The contribution of caseins to the amino acid supply for Lactococcus lactis depends on the type of cell envelope proteinase
Article Abstract:
A study was conducted to examine the contribution of caseins to the amino acid requirements of Lactococcus lactis for growth as a function of the type of cell envelope proteinase. Cells were prepared in reconstituted skim milk while a mechanical blender was utilized to disrupt the chains of lactococci. A complementary approach was also used to study the growth of L. lactis as a function of the type of proteinase. Results showed that the contribution of caseins to the amino acid supply is correlated with the type of cell envelope proteinase.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1998
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Interaction between proteolytic strains of Lactococcus lactis influenced by different types of proteinase during growth in milk
Article Abstract:
The effect of the type of cell envelope-located proteinase on the associative growth of Lactococcus lactis in milk was investigated. Two genetically engineered strains which are different only because of the type of proteinase, were first employed as a model study. An interaction was observed during the second exponential growth phase of the mixed culture and caused a reduction in growth rate of the P(sub I)-type proteinase strain, while that of the P(sub III)-type proteinase strain was not affected.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1997
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The autoproteolysis of Lactococcus lactis lactocepin III affects its specificity towards beta-casein
Article Abstract:
The purified form of lactocepin III from Lactococcus lactis metabolizes casein differently than the anchored form. The enzyme is purified by autoproteolysis, which releases it from the cell.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 2000
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