Casein utilization by Streptococcus thermophilus results in a diauxic growth in milk.
In milk, Streptococcus thermophilus displays two distinct exponential growth phases, separated by a nonexponential one, during which proteinase synthesis was initiated. During the second exponential phase, utilization of caseins as the source of amino acids resulted in a decrease in growth rate, presumably caused by a limiting peptide transport activity.
Letort
Catherine
C
Unité de Recherches Laitières et Génétique Appliquée. Unité de Biochimie et Structure des Protéines, Institut National de la Recherche Agronomique, 78352 Jouy-en-Josas Cedex, France.
Nardi
Michèle
M
Garault
Peggy
P
Monnet
Véronique
V
Juillard
Vincent
V
D000818:Animals; D001692:Biological Transport; D002364:Caseins / Q000378:metabolism*; D002417:Cattle; D010450:Endopeptidases / Q000378:metabolism; D008892:Milk / Q000378:metabolism*; D010455:Peptides / Q000378:metabolism; D013291:Streptococcus / Q000201:enzymology / Q000254:growth & development* / Q000378:metabolism
D002364:Caseins; D010455:Peptides; D010450:Endopeptidases