Nucleotide sequence of the gene for a fibronectin-binding protein from Staphylococcus aureus: use of this peptide sequence in the synthesis of biologically active peptides.

Academic Article

Abstract

  • Binding of cells of Staphylococcus aureus to fibronectin, which may represent a mechanism of host tissue adherence, involves a fibronectin-receptor protein present on the bacterial surface. Cloning of a gene coding for a staphylococcal fibronectin-binding protein and construction of a fusion protein with fibronectin-binding properties was previously reported from our laboratory. We have now sequenced the gene and deduced a primary sequence of the fibronectin-binding protein. The protein resembles other cell-wall-associated proteins on Gram-positive bacteria in that it (i) appears to be anchored in the cell membrane via its C-terminal end, (ii) contains a proline-rich repeating unit outside the membrane anchor, and (iii) contains a long (36-amino acid) signal sequence at the N terminus. The fibronectin-binding activity has been localized to a domain composed of a 38-amino acid unit repeated completely three times and partially a fourth time; the identity between the three 38-amino acid sequences varies from 42 to 87%. Three synthetic peptides mimicking the structure of each 38-amino acid unit were constructed. All three peptides interacted with fibronectin, as indicated by their ability to inhibit binding of fibronectin to staphylococcal cells, whereas an unrelated 37-amino acid peptide showed no inhibitory activity.
  • Keywords

  • Amino Acid Sequence, Bacterial Adhesion, Base Sequence, Cloning, Molecular, DNA, Bacterial, Fibronectins, Molecular Sequence Data, Peptides, Receptors, Fibronectin, Receptors, Immunologic, Staphylococcus aureus, Transcription, Genetic
  • Authorlist

  • Signäs C; Raucci G; Jönsson K; Lindgren PE; Anantharamaiah GM; Höök M; Lindberg M
  • Start Page

  • 699
  • End Page

  • 703
  • Volume

  • 86
  • Issue

  • 2