The identification of antigenic proteins: 14-3-3 protein and propionyl-CoA carboxylase in Clonorchis sinensis

Myoung Ro Lee, Yu Jung Kim, Dae Won Kim, Won Gi Yoo, Shin Hyeong Cho, Kwang Yeon Hwang, Jung Won Ju, Won Ja Lee

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Clonorchis sinensis, the causative agent of clonorchiasis, is widespread in East and Southeast Asia, including China, Vietnam and the Republic of Korea. We identified antigenic proteins from adult C. sinensis liver flukes using immunoproteomic analysis. In this study, we found 23 candidate antigenic proteins with a pI in the range of 5.4-6.2 in total lysates of C. sinensis. The antigenic protein spots reacted against sera from clonorchiasis patients and were identified as cysteine proteases, glutathione transferases, gelsolin, propionyl-CoA carboxylase (PCC), prohibitin and 14-3-3 protein (14-3-3) using LC-coupled ESI-MS/MS and an EST database for C. sinensis. PCC and 14-3-3 were identified for the first time as serological antigens for the diagnosis of C. sinensis. To validate the antigenicity of PCC and 14-3-3, recombinant proteins were immunoblotted with sera from clonorchiasis patients. The structural, functional and immunological characteristics of the putative amino acid sequence were predicted by bioinformatics analysis. Our novel finding will contribute to the development of diagnostics for clonorchiasis. These results suggest that immunoproteomic approaches are valuable tools to identify antigens that could be used as targets for effective parasitic infection control strategies.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalMolecular and Biochemical Parasitology
Issue number1-2
Publication statusPublished - 2012 Mar


  • Antigen
  • Clonorchis sinensis
  • Two-dimensional gel electrophoresis

ASJC Scopus subject areas

  • Parasitology
  • Molecular Biology


Dive into the research topics of 'The identification of antigenic proteins: 14-3-3 protein and propionyl-CoA carboxylase in Clonorchis sinensis'. Together they form a unique fingerprint.

Cite this