0.010991 0.006345 -0.000000 0.000000 0.012691 -0.000000 0.000000 0.000000 0.004239 0.00000 0.00000 0.00000 Zhang, L. Doudna, J.A. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 12 90.00 90.00 120.00 90.987 90.987 235.891 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 Mg 2 24.305 MAGNESIUM ION non-polymer 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 MG N 112 N O N 113 N P N 114 N O N 115 N O N 116 N O N 117 N C N 118 R C N 119 N O N 120 S C N 121 N O N 122 R C N 123 N O N 124 R C N 125 N N N 126 N C N 127 N O N 128 N N N 129 N C N 130 N O N 131 N C N 132 N C 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 145 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 US Science SCIEAS 0038 0036-8075 295 2084 2088 10.1126/science.1069268 11859154 Structural insights into group II intron catalysis and branch-site selection. 2002 10.2210/pdb1kxk/pdb pdb_00001kxk 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 100 1 100 1 CCD 2001-04-22 ADSC QUANTUM 4 CCD 2001-04-22 ADSC QUANTUM 4 Si(111) or (220) SINGLE WAVELENGTH M x-ray 1 Si(111) or (220) MAD M x-ray 1 1.1 1.0 0.92 1.0 0.9194 1.0 0.9273 1.0 0.9020 1.0 X25 NSLS 1.1 SYNCHROTRON NSLS BEAMLINE X25 X25 NSLS 0.92, 0.9194, 0.9273, 0.9020 SYNCHROTRON NSLS BEAMLINE X25 22620.477 ai5g group II Self-splicing intron domain 5 and 6 1 syn polymer 24.305 MAGNESIUM ION 2 syn non-polymer no no GUCUACCUAUCGGGCUAAGGAGCCGUAUGCGAUGAAAGUCGCACGUACGGUUCUAUGCCCGGGGGAAAAC GUCUACCUAUCGGGCUAAGGAGCCGUAUGCGAUGAAAGUCGCACGUACGGUUCUAUGCCCGGGGGAAAAC 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 2 6.23 80.26 VAPOR DIFFUSION, SITTING DROP 7.0 HEPES-KOH, magnesium chloride, ammonium sulfate, spermine, pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 298K 298 HEPES-KOH 1 MgCl 1 ammonium sulfate 1 spermine 1 5.879 4 24 A 4 A 66 -101.729 A_U4:A66_A 1 -1.911 4.230 -0.280 -2.149 0.619 9 11 A 5 A 65 1.330 A_A5:G65_A 2 -1.878 -6.932 -0.179 -3.824 8.932 1 19 A 6 A 64 1.362 A_C6:G64_A 3 -4.482 0.146 -0.205 -0.215 8.109 1 19 A 7 A 63 0.077 A_C7:G63_A 4 -6.891 0.119 -0.198 -0.343 1.966 1 28 A 8 A 62 2.933 A_U8:G62_A 5 -5.539 2.542 -0.091 -0.831 14.355 1 19 A 11 A 61 5.205 A_C11:G61_A 6 -11.721 1.002 -0.838 -0.226 -4.930 1 19 A 12 A 60 1.047 A_G12:C60_A 7 -8.061 0.780 0.372 -0.198 4.228 1 19 A 13 A 59 -9.729 A_G13:C59_A 8 -9.554 -0.696 0.551 -0.566 -5.940 1 19 A 14 A 58 -1.762 A_G14:C58_A 9 -12.988 -0.105 0.017 -0.273 -4.503 1 19 A 15 A 57 0.103 A_C15:G57_A 10 -4.722 0.254 0.163 -0.322 -10.343 4 24 A 16 A 55 -81.193 A_U16:A55_A 11 1.395 4.259 0.574 -2.248 4.103 9 A 18 A 17 -15.928 A_A18:A17_A 12 -14.209 -7.651 0.076 0.505 6.393 1 28 A 19 A 54 9.368 A_G19:U54_A 13 -16.925 -2.787 0.792 -0.745 0.368 1 19 A 20 A 53 -14.116 A_G20:C53_A 14 -21.431 -0.712 -0.088 -0.657 4.808 1 20 A 21 A 52 -2.027 A_A21:U52_A 15 -17.126 1.306 0.435 -0.398 4.458 28 A 22 A 51 -6.650 