Dataset Information

Adaptation of Lacticaseibacillus rhamnosus CM MSU 529 to aerobic and respiratory growth: a proteomic approach

ABSTRACT: Lacticaseibacillus rhamnosus CM MSU 529 is the O2-tolerant facultative homofermentative lactic acid bacteria realizing respiratory metabolism when grown in a supplemented with hemin and vitamin K2 nutrient medium. This study describes the effect of aerobic and respiratory conditions on biomass and proteome of strain CM MSU 529 grown in a batch culture. Aeration caused the induction of the biosynthesis of 43 proteins, while 14 proteins were down-regulated as detected by label-free LC-MS/MS. Up-regulated proteins are involved in oxygen consumption (Pox, LctO, pyridoxine 5'-phosphate oxidase), xylulose-5-phosphate conversion (Xfp), pyruvate metabolism (PdhD, AlsS, AlsD), reactive oxygen species (ROS) elimination (Tpx, TrxA, Npx), general stress response (GroES, PfpI, universal stress protein, YqiG), antioxidant production (CysK, DkgA), pyrimidine metabolism (CarA, CarB, PyrE, PyrC, PyrB, PyrR), oligopeptide transport and metabolism (OppA, PepO), maturation and stability of ribosomal subunits (RbfA, VicX). Down-regulated proteins participate in ROS defense (AhpC), citrate and pyruvate consumption (CitE, PflB), oxaloacetate production (AvtA), arginine synthesis (ArgG), amino acid transport (GlnQ), and deoxy-nucleoside biosynthesis (RtpR). Overproduction of purine biosynthesis enzyme (PurE) distinguished cells grown under respiratory conditions from cells grown under aerobiosis. The data obtained shed light on mechanisms providing O2-tolerance and adaptation to aerobic/respiratory conditions in strain CM MSU 529.

INSTRUMENT(S): Orbitrap Exploris 480

ORGANISM(S): Lacticaseibacillus Rhamnosus Lrhmdp2

TISSUE(S): Monocyte, Cell Culture

SUBMITTER: Joerg Kahnt

LAB HEAD: Timo Glatter

PROVIDER: PXD038847 | Pride | 2023-03-11

REPOSITORIES: Pride

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Adaptation of <i>Lacticaseibacillus rhamnosus</i> CM MSU 529 to Aerobic Growth: A Proteomic Approach.

Dinarieva Tatiana Yu TY Klimko Alena I AI Kahnt Jörg J Cherdyntseva Tatiana A TA Netrusov Alexander I AI

Microorganisms 20230125 2

The study describes the effect of aerobic conditions on the proteome of homofermentative lactic acid bacterium <i>Lacticaseibacillus rhamnosus</i> CM MSU 529 grown in a batch culture. Aeration caused the induction of the biosynthesis of 43 proteins, while 14 proteins were downregulated as detected by label-free LC-MS/MS. Upregulated proteins are involved in oxygen consumption (Pox, LctO, pyridoxine 5'-phosphate oxidase), xylulose 5-phosphate conversion (Xfp), pyruvate metabolism (PdhD, AlsS, Als ...[more]

PMID: 36838278

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Project description:Actinobacillus pleuropneumoniae is an important porcine respiratory pathogen causing great economic losses in the pig industry worldwide. Oxygen deprivation is a stress that A. pleuropneumoniae will encounter during both early infection and the later, persistent stage. To understand modulation of A. pleuropneumoniae gene expression in response to the stress caused by anaerobic conditions, gene expression profiles under anaerobic and aerobic conditions were compared in this study. The microarray results showed that 631 genes (27.7% of the total ORFs) were differentially expressed in anaerobic conditions. Many genes encoding proteins involved in glycolysis, carbon source uptake systems, pyruvate metabolism, fermentation and the electron respiration transport chain were up-regulated. These changes led to an increased amount of pyruvate, lactate, ethanol and acetate in the bacterial cells as confirmed by metabolite detection. Genes encoding proteins involved in cell surface structures, especially biofilm formation, peptidoglycan biosynthesis and lipopolysaccharide biosynthesis were up-regulated as well. Biofilm formation was significantly enhanced under anaerobic conditions. These results indicate that induction of central metabolism is important for basic survival of A. pleuropneumoniae after a shift to an anaerobic environment. Enhanced biofilm formation may contribute to the persistence of this pathogen in the damaged anaerobic host tissue and also in the early colonization stage. These discoveries give new insights into adaptation mechanisms of A. pleuropneumoniae in response to environmental stress. Transcriptional profiles were analyzed using microarray to compare the gene expressions of A. pleuropneumoniae cultured under aerobic and anaerobic condition. The bacteria was cultured under aerobic condition to mid-log phase (3 hours) and then divided into two separate groups, one group was continually cultured under aerobic condition for 1 hour (OD600nm = 0.417 M-BM-1 0.008) and the other group was cultured under anaerobic condition for 1 hour (OD600nm = 0.333 M-BM-1 0.015). Three independent biological replicates were performed. The total RNA were extracted and hybridized with the whole genome microarray of A. pleuropneumoniae. The signal intensities were normalized and transformed into log2 values. The genes with P-value < 0.05 were selected as differentially expressed genes.

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