The enhancement of the human immunoglobulin G Fc fragment-binding activity of Mycoplasma salivarium cells by trypsin treatment is ascribed to the binding of trypsin to the Fc fragment

Yoshihiko Sawa, Ken ichiro Shibata, Tsuguo Watanabe

Research output: Contribution to journalArticle


Human immunoglobulin G Fc fragment-binding activity of Mycoplasma salivarium cells was remarkably enhanced by trypsin treatment of the cells. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis profile of proteins of the cells treated wtrypsin was the same as that of the cells treated with pronase, although pronase treatment had been shown to reduce the activity in our previous study (FEMS Microbiol. Lett. 123, 305-310, 1994). This contradiction was clarified by the finding that trypsin bound the Fc fragment more strongly than the cells, and a small amount of trypsin remained in the cells treated with trypsin and washed well. On the basis of these results, it was concluded that the enhancement of cell activity by trypsin treatment was ascribed to binding of the Fc fragment to trypsin remaining in the trypsin-treated cells.

Original languageEnglish
Pages (from-to)9-13
Number of pages5
JournalFEMS Microbiology Letters
Issue number1
Publication statusPublished - Apr 15 1995
Externally publishedYes



  • Fc fragment-binding activity
  • Mycoplasma salivarium
  • Trypsin

ASJC Scopus subject areas

  • Microbiology
  • Molecular Biology
  • Genetics

Cite this