1
21
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21
GGGaUCaCCa UUaGGGaUCU C
4
SRA
7
SRA
10
SRA
13
SRA
17
SRA
LOOP1
11
12
Crystallography ?
? Angstroms
1
G
O3'
-7.870 -3.112 -11.701
2
G
P
-7.367 -2.326 -10.388
O3'
-8.241 -3.675 -5.547
3
G
P
-7.526 -2.488 -4.724
O3'
-4.682 -3.573 -0.574
4
a
P
-4.115 -2.130 -0.142
O3'
0.797 -2.066 2.055
5
U
P
1.394 -0.588 2.289
O3'
6.486 0.444 1.899
6
C
P
6.778 2.020 2.051
O3'
9.846 4.975 -0.158
7
a
P
9.370 6.155 0.825
O3'
8.668 10.815 -3.005
8
C
P
9.999 11.667 -3.326
O3'
8.675 12.244 -7.222
9
C
P
7.942 13.313 -6.265
O3'
4.211 15.856 -9.240
10
a
P
3.551 16.848 -8.156
O3'
-1.740 16.060 -7.720
11
U
P
-2.378 16.911 -6.511
O3'
-6.351 14.802 -3.143
12
U
P
-7.567 15.832 -2.912
O3'
-10.358 10.603 -1.669
13
a
P
-11.924 10.295 -1.903
O3'
-10.560 7.739 -6.570
14
G
P
-10.410 6.226 -7.107
O3'
-6.615 5.371 -10.564
15
G
P
-5.898 4.087 -11.220
O3'
-1.424 4.269 -14.907
16
G
P
-0.421 3.014 -15.052
O3'
4.399 2.776 -15.576
17
a
P
4.527 1.170 -15.577
O3'
9.050 -0.790 -13.439
18
U
P
9.012 -2.400 -13.384
O3'
10.355 -5.067 -9.145
19
C
P
10.004 -6.596 -9.516
O3'
8.436 -10.249 -5.914
20
U
P
7.720 -11.544 -6.553
O3'
3.560 -13.891 -4.381
21
C
P
3.047 -15.050 -5.375
O3'
-1.947 -16.299 -5.830
1
21
+
+
c
2
20
W
W
c
3
19
+
+
c
4
18
-
-
c
5
17
-
-
c
6
16
+
+
c
7
9
S
.
c
8
15
+
+
c
9
14
+
+
c
10
13
S
W
c
7
8
!
!
!
1
21
6
8
15
3
SG1
7
7
SG2
11
12
1
127.179 0.000
2
127.179 52.991
3
127.179 105.982
4
127.179 158.973
5
127.179 211.964
6
127.179 264.955
7
127.179 317.946
8
127.179 370.937
9
127.179 423.928
10
127.179 476.920
11
102.204 550.000
12
24.974 550.000
13
0.000 476.920
14
0.000 423.928
15
0.000 370.937
16
0.000 264.955
17
0.000 211.964
18
0.000 158.973
19
0.000 105.982
20
0.000 52.991
21
0.000 0.000