Table 1.
Parameter | In helical part
|
At band-flip sites
|
||||
---|---|---|---|---|---|---|
Max | Min | Mean | Max | Min | Mean | |
Glycosidic angle, °a C(1)n+1–O(4)n–C(4)n | 120.7 | 114.6 | 118.3 | |||
Virtual distance, Åb O(4)n⋯O(4)n−1 | 4.56 | 4.11 | 4.39 | 4.79 | 4.48 | 4.65 |
Virtual angles, °c O(4)n⋯O(4)n+1⋯O(4)n+2 | 136.7 | 117.9 | 126.4 | 149.8 | 138.7 | 143.6 |
Hydrogen bonds, Å O(3)n⋯O(2)n+1 (interglucose) | 3.10 | 2.65 | 2.86 | |||
O(3)n⋯O(6)n+1 (at band-flips) | 2.78 | 2.66 | 2.73 | |||
O(3)n⋯O(5)n+1 | 3.12 | 3.03 | 3.07 | |||
(−)gauche-O(6)n⋯O(2)n+6d | 3.42 | 3.09 | 3.27 | |||
(−)gauche-O(6)n⋯O(3)n+6e (between turns) | 3.27 | 2.65 | 2.85 | |||
(+)gauche-O(6)n⋯O(2)n+6f | 2.97 | 2.66 | 2.75 | |||
(+)gauche-O(6)n⋯O(3)n+6g | 3.28 | 3.09 | 3.23 | |||
Torsion angles, °h φ, O(5)n–C(1)n–O(4)n−1–C(4)n−1 | 115.3 | 91.1 | 103.6 | 90.2 | 86.4 | 88.1 |
Torsion angles, °h ψ, C(1)n–O(4)n−1–C(4)n−1–C(3)n−1 | 131.4 | 97.4 | 115.3 | −51.7 | −45.8 | −48.4 |
Cremer–Pople glucose puckering amplitude Q, Å | 0.58 | 0.52 | 0.54 | 0.58i | 0.53i | 0.54i |
angle θ, ° | 9.8 | 1.0 | 4.6 | 14.7i | 1.1i | 8.3i |
For all glucoses because these angles are not different at band-flips.
Helical parts: n from 3 to 13 and 16 to 26.
Helical parts: n from 2 to 11 and 15 to 24.
d–gHelical parts as in b; averaged over different number of glucoses: d, 11; e, 10; f, 9; and g, 2.
Defined as in footnote ††.
For glucoses G26–G1 and G13–G14.