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Environ Microbiol Rep. 2019 Sep 10. doi: 10.1111/1758-2229.12793. [Epub ahead of print]

Metabolite profiling of the cold adaptation of Pseudomonas putida KT2440 and cold-sensitive mutants.

Author information

1
Clinical Research Group, 'Molecular Pathology of Cystic Fibrosis and Pseudomonas Genomics', Hannover Medical School, 30625, Hannover, Germany.
2
Department of Biochemistry and Bioinformatics, Institute for Biochemistry & Biotechnology, Technische Universität Braunschweig, 38106, Braunschweig, Germany.
3
Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg.
4
Clinic for Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, 30625, Hannover, Germany.
5
Biomedical Research in Endstage and ObstructiveLung Disease (BREATH), Member of the GermanCenter for Lung Research, Hannover, Germany.

Abstract

Free-living bacteria such as Pseudomonas putida are frequently exposed to temperature shifts and non-optimal growth conditions. We compared the transcriptome and metabolome of the cold adaptation of Pseudomonas putida KT2440 and isogenic cold-sensitive transposon mutants carrying transposons in their cbrA, cbrB, pcnB, vacB and bipA genes. P. putida changes the mRNA expression of about 43% of all annotated ORFs during this initial phase of cold adaptation, but only a small number of six to 93 genes were differentially expressed at 10°C between wild type strain and the individual mutants. The spectrum of metabolites underwent major changes during cold adaptation particularly in the mutants. Both KT2440 strain and the mutants increased the levels of the most abundant sugars and amino acids which were more pronounced in the cold-sensitive mutants. All mutants depleted their pools for core metabolites of aromatic and sugar metabolism, but increased their pool of polar amino acids which should be advantageous to cope with the cold stress. This article is protected by copyright. All rights reserved.

PMID:
31503400
DOI:
10.1111/1758-2229.12793

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