1 16 25 24 23 22 21 30 40 50 60 70 80 90 101 102 103 104 GUGGUCUGAU GAGGCC Crystallography ? ? Angstroms 1 G O3' -33.023 6.606 34.973 2 U P -32.032 6.123 33.799 O3' -32.459 9.250 29.186 3 G P -31.071 8.625 28.694 O3' -28.936 13.296 25.979 4 G P -27.660 12.478 25.462 O3' -24.409 16.928 26.357 5 U P -22.936 16.428 25.918 O3' -18.892 19.797 28.149 6 C P -17.739 19.142 27.243 O3' -13.682 18.173 31.017 7 U P -12.712 17.764 29.804 O3' -9.008 14.860 32.813 8 G P -8.109 15.035 31.497 O3' -9.922 9.704 32.107 9 A P -11.320 10.235 31.583 O3' -14.984 8.090 35.383 10 U P -16.166 8.396 34.336 O3' -17.555 4.236 30.403 11 G P -18.901 5.102 30.493 O3' -21.132 -0.223 29.048 12 A P -22.082 -0.426 27.772 O3' -23.463 -2.973 25.107 13 G P -24.260 -2.963 23.720 O3' -25.207 -8.501 25.414 14 G P -26.598 -8.872 26.088 O3' -26.857 -12.503 30.644 15 C P -28.375 -12.559 30.128 O3' -29.066 -14.418 35.279 16 C P -30.642 -14.692 35.395 O3' -33.324 -14.503 39.492 11 12 ! ! ! SG1 6 12 SG2 16 16 1 36.875 0.000 2 36.875 24.044 3 36.875 48.088 4 36.875 72.132 5 36.875 96.176 6 36.875 110.602 7 36.875 125.029 8 36.875 139.455 9 36.875 153.881 10 36.875 168.308 11 36.875 182.734 12 36.875 197.161 13 247.252 170.428 14 261.173 150.823 15 275.094 131.219 16 283.446 119.457 1 20 114 113 112 111 120 130 140 151 152 153 154 31 32 33 34 164 163 162 161 170 GGCC GAAACUCGUA AGAGUc 20 CCC Crystallography ? ? Angstroms 1 G O3' -28.264 0.088 42.698 2 G P -26.715 0.408 42.573 O3' -24.451 -4.001 44.310 3 C P -23.106 -3.241 43.963 O3' -20.697 -7.955 41.801 4 C P -19.223 -7.341 41.660 O3' -16.975 -10.244 37.332 5 G P -15.628 -9.550 37.860 O3' -14.974 -7.545 32.346 6 A P -13.456 -7.121 32.101 O3' -12.091 -7.372 26.591 7 A P -10.687 -6.820 27.152 O3' -9.975 -1.458 25.582 8 A P -8.450 -1.940 25.442 O3' -7.638 3.750 26.233 9 C P -6.106 3.316 26.044 O3' -5.272 7.659 29.668 10 U P -3.672 7.524 29.635 O3' -1.638 8.810 34.561 11 C P -0.168 8.480 34.068 O3' 2.452 6.609 38.432 12 G P 3.723 6.675 37.461 O3' 6.533 1.583 38.043 13 U P 7.594 2.270 37.063 O3' 6.811 -1.200 33.386 14 A P 5.214 -1.111 33.386 O3' 3.435 -6.560 34.049 15 A P 1.841 -6.429 34.119 O3' 0.078 -10.144 37.697 16 G P -1.324 -9.938 36.930 O3' -3.843 -6.656 41.173 17 A P -5.399 -6.672 40.788 O3' -6.888 -1.674 43.199 18 G P -8.470 -1.850 43.058 O3' -10.069 3.671 42.842 19 U P -11.641 3.436 43.134 O3' -14.144 8.762 41.861 20 c P -14.106 9.581 43.236 O3' -10.386 13.387 42.522 19 syn 20 syn 9 18 + + c 10 17 - - c 11 16 + + c 12 15 W H t 19 20 ! ! ! 