Open AccessInsights into Detoxification of Tolaasins, the Toxins Behind Mushroom Bacterial Blotch, by Microbacterium foliorum NBRC 103072T
Author(s) -
Shun Tomita,
Akinobu Kajikawa,
Shizunobu Igimi,
Hirosuke Shinohara,
Kenji Yokota
Publication year - 2021
Publication title -
phytofrontiers
Language(s) - English
Resource type - Journals
ISSN - 2690-5442
DOI - 10.1094/phytofr-10-20-0024-r
Subject(s) - microbiology and biotechnology , detoxification (alternative medicine) , bacteria , mushroom , biology , chemistry , food science , medicine , genetics , alternative medicine , pathology
Tolaasins are lipodepsipeptides secreted by Pseudomonas tolaasii, the causal agent of brown blotch disease of mushroom, and are the toxins that cause the brown spots. We previously reported that Microbacterium foliorum NBRC 103072 T is an effective tolaasin-detoxifying bacterium. In this study, we aimed to characterize the tolaasin-detoxification process of M. foliorum NBRC 103072 T . The tolaasin detoxification by M. foliorum NBRC 103072 T was carried out by hydrolyzation of tolaasins at two specific sites in the peptide moiety of tolaasins by its cells, and the resulting fragments were released from bacterial cells. The tolaasin-hydrolyzing activity can be extracted by a neutral detergent solution from M. foliorum NBRC 103072 T cells. Moreover, tolaasin adsorption to the bacterial cells occurred prior to hydrolyzation of tolaasins, which might contribute to the effective tolaasin detoxification by M. foliorum NBRC 103072 T . It is notable that the tolaasin-degradation process by M. foliorum NBRC 103072 T is carried out by hydrolyzation at specific sites in the peptide moiety of lipopeptide by bacterial cells as a novel biological degradation process of cyclic lipopeptides. [Formula: see text] Copyright © 2021 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license .