Structural highlights
Publication Abstract from PubMedTransformation of agro-industrial products into value-added products, such as prebiotic oligosaccharides, is a key element of the emerging bioeconomy. Here, we characterized a new GH30_8 glucuronoxylanase from Bacillus pumilus (BpXyn30_8A) for its potential in producing xylooligosaccharides (XOS). BpXyn30_8A showed tolerance to ethanol and NaCl and released both linear and branched XOS containing MeGlcA at the penultimate nonreducing end residue. Its X-ray structure, determined at 2.16 A resolution, revealed high similarity to other glucuronoxylanases. Furthermore, BpXyn30_8A achieved higher xylan conversion yields from corn cob and Eucalyptus sawdust than Ruminococcus champanellensisRcXyn30A. Finally, fermentation assays showed that Bifidobacterium adolescentis metabolized neutral XOS to acetate and lactate, whereas acidic XOS were poorly utilized. These results highlight the potential of BpXyn30_8A as a valuable enzyme for the green transformation of plant biomass into prebiotic oligosaccharides with promising applications in human and animal nutrition, health, and biotechnology. Enzymatic Production of Prebiotic Xylooligosaccharides Using a Bacillus pumilus GH30_8 Glucuronoxylanase: Structural Basis of Glucuronoxylan Recognition and Hydrolysis.,Vacilotto MM, Pellegrini VOA, Araujo EA, Liberato MV, Polikarpov I J Agric Food Chem. 2026 Feb 18;74(6):5417-5430. doi: 10.1021/acs.jafc.5c07569. , Epub 2026 Feb 3. PMID:41632704[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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