Bioprospección y caracterización de bacterias productoras de celulasa del suelo del Cerrado brasileño

Autores/as

DOI:

https://doi.org/10.33448/rsd-v10i8.17426

Palabras clave:

Screening; Enzima; Bacillus; Biotecnología.

Resumen

Este trabajo describe la bioprospección y caracterización de bacterias productoras de celulasa aisladas de suelo obtenido en una región preservada del bioma Cerrado, en Uberaba, Brasil. Se confirmó la actividad celulolítica en 14 de las 84 cepas bacterianas aisladas. De acuerdo con la cuantificación enzimática, se seleccionaron cinco aislamientos como los mejores productores de celulasa y en base a la secuenciación parcial del gen rRNA 16S se identificaron como Bacillus siamensis (aislado AB-9; 5,000U/mL), Bacillus toyonensis (aislado AB-1; 4.630U/mL), Bacillus methylotrophicus (aislados MB-3; 4.236U/mL y MP-7; 4.282U/mL) y Bacillus drentensis (aislado ME-2; 4.444U/mL). El extracto enzimático obtenido de B. siamensis AB-9 fue el más estable a diferentes valores de pH (2-8), manteniendo su actividad celulolítica, mientras que B. toyonensis AB-1 y B. methylotrophicus MP-7 produjeron celulasas con máximos actividad a pH 7 y 8. Las celulasas producidas por B. siamensis AB-9 y B. toyonensis AB-1 mostraron alta actividad enzimática a todas las temperaturas analizadas (10-80°C), mientras que las celulasas de B. methylotrophicus MB-3 mostró una actividad máxima en el rango de 20-70°C. Hasta el momento, esta es la primera vez que se describen bacterias productoras de celulasa aisladas del bioma del Cerrado brasileño en la región del Triângulo Mineiro con potenciales aplicaciones biotecnológicas.

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Publicado

13/07/2021

Cómo citar

ALVES, B. A. .; ROTTA, I. S. .; FERREIRA-MACHADO, A. B. .; PAIVA, A. D. Bioprospección y caracterización de bacterias productoras de celulasa del suelo del Cerrado brasileño. Research, Society and Development, [S. l.], v. 10, n. 8, p. e34010817426, 2021. DOI: 10.33448/rsd-v10i8.17426. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/17426. Acesso em: 23 nov. 2024.

Número

Sección

Ciencias Agrarias y Biológicas