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A combined application of molecular docking technology and indirect ELISA for the serodiagnosis of bovine tuberculosis

文献类型： 外文期刊

作者： Song, Shengnan 1 ; Zhang, Qian 3 ; Yang, Hang 1 ; Guo, Jia 1 ; Xu, Mingguo 1 ; Yang, Ningning 1 ; Yi, Jihai 1 ; Wang, Zhen 1 ; Chen, Chuangfu 1 ;

作者机构： 1.Shihezi Univ, Coll Anim Sci & Technol, North 4th Rd, Shihezi 832000, Xinjiang, Peoples R China

2.Collaborat Innovat Ctr Prevent & Control High Inc, North 4th Rd, Shihezi 832003, Xinjiang, Peoples R China

3.Xinjiang Acad Agr & Reclamat Sci, State Key Lab Sheep Genet Improvement & Hlth Prod, Shihezi 832003, Peoples R China

4.Agr & Rural Affairs Bur Manas Cty, Changji 832200, Hui Autonomous, Peoples R China

关键词： Bovine tuberculosis; molecular docking; recombinant proteins; toll-like receptor 2; enzyme-linked immunosorbent assay

期刊名称：JOURNAL OF VETERINARY SCIENCE （ 影响因子：1.603； 五年影响因子：1.886 ）

ISSN： 1229-845X

年卷期： 2022 年 23 卷 3 期

页码：

收录情况： SCI

摘要： Background: There is an urgent need to find reliable and rapid bovine tuberculosis (bTB) diagnostics in response to the rising prevalence of bTB worldwide. Toll-like receptor 2 (TLR2) recognizes components of bTB and initiates antigen-presenting cells to mediate humoral immunity. Evaluating the affinity of antigens with TLR2 can form the basis of a new method for the diagnosis of bTB based on humoral immunity. Objectives: To develop a reliable and rapid strategy to improve diagnostic tools for bTB. Methods: In this study, we expressed and purified the sixteen bTB-specific recombinant proteins in Escherichia coli. The two antigenic proteins, MPT70 and MPT83, which were most valuable for serological diagnosis of bTB were screened. Molecular docking technology was used to analyze the affinity of MPT70, MPT83, dominant epitope peptide of MPT70 (M1), and dominant epitope peptide MPT83 (M2) with TLR2, combined with the detection results of enzyme-linked immunosorbent assay to evaluate the molecular docking effect. Results: The results showed that interaction surface Ca-atom root mean square deviation of proteins (M1, M2, MPT70, MPT83)-TLR2 protein are less than 2.5 A, showing a high affinity. It is verified by clinical serum samples that MPT70, MPT83, MPT70-MPT83 showed good diagnostic potential for the detection of anti-bTB IgG and M1, M2 can replace the whole protein as the detection antigen. Conclusions: Molecular docking to evaluate the affinity of bTB protein and TLR2 combined with ELISA provides new insights for the diagnosis of bTB.

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