CERELA   05438
CENTRO DE REFERENCIA PARA LACTOBACILOS
Unidad Ejecutora - UE
capítulos de libros
Título:
Aminoacids requirement and metabolism by lactic acid bacteria
Autor/es:
SAGUIR F.M AND MANCA DE NADRA MC
Libro:
Nitrogen Compounds Metabolism by Lactic Acid Bacteria
Editorial:
Transworld Research Network
Referencias:
Lugar: Kerala, India; Año: 2008; p. 25 - 37
Resumen:
Lactic acid bacteria (LAB) have numerous
nutritional requirements for growth, especially
nitrogen sources. The amino acid requirements
appear to be strain dependent in Oenococcus oeni
strains isolated from wines. By contrast in the most of
Lactobacillus plantarum strains from oranges needed six
common amino acids for growth in synthetic medium.
Similar results were obtained for Lactococcus lactis
since the majority of strains needed the five same
essential amino acids for growth. The amino acid
auxotrophies are due to minor genetic lesions that, in most cases, are
reparable by single-step mutations. Several distinct amino acid transport
systems allow lactic acid bacteria to utilize free amino acids as nitrogen
sources.
The general assumption is that biomass synthesis in LAB is
predominantly from building blocks present in the culture medium. The
dissociation between catabolism of the energetic substrates (glucose, organic
acids) and carbon assimilation from organic nitrogen sources (amino acids)
may be less complete in deficient nutritional conditions, with some exchange of
carbon flux between the different types of carbon substrates. The results of
organic acids addition individually or in combination to the media deficient in
one amino acid on the growth of the lactic acid bacteria, suggest that the
essential amino acids can be synthesized from intermediaries metabolic
derived from components of the medium such as L-malic and citric acids.
Amino acids catabolism could have an important role in the ability to
obtain energy in nutrient-limited environments; however, the catabolic
pathway for many amino acids remains partially characterized in LAB.
Arginine utilization in some LAB when is degraded to citrulline, ornithine andammonium, via ADI pathway, produces additional energy.. Several distinct amino acid transport
systems allow lactic acid bacteria to utilize free amino acids as nitrogen
sources.
The general assumption is that biomass synthesis in LAB is
predominantly from building blocks present in the culture medium. The
dissociation between catabolism of the energetic substrates (glucose, organic
acids) and carbon assimilation from organic nitrogen sources (amino acids)
may be less complete in deficient nutritional conditions, with some exchange of
carbon flux between the different types of carbon substrates. The results of
organic acids addition individually or in combination to the media deficient in
one amino acid on the growth of the lactic acid bacteria, suggest that the
essential amino acids can be synthesized from intermediaries metabolic
derived from components of the medium such as L-malic and citric acids.
Amino acids catabolism could have an important role in the ability to
obtain energy in nutrient-limited environments; however, the catabolic
pathway for many amino acids remains partially characterized in LAB.
Arginine utilization in some LAB when is degraded to citrulline, ornithine andammonium, via ADI pathway, produces additional energy.LAB is
predominantly from building blocks present in the culture medium. The
dissociation between catabolism of the energetic substrates (glucose, organic
acids) and carbon assimilation from organic nitrogen sources (amino acids)
may be less complete in deficient nutritional conditions, with some exchange of
carbon flux between the different types of carbon substrates. The results of
organic acids addition individually or in combination to the media deficient in
one amino acid on the growth of the lactic acid bacteria, suggest that the
essential amino acids can be synthesized from intermediaries metabolic
derived from components of the medium such as L-malic and citric acids.
Amino acids catabolism could have an important role in the ability to
obtain energy in nutrient-limited environments; however, the catabolic
pathway for many amino acids remains partially characterized in LAB.
Arginine utilization in some LAB when is degraded to citrulline, ornithine andammonium, via ADI pathway, produces additional energy.
auxotrophies are due to minor genetic lesions that, in most cases, are
reparable by single-step mutations. Several distinct amino acid transport
systems allow lactic acid bacteria to utilize free amino acids as nitrogen
sources.
The general assumption is that biomass synthesis in LAB is
predominantly from building blocks present in the culture medium. The
dissociation between catabolism of the energetic substrates (glucose, organic
acids) and carbon assimilation from organic nitrogen sources (amino acids)
may be less complete in deficient nutritional conditions, with some exchange of
carbon flux between the different types of carbon substrates. The results of
organic acids addition individually or in combination to the media deficient in
one amino acid on the growth of the lactic acid bacteria, suggest that the
essential amino acids can be synthesized from intermediaries metabolic
derived from components of the medium such as L-malic and citric acids.
Amino acids catabolism could have an important role in the ability to
obtain energy in nutrient-limited environments; however, the catabolic
pathway for many amino acids remains partially characterized in LAB.
Arginine utilization in some LAB when is degraded to citrulline, ornithine andammonium, via ADI pathway, produces additional energy.
systems allow lactic acid bacteria to utilize free amino acids as nitrogen
sources.
The general assumption is that biomass synthesis in LAB is
predominantly from building blocks present in the culture medium. The
dissociation between catabolism of the energetic substrates (glucose, organic
acids) and carbon assimilation from organic nitrogen sources (amino acids)
may be less complete in deficient nutritional conditions, with some exchange of
carbon flux between the different types of carbon substrates. The results of
organic acids addition individually or in combination to the media deficient in
one amino acid on the growth of the lactic acid bacteria, suggest that the
essential amino acids can be synthesized from intermediaries metabolic
derived from components of the medium such as L-malic and citric acids.
Amino acids catabolism could have an important role in the ability to
obtain energy in nutrient-limited environments; however, the catabolic
pathway for many amino acids remains partially characterized in LAB.
Arginine utilization in some LAB when is degraded to citrulline, ornithine andammonium, via ADI pathway, produces additional energy.
predominantly from building blocks present in the culture medium. The
dissociation between catabolism of the energetic substrates (glucose, organic
acids) and carbon assimilation from organic nitrogen sources (amino acids)
may be less complete in deficient nutritional conditions, with some exchange of
carbon flux between the different types of carbon substrates. The results of
organic acids addition individually or in combination to the media deficient in
one amino acid on the growth of the lactic acid bacteria, suggest that the
essential amino acids can be synthesized from intermediaries metabolic
derived from components of the medium such as L-malic and citric acids.
Amino acids catabolism could have an important role in the ability to
obtain energy in nutrient-limited environments; however, the catabolic
pathway for many amino acids remains partially characterized in LAB.
Arginine utilization in some LAB when is degraded to citrulline, ornithine andammonium, via ADI pathway, produces additional energy.ed six
common amino acids for growth in synthetic medium.
Similar results were obtained for Lactococcus lactis
since the majority of strains needed the five same
essential amino acids for growth. The amino acid
auxotrophies are due to minor genetic lesions that, in most cases, are
reparable by single-step mutations. Several distinct amino acid transport
systems allow lactic acid bacteria to utilize free amino acids as nitrogen
sources.
The general assumption is that biomass synthesis in LAB is
predominantly from building blocks present in the culture medium. The
dissociation between catabolism of the energetic substrates (glucose, organic
acids) and carbon assimilation from organic nitrogen sources (amino acids)
may be less complete in deficient nutritional conditions, with some exchange of
carbon flux between the different types of carbon substrates. The results of
organic acids addition individually or in combination to the media deficient in
one amino acid on the growth of the lactic acid bacteria, suggest that the
essential amino acids can be synthesized from intermediaries metabolic
derived from components of the medium such as L-malic and citric acids.
Amino acids catabolism could have an important role in the ability to
obtain energy in nutrient-limited environments; however, the catabolic
pathway for many amino acids remains partially characterized in LAB.
Arginine utilization in some LAB when is degraded to citrulline, ornithine andammonium, via ADI pathway, produces additional energy.. Several distinct amino acid transport
systems allow lactic acid bacteria to utilize free amino acids as nitrogen
sources.
The general assumption is that biomass synthesis in LAB is
predominantly from building blocks present in the culture medium. The
dissociation between catabolism of the energetic substrates (glucose, organic
acids) and carbon assimilation from organic nitrogen sources (amino acids)
may be less complete in deficient nutritional conditions, with some exchange of
carbon flux between the different types of carbon substrates. The results of
organic acids addition individually or in combination to the media deficient in
one amino acid on the growth of the lactic acid bacteria, suggest that the
essential amino acids can be synthesized from intermediaries metabolic
derived from components of the medium such as L-malic and citric acids.
