Open Access

Comparative proteomic and genomic analyses of Brucella abortus biofilm and planktonic cells

  • Authors:
    • Taishan Tang
    • Guoqiang Chen
    • Aizhen Guo
    • Ye Xu
    • Linli Zhao
    • Mengrui Wang
    • Chengping Lu
    • Yuan Jiang
    • Changyin Zhang
  • View Affiliations

  • Published online on: December 17, 2019     https://doi.org/10.3892/mmr.2019.10888
  • Pages: 731-743
  • Copyright: © Tang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The present study aimed to explore the differences in protein and gene expression of Brucella abortus cultured under biofilm and planktonic conditions. The proteins unique to biofilms and planktonic B. abortus were separated by two‑dimensional (2‑D) electrophoresis and then identified by matrix‑assisted laser desorption/ionization‑tandem time of flight‑mass spectrometry (MALDI‑TOF/TOF‑MS). High‑throughput sequencing and bioinformatic analyses were performed to identify differentially expressed genes between B. abortus cultured under biofilm and planktonic conditions. The proteins and genes identified by proteomic and genomic analyses were further evaluated via western blot and reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR) analyses. 2‑D electrophoresis identified 20 differentially expressed protein spots between biofilms and planktonic cells, which corresponded to 18 individual proteins (12 downregulated and 6 upregulated) after MALDI‑TOF/TOF‑MS analysis, including elongation factor Tu and enolase. RT‑qPCR analysis revealed that all of the 18 genes were downregulated in biofilms compared with planktonic cells. Western blot analysis identified 9 downregulated and 3 upregulated proteins. High‑throughput sequencing and bioinformatic analyses identified 14 function and pathway‑associated genes (e.g., BAbS19_I14970). RT‑qPCR analysis of the 14 genes showed that they were upregulated in biofilm compared with in planktonic state. In conclusion, these differentially expressed genes may play important roles in bacterial defense, colonization, invasion, and virulence.
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February 2020
Volume 21 Issue 2

Print ISSN: 1791-2997
Online ISSN:1791-3004

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APA
Tang, T., Chen, G., Guo, A., Xu, Y., Zhao, L., Wang, M. ... Zhang, C. (2020). Comparative proteomic and genomic analyses of Brucella abortus biofilm and planktonic cells. Molecular Medicine Reports, 21, 731-743. https://doi.org/10.3892/mmr.2019.10888
MLA
Tang, T., Chen, G., Guo, A., Xu, Y., Zhao, L., Wang, M., Lu, C., Jiang, Y., Zhang, C."Comparative proteomic and genomic analyses of Brucella abortus biofilm and planktonic cells". Molecular Medicine Reports 21.2 (2020): 731-743.
Chicago
Tang, T., Chen, G., Guo, A., Xu, Y., Zhao, L., Wang, M., Lu, C., Jiang, Y., Zhang, C."Comparative proteomic and genomic analyses of Brucella abortus biofilm and planktonic cells". Molecular Medicine Reports 21, no. 2 (2020): 731-743. https://doi.org/10.3892/mmr.2019.10888