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Revista mexicana de ingeniería química

versión impresa ISSN 1665-2738

Rev. Mex. Ing. Quím vol.14 no.3 México sep./dic. 2015

 

Biotecnología

 

Synthesis of α-L-Fucosidase in different strains of lactic acid bacteria

 

Síntesis de α-L-Fucosidasa en diferentes cepas de bacterias ácido lácticas

 

Y. Escamina-Lozano1, M. García-Garibay1, 2, A. López-Munguía-Canales3, L. Gómez-Ruiz1, G. Rodríguez-Serrano1, and A. Cruz -Guerrero1*

 

1 Departamento de Biotecnología, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No. 186 Col. Vicentina, México D.F. C.P. 09340, México. * Corresponding author. E-mail: aec@xanum.uam.mx

2 Departamento de Ciencias de la Alimentación, Universidad Autónoma Metropolitana-Lerma, Av. Hidalgo Poniente 46, Col. La Estación, C.P. 52006, Lerma de Villada, Edo. de México, México.

3 Dpto. de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología UNAM, Av. Universidad No. 2001, Col. Chamilpa, C.P. 62210 Cuernavaca, Morelos, México.

 

Received June 3, 2015;
Accepted July 5, 2015.

 

Abstract

The ability of six lactic acid bacteria to produce α-L-fucosidase is reported here for the first time, opening a wide field of investigation into the metabolism and assimilation of human milk oligosaccharides by lactic acid bacteria. Lactobacillus casei IMAU60214, Lactobacillus casei Shirota, Lactobacillus rhamnosus GG, Lactobacillus rhamnosus KLDS, Lactobacillus helveticus IMAU70129 and Lactobacillus delbrueckii subsp. bulgaricus NCFB-2772 were all able to produce α-L-fucosidases. Growth kinetics and carbohydrate consumption meas urements indicated that the six strains were able to metabolise D-glucose and D-galactose as a carbon source; surprisingly, they did not assimilate L-fucose. However, α-L-fucosidase was a cell-associated enzyme and produced constitutively in different carbon sources. The highest cell-associated α-L-fucosidase activity was observed in L. rhamnosus GG (0.16 U mg-1).

Keywords: α-L-fucosidase, lactobacilli, fucose, human milk oligosaccharides.

 

Resumen

Este es el primer estudio que reporta las síntesis de α-L-fucosidasa en seis bacterias ácido lácticas, lo que abre un amplio campo de investigación sobre el metabolismo y la asimilación de los oligosacáridos de la leche humanos por parte de estos microorganismos. Lactobacillus casei IMAU60214, Lactobacillus casei Shirota, Lactobacillus rhamnosus GG, Lactobacillus rhamnosus KLDS, Lactobacillus helveticus IMAU70129 y Lactobacillus delbrueckii subsp. bulgaricus NCFB-2772 fueron capaces de producir α-L-fucosidasa. Las cinéticas de crecimiento y el consumo de carbohidratos indican que las seis cepas son capaces de metabolizar D-glucosa y D-galactosa como fuente de carbono; pero no asimilaron L-fucosa. Por otro lado, las α-L-fucosidasas sintetizadas son enzimas asociadas a la célula y se produjeron de manera constitutiva en diferentes fuentes de carbono. La mayor actividad enzimática se observó en L. rhamnosus GG (0.16 U mg-1).

Palabras clave: α-L-fucosidasa, lactobacilos, fucosa, oligosacáridos de leche humana.

 

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Acknowledgements

We gratefully acknowledge to the National Council for Science and Technology (CONACYT) of México for a graduate scholarship (234678) and financial support for this project (180438).

 

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