Certain bacteria indigenous to humans produce antimicrobial substances called bacteriocins which inhibit other bacteria, including members of their own species. Mutacins are a class of antibiotic substances made by Streptococcus mutans. Disclosed is the purification and biochemical characterization of a novel lanthionine-containing mutacin peptide from S. mutans. The purified peptide is pH- and temperature-stable and its amino acid composition indicates the presence of lanthionine and .beta.-methyllanthionine. Also provided are methods of making and using the purified polypeptide.

Bepaalde bacteriƫn inheems aan mensen produceren antimicrobial substanties genoemd bacteriocins die andere bacteriƫn, met inbegrip van leden van hun eigen soorten verbieden. Mutacins is een klasse van antibiotische substanties die door mutans Streptokok wordt gemaakt. Onthuld worden de reiniging en de biochemische karakterisering van nieuwe lanthionine-bevattende mutacinpeptide van S. mutans. Gezuiverde peptide is pH - en de temperatuur-stal en zijn aminozuursamenstelling wijzen op de aanwezigheid van lanthionine en beta.-methyllanthionine. ook verstrekt zijn methodes om het gezuiverde polypeptide te maken en te gebruiken.

 
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