Published

2023-01-01

Catalytic properties of purified alpha amylase from Aspergillus flavus cultivated on low-cost agricultural substrate

Propiedades catalíticas de alfa amilasa purificada de Aspergillus flavus cultivada en sustrato agrícola de bajo costo

DOI:

https://doi.org/10.15446/rfnam.v76n1.100842

Keywords:

Alpha amylase, Characterization, Fermented cereals, Organic composite, Purification, Stability (en)
Alfa amilasa, Caracterización, Cereales fermentados, Compuestos orgánicos, Purificación, Estabilidad (es)

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Aspergillus flavus isolated from fermented millet flour produced a crude enzyme, which was purified via ammonium sulphate precipitation and subsequent chromatographic techniques. The biochemical characteristics of the purified amylase were thereafter investigated showing activity in a wide range of pH and temperature, with optimal conditions of pH 6.0 and 50 °C. The enzyme retained even 89% of its activity after 1 h at 50 °C and 2 h at pH 6.0. The purified enzyme was stimulated by Ca2+, Zn2+ and Co2+, while Hg2+ and EDTA caused mild inhibition of α-amylase activity. The kinetic indices (Km and Vmax) and molecular weight of the enzyme were estimated in 1.71 mg mL-1, 2.133 μmol min-1 mL-1 and 45 kDa respectively. The catalytic properties of α-amylase from A. flavus makes it a promising candidate for use in various starch processing industries.

Aspergillus flavus aislado de harina de mijo fermentada produjo una enzima cruda, que se purificó mediante precipitación con sulfato de amonio y técnicas cromatográficas. Posteriormente se investigaron las características bioquímicas de la amilasa purificada mostrando actividad en un amplio rango de pH y temperatura, con condiciones óptimas de pH 6,0 y 50 °C. La enzima retuvo incluso el 89% de su actividad después de 1 h a 50 °C y 2 h a pH 6,0. La enzima purificada fue estimulada por Ca2+, Zn2+ y Co2+, mientras que Hg2+ y EDTA causaron una leve inhibición de la actividad de la α-amilasa. Los índices cinéticos (Km y Vmax) y peso molecular de la enzima se estimaron en 1,71 mg mL-1, 2,133 μmol min-1 mL-1 y 45 kDa respectivamente. Las propiedades catalíticas de la α-amilasa de A. flavus la convierten en un candidato prometedor para su uso en diversas industrias de procesamiento de almidón.

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How to Cite

APA

Owolabi, O. E., Olaniyi, O. O. & Akinyosoye, F. A. (2023). Catalytic properties of purified alpha amylase from Aspergillus flavus cultivated on low-cost agricultural substrate. Revista Facultad Nacional de Agronomía Medellín, 76(1), 10213–10225. https://doi.org/10.15446/rfnam.v76n1.100842

ACM

[1]
Owolabi, O.E., Olaniyi, O.O. and Akinyosoye, F.A. 2023. Catalytic properties of purified alpha amylase from Aspergillus flavus cultivated on low-cost agricultural substrate. Revista Facultad Nacional de Agronomía Medellín. 76, 1 (Jan. 2023), 10213–10225. DOI:https://doi.org/10.15446/rfnam.v76n1.100842.

ACS

(1)
Owolabi, O. E.; Olaniyi, O. O.; Akinyosoye, F. A. Catalytic properties of purified alpha amylase from Aspergillus flavus cultivated on low-cost agricultural substrate. Rev. Fac. Nac. Agron. Medellín 2023, 76, 10213-10225.

ABNT

OWOLABI, O. E.; OLANIYI, O. O.; AKINYOSOYE, F. A. Catalytic properties of purified alpha amylase from Aspergillus flavus cultivated on low-cost agricultural substrate. Revista Facultad Nacional de Agronomía Medellín, [S. l.], v. 76, n. 1, p. 10213–10225, 2023. DOI: 10.15446/rfnam.v76n1.100842. Disponível em: https://revistas.unal.edu.co/index.php/refame/article/view/100842. Acesso em: 23 mar. 2026.

Chicago

Owolabi, Olushola E, Oladipo O Olaniyi, and Felix A Akinyosoye. 2023. “Catalytic properties of purified alpha amylase from Aspergillus flavus cultivated on low-cost agricultural substrate”. Revista Facultad Nacional De Agronomía Medellín 76 (1):10213-25. https://doi.org/10.15446/rfnam.v76n1.100842.

Harvard

Owolabi, O. E., Olaniyi, O. O. and Akinyosoye, F. A. (2023) “Catalytic properties of purified alpha amylase from Aspergillus flavus cultivated on low-cost agricultural substrate”, Revista Facultad Nacional de Agronomía Medellín, 76(1), pp. 10213–10225. doi: 10.15446/rfnam.v76n1.100842.

IEEE

[1]
O. E. Owolabi, O. O. Olaniyi, and F. A. Akinyosoye, “Catalytic properties of purified alpha amylase from Aspergillus flavus cultivated on low-cost agricultural substrate”, Rev. Fac. Nac. Agron. Medellín, vol. 76, no. 1, pp. 10213–10225, Jan. 2023.

MLA

Owolabi, O. E., O. O. Olaniyi, and F. A. Akinyosoye. “Catalytic properties of purified alpha amylase from Aspergillus flavus cultivated on low-cost agricultural substrate”. Revista Facultad Nacional de Agronomía Medellín, vol. 76, no. 1, Jan. 2023, pp. 10213-25, doi:10.15446/rfnam.v76n1.100842.

Turabian

Owolabi, Olushola E, Oladipo O Olaniyi, and Felix A Akinyosoye. “Catalytic properties of purified alpha amylase from Aspergillus flavus cultivated on low-cost agricultural substrate”. Revista Facultad Nacional de Agronomía Medellín 76, no. 1 (January 1, 2023): 10213–10225. Accessed March 23, 2026. https://revistas.unal.edu.co/index.php/refame/article/view/100842.

Vancouver

1.
Owolabi OE, Olaniyi OO, Akinyosoye FA. Catalytic properties of purified alpha amylase from Aspergillus flavus cultivated on low-cost agricultural substrate. Rev. Fac. Nac. Agron. Medellín [Internet]. 2023 Jan. 1 [cited 2026 Mar. 23];76(1):10213-25. Available from: https://revistas.unal.edu.co/index.php/refame/article/view/100842

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