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Proteomic data of Listeria monocytogenes

ABSTRACT: Listeria monocytogenes is an important food-borne pathogen that is responsible for contamination of a variety of food products. It causes listeriosis which is one of the most severe and serious diseases whose symptoms might include nausea and diarrhea. Also because of its ability to adhere to industrials’ surfaces, it is difficult for them to come up against this danger. Although there are researches in L. monocytogenes proteome, most of them are based on the study of a single strain, yet little is known about the proteome of more of the microbe’s strains. By studying the proteome of the microorganism with state-of-the-art mass spectrometry technology in terms of proteomics, we will be able to have an overall picture of the pathogenicity of the bacterium, as this is largely based on its ability to adapt to certain environments and to project its toxicity in them. To address that we provide a dataset of 2227 different proteins from 4 strains of L. monocytogenes, grouped by their molecular function and their biological process. The identified proteins confirm the complex molecular mechanisms of the bacterium.

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ORGANISM(S): Listeria Monocytogenes Egd-e

SUBMITTER: Panagiotis Skandamis

LAB HEAD: Dr. Panagiotis Skandamis

PROVIDER: PXD075511 | Pride | 2026-04-07

REPOSITORIES: Pride

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Project description:The phenotypic and gene expression traits conferred by the alternative sigma factor protein M-OM-^CL in the food-borne pathogen L. monocytogenes were investigated. M-OM-^CL was shown to be important for the efficient growth of this pathogen exposed to food preservative measures such as low storage temperatures, elevated osmolarity and acidity. Based on high throughput phenotypic analysis, M-OM-^CL function was also found to be protective in L. monocytogenes EGDe cells exposed to several antimicrobial compounds including some of the antibiotics currently applied in listeriosis treatment. The expression of flagella genes and motility were significantly compromized upon loss of M-OM-^CL function. A comparative transcriptome analysis of exponential growth EGDe wild type and sigL null cells unveiled 394 genes that are positively controlled through M-OM-^CL dependent transcriptional regulation mechanisms in this bacterium during growth at low (3M-BM-0C) and optimized (37M-BM-0C) temperature conditions. Genes identified indicate that M-OM-^CL is a pleitropic transcription regulator mediating positive expression control of genes involved in diverse cellular processes including protein synthesis, molecular transport, energy metabolism, respiration, transcription regulation, metabolite biosynthesis, and cell envelope composition modification. Overall our observations have revealed that the loss of M-OM-^CL function leads to extensive gene expression defects in L. monocytogenes EGDe cells, and these are consistent with compromized nutrient assimilation, energy metabolism, protein synthesis, and metabolite biosynthesis processes as well as altered cell envelope composition and motility. Numerous gene expression changes imposed by M-OM-^CL loss in EGDe are thus also consistent with pleiotropic phenotypic defects detected in the L. monocytogenes EGDe M-bM-^HM-^FsigL strain. Gene expression DNA-microarray. Two-color hybridizations on 8*15K Agilent arrays. Wild type and three KO mutants in three temperatures, three biological replicates in each condition.

			Action	DRS
	Key.xlsx	Xlsx
	Listeria_monocytogenes_Results.tsv	Tabular
	Listeriamonocytogenes.7z	Other
	checksum.txt	Txt

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Proteomic data of Listeria monocytogenes

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