Abstract
The aim of this research was to extract the crude peptide extracts from two samples of artisanal “Coalho” cheese produced in the city of Venturosa in the drylands of the State of Pernambuco – Brazil, and evaluate their peptide profile and antimicrobial activity. Electrophoresis showed evidence of 12 to 15 bands and mass spectrometry identified 24 peptide fragments. Furthermore, the crude extract presented antimicrobial activity against Enterococcus faecalis ATCC 6057, Bacillus subtilis ATCC 6633, Escherichia coli ATCC 25922 and Pseudomonas aeruginosa ATCC 27853 at a concentration of 225 mg/mL. The present results suggest that peptides capable of inhibiting the growth of the pathogenic microorganisms tested can be found in approximately 5g of the cheese. Thus “Coalho” cheese can be indicated for its functional character.
Keywords:
SDS-PAGE electrophoresis; MALDI-ToF spectrometry; Antimicrobial activity; Bioactive peptides
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