Involvement of an N -Acetylglucosaminidase in Autolysis of Propionibacterium freudenreichii CNRZ 725

Lipase and Esterase Activities of Propionibacterium freudenreichii subsp. freudenreichii.

The lipase and esterase activities of eight strains of dairy Propionibacterium freudenreichii subsp. freudenreichii were studied. A lipase activity was detected on whole cells and in the culture supernatant. The highest activity was expressed at 45 degrees C and pH 6.8. An esterase activity was also detected in the culture medium. The electrophoresis of the intracellular fractions of the cells ...

Utilization of coenzyme A by Propionibacterium freudenreichii.

Aminopeptidase activities of Propionibacterium freudenreichii dairy isolates

This study was undertaken to achieve more information on the aminopeptidase activities expressed in Propionibacterium freudenreichii strains naturally occurring in milk and dairy products. Fifty four strains belonging to both subspecies freudenreichii and shermanii were analyzed for activity towards different amino acyl β-naphthylamide (βNA) derivatives. The ability to efficiently hydrolyze ami...

Occurrence of Propionibacterium freudenreichii bacteriophages in swiss cheese.

We isolated bacteriophages active against Propionibacterium freudenreichii from 16 of 32 swiss cheese samples. Bacteriophage concentrations ranged from 14 to 7 x 10(5) PFU/g, depending on the sample and the sensitive strain used for detection. Only a few strains, 8 of the 44 strains of P. freudenreichii in our collection, were sensitive. We observed that multiplication of bacteriophages occurre...

Synthesis of 1,3#-Glucanase and P-N-Acetylglucosaminidase during Autolysis of Neurospora crassa

The synthesis of 1,3-P-glucanase, P-N-acetylglucosaminidase and total protein was studied during autolysis of Neurospora crassa. Evidence for de novo protein synthesis during autolysis was obtained from the incorporation of [3H]tryptophan and [3H]phenylalanine into the protein pool and from the inhibitory effects of cycloheximide and puromycin. Glucose accumulated in the growth medium during au...