10 17 3 SG1 1 1 SG2 5 9 SG3 13 14 SG4 18 20 1 236.396 86.047 2 228.044 97.809 3 214.123 117.413 4 200.202 137.017 5 191.849 148.780 6 183.497 160.542 7 175.144 172.305 8 166.792 184.067 9 158.439 195.830 10 57.567 451.875 11 80.671 445.216 12 103.774 438.558 13 107.769 452.420 14 111.765 466.282 15 87.794 383.109 16 64.690 389.768 17 41.586 396.426 18 27.724 400.422 19 13.862 404.417 20 0.000 408.412 1 5 11 12 13 14 15 ACCA C Crystallography ? ? Angstroms 1 A O3' -19.328 17.666 42.234 2 C P -18.908 19.157 42.667 O3' -22.905 21.801 39.220 3 C P -24.251 21.957 40.054 O3' -28.034 23.472 36.086 4 A P -29.178 23.579 37.192 O3' -33.471 23.050 33.583 5 C P -34.423 23.621 34.734 O3' -38.375 20.184 34.022 1 94.581 96.176 2 94.581 72.132 3 94.581 48.088 4 94.581 24.044 5 94.581 0.000 1 25 114 113 112 111 120 130 140 151 152 153 154 31 32 33 34 164 163 162 161 170 11 12 13 14 15 GGCCGAAAC UCGUAAGAGU CACCAC LOOP1 13 14 Crystallography ? ? Angstroms 1 G O3' -28.264 0.088 42.698 2 G P -26.715 0.408 42.573 O3' -24.451 -4.001 44.310 3 C P -23.106 -3.241 43.963 O3' -20.697 -7.955 41.801 4 C P -19.223 -7.341 41.660 O3' -16.975 -10.244 37.332 5 G P -15.628 -9.550 37.860 O3' -14.974 -7.545 32.346 6 A P -13.456 -7.121 32.101 O3' -12.091 -7.372 26.591 7 A P -10.687 -6.820 27.152 O3' -9.975 -1.458 25.582 8 A P -8.450 -1.940 25.442 O3' -7.638 3.750 26.233 9 C P -6.106 3.316 26.044 O3' -5.272 7.659 29.668 10 U P -3.672 7.524 29.635 O3' -1.638 8.810 34.561 11 C P -0.168 8.480 34.068 O3' 2.452 6.609 38.432 12 G P 3.723 6.675 37.461 O3' 6.533 1.583 38.043 13 U P 7.594 2.270 37.063 O3' 6.811 -1.200 33.386 14 A P 5.214 -1.111 33.386 O3' 3.435 -6.560 34.049 15 A P 1.841 -6.429 34.119 O3' 0.078 -10.144 37.697 16 G P -1.324 -9.938 36.930 O3' -3.843 -6.656 41.173 17 A P -5.399 -6.672 40.788 O3' -6.888 -1.674 43.199 18 G P -8.470 -1.850 43.058 O3' -10.069 3.671 42.842 19 U P -11.435 3.264 43.566 O3' -15.411 6.429 41.228 20 C P -15.299 7.895 41.894 O3' -14.532 13.330 41.909 21 A P -15.804 13.460 42.885 O3' -19.328 17.666 42.234 22 C P -18.908 19.157 42.667 O3' -22.905 21.801 39.220 23 C P -24.251 21.957 40.054 O3' -28.034 23.472 36.086 24 A P -29.178 23.579 37.192 O3' -33.471 23.050 33.583 25 C P -34.423 23.621 34.734 O3' -38.375 20.184 34.022 9 18 + + c 10 17 - - c 11 16 + + c 12 15 W H t 8 19 ! ! ! 10 17 3 SG1 1 9 SG2 13 14 SG3 18 25 1 185.938 550.000 2 181.943 536.138 3 177.947 522.276 4 173.952 508.414 5 169.957 494.551 6 165.962 480.689 7 161.967 466.827 8 157.972 452.965 9 153.977 439.103 10 149.981 425.241 11 173.085 418.582 12 196.189 411.923 13 224.913 391.852 14 215.208 358.181 15 180.208 356.475 16 157.104 363.133 17 134.001 369.792 18 130.006 355.930 19 126.010 342.068 20 122.015 328.206 21 118.020 314.343 22 114.025 300.481 23 110.030 286.619 24 106.035 272.757 25 102.040 258.895 10 7 S W c 13 4 + + c 14 3 + + c 15 2 + + c 8 9 ! ! ! 12 5 ! ! ! 13 4 3 1 5 + + c 2 4 - - c 3 3 + + c 4 2 + + c 5 1 - - c 1 4 ! ! ! 1 5 5 1 25 + + c 2 24 - - c 3 23 + + c 4 22 + + c 5 21 - - c 6 20 W W c 10 7 S W c 13 4 + + c 14 3 + + c 15 2 + + c 1 24 ! ! ! 8 9 ! ! ! 12 5 ! ! ! 9 19 ! ! ! 10 20 ! ! ! 9 18 + + c 10 17 - - c 11 16 + + c 12 15 W H t 15 12 H W t 16 11 + + c 17 10 - - c 18 9 + + c 8 19 ! ! !