한국발생생물학회지:발생과생식 (Development and Reproduction)

  • 제25권4호
  • /
  • Pages.225-234
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  • 2021
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  • 2465-9525(pISSN)
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  • 2465-9541(eISSN)
한국발생생물학회 (The Korean Society of Developmental Biology)
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Cell-Surface Loss of Constitutive Activating and Inactivating Mutants of Eel Luteinizing Hormone Receptors

  • Byambaragchaa, Munkhzaya (Institute of Genetic Engineering, Hankyong National University) ;
  • Choi, Seung-Hee (School of Animal Life Convergence Science, Hankyong National University) ;
  • Kim, Dong-Wan (Institute of Genetic Engineering, Hankyong National University) ;
  • Min, Kwan-Sik (Institute of Genetic Engineering, Hankyong National University)
  • 투고 : 2021.08.21
  • 심사 : 2021.12.11
  • 발행 : 2021.12.31
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초록

The present study aimed to investigate the mechanism of cell surface receptor loss by two constitutively activating mutants (designated L469R, and D590Y) and two inactivating mutants (D417N and Y558F) of the luteinizing hormone receptor (LHR) in the Japanese eel Anguilla japonica, known to naturally occur in human LHR transmembrane domains. We investigated cell surface receptor loss using an enzyme-linked immunosorbent assay in HEK 293 cells. The expression level of wild-type eel LHR was considered to be 100%, and the expression levels of L469R and D417N were 97% and 101%, respectively, whereas the expression levels of D590Y and Y558F slightly increased to approximately 110% and 106%, respectively. The constitutively activating mutants L469R and D590Y exhibited a decrease in cell surface loss in a manner similar to that of wild-type eel LHR. The rates of loss of cell surface agonist-receptor complexes were observed to be very rapid (2.6-6.2 min) in both the wild-type eel LHR and activating mutants. However, cell surface receptor loss in the cells expressing inactivating mutants D417N and Y558F was slightly observed in the cells expressing inactivating mutants D417N and Y558F, despite treatment with a high concentration of agonist. These results provide important information on LHR function in fish and the regulation of mutations of highly conserved amino acids in glycoprotein hormone receptors.

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참고문헌

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