1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 0000-0001-6382-4929 Filippova, E.V. 0000-0003-3174-9359 Kossiakoff, A.A. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 90.00 90.00 90.00 1.00 1.00 1.00 C10 H14 N5 O7 P 347.221 y ADENOSINE-5'-MONOPHOSPHATE RNA linking C9 H14 N3 O8 P 323.197 y CYTIDINE-5'-MONOPHOSPHATE RNA linking C10 H14 N5 O8 P 363.221 y GUANOSINE-5'-MONOPHOSPHATE RNA linking C9 H13 N2 O9 P 324.181 y URIDINE-5'-MONOPHOSPHATE RNA linking N 1 N O N 2 N P N 3 N O N 4 N O N 5 N O N 6 N C N 7 R C N 8 N O N 9 S C N 10 N O N 11 R C N 12 N O N 13 R C Y 14 N N Y 15 N C Y 16 N N Y 17 N C Y 18 N C N 19 N N Y 20 N N Y 21 N C Y 22 N N Y 23 N C N 24 N H N 25 N H N 26 N H N 27 N H N 28 N H N 29 N H N 30 N H N 31 N H N 32 N H N 33 N H N 34 N H N 35 N H N 36 N H N 37 N H N 38 N O N 39 N P N 40 N O N 41 N O N 42 N O N 43 N C N 44 R C N 45 N O N 46 S C N 47 N O N 48 R C N 49 N O N 50 R C N 51 N N N 52 N C N 53 N O N 54 N N N 55 N C N 56 N N N 57 N C N 58 N C N 59 N H N 60 N H N 61 N H N 62 N H N 63 N H N 64 N H N 65 N H N 66 N H N 67 N H N 68 N H N 69 N H N 70 N H N 71 N H N 72 N H N 73 N O N 74 N P N 75 N O N 76 N O N 77 N O N 78 N C N 79 R C N 80 N O N 81 S C N 82 N O N 83 R C N 84 N O N 85 R C Y 86 N N Y 87 N C Y 88 N N Y 89 N C N 90 N C N 91 N O N 92 N N N 93 N C N 94 N N N 95 N N Y 96 N C N 97 N H N 98 N H N 99 N H N 100 N H N 101 N H N 102 N H N 103 N H N 104 N H N 105 N H N 106 N H N 107 N H N 108 N H N 109 N H N 110 N H N 111 N O N 112 N P N 113 N O N 114 N O N 115 N O N 116 N C N 117 R C N 118 N O N 119 S C N 120 N O N 121 R C N 122 N O N 123 R C N 124 N N N 125 N C N 126 N O N 127 N N N 128 N C N 129 N O N 130 N C N 131 N C N 132 N H N 133 N H N 134 N H N 135 N H N 136 N H N 137 N H N 138 N H N 139 N H N 140 N H N 141 N H N 142 N H N 143 N H N 144 N H N 1 N sing N 2 N sing N 3 N doub N 4 N sing N 5 N sing N 6 N sing N 7 N sing N 8 N sing N 9 N sing N 10 N sing N 11 N sing N 12 N sing N 13 N sing N 14 N sing N 15 N sing N 16 N sing N 17 N sing N 18 N sing N 19 N sing N 20 N sing N 21 N sing N 22 N sing N 23 N sing N 24 N sing Y 25 N sing Y 26 N sing Y 27 N doub N 28 N sing Y 29 N sing Y 30 N sing Y 31 N doub N 32 N sing Y 33 N doub N 34 N sing N 35 N sing Y 36 N sing Y 37 N doub N 38 N sing Y 39 N sing N 40 N sing N 41 N sing N 42 N doub N 43 N sing N 44 N sing N 45 N sing N 46 N sing N 47 N sing N 48 N sing N 49 N sing N 50 N sing N 51 N sing N 52 N sing N 53 N sing N 54 N sing N 55 N sing N 56 N sing N 57 N sing N 58 N sing N 59 N sing N 60 N sing N 61 N sing N 62 N sing N 63 N sing N 64 N sing N 65 N sing N 66 N doub N 67 N sing N 68 N doub N 69 N sing N 70 N sing N 71 N sing N 72 N sing N 73 N doub N 74 N sing N 75 N sing N 76 N sing N 77 N sing N 78 N doub N 79 N sing N 80 N sing N 81 N sing N 82 N sing N 83 N sing N 84 N sing N 85 N sing N 86 N sing N 87 N sing N 88 N sing N 89 N sing N 90 N sing N 91 N sing N 92 N sing N 93 N sing N 94 N sing N 95 N sing N 96 N sing N 97 N sing N 98 N sing N 99 N sing Y 100 N sing Y 101 N sing Y 102 N doub N 103 N sing Y 104 N sing N 105 N sing Y 106 N doub N 107 N doub N 108 N sing N 109 N sing N 110 N sing N 111 N sing N 112 N doub N 113 N sing N 114 N sing N 115 N sing N 116 N sing N 117 N sing N 118 N doub N 119 N sing N 120 N sing N 121 N sing N 122 N sing N 123 N sing N 124 N sing N 125 N sing N 126 N sing N 127 N sing N 128 N sing N 129 N sing N 130 N sing N 