INVESTIGADORES
PERALTA Guillermo Hugo
artículos
Título:
Aminotransferase and glutamate dehydrogenase activities in lactobacilli and streptococci
Autor/es:
PERALTA, GUILLERMO H.; BERGAMINI CARINA V.; HYNES ERICA R.
Revista:
BRAZILIAN JOURNAL OF MICROBIOLOGY
Editorial:
SOC BRASILEIRA MICROBIOLOGIA
Referencias:
Año: 2016
ISSN:
1517-8382
Resumen:
Aminotransferases (AT) and Glutamate dehydrogenase (GDH) are two main enzymes involved in the initial steps of the amino acid catabolism, which plays a key role in the cheese flavour development. In the present work, GDH and AT activities were screened in 21 strains of lactic acid bacteria of dairy interest, either cheese-isolated or commercial starters: 15 mesophilic lactobacilli, 4 thermophilic lactobacilli and 2 streptococci. S. thermophilus strains showed the highest GDH activity, much more elevated than lactobacilli. Asp-AT prevailed in most strains tested, while the levels and specificity of the other ATs was highly strain and species- dependent. Knowledge of the enzymatic profiles of these starter and cheese isolated cultures is helpful in order to propose appropriate combinations of strains for improved or increased cheese flavour.