Amino acids catabolism could have an important role in the ability to
obtain energy in nutrient-limited environments; however, the catabolic
pathway for many amino acids remains partially characterized in LAB.
Arginine utilization in some LAB when is degraded to citrulline, ornithine andammonium, via ADI pathway, produces additional energy.LAB is
predominantly from building blocks present in the culture medium. The
dissociation between catabolism of the energetic substrates (glucose, organic
acids) and carbon assimilation from organic nitrogen sources (amino acids)
may be less complete in deficient nutritional conditions, with some exchange of
carbon flux between the different types of carbon substrates. The results of
organic acids addition individually or in combination to the media deficient in
one amino acid on the growth of the lactic acid bacteria, suggest that the
essential amino acids can be synthesized from intermediaries metabolic
derived from components of the medium such as L-malic and citric acids.
Amino acids catabolism could have an important role in the ability to
obtain energy in nutrient-limited environments; however, the catabolic
pathway for many amino acids remains partially characterized in LAB.
Arginine utilization in some LAB when is degraded to citrulline, ornithine andammonium, via ADI pathway, produces additional energy.
auxotrophies are due to minor genetic lesions that, in most cases, are
reparable by single-step mutations. Several distinct amino acid transport
systems allow lactic acid bacteria to utilize free amino acids as nitrogen
sources.
The general assumption is that biomass synthesis in LAB is
predominantly from building blocks present in the culture medium. The
dissociation between catabolism of the energetic substrates (glucose, organic
acids) and carbon assimilation from organic nitrogen sources (amino acids)
may be less complete in deficient nutritional conditions, with some exchange of
carbon flux between the different types of carbon substrates. The results of
organic acids addition individually or in combination to the media deficient in
one amino acid on the growth of the lactic acid bacteria, suggest that the
essential amino acids can be synthesized from intermediaries metabolic
derived from components of the medium such as L-malic and citric acids.
Amino acids catabolism could have an important role in the ability to
obtain energy in nutrient-limited environments; however, the catabolic
pathway for many amino acids remains partially characterized in LAB.
Arginine utilization in some LAB when is degraded to citrulline, ornithine andammonium, via ADI pathway, produces additional energy.
systems allow lactic acid bacteria to utilize free amino acids as nitrogen
sources.
The general assumption is that biomass synthesis in LAB is
predominantly from building blocks present in the culture medium. The
dissociation between catabolism of the energetic substrates (glucose, organic
acids) and carbon assimilation from organic nitrogen sources (amino acids)
may be less complete in deficient nutritional conditions, with some exchange of
carbon flux between the different types of carbon substrates. The results of
organic acids addition individually or in combination to the media deficient in
one amino acid on the growth of the lactic acid bacteria, suggest that the
essential amino acids can be synthesized from intermediaries metabolic
derived from components of the medium such as L-malic and citric acids.
Amino acids catabolism could have an important role in the ability to
obtain energy in nutrient-limited environments; however, the catabolic
pathway for many amino acids remains partially characterized in LAB.
Arginine utilization in some LAB when is degraded to citrulline, ornithine andammonium, via ADI pathway, produces additional energy.
predominantly from building blocks present in the culture medium. The
dissociation between catabolism of the energetic substrates (glucose, organic
acids) and carbon assimilation from organic nitrogen sources (amino acids)
may be less complete in deficient nutritional conditions, with some exchange of
carbon flux between the different types of carbon substrates. The results of
organic acids addition individually or in combination to the media deficient in
one amino acid on the growth of the lactic acid bacteria, suggest that the
essential amino acids can be synthesized from intermediaries metabolic
derived from components of the medium such as L-malic and citric acids.
Amino acids catabolism could have an important role in the ability to
obtain energy in nutrient-limited environments; however, the catabolic
pathway for many amino acids remains partially characterized in LAB.
Arginine utilization in some LAB when is degraded to citrulline, ornithine andammonium, via ADI pathway, produces additional energy.