131 N sing N 132 N sing N 133 N sing N 134 N sing N 135 N sing N 136 N sing N 137 N sing N 138 N sing N 139 N sing N 140 N sing N 141 N sing N 142 N doub N 143 N sing N 144 N sing N 145 N sing N 146 N doub N 147 N sing N 148 N doub N 149 N sing N 150 N sing UK Nucleic Acids Res. NARHAD 0389 1362-4962 54 10.1093/nar/gkag502 42165126 A universal Fab targeting a conserved U1A-RNA epitope for RNA structure determination by cryo-EM. 2026 10.2210/pdb9z6i/pdb pdb_00009z6i AB INITIO MODEL REAL 3hhn 1 3hhn PDB experimental model The final map resolution was estimated based on the gold-standard Fourier Shell Correlation (FSC) using the 0.143 cut-off criterion as implemented in cryoSPARC 9Z6I 59244 4.32 OTHER POINT REL 2025-11-14 RCSB 2026-06-03 2026-05-27 Cryo-EM structure of the open state of cIL RNA region at 4.3 A resolution 10 mM HEPES, 75 mM NaCl, 5 mM MgCl2 7.4 1 PHASE FLIPPING AND AMPLITUDE CORRECTION 1 cIL-U1A-Fab1R-PGA1-sfFab18 quaternary complex 0 MULTIPLE SOURCES COMPLEX NO 32630 synthetic construct 32630 synthetic construct PARTICLE 1 1 SINGLE PARTICLE 7.1 60 GATAN K3 BIOQUANTUM (6k x 4k) 2 10696 300 FIELD EMISSION GUN FLOOD BEAM TFS KRIOS BRIGHT FIELD 2500 900 1 GOLD 300 Quantifoil R1.2/1.3 9Z6I C1 PARTICLE SELECTION 1 cryoSPARC 3.3.1 MODEL REFINEMENT PHENIX 1.20.1_4487 IMAGE ACQUISITION 1 1 1 MASKING 1 1 1 CTF CORRECTION 1 LAYERLINE INDEXING 1 1 1 DIFFRACTION INDEXING 1 1 1 MODEL FITTING 1 1 1 OTHER 1 1 1 INITIAL EULER ASSIGNMENT 1 FINAL EULER ASSIGNMENT 1 CLASSIFICATION 1 RECONSTRUCTION 1 cryoSPARC 3.3.1 VOLUME SELECTION 1 1 1 SERIES ALIGNMENT 1 1 1 MOLECULAR REPLACEMENT 1 1 1 LATTICE DISTORTION CORRECTION 1 1 1 SYMMETRY DETERMINATION 1 1 1 CRYSTALLOGRAPHY MERGING 1 1 1 3 NO NO NO YES 283 ETHANE 9Z6I 100 FEI VITROBOT MARK IV 49835.676 RNA (155-MER) 1 syn polymer no no UCCAGUAGGAACACUAUACUACUGGAUAAUCAAAGACAAAUCUGCCCGAAGGGCUUGAGAACAUAACCCAUUGCACUCCG GGUAUGCAGAGGUGGCAGCCUCCGGUGGGUUAAAACCCAACGUUCUCAACAAUAGUGACCCAUUGCACUCCGGGU UCCAGUAGGAACACUAUACUACUGGAUAAUCAAAGACAAAUCUGCCCGAAGGGCUUGAGAACAUAACCCAUUGCACUCCG GGUAUGCAGAGGUGGCAGCCUCCGGUGGGUUAAAACCCAACGUUCUCAACAAUAGUGACCCAUUGCACUCCGGGU A polyribonucleotide n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n -11.341 1 19 A -6 A 18 -12.836 A_C-6:G18_A 1 -23.004 0.019 1.168 -0.641 -5.193 1 19 A -5 A 17 -5.264 A_C-5:G17_A 2 -12.259 0.116 0.490 -0.263 1.839 1 20 A -4 A 16 -13.291 A_A-4:U16_A 3 -7.014 0.088 0.053 -0.035 10.093 1 19 A -3 A 15 -6.128 A_G-3:C15_A 4 -1.873 -0.227 0.235 -0.225 14.803 1 20 A -2 A 14 -6.674 A_U-2:A14_A 5 -11.554 0.140 -0.229 -0.191 -3.832 1 20 A -1 A 13 2.501 A_A-1:U13_A 6 -10.930 -0.147 -0.141 -0.244 -22.689 1 19 A 1 A 12 -4.789 A_G1:C12_A 7 -20.359 -0.347 0.092 -0.295 -26.837 1 8 A 2 A 11 -23.736 A_G2:A11_A 8 -12.343 0.205 0.339 1.321 -12.710 1 20 A 115 A 10 -0.994 A_A115:U10_A 9 -7.077 -0.036 -0.195 -0.106 -6.811 1 20 A 116 A 9 -4.077 A_U116:A9_A 10 1.807 0.043 0.113 -0.154 -0.149 1 20 A 117 A 8 -6.202 A_A117:U8_A 11 -16.819 0.021 -0.091 -0.094 3.564 1 19 A 118 A 7 -6.344 A_G118:C7_A 12 -15.358 -0.081 0.752 -0.232 -14.497 1 19 A 44 A 40 -1.239 A_G44:C40_A 13 -0.839 -0.300 -0.525 -0.203 2.404 1 19 A 77 A 39 -2.869 A_G77:C39_A 14 4.734 -0.177 -0.142 -0.215 -4.261 1 19 A 78 A 38 0.206 A_G78:C38_A 15 -6.323 -0.317 -0.264 -0.237 -1.355 1 19 A 79 A 37 -1.446 A_C79:G37_A 16 -2.214 0.183 -0.086 -0.261 -6.803 1 20 A 80 A 36 -2.796 A_A80:U36_A 17 -4.559 0.045 -0.167 -0.150 -12.495 1 19 A 81 A 35 -1.403 A_G81:C35_A 18 -9.512 -0.121 -0.170 -0.118 -9.594 1 19 A 82 A 75 -1.205 A_C82:G75_A 19 7.043 0.116 -0.012 -0.158 -3.027 1 19 A 83 A 74 -2.012 A_C83:G74_A 20 -3.039 0.207 -0.073 -0.172 6.831 1 20 A 84 A 73 0.556 A_U84:A73_A 21 -6.116 0.069 -0.193 -0.179 4.531 1 19 A 85 A 72 -0.626 A_C85:G72_A 22 -5.132 0.201 -0.111 -0.174 4.309 1 19 A 86 A 105 0.112 A_C86:G105_A 23 -7.457 0.194 -0.144 -0.198 -5.748 1 19 A 87 A 104 -0.064 A_G87:C104_A 24 -9.314 -0.279 -0.092 -0.187 1.569 1 8 A 88 A 103 -7.357 A_G88:A103_A 25 -11.733 -0.127 -0.564 1.342 1.832 1 20 A 89 A 102 -8.700 A_U89:A102_A 26 -6.835 -0.019 -0.274 -0.191 -19.600 1 19 A 90 A 101 -1.560 A_G90:C101_A 27 -4.657 -0.156 -0.462 -0.246 19.614 1 19 A 91 A 100 -3.434 A_G91:C100_A 28 4.922 0.053 0.236 0.316 -8.544 1 19 A 92 A 99 -2.365 A_G92:C99_A 29 -4.116 0.378 -2.200 -0.509 14.824 A 94 A 98 29.459 A_U94:A98_A 30 18.546 6.924 1.242 -3.253 -2.604 1 19 A 46 A 113 0.044 A_G46:C113_A 31 -0.298 -0.266 -0.130 -0.241 5.729 1 20 A 48 A 112 2.586 A_U48:A112_A 32 0.328 0.145 -0.172 -0.269 2.261 1 20 A 49 A 111 2.262 A_U49:A111_A 33 -0.235 0.028 -0.216 -0.297 -8.072 1 19 A 50 A 110 -1.264 A_G50:C110_A 34 -4.886 -0.137 -0.227 -0.233 -11.087 1 20 A 51 A 109 -1.575 A_A51:U109_A 35 -6.046 0.013 -0.279 -0.198 -4.599 1 19 A 52 A 108 -3.900 A_G52:C108_A 36 -3.811 -0.260 -0.115 -0.221 -0.143 1 20 A 53 A 107 1.834 A_A53:U107_A 37 -9.273 -0.115 -0.036 -0.243 -1.204 1 20 A 54 A 106 5.672 A_A54:U106_A 38 0.057 -0.177 -0.170 -0.307 -5.487 1 19 A 55 A 69 -0.016 A_C55:G69_A 39 -0.218 0.122 -0.079 -0.170 -1.548 1 20 A 56 A 68 4.336 A_A56:U68_A 40 -9.738 -0.217 -0.086 -0.256 1.739 1 20 A 57 A 67 2.046 A_U57:A67_A 41 -5.895 0.090 -0.113 -0.223 -4.584 1 20 A 1001 A 1018 7.176 A_A1001:U1018_A 42 -8.593 -0.051 0.037 -0.323 14.415 1 19 A 1002 A 1017 -1.125 A_C1002:G1017_A 43 -9.550 0.137 -0.252 -0.135 0.716 1 19 A 1003 A 1016 1.296 A_C1003:G1016_A 44 -4.372 0.219 0.005 -0.207 0.778 1 19 A 1004 A 1015 1.065 A_C1004:G1015_A 45 -4.131 0.450 -0.063 -0.261 3.165 37.628 A A -6 -5 -13.822 A A 18 17 3.003 -8.812 0.059 -1.141 AA_C-6C-5:G17G18_AA 1 5.128 -8.043 36.269 -0.667 0.550 2.825 33.110 A A -5 -4 6.015 A A 17 16 2.990 3.417 -0.477 -0.928 AA_C-5A-4:U16G17_AA 2 3.126 -5.502 32.794 -2.142 1.308 3.044 35.488 A A -4 -3 14.753 A A 16 15 3.412 8.826 -0.329 -1.043 AA_A-4G-3:C15U16_AA 3 -8.124 13.579 33.460 -3.027 -0.671 2.970 38.375 A A -3 -2 8.240 A A 15 14 3.157 5.399 0.737 -1.217 AA_G-3U-2:A14C15_AA 4 0.363 -0.553 38.006 -2.485 -1.078 3.002 37.872 A A -2 -1 14.231 A A 14 13 3.631 9.138 1.036 -1.800 AA_U-2A-1:U13A14_AA 5 -3.569 5.558 36.624 -3.982 -2.069 3.587 37.835 A A -1 1 3.362 A A 13 12 3.740 2.177 -0.389 -1.984 AA_A-1G1:C12U13_AA 6 2.789 -4.308 37.675 -3.374 1.002 3.163 35.478 A A 1 2 -1.144 A A 12 11 3.201 -0.697 -0.945 -1.767 AA_G1G2:A11C12_AA 7 2.492 -4.093 35.386 -2.801 1.907 2.031 59.393 A A 2 115 12.101 A A 11 10 2.842 11.837 -1.278 -2.402 AA_G2A115:U10A11_AA 8 13.324 -13.621 56.890 -2.883 1.805 2.434 34.552 A A 115 116 21.811 A A 10 9 3.192 12.670 -0.948 -1.522 AA_A115U116:A9U10_AA 9 0.144 -0.247 32.211 -4.311 1.616 2.356 32.740 A A 116 117 25.834 A A 9 8 3.031 14.080 0.029 -0.898 AA_U116A117:U8A9_AA 10 3.560 -6.531 29.421 -3.708 0.484 2.919 34.888 A A 117 118 12.268 A A 8 7 3.152 7.265 -0.141 -0.705 AA_A117G118:C7U8_AA 11 -6.310 10.654 33.574 -2.218 -0.671 3.080 