Enzymology and Structural Basis of Glycosyltransferases Involved in Saponin C28 Carboxylic Acid <i>O</i>‑d‑Fucosylation.

ABSTRACT: Saponins are a class of natural products composed of an oxidized triterpene core adorned with glycosylations, ultimately giving rise to medicinally important compounds bearing bioactivity that includes, but is not limited to, anti-inflammatory, antimicrobial, antifungal, antiarrhythmic, and immunostimulatory activities. QS-21 is a prominent immunostimulatory saponin and is a critical adjuvant component of several FDA-approved vaccines. One linchpin modification in the biosynthesis and bioactivity of several saponins, including QS-21, is O-d-fucosylation via an ester linkage. In QS-21, the C28-COOH O-d-fucose residue is part of a linear oligosaccharide that is an integral component of the "core pharmacophore" responsible for its immunomodulatory activity. In this work, we perf

SUBMITTER: Hudson GA 

PROVIDER: S-EPMC12728629 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature