Reattachment of surface array proteins to Campylobacter fetus cells

L. Yang, Z. Pei, S. Fujimoto, M. J. Blaser

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Campylobacter fetus strains may be of serotype A or B, a property associated with lipopolysaccharide (LPS) structure. Wild-type C. fetus strains contain surface array proteins (S-layer proteins) that may be extracted in water and that are critical for virulence. To explore the relationship of S-layer proteins to other surface components, we reattached S-layer proteins onto S- template cells generated by spontaneous mutation or by serial extractions of S+ cells with water. Reattachment occurred in the presence of divalent (Ba2+, Ca2+, Co2+, and Mg2+) but not monovalent (H+, NH4 +, Na+, K+) or trivalent (Fe3+) cations. The 98-, 125-, 127-, and 149-kDa S-layer proteins isolated from strains containing type A LPS (type A S-layer protein) all reattached to S- template cells containing type A LPS (type A cells) but not to type B cells. The 98-kDa type B S-layer protein reattached to SAP- type B cells but not to type A cells. Recombinant 98-kDa type A S-layer protein and its truncated amino-terminal 65- and 50-kDa segments expressed in Escherichia coli retained the full and specific determinants for attachment. S-layer protein and purified homologous but not heterologous LPS in the presence of calcium produced insoluble complexes. By quantitative enzyme-linked immunosorbent assay, the S-layer protein copy number per C. fetus cell was determined to be approximately 105. In conclusion, C. fetus cells are encapsulated by a large number of S-layer protein molecules which may be specifically attached through the N-terminal half of the molecule to LPS in the presence of divalent cations.

Original languageEnglish
Pages (from-to)1258-1267
Number of pages10
JournalJournal of bacteriology
Volume174
Issue number4
DOIs
Publication statusPublished - Jan 1 1992

Fingerprint

Campylobacter fetus
Lipopolysaccharides
Protein S
Serial Extraction
S-layer proteins
B-Lymphocytes
Water
Divalent Cations
Virulence
Cations

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Molecular Biology

Cite this

Reattachment of surface array proteins to Campylobacter fetus cells. / Yang, L.; Pei, Z.; Fujimoto, S.; Blaser, M. J.

In: Journal of bacteriology, Vol. 174, No. 4, 01.01.1992, p. 1258-1267.

Research output: Contribution to journalArticle

Yang, L. ; Pei, Z. ; Fujimoto, S. ; Blaser, M. J. / Reattachment of surface array proteins to Campylobacter fetus cells. In: Journal of bacteriology. 1992 ; Vol. 174, No. 4. pp. 1258-1267.
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