26.266 A A 44 77 -9.145 A A 40 39 2.860 -4.135 -0.172 -1.616 AA_G44G77:C39C40_AA 12 -2.021 4.470 25.867 -2.536 -0.120 2.436 35.480 A A 77 78 18.875 A A 39 38 3.246 11.310 -0.030 -2.097 AA_G77G78:C38C39_AA 13 -1.633 2.725 33.645 -4.921 -0.164 2.800 36.319 A A 78 79 8.901 A A 38 37 3.080 5.527 -0.440 -1.742 AA_G78C79:G37C38_AA 14 -0.977 1.573 35.897 -3.493 0.582 2.411 34.984 A A 79 80 21.980 A A 37 36 3.213 12.912 0.277 -1.666 AA_C79A80:U36G37_AA 15 1.961 -3.338 32.526 -4.511 -0.197 2.913 30.974 A A 80 81 11.852 A A 36 35 3.351 6.282 0.443 -1.987 AA_A80G81:C35U36_AA 16 2.173 -4.099 30.269 -4.895 -0.423 3.391 45.676 A A 81 82 -5.824 A A 35 75 3.263 -4.513 1.666 -0.812 AA_G81C82:G75C35_AA 17 1.975 -2.548 45.424 -0.645 -1.970 2.206 30.836 A A 82 83 26.176 A A 75 74 3.167 13.470 -0.117 -1.529 AA_C82C83:G74G75_AA 18 0.215 -0.417 27.802 -5.149 0.257 2.466 30.042 A A 83 84 13.620 A A 74 73 2.912 6.997 0.222 -1.583 AA_C83U84:A73G74_AA 19 -1.020 1.985 29.217 -4.252 -0.602 2.596 33.930 A A 84 85 14.659 A A 73 72 3.172 8.467 0.039 -1.964 AA_U84C85:G72A73_AA 20 -1.466 2.539 32.855 -4.584 -0.279 2.819 33.640 A A 85 86 9.896 A A 72 105 3.116 5.701 0.200 -1.556 AA_C85C86:G105G72_AA 21 0.473 -0.821 33.164 -3.539 -0.274 2.435 33.779 A A 86 87 22.501 A A 105 104 3.283 12.767 0.184 -1.675 AA_C86G87:C104G105_AA 22 0.101 -0.178 31.338 -4.761 -0.301 2.790 28.686 A A 87 88 7.199 A A 104 103 3.059 3.540 -0.309 -1.210 AA_G87G88:A103C104_AA 23 5.082 -10.336 28.023 -3.165 1.660 2.331 27.441 A A 88 89 18.897 A A 103 102 3.211 8.803 0.064 -2.227 AA_G88U89:A102A103_AA 24 -2.053 4.407 25.937 -6.588 -0.577 2.388 43.788 A A 89 90 28.949 A A 102 101 3.690 20.787 0.470 -2.002 AA_U89G90:C101A102_AA 25 2.271 -3.162 38.690 -4.654 -0.415 2.162 24.301 A A 90 91 23.586 A A 101 100 2.501 9.518 0.297 0.142 AA_G90G91:C100C101_AA 26 -7.033 17.429 21.262 -1.948 -2.395 3.424 37.698 A A 91 92 18.547 A A 100 99 4.378 11.654 -0.193 -1.807 AA_G91G92:C99C100_AA 27 10.170 -16.186 34.484 -4.685 1.946 4.358 75.744 A A 92 94 19.628 A A 99 98 4.374 23.744 -0.134 0.722 AA_G92U94:A98C99_AA 28 10.394 -8.593 71.805 -0.398 0.540 2.966 46.358 A A 46 48 6.182 A A 113 112 3.091 4.859 -0.538 -1.151 AA_G46U48:A112C113_AA 29 -0.444 0.565 46.115 -1.844 0.649 3.101 33.693 A A 48 49 8.356 A A 112 111 3.392 4.828 -0.267 -1.838 AA_U48U49:A111A112_AA 30 0.372 -0.644 33.353 -3.954 0.521 3.188 31.443 A A 49 50 9.996 A A 111 110 3.545 5.390 -0.140 -1.784 AA_U49G50:C110A111_AA 31 1.368 -2.538 30.959 -4.339 0.524 2.905 34.467 A A 50 51 11.027 A A 110 109 3.280 6.495 -0.058 -1.717 AA_G50A51:U109C110_AA 32 1.562 -2.652 33.833 -3.861 0.330 2.855 30.712 A A 51 52 7.365 A A 109 108 3.072 3.889 0.225 -1.618 AA_A51G52:C108U109_AA 33 1.284 -2.432 30.444 -3.749 -0.195 2.984 33.877 A A 52 53 3.430 A A 108 107 3.071 1.998 -0.291 -1.443 AA_G52A53:U107C108_AA 34 -0.092 0.158 33.819 -2.774 0.485 3.320 35.085 A A 53 54 -1.970 A A 107 106 3.234 -1.186 0.927 -0.588 AA_A53A54:U106U107_AA 35 3.146 -5.227 34.928 -0.798 -1.065 3.189 45.741 A A 54 55 5.140 A A 106 69 3.282 3.990 1.241 -1.549 AA_A54C55:G69U106_AA 36 1.894 -2.440 45.539 -2.337 -1.433 1.978 35.631 A A 55 56 29.009 A A 69 68 2.971 17.063 0.268 -1.376 AA_C55A56:U68G69_AA 37 -0.867 1.474 31.384 -4.252 -0.540 2.935 33.607 A A 56 57 7.476 A A 68 67 3.137 4.311 -0.164 -1.438 AA_A56U57:A67U68_AA 38 -0.336 0.582 33.335 -3.145 0.232 2.581 30.639 A A 57 1001 18.992 A A 67 