6S2B

Structure of beta-fructofuranosidase from Schwanniomyces occidentalis complexed with fructosyl-erythritol

Summary for 6S2B

• Entry DOI: 10.2210/pdb6s2b/pdb
• Descriptor: Fructofuranosidase, beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, ... (8 entities in total)
• Functional Keywords: hydrolase, beta-fructofuranosidase, glycosidase, carbohydrate, carbohydrate metabolism, polisaccharide degradation, complex, fructosyl-erythritol, fructosylation, transfructosylation, fructooligosaccharides, fructo-conjugates
• Biological source: Schwanniomyces occidentalis (Yeast)
• Total number of polymer chains: 2
• Total formula weight: 125716.45

Authors

Jimenez-Ortega, E.,Sanz-Aparicio, J. (deposition date: 2019-06-20, release date: 2021-04-28, Last modification date: 2024-01-24)

Primary citation

Rodrigo-Frutos, D.,Jimenez-Ortega, E.,Piedrabuena, D.,Ramirez-Escudero, M.,Miguez, N.,Plou, F.J.,Sanz-Aparicio, J.,Fernandez-Lobato, M.
New insights into the molecular mechanism behind mannitol and erythritol fructosylation by beta-fructofuranosidase from Schwanniomyces occidentalis.
Sci Rep, 11:7158-7158, 2021

PubMed Abstract: The β-fructofuranosidase from Schwanniomyces occidentalis (Ffase) is a useful biotechnological tool for the fructosylation of different acceptors to produce fructooligosaccharides (FOS) and fructo-conjugates. In this work, the structural determinants of Ffase involved in the transfructosylating reaction of the alditols mannitol and erythritol have been studied in detail. Complexes with fructosyl-erythritol or sucrose were analyzed by crystallography and the effect of mutational changes in positions Gln-176, Gln-228, and Asn-254 studied to explore their role in modulating this biocatalytic process. Interestingly, N254T variant enhanced the wild-type protein production of fructosyl-erythritol and FOS by [Formula: see text] 30% and 48%, respectively. Moreover, it produced neokestose, which represented [Formula: see text] 27% of total FOS, and yielded 31.8 g l blastose by using glucose as exclusive fructosyl-acceptor. Noteworthy, N254D and Q176E replacements turned the specificity of Ffase transferase activity towards the synthesis of the fructosylated polyols at the expense of FOS production, but without increasing the total reaction efficiency. The results presented here highlight the relevance of the pair Gln-228/Asn-254 for Ffase donor-sucrose binding and opens new windows of opportunity for optimizing the generation of fructosyl-derivatives by this enzyme enhancing its biotechnological applicability.

PubMed: 33785821
DOI: 10.1038/s41598-021-86568-6

Experimental method

X-RAY DIFFRACTION (1.88 Å)