Salivary proteins promote proteolytic activity in Streptococcus mitis biovar 2 and Streptococcus mutans

C. Kindblom, J. R. Davies, Mark C Herzberg, G. Svensäter, C. Wickström

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A major function of the salivary pellicle on oral surfaces is to promote colonization of the commensal microbiota by providing binding sites for adherence. Streptococcus mitis is an early colonizer of the oral cavity whereas Streptococcus mutans represents a later colonizer. To survive and grow, oral bacteria produce enzymes, proteases and glycosidases, which allow them to exploit salivary proteins as a nutrient source. In this study, adherence and proteolytic activity of S. mitis biovar 2 and S. mutans were investigated in a flow-cell model in the presence of different populations of surface-associated salivary proteins. Streptococcus mitis biovar 2 adhered well to surfaces coated with both a MUC5B-enriched fraction and a pool of low-density proteins containing MUC7, amylase, cystatin, gp340, immunoglobulin A, lactoferrin, lysozyme and statherin, whereas adherence of S. mutans to these proteins was poor. In environments of MUC5B or the low-density proteins, both S. mitis biovar 2 and S. mutans showed high levels of proteolytic activity. For S. mitis in the MUC5B environment, most of this activity may be attributable to contact with the molecules in the fluid phase although activity was also enhanced by adherence to surface-associated MUC5B. These data suggest that although they differ in their capacity to adhere to surface-associated salivary proteins, in the natural environment exploitation of saliva as a nutrient source can contribute to survival and colonization of the oral cavity by both S. mitis biovar 2 and S. mutans.

Original languageEnglish (US)
Pages (from-to)362-372
Number of pages11
JournalMolecular Oral Microbiology
Volume27
Issue number5
DOIs
StatePublished - Oct 1 2012

Fingerprint

Streptococcus mitis
Salivary Proteins and Peptides
Streptococcus mutans
Mouth
Dental Pellicle
Cystatins
Food
Lactoferrin
Glycoside Hydrolases
Microbiota
Protein S
Amylases
Muramidase
Saliva
Immunoglobulin A
Proteins
Peptide Hydrolases
Binding Sites
Bacteria
Enzymes

Keywords

  • Adherence
  • Biofilm
  • Mucin
  • Oral streptococci
  • Saliva

Cite this

Salivary proteins promote proteolytic activity in Streptococcus mitis biovar 2 and Streptococcus mutans. / Kindblom, C.; Davies, J. R.; Herzberg, Mark C; Svensäter, G.; Wickström, C.

In: Molecular Oral Microbiology, Vol. 27, No. 5, 01.10.2012, p. 362-372.

Research output: Contribution to journalArticle

Kindblom, C. ; Davies, J. R. ; Herzberg, Mark C ; Svensäter, G. ; Wickström, C. / Salivary proteins promote proteolytic activity in Streptococcus mitis biovar 2 and Streptococcus mutans. In: Molecular Oral Microbiology. 2012 ; Vol. 27, No. 5. pp. 362-372.
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