1018 3.231 9.865 0.500 -1.537 AA_U57A1001:U1018A67_AA 39 -0.033 0.063 29.043 -4.687 -0.953 2.672 30.195 A A 1001 1002 6.513 A A 1018 1017 2.734 3.382 0.448 -0.669 AA_A1001C1002:G1017U1018_AA 40 2.542 -4.894 29.904 -1.854 -0.431 3.218 35.496 A A 1002 1003 7.275 A A 1017 1016 3.496 4.413 -0.147 -2.023 AA_C1002C1003:G1016G1017_AA 41 -4.608 7.597 34.936 -3.987 -0.457 3.095 33.638 A A 1003 1004 1.881 A A 1016 1015 3.149 1.088 0.161 -1.764 AA_C1003C1004:G1015G1016_AA 42 0.831 -1.436 33.611 -3.218 -0.148 citation em_admin citation em_admin repository Initial release repository Initial release repository Initial release repository Initial release repository Initial release repository Initial release repository Initial release repository Initial release Data collection Database references Database references Experimental summary 1 0 2026-05-27 1 0 2026-05-27 1 0 2026-05-27 1 0 1 2026-05-27 1 0 2 2026-05-27 1 0 2026-05-27 1 0 1 2026-05-27 1 0 2026-05-27 1 1 2026-06-03 1 1 2026-06-03 _citation.pdbx_database_id_PubMed _citation.title _em_admin.last_update _citation.pdbx_database_id_PubMed _citation.title _em_admin.last_update United States National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) akossiak@uchicagomedicine.org 0000-0003-3174-9359 Anthony Kossiakoff V. principal investigator/group leader Structure of the core region Cryo-EM structure of the open state of cIL RNA region at 4.3 A resolution N RCSB Y RCSB 2025-11-14 REL RNA was produced in vitro by transcribing a synthetic DNA construct using T7 RNA polymerase from a linearized pUC307HP plasmid 32630 synthetic construct sample 1 155 Y N 3hhn PDB experimental model n 1 -7 A C -6 n 2 C -6 A C -5 n 3 C -5 A A -4 n 4 A -4 A G -3 n 5 G -3 A U -2 n 6 U -2 A A -1 n 7 A -1 A G 1 n 8 G 1 A G 2 n 9 G 2 A A 3 n 10 A 3 A A 4 n 11 A 4 A C 5 n 12 C 5 A A 6 n 13 A 6 A C 7 n 14 C 7 A U 8 n 15 U 8 A A 9 n 16 A 9 A U 10 n 17 U 10 A A 11 n 18 A 11 A C 12 n 19 C 12 A U 13 n 20 U 13 A A 14 n 21 A 14 A C 15 n 22 C 15 A U 16 n 23 U 16 A G 17 n 24 G 17 A G 18 n 25 G 18 A A 19 n 26 A 19 A n 27 20 A n 28 21 A n 29 22 A n 30 23 A n 31 24 A n 32 25 A n 33 26 A n 34 27 A n 35 28 A A 29 n 36 A 29 A C 30 n 37 C 30 A A 31 n 38 A 31 A A 32 n 39 A 32 A A 33 n 40 A 33 A U 34 n 41 U 34 A C 35 n 42 C 35 A U 36 n 43 U 36 A G 37 n 44 G 37 A C 38 n 45 C 38 A C 39 n 46 C 39 A C 40 n 47 C 40 A G 41 n 48 G 41 A A 42 n 49 A 42 A A 43 n 50 A 43 A G 44 n 51 G 44 A G 45 n 52 G 45 A G 46 n 53 G 46 A C 47 n 54 C 47 A U 48 n 55 U 48 A U 49 n 56 U 49 A G 50 n 57 G 50 A A 51 n 58 A 51 A G 52 n 59 G 52 A A 53 n 60 A 53 A A 54 n 61 A 54 A C 55 n 62 C 55 A A 56 n 63 A 56 A U 57 n 64 U 57 A n 65 A 57 A n 66 B 57 A n 67 C 57 A n 68 D 57 A n 69 E 57 A n 70 F 57 A n 71 G 57 A n 72 H 57 A n 73 I 57 A n 74 J 57 A n 75 K 57 A n 76 L 57 A n 77 M 57 A n 78 N 57 A n 79 O 57 A n 80 P 57 A n 81 Q 57 A n 82 R 57 A n 83 S 57 A A 67 n 84 A 67 A U 68 n 85 U 68 A G 69 n 86 G 69 A C 70 n 87 C 70 A A 71 n 88 A 71 A G 72 n 89 G 72 A A 73 n 90 A 73 A G 74 n 91 G 74 A G 75 n 92 G 75 A U 76 n 93 U 76 A G 77 n 94 G 77 A G 78 n 95 G 78 A C 79 n 96 C 79 A A 80 n 97 A 80 A G 81 n 98 G 81 A C 82 n 99 C 82 A C 83 n 100 C 83 A U 84 n 101 U 84 A C 85 n 102 C 85 A C 86 n 103 C 86 A G 87 n 104 G 87 A G 88 n 105 G 88 A U 89 n 106 U 89 A G 90 n 107 G 90 A G 91 n 108 G 91 A G 92 n 109 G 92 A U 93 n 110 U 93 A U 94 n 111 U 94 A A 95 n 112 A 95 A A 96 n 113 A 