Production of hydrolytic enzymes by oral isolates of Eikenella corrodens. 1994

R P Allaker, and K A Young, and J M Hardie
Department of Oral Microbiology, London Hospital Medical College, UK.

Eikenella corrodens isolates from periodontally healthy subjects and adult periodontitis patients were compared for their ability to produce a range of potential virulence factors. All were positive for proline aminopeptidase, thiol-dependent haemolysin and esterase activities. Low or negative activities were found against casein, phospholipid, lipid, collagen, aminophosphate, phosphate under acid or alkaline conditions, and eleven other amino acid substrates tested. In oral infections, the haemolytic activity of E. corrodens could be amplified in the reduced environment of the periodontal pocket and damage host cells. Proline aminopeptidase may act against proline residues in collagen, immunoglobulins and complement proteins.

UI MeSH Term Description Entries
D010518 Periodontitis Inflammation and loss of connective tissues supporting or surrounding the teeth. This may involve any part of the PERIODONTIUM. Periodontitis is currently classified by disease progression (CHRONIC PERIODONTITIS; AGGRESSIVE PERIODONTITIS) instead of age of onset. (From 1999 International Workshop for a Classification of Periodontal Diseases and Conditions, American Academy of Periodontology) Pericementitis,Pericementitides,Periodontitides
D004950 Esterases Any member of the class of enzymes that catalyze the cleavage of an ester bond and result in the addition of water to the resulting molecules. Esterase
D006460 Hemolysin Proteins Proteins from BACTERIA and FUNGI that are soluble enough to be secreted to target ERYTHROCYTES and insert into the membrane to form beta-barrel pores. Biosynthesis may be regulated by HEMOLYSIN FACTORS. Hemolysin,Hemolysins,Hemalysins,Proteins, Hemolysin
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000626 Aminopeptidases A subclass of EXOPEPTIDASES that act on the free N terminus end of a polypeptide liberating a single amino acid residue. EC 3.4.11. Aminopeptidase
D016124 Eikenella corrodens Gram-negative bacteria isolated from infections of the respiratory and intestinal tracts and from the buccal cavity, intestinal tract, and urogenital tract. They are probably part of the normal flora of man and animals. Bacteroides corrodens,Ristella corrodens

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