Short (< 4.5 A) Sequential
and Medium-Range 1H-1H Distances in Polypeptide Secondary
Structures
| Distance |
a-helix
|
310-helix
|
b
|
bp
|
turn Ia
|
turn IIa
|
| daN |
3.5
|
3.4
|
2.2
|
2.2
|
3.4
|
2.2
|
| daN(i,i+2) |
4.4
|
3.8
|
|
|
3.6
|
3.3
|
| daN(i,i+3) |
3.4
|
3.3
|
|
|
3.1-4.2
|
3.8-4.7
|
| daN(i,i+4) |
4.2
|
|
|
|
|
|
| dNN |
2.8
|
2.6
|
4.3
|
4.2
|
2.6
|
4.5
|
| dNN(i,i+2) |
4.2
|
4.1
|
|
|
3.8
|
4.3
|
| dbN |
2.5-4.1
|
2.9-4.4
|
3.2-4.5
|
3.7-4.7
|
2.9,4.4
|
3.6,4.6
|
| dab(i,i+3)b |
2.5-4.4
|
3.1-5.1
|
|
|
|
|
|
|
|
|
|
|
|
aThe two numbers refer to the distance
between residues 2 an 3 and 3 and 4. The range for daN(i,i+3)
distances are for y1
varied between -180 and 180.
bRanges correspond to the distances
of a b-methine
proton is c1
is varied between -180 and 180.