96 A A 97 n 114 A 97 A A 98 n 115 A 98 A C 99 n 116 C 99 A C 100 n 117 C 100 A C 101 n 118 C 101 A A 102 n 119 A 102 A A 103 n 120 A 103 A C 104 n 121 C 104 A G 105 n 122 G 105 A U 106 n 123 U 106 A U 107 n 124 U 107 A C 108 n 125 C 108 A U 109 n 126 U 109 A C 110 n 127 C 110 A A 111 n 128 A 111 A A 112 n 129 A 112 A C 113 n 130 C 113 A A 114 n 131 A 114 A A 115 n 132 A 115 A U 116 n 133 U 116 A A 117 n 134 A 117 A G 118 n 135 G 118 A n 136 999 A n 137 1000 A A 1001 n 138 A 1001 A C 1002 n 139 C 1002 A C 1003 n 140 C 1003 A C 1004 n 141 C 1004 A A 1005 n 142 A 1005 A U 1006 n 143 U 1006 A U 1007 n 144 U 1007 A G 1008 n 145 G 1008 A C 1009 n 146 C 1009 A A 1010 n 147 A 1010 A C 1011 n 148 C 1011 A U 1012 n 149 U 1012 A C 1013 n 150 C 1013 A C 1014 n 151 C 1014 A G 1015 n 152 G 1015 A G 1016 n 153 G 1016 A G 1017 n 154 G 1017 A U 1018 n 155 U 1018 A author_defined_assembly 1 monomeric not applicable electron microscopy 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 1_555 identity operation 0.0000000000 0.0000000000 0.0000000000 1 A U -7 A U 1 1 Y 1 A U 20 A U 27 1 Y 1 A A 21 A A 28 1 Y 1 A A 22 A A 29 1 Y 1 A U 23 A U 30 1 Y 1 A C 24 A C 31 1 Y 1 A A 25 A A 32 1 Y 1 A A 26 A A 33 1 Y 1 A A 27 A A 34 1 Y 1 A G 28 A G 35 1 Y A 1 A A 57 A A 65 1 Y B 1 A A 57 A A 66 1 Y C 1 A C 57 A C 67 1 Y D 1 A C 57 A C 68 1 Y E 1 A C 57 A C 69 1 Y F 1 A A 57 A A 70 1 Y G 1 A U 57 A U 71 1 Y H 1 A U 57 A U 72 1 Y I 1 A G 57 A G 73 1 Y J 1 A C 57 A C 74 1 Y K 1 A A 57 A A 75 1 Y L 1 A C 57 A C 76 1 Y M 1 A U 57 A U 77 1 Y N 1 A C 57 A C 78 1 Y O 1 A C 57 A C 79 1 Y P 1 A G 57 A G 80 1 Y Q 1 A G 57 A G 81 1 Y R 1 A G 57 A G 82 1 Y S 1 A U 57 A U 83 1 Y 1 A U 999 A U 136 1 Y 1 A G 1000 A G 137 1 Y 1 A A O3' P U A 57 1001 1.60 1 A A P O3' A U 67 1018 1.60 4.32 REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS) N Cryo-EM structure of the open state of cIL RNA at 4.3 A resolution 1 N N hydrog WATSON-CRICK A C -6 A N3 C 2 1_555 A G 18 A N1 G 25 1_555 hydrog WATSON-CRICK A C -6 A N4 C 2 1_555 A G 18 A O6 G 25 1_555 hydrog WATSON-CRICK A C -6 A O2 C 2 1_555 A G 18 A N2 G 25 1_555 hydrog WATSON-CRICK A C -5 A N3 C 3 1_555 A G 17 A N1 G 24 1_555 hydrog WATSON-CRICK A C -5 A N4 C 3 1_555 A G 17 A O6 G 24 1_555 hydrog WATSON-CRICK A C -5 A O2 C 3 1_555 A G 17 A N2 G 24 1_555 hydrog WATSON-CRICK A A -4 A N1 A 4 1_555 A U 16 A N3 U 23 1_555 hydrog WATSON-CRICK A A -4 A N6 A 4 1_555 A U 16 A O4 U 23 1_555 hydrog WATSON-CRICK A G -3 A N1 G 5 1_555 A C 15 A N3 C 22 1_555 hydrog WATSON-CRICK A G -3 A N2 G 5 1_555 A C 15 A O2 C 22 1_555 hydrog WATSON-CRICK A G -3 A O6 G 5 1_555 A C 15 A N4 C 22 1_555 hydrog WATSON-CRICK A U -2 A N3 U 6 1_555 A A 14 A N1 A 21 1_555 hydrog WATSON-CRICK A U -2 A O4 U 6 1_555 A A 14 A N6 A 21 1_555 hydrog WATSON-CRICK A A -1 A N1 A 7 1_555 A U 13 A N3 U 20 1_555 hydrog WATSON-CRICK A A -1 A N6 A 7 1_555 A U 13 A O4 U 20 1_555 hydrog WATSON-CRICK A G 1 A N1 G 8 1_555 A C 12 A N3 C 19 1_555 hydrog WATSON-CRICK A G 1 A N2 G 8 1_555 A C 12 A O2 C 19 1_555 hydrog WATSON-CRICK A G 1 A O6 G 8 1_555 A C 12 A N4 C 19 1_555 hydrog TYPE_8_PAIR A G 2 A N1 G 9 1_555 A A 11 A N1 A 18 1_555 hydrog TYPE_8_PAIR A G 2 A O6 G 9 1_555 A A 11 A N6 A 18 1_555 hydrog A-G MISPAIR A A 6 A N6 A 13 1_555 A G 118 A O6 G 135 1_555 hydrog WATSON-CRICK A C 7 A N3 C 14 1_555 A G 118 A N1 G 135 1_555 hydrog WATSON-CRICK A C 7 A N4 C 14 1_555 A G 118 