Iduronate Ring Puckering Effects on Preferred Glycosidic Linkage Conformations in Heparin/Heparan Sulfate and Dermatan Sulfate Disaccharides.

ABSTRACT: The conformation of a glycosaminoglycan (GAG) carbohydrate biopolymer is dependent upon the ring puckering states of its constituent monosaccharide residues and the dihedral angles (φ, ψ) of the glycosidic linkages connecting these residues. In the context of GAGs, the monosaccharide residue iduronate (IdoA; the conjugate base of iduronic acid) is able to take on both chair and boat-like ring pucker states. All-atom explicit-solvent molecular dynamics simulations were applied to determine the extent to which IdoA ring pucker state affects the conformational preferences of (φ, ψ) in 16 different IdoA-containing disaccharides derived from the GAGs heparin/heparan sulfate and dermatan sulfate. Using the extended-system adaptive biasing force (eABF) method, the comp

SUBMITTER: Guvench O 

PROVIDER: S-EPMC12899437 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature