CINDEFI   05381
CENTRO DE INVESTIGACION Y DESARROLLO EN FERMENTACIONES INDUSTRIALES
Unidad Ejecutora - UE
artículos
Título:
Acyl CoA oxidase activity from Beauveria bassiana an entomopathogenic fungus
Autor/es:
ALCONADA MAGLIANO, TERESA M.; JUÁREZ, M.P
Revista:
JOURNAL OF BASIC MICROBIOLOGY
Editorial:
Willey Interscience
Referencias:
Lugar: Weinheim; Año: 2006 vol. 46 p. 435 - 443
ISSN:
0233-111X
Resumen:
Beauveria bassiana produces acyl-Co oxidase (ACO) in the P20000 g fraction of glucose and alkanegrown
cultures that catalyze the oxidation of acyl-CoAs of different chain length. The activity was
measured indirectly over the formation of H2O2 via the oxidative-coupled assay system. ACO activity
was assessed spectrophotometrically in the P20000 g fraction of glucose-grown (FS0) and n-alkane
grown cultures (FSalk), employing acyl-CoAs of 16 to 24 carbons as substrates. A significant increment
in the activity was observed in FSalk as compared to that of controls (FS0) in all conditions tested.
Tetracosane-grown cultures showed the highest activity with lignoceroyl-CoA. The reaction conditions
were optimized employing lignoceroyl-CoA as substrate. A variable lag phase was observed
when the activity was measured as a function of time. In the presence of 3-amino-1,2,4-triazole (AT)
to prevent H2O2 consumption by endogenous catalase, the lag phase became shorter and disappeared
when AT concentrations were raised from 40 to 200 mM, thus enhancing acyl-CoA oxidation. Enzyme
activity reached its maximal value in the presence of 240 µg peroxidase, 0.08% Triton X-100 and
36 µM bovine serum albumin. The apparent Km using lignoceroyl as substrate was estimated 2.5 µM.
ACO showed high activity and stability between 30 and 40 °C, as well as between 7.0 and 9.0 pH, for
120 min, being 7.0 the optimum pH.produces acyl-Co oxidase (ACO) in the P20000 g fraction of glucose and alkanegrown
cultures that catalyze the oxidation of acyl-CoAs of different chain length. The activity was
measured indirectly over the formation of H2O2 via the oxidative-coupled assay system. ACO activity
was assessed spectrophotometrically in the P20000 g fraction of glucose-grown (FS0) and n-alkane
grown cultures (FSalk), employing acyl-CoAs of 16 to 24 carbons as substrates. A significant increment
in the activity was observed in FSalk as compared to that of controls (FS0) in all conditions tested.
Tetracosane-grown cultures showed the highest activity with lignoceroyl-CoA. The reaction conditions
were optimized employing lignoceroyl-CoA as substrate. A variable lag phase was observed
when the activity was measured as a function of time. In the presence of 3-amino-1,2,4-triazole (AT)
to prevent H2O2 consumption by endogenous catalase, the lag phase became shorter and disappeared
when AT concentrations were raised from 40 to 200 mM, thus enhancing acyl-CoA oxidation. Enzyme
activity reached its maximal value in the presence of 240 µg peroxidase, 0.08% Triton X-100 and
36 µM bovine serum albumin. The apparent Km using lignoceroyl as substrate was estimated 2.5 µM.
ACO showed high activity and stability between 30 and 40 °C, as well as between 7.0 and 9.0 pH, for
120 min, being 7.0 the optimum pH.2O2 via the oxidative-coupled assay system. ACO activity
was assessed spectrophotometrically in the P20000 g fraction of glucose-grown (FS0) and n-alkane
grown cultures (FSalk), employing acyl-CoAs of 16 to 24 carbons as substrates. A significant increment
in the activity was observed in FSalk as compared to that of controls (FS0) in all conditions tested.
Tetracosane-grown cultures showed the highest activity with lignoceroyl-CoA. The reaction conditions
were optimized employing lignoceroyl-CoA as substrate. A variable lag phase was observed
when the activity was measured as a function of time. In the presence of 3-amino-1,2,4-triazole (AT)
to prevent H2O2 consumption by endogenous catalase, the lag phase became shorter and disappeared
when AT concentrations were raised from 40 to 200 mM, thus enhancing acyl-CoA oxidation. Enzyme
activity reached its maximal value in the presence of 240 µg peroxidase, 0.08% Triton X-100 and
36 µM bovine serum albumin. The apparent Km using lignoceroyl as substrate was estimated 2.5 µM.