A O6 G 135 1_555 hydrog WATSON-CRICK A C 7 A O2 C 14 1_555 A G 118 A N2 G 135 1_555 hydrog WATSON-CRICK A U 8 A N3 U 15 1_555 A A 117 A N1 A 134 1_555 hydrog WATSON-CRICK A U 8 A O4 U 15 1_555 A A 117 A N6 A 134 1_555 hydrog WATSON-CRICK A A 9 A N1 A 16 1_555 A U 116 A N3 U 133 1_555 hydrog WATSON-CRICK A A 9 A N6 A 16 1_555 A U 116 A O4 U 133 1_555 hydrog WATSON-CRICK A U 10 A N3 U 17 1_555 A A 115 A N1 A 132 1_555 hydrog WATSON-CRICK A U 10 A O4 U 17 1_555 A A 115 A N6 A 132 1_555 hydrog A-U PAIR A A 31 A N6 A 38 1_555 A U 84 A O2 U 101 1_555 hydrog TYPE_10_PAIR A A 32 A N1 A 39 1_555 A G 74 A N2 G 91 1_555 hydrog TYPE_10_PAIR A A 32 A N6 A 39 1_555 A G 74 A N3 G 91 1_555 hydrog WATSON-CRICK A C 35 A N3 C 42 1_555 A G 81 A N1 G 98 1_555 hydrog WATSON-CRICK A C 35 A N4 C 42 1_555 A G 81 A O6 G 98 1_555 hydrog WATSON-CRICK A C 35 A O2 C 42 1_555 A G 81 A N2 G 98 1_555 hydrog WATSON-CRICK A U 36 A N3 U 43 1_555 A A 80 A N1 A 97 1_555 hydrog WATSON-CRICK A U 36 A O4 U 43 1_555 A A 80 A N6 A 97 1_555 hydrog WATSON-CRICK A G 37 A N1 G 44 1_555 A C 79 A N3 C 96 1_555 hydrog WATSON-CRICK A G 37 A N2 G 44 1_555 A C 79 A O2 C 96 1_555 hydrog WATSON-CRICK A G 37 A O6 G 44 1_555 A C 79 A N4 C 96 1_555 hydrog WATSON-CRICK A C 38 A N3 C 45 1_555 A G 78 A N1 G 95 1_555 hydrog WATSON-CRICK A C 38 A N4 C 45 1_555 A G 78 A O6 G 95 1_555 hydrog WATSON-CRICK A C 38 A O2 C 45 1_555 A G 78 A N2 G 95 1_555 hydrog WATSON-CRICK A C 39 A N3 C 46 1_555 A G 77 A N1 G 94 1_555 hydrog WATSON-CRICK A C 39 A N4 C 46 1_555 A G 77 A O6 G 94 1_555 hydrog WATSON-CRICK A C 39 A O2 C 46 1_555 A G 77 A N2 G 94 1_555 hydrog WATSON-CRICK A C 40 A N3 C 47 1_555 A G 44 A N1 G 51 1_555 hydrog WATSON-CRICK A C 40 A N4 C 47 1_555 A G 44 A O6 G 51 1_555 hydrog WATSON-CRICK A C 40 A O2 C 47 1_555 A G 44 A N2 G 51 1_555 hydrog WATSON-CRICK A G 46 A N1 G 53 1_555 A C 113 A N3 C 130 1_555 hydrog WATSON-CRICK A G 46 A N2 G 53 1_555 A C 113 A O2 C 130 1_555 hydrog WATSON-CRICK A G 46 A O6 G 53 1_555 A C 113 A N4 C 130 1_555 hydrog WATSON-CRICK A U 48 A N3 U 55 1_555 A A 112 A N1 A 129 1_555 hydrog WATSON-CRICK A U 48 A O4 U 55 1_555 A A 112 A N6 A 129 1_555 hydrog WATSON-CRICK A U 49 A N3 U 56 1_555 A A 111 A N1 A 128 1_555 hydrog WATSON-CRICK A U 49 A O4 U 56 1_555 A A 111 A N6 A 128 1_555 hydrog WATSON-CRICK A G 50 A N1 G 57 1_555 A C 110 A N3 C 127 1_555 hydrog WATSON-CRICK A G 50 A N2 G 57 1_555 A C 110 A O2 C 127 1_555 hydrog WATSON-CRICK A G 50 A O6 G 57 1_555 A C 110 A N4 C 127 1_555 hydrog WATSON-CRICK A A 51 A N1 A 58 1_555 A U 109 A N3 U 126 1_555 hydrog WATSON-CRICK A A 51 A N6 A 58 1_555 A U 109 A O4 U 126 1_555 hydrog WATSON-CRICK A G 52 A N1 G 59 1_555 A C 108 A N3 C 125 1_555 hydrog WATSON-CRICK A G 52 A N2 G 59 1_555 A C 108 A O2 C 125 1_555 hydrog WATSON-CRICK A G 52 A O6 G 59 1_555 A C 108 A N4 C 125 1_555 hydrog WATSON-CRICK A A 53 A N1 A 60 1_555 A U 107 A N3 U 124 1_555 hydrog WATSON-CRICK A A 53 A N6 A 60 1_555 A U 107 A O4 U 124 1_555 hydrog WATSON-CRICK A A 54 A N1 A 61 1_555 A U 106 A N3 U 123 1_555 hydrog WATSON-CRICK A A 54 A N6 A 61 1_555 A U 106 A O4 U 123 1_555 hydrog WATSON-CRICK A C 55 A N3 C 62 1_555 A G 69 A N1 G 86 1_555 hydrog WATSON-CRICK A C 55 A N4 C 62 1_555 A G 69 A O6 G 86 1_555 hydrog WATSON-CRICK A C 55 A O2 C 62 1_555 A G 69 A N2 G 86 1_555 hydrog WATSON-CRICK A A 56 A N1 A 63 1_555 A U 68 A N3 U 85 1_555 hydrog WATSON-CRICK A A 