Table 1.

Saccharide (φ,ψ) dihedral angles

Saccharide[AB(E)CD]2 (2a)[AB(E)CD]3 (2a)[lABCDA′] (Y)
Rha(A)-Rha(B)−86°, −167°−91°, −166°−64°, −92°
Rha(B)-Rha(C)−78°, −128°−75°, −127°−82°, −116°
Rha(C)-GlcNAc(D)−92°, 134°−89°, 132°−115°, 145°
GlcNAc(D)-Rha(A′)−67°, −139°−66°, −138°−90°, 177°
Glc(E)-Rha(C)146°, 147°145°, 151°
Rha(A′)-Rha(B′)−80°, −146°−81°, −149°
Rha(B′)-Rha(C′)−70°, −129°−74°, −127°
Rha(C′)-GlcNAc(D′)−85°, 126°−90°, 144°
Glc(E′)-Rha(C′)56°, 95°49°, 95°
GlcNAc(D′)-Rha(A″)−81°, −126°
  • International Union of Pure and Applied Chemistry convention (www.chem.qmul.ac.uk/iupac/misc/psac.html). Mean values from the four crystallographically independent molecules are given for the 2a serotype [AB(E)CD]2 and [AB(E)CD]3 complexes and for the Y serotype pentasaccharide (ABCDA′) complex with mAb SYA/J6 (PDB ID 1m7i).