Beta-D-xylosidase 3 (Bifidobacterium adolescentis) (Xyl3)

Beta-D-xylosidase 3 (Xyl3) is a glycoside hydrolase enzyme produced by the commensal gut bacterium Bifidobacterium adolescentis. It plays a critical role in the degradation of hemicellulose, specifically by hydrolyzing xylo-oligosaccharides (XOS) into xylose monomers. This enzymatic activity is essential for the survival and competitive fitness of Bifidobacterium species in the human gut, as XOS are key prebiotic substrates that promote the growth of beneficial bacteria. While not a target for traditional small-molecule drugs, Xyl3 is a significant target in the development of synbiotics and prebiotics aimed at modulating the gut microbiome. Enhancing or targeting this enzyme's activity can help restore microbial balance, which is associated with the management of inflammatory bowel disease, obesity, and metabolic syndrome. Research into its structural stability and binding affinity with various XOS molecules provides insights into optimizing prebiotic design for improved human health.

Other names

Beta-xylosidase 3Xyl31,4-beta-D-xylan xylohydrolaseXylan 1,4-beta-xylosidaseBAD_0428 (putative)

Hydrolysis of (1->4)-beta-D-xylans to remove successive D-xylose residues from the non-reducing termini.