56 A N6 A 63 1_555 A U 68 A O4 U 85 1_555 hydrog WATSON-CRICK A U 57 A N3 U 64 1_555 A A 67 A N1 A 84 1_555 hydrog WATSON-CRICK A U 57 A O4 U 64 1_555 A A 67 A N6 A 84 1_555 hydrog A-G MISPAIR A A 71 A N3 A 88 1_555 A G 105 A N2 G 122 1_555 hydrog WATSON-CRICK A G 72 A N1 G 89 1_555 A C 85 A N3 C 102 1_555 hydrog WATSON-CRICK A G 72 A N2 G 89 1_555 A C 85 A O2 C 102 1_555 hydrog WATSON-CRICK A G 72 A O6 G 89 1_555 A C 85 A N4 C 102 1_555 hydrog WATSON-CRICK A A 73 A N1 A 90 1_555 A U 84 A N3 U 101 1_555 hydrog WATSON-CRICK A A 73 A N6 A 90 1_555 A U 84 A O4 U 101 1_555 hydrog WATSON-CRICK A G 74 A N1 G 91 1_555 A C 83 A N3 C 100 1_555 hydrog WATSON-CRICK A G 74 A N2 G 91 1_555 A C 83 A O2 C 100 1_555 hydrog WATSON-CRICK A G 74 A O6 G 91 1_555 A C 83 A N4 C 100 1_555 hydrog WATSON-CRICK A G 75 A N1 G 92 1_555 A C 82 A N3 C 99 1_555 hydrog WATSON-CRICK A G 75 A N2 G 92 1_555 A C 82 A O2 C 99 1_555 hydrog WATSON-CRICK A G 75 A O6 G 92 1_555 A C 82 A N4 C 99 1_555 hydrog WATSON-CRICK A C 86 A N3 C 103 1_555 A G 105 A N1 G 122 1_555 hydrog WATSON-CRICK A C 86 A N4 C 103 1_555 A G 105 A O6 G 122 1_555 hydrog WATSON-CRICK A C 86 A O2 C 103 1_555 A G 105 A N2 G 122 1_555 hydrog WATSON-CRICK A G 87 A N1 G 104 1_555 A C 104 A N3 C 121 1_555 hydrog WATSON-CRICK A G 87 A N2 G 104 1_555 A C 104 A O2 C 121 1_555 hydrog WATSON-CRICK A G 87 A O6 G 104 1_555 A C 104 A N4 C 121 1_555 hydrog TYPE_8_PAIR A G 88 A N1 G 105 1_555 A A 103 A N1 A 120 1_555 hydrog TYPE_8_PAIR A G 88 A O6 G 105 1_555 A A 103 A N6 A 120 1_555 hydrog WATSON-CRICK A U 89 A N3 U 106 1_555 A A 102 A N1 A 119 1_555 hydrog WATSON-CRICK A U 89 A O4 U 106 1_555 A A 102 A N6 A 119 1_555 hydrog WATSON-CRICK A G 90 A N1 G 107 1_555 A C 101 A N3 C 118 1_555 hydrog WATSON-CRICK A G 90 A N2 G 107 1_555 A C 101 A O2 C 118 1_555 hydrog WATSON-CRICK A G 90 A O6 G 107 1_555 A C 101 A N4 C 118 1_555 hydrog WATSON-CRICK A G 91 A N1 G 108 1_555 A C 100 A N3 C 117 1_555 hydrog WATSON-CRICK A G 91 A N2 G 108 1_555 A C 100 A O2 C 117 1_555 hydrog WATSON-CRICK A G 91 A O6 G 108 1_555 A C 100 A N4 C 117 1_555 hydrog WATSON-CRICK A G 92 A N1 G 109 1_555 A C 99 A N3 C 116 1_555 hydrog WATSON-CRICK A G 92 A N2 G 109 1_555 A C 99 A O2 C 116 1_555 hydrog WATSON-CRICK A G 92 A O6 G 109 1_555 A C 99 A N4 C 116 1_555 hydrog U-A PAIR A U 93 A O2 U 110 1_555 A A 98 A N6 A 115 1_555 hydrog U-C MISPAIR A U 93 A O2 U 110 1_555 A C 99 A N4 C 116 1_555 hydrog U-A PAIR A U 94 A O2 U 111 1_555 A A 98 A N6 A 115 1_555 hydrog WATSON-CRICK A A 1001 A N1 A 138 1_555 A U 1018 A N3 U 155 1_555 hydrog WATSON-CRICK A A 1001 A N6 A 138 1_555 A U 1018 A O4 U 155 1_555 hydrog WATSON-CRICK A C 1002 A N3 C 139 1_555 A G 1017 A N1 G 154 1_555 hydrog WATSON-CRICK A C 1002 A N4 C 139 1_555 A G 1017 A O6 G 154 1_555 hydrog WATSON-CRICK A C 1002 A O2 C 139 1_555 A G 1017 A N2 G 154 1_555 hydrog WATSON-CRICK A C 1003 A N3 C 140 1_555 A G 1016 A N1 G 153 1_555 hydrog WATSON-CRICK A C 1003 A N4 C 140 1_555 A G 1016 A O6 G 153 1_555 hydrog WATSON-CRICK A C 1003 A O2 C 140 1_555 A G 1016 A N2 G 153 1_555 hydrog WATSON-CRICK A C 1004 A N3 C 141 1_555 A G 1015 A N1 G 152 1_555 hydrog WATSON-CRICK A C 1004 A N4 C 141 1_555 A G 1015 A O6 G 152 1_555 hydrog WATSON-CRICK A C 1004 A O2 C 141 1_555 A G 1015 A N2 G 152 1_555 RNA RNA, ribozyme, U1A, ribonucleoprotein (snRNP) complex 9Z6I PDB 1 1 9Z6I -7 1018 9Z6I -7 1018 9Z6I A 1 1 155 1 P 1