Abstract
This study analyzed the difference between biofilm and planktonic Brucella abortus using metabolomics and proteomics. Brucella abortus was cultured in different media to induce Brucella abortus biofilm formation and planktonic cells, followed by metabolomics and proteomics analyses for these two samples. Significant differential metabolites were identified, followed by KEGG pathway analysis. Differentially expressed proteins were identified, followed by subcellular localization, GO annotation, and KEGG pathway enrichment. Additionally, a correlation analysis of metabolomics and proteomics was performed. Metabolomics analysis showed 7682 positive and 4433 negative metabolites, including 188 positive and 117 negative significant differential metabolites. These differential metabolites were enriched in fatty acid/unsaturated fatty acid biosynthesis and linoleic acid metabolism. Proteomics analysis revealed 1759 proteins, including 486 differentially expressed proteins, which were enriched in various metabolic and degradation-related pathways. Subcellular localization showed that 74.3% of the differential proteins were cytoplasmic proteins. Correlation analysis showed that 1-palmitoyl-2-oleoyl-phosphatidylglycerol had the most significant correlations with proteins, followed by cytosine. Both metabolites correlated with the protein Q57EI7 (RbsB-1, ribose ABC transporter). One common pathway, fatty acid biosynthesis, was identified by both proteomics and metabolomics analyses that involved the metabolites, oleic acid, and protein Q57DK3 (biotin carboxylase). There were metabolomic and proteomic differences between Brucella abortus biofilm and planktonic cells, and these results provide novel insights into the biofilm-forming process of Brucella abortus.
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Not applicable. This study was only the primary research, and further studies are in progress.
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This study was supported by the National Natural Science Foundation of China (No. 31702278), the Fundamental Research Funds for the Central Universities (No. KYDS201801, KJQN201826), the Science Foundation of General Administration of Customs of the People’s Republic of China (No. 2019HK018), and the Science Foundation of General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China (No. 2008IK004). The role of funders is financially supporting this study.
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Tang and Lu conceived and designed the research, and Ye Xu and Jianfeng Wang participated in the acquisition of data. Xiao Tan and Xiaona Zhao analyzed and interpreted the data. Zhou and Fande Kong participated in the design of the study and performed the statistical analyses. Changqing Zhu and Huixing Lin conceived the study and participated in its design and coordination; Taishan Tang and Chengping Lu drafted the manuscript and revised the manuscript for important intellectual content. All authors read and approved the final manuscript.
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Supplementary Figure 1
Correlation analysis of the differentially expressed metabolites in biofilm and planktonic stage (PNG 535 kb)
Table S1.
Identification of metabolites at positive mode. (XLSX 2493 kb)
Table S2.
Identification of metabolites at negative mode. (XLSX 1100 kb)
Table S3.
Results for proteins identification. (XLSX 333 kb)
Table S4.
Results for subcellular localization. (XLSX 16 kb)
Table S5.
The significant metabolite-protein interaction pairs in Pearson correlation analysis. (XLS 28 kb)
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Tang, T., Xu, Y., Wang, J. et al. Evaluation of the differences between biofilm and planktonic Brucella abortus via metabolomics and proteomics. Funct Integr Genomics 21, 421–433 (2021). https://doi.org/10.1007/s10142-021-00788-7
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DOI: https://doi.org/10.1007/s10142-021-00788-7