Converting Bulk Sugars into Functional Fibers: Discovery and Application of a Thermostable ß-1,3-Oligoglucan Phosphorylase.
J Agric Food Chem
; 72(18): 10497-10505, 2024 May 08.
Article
in En
| MEDLINE
| ID: mdl-38659290
ABSTRACT
Despite their broad application potential, the widespread use of ß-1,3-glucans has been hampered by the high cost and heterogeneity associated with current production methods. To address this challenge, scalable and economically viable processes are needed for the production of ß-1,3-glucans with tailorable molecular mass distributions. Glycoside phosphorylases have shown to be promising catalysts for the bottom-up synthesis of ß-1,3-(oligo)glucans since they combine strict regioselectivity with a cheap donor substrate (i.e., α-glucose 1-phosphate). However, the need for an expensive priming substrate (e.g., laminaribiose) and the tendency to produce shorter oligosaccharides still form major bottlenecks. Here, we report the discovery and application of a thermostable ß-1,3-oligoglucan phosphorylase originating from Anaerolinea thermophila (AtßOGP). This enzyme combines a superior catalytic efficiency toward glucose as a priming substrate, high thermostability, and the ability to synthesize high molecular mass ß-1,3-glucans up to DP 75. Coupling of AtßOGP with a thermostable variant of Bifidobacterium adolescentis sucrose phosphorylase enabled the efficient production of tailorable ß-1,3-(oligo)glucans from sucrose, with a near-complete conversion of >99 mol %. This cost-efficient process for the conversion of renewable bulk sugar into ß-1,3-(oligo)glucans should facilitate the widespread application of these versatile functional fibers across various industries.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bacterial Proteins
/
Enzyme Stability
Language:
En
Journal:
J Agric Food Chem
Year:
2024
Document type:
Article
Affiliation country:
Bélgica
Country of publication:
Estados Unidos