Journal of Microbiology and Biotechnology

  • 제26권12호
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  • Pages.2184-2191
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  • 2016
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  • 1017-7825(pISSN)
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  • 1738-8872(eISSN)
한국미생물·생명공학회 (The Korean Society for Microbiology and Biotechnology)
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A Combination Strategy for Construction of Peptide-β2m-H-2Kb Single Chain with Overlap Extension PCR and One-Step Cloning

  • Xu, Tao (Department of Microbiology and Immunology, Medical School, Southeast University) ;
  • Li, Xiaoe (Department of Microbiology and Immunology, Medical School, Southeast University) ;
  • Wu, You (Department of Microbiology and Immunology, Medical School, Southeast University) ;
  • Shahzad, Khawar Ali (Department of Microbiology and Immunology, Medical School, Southeast University) ;
  • Wang, Wei (Department of Microbiology and Immunology, Medical School, Southeast University) ;
  • Zhang, Lei (Department of Microbiology and Immunology, Medical School, Southeast University) ;
  • Shen, Chuanlai (Department of Microbiology and Immunology, Medical School, Southeast University)
  • 투고 : 2016.06.16
  • 심사 : 2016.08.25
  • 발행 : 2016.12.28
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초록

The time-consuming and high-cost preparation of soluble peptide-major histocompatibility complexes (pMHC) currently limits their wide uses in monitoring antigen-specific T cells. The single-chain trimer (SCT) of peptide-${\beta}2m$-MHC class I heavy chain was developed as an alternative strategy, but its gene fusion is hindered in many cases owing to the incompatibility between the multiple restriction enzymes and the restriction endonuclease sites of plasmid vectors. In this study, overlap extension PCR and one-step cloning were adopted to overcome this restriction. The SCT gene of the $OVA_{257-264}$ peptide-$(GS_4)_3-{\beta}2m-(GS_4)_4-H-2K^b$ heavy chain was constructed and inserted into plasmid pET28a by overlap extension PCR and one-step cloning, without the requirement of restriction enzymes. The SCT protein was expressed in Escherichia coli, and then purified and refolded. The resulting $H-2K^b/OVA_{257-264}$ complex showed the correct structural conformation and capability to bind with $OVA_{257-264}$-specific T-cell receptor. The overlap extension PCR and one-step cloning ensure the construction of single-chain MHC class I molecules associated with random epitopes, and will facilitate the preparation of soluble pMHC multimers.

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참고문헌

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피인용 문헌

  1. Frequency and reactivity of antigen-specific T cells were concurrently measured through the combination of artificial antigen-presenting cell, MACS and ELISPOT vol.7, pp.None, 2016, https://doi.org/10.1038/s41598-017-16549-1
  2. A Combinatorial in-silico, in-vitro and in-vivo Approach to Quantitatively Study Peptide Induced MHC Stability vol.11, pp.24, 2016, https://doi.org/10.21769/bioprotoc.4255