China Animal Husbandry and Veterinary Medicine ›› 2024, Vol. 51 ›› Issue (10): 4476-4484.doi: 10.16431/j.cnki.1671-7236.2024.10.028

• Preventive Veterinary Medicine • Previous Articles    

Study on the Interaction Between Chicken Interferon γ and Complement Receptor 2 Protein

IN Huan1, MENG Zhaoying2, TU Min1, SHEN Jia1, SHI Aihua1, ZHAO Lei1, XI Shuo1, ZHANGJianwei1, ZHANG Zhenhua1   

  1. 1. Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China;
    2. Animal Science and Technology College, Beijing University of Agriculture, Beijing 102206, China
  • Received:2024-03-15 Published:2024-09-30

Abstract: 【Objective】 The experiment was to study the interaction between chicken interferon γ (chIFN-γ) and chicken complement receptor 2 (chCR2) proteins,and lay a foundation for the research of new functions of chIFN-γ and chCR2.【Method】 chIFN-γ related expression plasmid was constructed by homologous recombination method. The interaction between chIFN-γ and chCR2 proteins was identified by co-immunoprecipitation,laser confocal and surface plasmon resonance techniques,and the interaction mode of chIFN-γ and chCR2 proteins was simulated by molecular docking.【Result】 The pCMV-Myc-chIFN-γ expression plasmid was constructed successfully. The plasmid of pCMV-Myc-chIFN-γ and pCMV-HA-chCR2-ΔTM were co-transfected into HEK-293FT cells and the results showed that chIFN-γ could interact with chCR2. The plasmid of pCMV-Myc-chIFN-γ and pCMV-HA-chCR2-ΔTM were co-transfected into DF-1 cells and the results showed that chIFN-γ and chCR2 proteins could co-locate in DF-1 cells. The results of surface plasmon resonance test showed that the equilibrium dissociation constant (KD) between chIFN-γ and chCR2 proteins was 0.362 μmol/L,and the affinity between the two proteins was high. The results of molecular docking experiments showed that the interaction between chIFN-γ and chCR2 proteins was 1 salt bridge between Asp23-His150 and 3 sets of hydrogen bonds between Asn37-Ser143,Glu57-Gly179 and Ile93-Tyr184.【Conclusion】 The results of this study proved that chIFN-γ and chCR2 proteins could interact,and the interaction mode between them was 1 salt bridge and 3 sets of hydrogen bonds.

Key words: chicken interferon γ (chIFN-γ); chicken complement receptor 2 (chCR2); interaction; affinity

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