EndoSd: An IgG glycan hydrolyzing enzyme in Streptococcus dysgalactiae subspecies dysgalactiae

Azadeh Shadnezhad, Andreas Nägeli, Jonathan Sjögren, Barbara Adamczyk, Fredrik Leo, Maria Allhorn, Niclas G. Karlsson, Anders Jensen, Mattias Collin

Research output: Contribution to journalArticlepeer-review

Abstract

Aim: The aim of this study was to identify and characterize EndoS-like enzymes in Streptococcus dysgalactiae subspecies dysgalactiae (SDSD). Materials & methods: PCR, DNA sequencing, recombinant protein expression, lectin blot, ultra high performance liquid chromatography analysis and a chitinase assay were used to identify ndoS-like genes and characterize EndoSd. Results: EndoSd were found in four SDSD strains. EndoSd hydrolyzes the chitobiose core of the glycan on IgG. The amino acid sequence of EndoSd is 70% identical to EndoS in S. pyogenes, but it has a unique C-terminal sequence. EndoSd secretion is influenced by the carbohydrate composition of the growth medium. Conclusion: Our findings indicate that IgG glycan hydrolyzing activity is present in SDSD, and that the activity can be attributed to the here identified enzyme EndoSd.

Original languageEnglish
Pages (from-to)721-736
Number of pages16
JournalFuture Microbiology
Volume11
Issue number6
DOIs
Publication statusPublished - 2016 Jun 1

Subject classification (UKÄ)

  • Infectious Medicine
  • Cell and Molecular Biology

Free keywords

  • asparagine linked
  • chitinases
  • Endo-β-N-acetylglucosaminidase
  • glycosidase
  • IgG
  • Streptococcus dysgalactiae

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