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A predator-prey interaction between a marine Pseudoalteromonas sp. and Gram-positive bacteria

Tang, B-L, Yang, J, Chen, X-L, Wang, P, Zhao, H-L, Su, H-N, Li, C-Y, Yu, Y, Zhong, S, Wang, L, Lidbury, I, Ding, H, Wang, M, McMinn, A ORCID: 0000-0002-2133-3854, Zhang, X-Y, Chen, Y and Zhang, Y-Z 2020 , 'A predator-prey interaction between a marine Pseudoalteromonas sp. and Gram-positive bacteria' , Nature Communications, vol. 11, no. 1 , pp. 1-14 , doi:

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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:
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Copyright 2020 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

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