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Updated: Apr 1, 2026

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Published on: September 28, 2022
Glycoside hydrolase family 32 is present in Bacillus subtilis phages
Halim Maaroufi1, Roger C Levesque2
1Institut de biologie intégrative et des systèmes (IBIS), Plate-Forme de Bio-Informatique, Université Laval, Pavillon Charles-Eugène Marchand, 1030 Avenue de la médecine, Québec, Québec, G1V 0A6, Canada. halim.maaroufi@ibis.ulaval.ca.
Background:
Glycoside hydrolase family 32 (GH32) enzymes cleave the glycosidic bond between two monosaccharides or between a carbohydrate and an aglycone moiety. GH32 enzymes have been studied in prokaryotes and in eukaryotes but not in viruses.
Findings:
This is the first analysis of GH32 enzymes in Bacillus subtilis phage SP10, ϕNIT1 and SPG24. Phylogenetic analysis, molecular docking and secretability predictions suggest that phage GH32 enzymes function as levan (fructose homopolysaccharide) fructotransferase.
Conclusions:
We showed that viruses also contain GH32 enzymes and that our analyses in silico strongly suggest that these enzymes function as levan fructotransferase.
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