Mycoplasma synoviae lipid-associated membrane proteins identification and expression changes when exposed to chicken
Duoduo Si1, Jialin Sun1, Lei Guo2
1College of Animal Science and Technology, Clinical Veterinary Laboratory, Ningxia University, Yinchuan, China.
Abstract:
Mycoplasma synoviae is a significant cause of respiratory disease and synovitis among chickens, and has an adverse economic impact on broiler breeding efforts. The present study was designed to develop a systematic understanding of the role that M. synoviae lipid-associated membrane proteins (LAMPs) may play in the virulence of this pathogen. Bioinformatics tools were used to identify 146 predicted membrane proteins and lipoproteins in the M. synoviae proteome. Then, Triton X-114 was used to extract LAMPs that were subsequently identified via LC-MS/MS. This approach enabled the detection of potential LAMPs, and the top 200 most abundant proteins detected using this strategy were subject to further analysis. M. synoviae cells (100 MOI) were exposed to chicken fibroblasts (DF-1) and macrophages (HD-11) in a 1:1 mixed culture. Analysis of LAMP transcripts identified 72 up-regulated LAMP genes which were analyzed in depth by bioinformatics. GO analysis revealed these genes to be enriched in the nucleotide binding, sulfur amino acid transmembrane transporter activity, tRNA binding, rRNA modification, and transition metal ion transport pathways. Moreover, KEGG enrichment analysis suggested that these genes were enriched in the biosynthesis of secondary metabolites, carbon metabolism, glycolysis/gluconeogenesis, and nitrogen metabolism pathways.
Insights
Mycoplasma synoviae lipid-associated membrane proteins (LAMPs) are crucial for virulence. This study identified 72 upregulated LAMP genes involved in essential metabolic and transport pathways, offering insights into disease mechanisms.
Area of Science:
- Veterinary Microbiology
- Molecular Pathogenesis
- Bioinformatics
Background:
- Mycoplasma synoviae (MS) causes significant economic losses in poultry due to respiratory disease and synovitis.
- Understanding the role of MS lipid-associated membrane proteins (LAMPs) in virulence is critical for developing control strategies.
Purpose of the Study:
- To systematically identify and characterize MS LAMPs involved in the pathogen's virulence.
- To elucidate the functional roles of upregulated LAMP genes during host-pathogen interactions.
Main Methods:
- Bioinformatic analysis of the MS proteome to predict membrane proteins and lipoproteins.
- Triton X-114 extraction and LC-MS/MS identification of LAMPs.
- Transcriptomic analysis of LAMP genes following co-culture with chicken fibroblasts (DF-1) and macrophages (HD-11).
Main Results:
- 146 putative membrane proteins and lipoproteins were identified in the MS proteome.
- 72 LAMP genes were found to be significantly upregulated upon interaction with host cells.
- Bioinformatic analyses revealed enrichment of these genes in nucleotide binding, transmembrane transport, rRNA modification, and key metabolic pathways (e.g., glycolysis, secondary metabolite biosynthesis).
Conclusions:
- MS LAMPs play a significant role in the pathogen's virulence.
- Upregulated LAMP genes are involved in essential cellular processes, including metabolism and transport, contributing to MS pathogenesis.
- These findings provide a foundation for further research into MS virulence factors and potential therapeutic targets.
