The toluene molecules adhering to the outer membrane are eliminated by the shedding of MVs, and this system appears to serve as an important part of the toluene tolerance system of IH-2000.

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