ACO showed high activity and stability between 30 and 40 °C, as well as between 7.0 and 9.0 pH, for
120 min, being 7.0 the optimum pH.20000 g fraction of glucose-grown (FS0) and n-alkane
grown cultures (FSalk), employing acyl-CoAs of 16 to 24 carbons as substrates. A significant increment
in the activity was observed in FSalk as compared to that of controls (FS0) in all conditions tested.
Tetracosane-grown cultures showed the highest activity with lignoceroyl-CoA. The reaction conditions
were optimized employing lignoceroyl-CoA as substrate. A variable lag phase was observed
when the activity was measured as a function of time. In the presence of 3-amino-1,2,4-triazole (AT)
to prevent H2O2 consumption by endogenous catalase, the lag phase became shorter and disappeared
when AT concentrations were raised from 40 to 200 mM, thus enhancing acyl-CoA oxidation. Enzyme
activity reached its maximal value in the presence of 240 µg peroxidase, 0.08% Triton X-100 and
36 µM bovine serum albumin. The apparent Km using lignoceroyl as substrate was estimated 2.5 µM.
ACO showed high activity and stability between 30 and 40 °C, as well as between 7.0 and 9.0 pH, for
120 min, being 7.0 the optimum pH.alk), employing acyl-CoAs of 16 to 24 carbons as substrates. A significant increment
in the activity was observed in FSalk as compared to that of controls (FS0) in all conditions tested.
Tetracosane-grown cultures showed the highest activity with lignoceroyl-CoA. The reaction conditions
were optimized employing lignoceroyl-CoA as substrate. A variable lag phase was observed
when the activity was measured as a function of time. In the presence of 3-amino-1,2,4-triazole (AT)
to prevent H2O2 consumption by endogenous catalase, the lag phase became shorter and disappeared
when AT concentrations were raised from 40 to 200 mM, thus enhancing acyl-CoA oxidation. Enzyme
activity reached its maximal value in the presence of 240 µg peroxidase, 0.08% Triton X-100 and
36 µM bovine serum albumin. The apparent Km using lignoceroyl as substrate was estimated 2.5 µM.
ACO showed high activity and stability between 30 and 40 °C, as well as between 7.0 and 9.0 pH, for
120 min, being 7.0 the optimum pH.alk as compared to that of controls (FS0) in all conditions tested.
Tetracosane-grown cultures showed the highest activity with lignoceroyl-CoA. The reaction conditions
were optimized employing lignoceroyl-CoA as substrate. A variable lag phase was observed
when the activity was measured as a function of time. In the presence of 3-amino-1,2,4-triazole (AT)
to prevent H2O2 consumption by endogenous catalase, the lag phase became shorter and disappeared
when AT concentrations were raised from 40 to 200 mM, thus enhancing acyl-CoA oxidation. Enzyme
activity reached its maximal value in the presence of 240 µg peroxidase, 0.08% Triton X-100 and
36 µM bovine serum albumin. The apparent Km using lignoceroyl as substrate was estimated 2.5 µM.
ACO showed high activity and stability between 30 and 40 °C, as well as between 7.0 and 9.0 pH, for
120 min, being 7.0 the optimum pH.2O2 consumption by endogenous catalase, the lag phase became shorter and disappeared
when AT concentrations were raised from 40 to 200 mM, thus enhancing acyl-CoA oxidation. Enzyme
activity reached its maximal value in the presence of 240 µg peroxidase, 0.08% Triton X-100 and
36 µM bovine serum albumin. The apparent Km using lignoceroyl as substrate was estimated 2.5 µM.
ACO showed high activity and stability between 30 and 40 °C, as well as between 7.0 and 9.0 pH, for
120 min, being 7.0 the optimum pH.M, thus enhancing acyl-CoA oxidation. Enzyme
activity reached its maximal value in the presence of 240 µg peroxidase, 0.08% Triton X-100 and
36 µM bovine serum albumin. The apparent Km using lignoceroyl as substrate was estimated 2.5 µM.
ACO showed high activity and stability between 30 and 40 °C, as well as between 7.0 and 9.0 pH, for
120 min, being 7.0 the optimum pH.µg peroxidase, 0.08% Triton X-100 and
36 µM bovine serum albumin. The apparent Km using lignoceroyl as substrate was estimated 2.5 µM.
ACO showed high activity and stability between 30 and 40 °C, as well as between 7.0 and 9.0 pH, for
120 min, being 7.0 the optimum pH.µM bovine serum albumin. The apparent Km using lignoceroyl as substrate was estimated 2.5 µM.
ACO showed high activity and stability between 30 and 40 °C, as well as between 7.0 and 9.0 pH, for
120 min, being 7.0 the optimum pH.