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Abstract

Predator-prey interactions play important roles in the cycling of marine organic matter. Here we show that a Gram-negative bacterium isolated from marine sediments (Pseudoalteromonas sp. strain CF6-2) can kill Gram-positive bacteria of diverse peptidoglycan (PG) chemotypes by secreting the metalloprotease pseudoalterin. Secretion of the enzyme requires a Type II secretion system. Pseudoalterin binds to the glycan strands of Gram positive bacterial PG and degrades the PG peptide chains, leading to cell death. The released nutrients, including PG-derived D-amino acids, can then be utilized by strain CF6-2 for growth. Pseudoalterin synthesis is induced by PG degradation products such as glycine and glycine-rich oligopeptides. Genes encoding putative pseudoalterin-like proteins are found in many other marine bacteria. This study reveals a new microbial interaction in the ocean.

Item Type:	Article
Authors/Creators:	Tang, B-L and Yang, J and Chen, X-L and Wang, P and Zhao, H-L and Su, H-N and Li, C-Y and Yu, Y and Zhong, S and Wang, L and Lidbury, I and Ding, H and Wang, M and McMinn, A and Zhang, X-Y and Chen, Y and Zhang, Y-Z
Keywords:	predator, prey, Pseudoalteromonas
Journal or Publication Title:	Nature Communications
Publisher:	Nature Publishing Group
ISSN:	2041-1723
DOI / ID Number:	https://doi.org/10.1038/s41467-019-14133-x
Copyright Information:	Copyright 2020 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
Related URLs:	Google Scholar: McMinn, A UTAS Profile: McMinn, A
Item Statistics:	View statistics for this item

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