Abstract
Tetrahymenosis is caused by the ciliated protozoan Tetrahymena and is responsible for serious economic losses to the aquaculture industry worldwide. However, information regarding the molecular mechanism leading to tetrahymenosis is limited. In previous transcriptome sequencing work, it was found that one of the two β-tubulin genes in T. pyriformis was significantly expressed in infected fish, we speculated that β-tubulin is involved in T. pyriformis infecting fish. Herein, the potential biological function of the β-tubulin gene in Tetrahymena species when establishing infection in guppies was investigated by cloning the full-length cDNA of this T. pyriformis β-tubulin (BTU1) gene. The full-length cDNA of T. pyriformis BTU1 gene was 1873 bp, and the ORF occupied 1134 bp, whereas 5′ UTR 434 bp, and 3′ UTR 305 bp whose poly (A) tail contained 12 bases. The predicted protein encoded by T. pyriformis BTU1 gene had a calculated molecular weight of 42.26 kDa and pI of 4.48. Moreover, secondary structure analysis and tertiary structure prediction of BTU1 protein were also conducted. In addition, morphology, infraciliature, phylogeny, and histopathology of T. pyriformis isolated from guppies from a fish market in Harbin were also investigated. Furthermore, qRT-PCR analysis and experimental infection assays indicated that the expression of BTU1 gene resulted in efficient cell proliferation during infection. Collectively, our data revealed that BTU1 is a key gene involved in T. pyriformis infection in guppies, and the findings discussed herein provide valuable insights for future studies on tetrahymenosis.
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Acknowledgements
Many thanks are given to the student of Harbin Normal University, Wenyu Li, for her help on details of experiment. We would like to thank TopEdit (www.topeditsci.com) for English language editing of this manuscript.
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This work was supported by the Natural Science Foundation of China (project numbers: 31970498).
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MJ: conceptualization, methodology, and writing—original draft preparation; CZ, SW, LL, and SZ: data curation, visualization, and investigation. LW: supervision. XP: writing—reviewing and editing.
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Jiang, M., Zhou, C., Wang, S. et al. Identification of a Tetrahymena species infecting guppies, pathology, and expression of beta-tubulin during infection. Parasitol Res 123, 104 (2024). https://doi.org/10.1007/s00436-024-08117-0
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DOI: https://doi.org/10.1007/s00436-024-08117-0