Staphylococcus thermophilus

In fermented probiotic dairy products, probiotics are usually accompanied by starter cultures such as Lactobacillus delbrueckii subsp. bulgaricus and/or Staphylococcus thermophilus. There are two main reasons for the inclusion of starter cultures in a probiotic product. The first is technological starter cultures provide sttucture and flavour to the product. In addition, starter cultures support functionality some probiotics do not grow well as a pure culture in mUk and grow better in symbiosis with a starter culture. 

Aeromonas proteolytica aminopeptidase [a-Aminoacylpeptide hydrolase (Aeromonas proteolytica)] (3.4.11.10) is produced. [A zinc enzyme. Acts most rapidily on L-leucylpeptides, amide and B-naphthylamide. Does not cleave Glu-and Asp-bonds. Similar aminopeptidases were isolated from E, coli and Staphylococcus thermophilus. ] Thermophilic aminopeptidase [a-Aminoacylpeptide hydrolase] (3.4.11.12) is produced. [Metalloen-zymes of high temperature stability and of broad specificity, releasing all N-terminal amino acids, including arginine and lysine. Isolated from Bacillus St ear othermophilus, Talaromyces duponti, Mucor. ]... 

M. phlei, and several strains of M. tuberculosis (28-30) contain a true asparaginase, as do extracts of Bacillus coagulans and Bacillus stearo-thermophilus (31). Brucella abortus contains two asparaginases, one specific for L-asparagine and the other for the opposite enantiomorph (32). An asparaginase is also present in Pseudomonas fluorescens (33). Also, Tsuji, in 1957, had reported the presence of asparaginase in extracts of acetone powders of E. coli, Staphylococcus, M. avium, and Aspergillus oryzae (34). 

---