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Production of fructo-oligosaccharide syrup through catalysis of Bacillus amyloliquefaciens levanase and immobilized Ba-SacB on cell lysate

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Abstract

Levan is a type of fructan with β-(2, 6) fructosyl linkage. In recent years, levan has been used in the medicinal, food and chemical industries for its excellent physicochemical properties of good thermal stability, low viscosity, pseudoplasticity, and non-swelling in water. The levansucrase is key enzyme responsible for biosynthesis of levan from substrate sucrose. In the present study cell lysate of Escherichia coli was used as support for convenient immobilization of Ba-SacB (i.e., Ba-SacB-Cell-Lysate) under the action of dopamine. Compared with the free Ba-SacB, the Ba-SacB-Cell-Lysate showed surprisingly enhanced pH stability in the pH range 6–9, and improved relative activities in the pH ranges 4–5 and 7–10. With the presence of 10% (v/v) butyl alcohol, 5mmol/L Fe3+, and after vortex for 90 min, the Ba-SacB-Cell-Lysate showed up to 14.32 times, 4.63 times, and 9.2 times higher relative activities than the free Ba-SacB. The Ba-SacB-Cell-Lysate kept nearly 81% of the residual activity after 9 cycles of reuse. The fructo-oligosaccharide syrup (FOS) was efficiently produced through the catalysis of levanase with the substrate of levan produced by Ba-SacB-Cell-Lysate, and the preparation conditions were optimized by Box-Behnken response surface methodology.

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Data will be made available on request.

Abbreviations

CLEAs:

Cross-linked enzyme aggregates

ELP:

Elastin-like polypeptide

GRAS:

Generally recognized as safe

MOF:

Metal-organic framework

SEM:

Scanning electron microscope

ZIF:

Zeolite imidazolate framework

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Acknowledgements

This work was supported by National Natural Science Foundation of China (grant number 31870784), Shenyang Science and Technology Project (grant numbers 22-315-6-19 and 21-110-3-19), Scientific Research Projects of Liaoning Provincial Department of Education (grant number LJKZ0660), and Project Program of Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, and Tian** Key Laboratory of Industrial Microbiology, China (grant number 2022KF0101).

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The corresponding authors confirm that all the authors have made substantial contributions to this manuscript. Song Gao, ** Lu: Conceptualization, Methodology, Data curation, Formal analysis, Investigation, Resources, Funding acquisition, Project administration, Supervision, Writing– original draft, review and editing.

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Correspondence to Yingfeng An or Fu** Lu.

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Gao, S., Qi, X., Lu, R. et al. Production of fructo-oligosaccharide syrup through catalysis of Bacillus amyloliquefaciens levanase and immobilized Ba-SacB on cell lysate. Biologia (2024). https://doi.org/10.1007/s11756-024-01728-z

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  • DOI: https://doi.org/10.1007/s11756-024-01728-z

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