1 41 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 GGCCGAUGGU AGUGUGGGGU CUCCCCAUGC GAGAGUAGGC C LOOP1 20 22 Crystallography ? ? Angstroms 1 G O3' -7.312 -24.541 -12.893 2 G P -7.582 -23.897 -11.444 O3' -7.464 -24.945 -7.035 3 C P -7.753 -23.381 -6.787 O3' -5.615 -21.446 -1.989 4 C P -5.310 -19.874 -1.834 O3' -1.584 -17.765 0.844 5 G P -2.378 -16.370 0.873 O3' 0.232 -12.122 -1.270 6 A P -0.316 -10.856 -2.096 O3' 4.468 -7.904 -1.239 7 U P 4.287 -6.329 -1.503 O3' 6.847 -3.394 -4.381 8 G P 5.828 -2.159 -4.223 O3' 4.653 0.402 -8.971 9 G P 3.773 1.600 -8.361 O3' -1.249 1.736 -11.362 10 U P -2.671 2.388 -10.992 O3' -7.653 1.036 -11.498 11 A P -8.462 2.295 -10.909 O3' -12.861 1.050 -7.462 12 G P -13.573 2.317 -6.773 O3' -14.136 3.410 -1.823 13 U P -14.777 4.849 -2.148 O3' -13.469 8.662 1.753 14 G P -13.548 10.251 1.512 O3' -9.675 13.201 4.022 15 U P -10.049 14.762 3.950 O3' -5.712 18.032 3.309 16 G P -6.170 19.571 3.214 O3' -2.943 22.556 -0.166 17 G P -3.480 24.067 -0.277 O3' -2.785 26.188 -5.392 18 G P -3.466 27.600 -5.757 O3' -5.274 27.792 -11.000 19 G P -5.780 29.251 -11.448 O3' -10.131 31.211 -12.571 20 U P -9.839 32.773 -12.324 O3' -13.361 34.915 -8.527 21 C P -13.737 34.056 -7.220 O3' -18.231 31.763 -5.466 22 U P -17.760 31.663 -3.932 O3' -21.880 28.223 -2.559 23 C P -22.829 26.952 -2.856 O3' -22.168 24.487 -7.434 24 C P -21.541 23.008 -7.339 O3' -18.288 20.981 -11.222 25 C P -17.573 19.569 -10.940 O3' -12.825 18.715 -13.638 26 C P -12.183 17.275 -13.322 O3' -6.699 17.720 -13.981 27 A P -6.101 16.231 -14.064 O3' -1.658 15.690 -11.121 28 U P -1.136 14.174 -11.000 O3' 1.147 12.529 -6.440 29 G P 1.267 10.934 -6.259 O3' 1.580 9.962 -0.809 30 C P 2.205 8.481 -0.731 O3' -0.354 5.328 2.993 31 G P 0.341 3.894 2.778 O3' -2.203 -0.187 1.220 32 A P -1.080 -1.197 0.669 O3' -3.862 -5.213 1.870 33 G P -2.814 -6.395 1.580 O3' -6.228 -10.686 -0.397 34 A P -5.516 -11.926 -1.137 O3' -7.119 -14.059 -5.695 35 G P -5.942 -15.131 -5.912 O3' -3.784 -14.881 -11.259 36 U P -2.355 -15.486 -11.676 O3' 1.272 -14.352 -14.491 37 A P 1.952 -15.777 -14.176 O3' 7.338 -15.239 -13.680 38 G P 7.685 -16.801 -13.820 O3' 9.964 -18.937 -9.195 39 G P 9.951 -20.525 -8.934 O3' 9.568 -23.215 -5.202 40 C P 9.939 -24.391 -6.234 O3' 7.340 -29.195 -4.975 41 C P 7.273 -30.290 -6.150 O3' 3.636 -33.906 -7.268 1 41 + + c 2 40 + + c 3 39 + + c 4 38 + + c 5 37 S H t 6 36 H W t 7 35 H W t 9 33 W H t 10 32 W H t 11 31 H S t 12 30 + + c 13 29 W W c 14 28 W W c 15 27 - - c 16 26 + + c 17 25 + + c 18 24 + + c 8 34 ! ! ! 19 23 ! ! ! 1 41 19 SG1 20 22 1 66.479 0.000 2 66.479 27.700 3 66.479 55.399 4 66.479 83.099 5 66.479 110.798 6 66.479 138.498 7 66.479 166.197 8 66.479 193.897 9 66.479 221.597 10 66.479 249.296 11 66.479 276.996 12 66.479 304.695 13 66.479 332.395 14 66.479 360.094 15 66.479 387.794 16 66.479 415.494 17 66.479 443.193 18 66.479 470.893 19 66.479 498.592 20 63.848 533.341 21 33.239 550.000 22 2.631 533.341 23 0.000 498.592 24 0.000 470.893 25 0.000 443.193 26 0.000 415.494 27 0.000 387.794 28 0.000 360.094 29 0.000 332.395 30 0.000 304.695 31 0.000 276.996 32 0.000 249.296 33 0.000 221.597 34 0.000 193.897 35 0.000 166.197 36 0.000 138.498 37 0.000 110.798 38 0.000 83.099 39 0.000 55.399 40 0.000 27.700 41 0.000 0.000