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Appl Environ Microbiol. Jul 1993; 59(7): 2107–2111.
PMCID: PMC182243

Purification and partial characterization of an elastolytic serine protease of Prevotella intermedia.


Elastolytic strains of Prevotella intermedia were isolated from pus samples of adult periodontal lesions. Elastase was found to associate with envelope, and it could be solubilized with guanidine-HCl. The enzyme was purified to homogeneity by sequential procedures including ion-exchange chromatography, gel filtration, and hydrophobic interaction chromatography. This elastase was a serine protease, and its mass was 31 kDa. It hydrolyzed elastin powder, but collagen and azodye-conjugated proteins were not degraded by this enzyme. Both synthetic substrates for human pancreatic (glutaryl-L-alanyl-L-alanyl-L-prolyl-L-leucine p-nitroanilide) and leukocyte elastase (methoxy succinyl-L-alanyl-alanyl-L-prolyl-L-valine p-nitroanilide) were hydrolyzed.

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