A_G22:U51_A 16 -12.474 -1.671 0.664 -0.058 11.385 1 A 23 A 50 11.967 A_C23:G50_A 17 -17.521 1.581 0.292 0.186 6.002 1 A 24 A 49 -1.472 A_C24:G49_A 18 -25.479 1.727 0.694 -0.509 -0.698 1 19 A 25 A 48 -11.780 A_G25:C48_A 19 -7.887 -0.515 0.648 -0.500 -4.315 1 20 A 26 A 47 4.587 A_U26:A47_A 20 1.912 -0.300 0.379 0.129 9.671 1 20 A 27 A 46 2.876 A_A27:U46_A 21 -5.264 0.720 0.960 -0.027 2.128 1 28 A 28 A 45 1.370 A_U28:G45_A 22 -12.869 2.227 0.683 -0.742 -3.547 1 19 A 29 A 42 -3.002 A_G29:C42_A 23 0.807 0.383 0.073 -0.217 0.793 1 19 A 30 A 41 2.551 A_C30:G41_A 24 -8.564 0.457 -0.095 -0.200 -13.409 1 19 A 31 A 40 10.934 A_G31:C40_A 25 -11.282 -0.010 -0.550 0.150 -2.860 1 20 A 32 A 39 4.093 A_A32:U39_A 26 -9.424 0.459 -0.262 -0.059 -3.416 1 28 A 33 A 38 2.011 A_U33:G38_A 27 1.693 2.284 0.022 -0.733 17.304 A 34 A 37 -17.838 A_G34:A37_A 28 3.464 6.820 0.023 -5.031 4.252 -11.585 A A 4 5 -16.190 A A 66 65 3.425 3.200 4.948 0.006 AA_U4A5:G65A66_AA 1 -2.445 -12.369 -10.865 -5.433 20.381 3.182 61.186 A A 5 6 2.356 A A 65 64 3.195 2.398 0.443 -0.446 AA_A5C6:G64G65_AA 2 0.807 -0.793 61.138 -0.549 -0.397 3.042 27.665 A A 6 7 7.888 A A 64 63 3.396 3.760 0.116 -2.445 AA_C6C7:G63G64_AA 3 0.528 -1.107 27.408 -6.015 -0.117 3.358 41.143 A A 7 8 6.111 A A 63 62 3.490 4.286 0.147 -1.176 AA_C7U8:G62G63_AA 4 1.287 -1.835 40.910 -2.161 -0.062 2.174 46.853 A A 8 11 10.911 A A 62 61 3.063 8.530 -2.106 -1.071 AA_U8C11:G61G62_AA 5 12.884 -16.480 44.367 -1.931 3.530 3.079 35.530 A A 11 12 20.173 A A 61 60 3.654 11.945 -0.937 -1.482 AA_C11G12:C60G61_AA 6 -9.154 15.459 32.280 -4.318 0.087 2.464 19.746 A A 12 13 6.622 A A 60 59 2.722 2.263 0.519 -2.421 AA_G12G13:C59C60_AA 7 1.736 -5.080 19.541 -7.923 -0.852 2.695 38.828 A A 13 14 16.956 A A 59 58 3.309 11.069 1.095 -2.262 AA_G13G14:C58C59_AA 8 6.870 -10.523 36.657 -4.680 -0.855 2.561 31.774 A A 14 15 10.342 A A 58 57 2.944 5.618 -1.137 -2.670 AA_G14C15:G57C58_AA 9 -4.160 7.659 31.015 -5.754 1.427 3.416 71.653 A A 15 16 4.371 A A 57 55 3.488 5.114 -2.762 -2.150 AA_C15U16:A55G57_AA 10 -2.046 1.749 71.469 -2.020 2.287 1.523 -24.193 A A 16 18 23.225 A A 55 17 2.657 -7.873 -0.882 -1.213 AA_U16A18:A17A55_AA 11 20.261 59.770 -10.687 5.135 3.663 3.478 52.885 A A 18 19 0.262 A A 17 54 3.514 0.233 0.922 1.968 AA_A18G19:U54A17_AA 12 -2.474 2.779 52.830 2.193 -1.206 2.783 45.229 A A 19 20 15.607 A A 54 53 3.389 11.873 -0.146 -1.965 AA_G19G20:C53U54_AA 13 1.775 -2.333 43.688 -3.574 0.342 3.000 43.764 A A 20 21 3.999 A A 53 52 3.103 2.978 0.620 -1.934 AA_G20A21:U52C53_AA 14 2.409 -3.235 43.604 -2.860 -0.618 1.179 15.960 A A 21 22 33.586 A A 52 51 2.918 8.791 0.347 -2.332 AA_A21G22:U51U52_AA 15 1.639 -6.261 13.233 -12.820 -0.424 3.202 40.771 A A 22 23 2.263 A A 51 50 3.154 1.573 1.016 -0.980 AA_G22C23:G50U51_AA 16 4.322 -6.216 40.521 -1.576 -0.994 2.872 38.904 A A 23 24 11.227 A A 50 49 3.269 7.434 -0.426 -1.768 AA_C23C24:G49G50_AA 17 1.323 -1.998 38.192 -3.510 0.792 2.821 14.830 A A 24 25 9.989 A A 49 48 3.258 2.528 -0.495 -2.309 AA_C24G25:C48G49_AA 18 -4.305 17.010 13.968 -11.003 -1.587 2.670 32.761 A A 25 26 14.948 A A 48 47 3.290 8.336 0.123 -2.084 AA_G25U26:A47C48_AA 19 2.419 -4.337 31.621 -5.028 0.169 1.781 38.653 A A 26 27 17.968 A A 47 46 2.439 11.693 0.032 -1.819 AA_U26A27:U46A47_AA 20 -4.565 7.014 36.632 -3.703 -0.422 3.353 40.397 A A 27 28 -1.681 A A 46 45 3.299 -1.161 0.182 -1.965 AA_A27U28:G45U46_AA 21 0.283 -0.410 40.380 -2.713 -0.231 0.951 15.977 A A 28 29 31.556 A A 45 42 2.802 8.339 -3.041 -2.995 AA_U28G29:C42G45_AA 22 -0.611 2.311 13.626 -14.560 10.663 2.574 30.835 A A 29 30 17.124 A A 42 41 3.231 8.945 0.086 -1.671 AA_G29C30:G41C42_AA 23 -4.695 8.988 29.171 -4.735 -0.998 2.882 29.820 A A 30 31 19.251 A A 41 40 3.686 9.718 -0.261 -1.787 AA_C30G31:C40G41_AA 24 2.815 -5.577 28.087 -5.569 1.115 3.023 33.359 A A 31 32 6.123 A A 40 39 3.182 3.507 -0.264 -1.489 AA_G31A32:U39C40_AA 25 -1.979 3.456 33.122 -3.149 0.147 3.095 36.892 A A 32 33 9.505 A A 39 38 3.346 5.990 0.294 -1.280 AA_A32U33:G38U39_AA 26 -1.000 1.587 36.406 -2.826 -0.599 2.316 40.086 A A 33 34 9.506 A A 38 37 2.822 6.476 -2.037 -1.457 AA_U33G34:A37G38_AA 27 4.670 -6.856 39.315 -2.712 3.395 chem_comp_atom chem_comp_bond database_2 struct_conn struct_site repository Initial release Version format compliance Version format compliance Data collection Database references Derived calculations 1 0 2002-03-22 1 1 2008-04-27 1 2 2011-07-13 1 3 2024-02-14 _database_2.pdbx_DOI _database_2.pdbx_database_accession _struct_conn.ptnr1_auth_comp_id _struct_conn.ptnr1_auth_seq_id _struct_conn.ptnr1_label_asym_id _struct_conn.ptnr1_label_atom_id _struct_conn.ptnr1_label_comp_id _struct_conn.ptnr1_label_seq_id _struct_conn.ptnr2_auth_comp_id _struct_conn.ptnr2_auth_seq_id _struct_conn.ptnr2_label_asym_id _struct_conn.ptnr2_label_atom_id _struct_conn.ptnr2_label_comp_id _struct_conn.ptnr2_label_seq_id _struct_site.pdbx_auth_asym_id _struct_site.pdbx_auth_comp_id _struct_site.pdbx_auth_seq_id RCSB Y RCSB 2002-01-31 REL REL MG MAGNESIUM ION THE SEQUENCE IS FROM Saccharomyces cerevisiae (yeast). in vitro transcription. sample MG2 71 2 MG MG 71 A MG2 72 2 MG MG 72 A GUA 1 n 1 G 1 A URI 2 n 2 U 2 A CYT 3 n 3 C 3 A URI 4 n 4 U 4 A ADE 5 n 5 A 5 A CYT 6 n 6 C 6 A CYT 7 n 7 C 7 A URI 8 n 8 U 8 A ADE 9 n 9 A 9 A URI 10 n 10 U 10 A CYT 11 n 11 C 11 A GUA 12 n 12 G 12 A GUA 13 n 13 G 13 A GUA 14 n 14 G 14 A CYT 15 n 15 C 15 A URI 16 n 16 U 16 A ADE 17 n 17 A 17 A ADE 18 n 18 A 18 A GUA 19 n 19 G 19 A GUA 20 n 20 G 20 A ADE 21 n 21 A 21 A GUA 22 n 22 G 22 A CYT 23 n 23 C 23 A CYT 24 n 24 C 24 A GUA 25 n 25 G 25 A URI 26 n 26 U 26 A ADE 27 n 27 A 27 A URI 28 n 28 U 28 A GUA 29 n 29 G 29 A CYT 30 n 30 C 30 A GUA 31 n 31 G 31 A ADE 32 n 32 A 32 A URI 33 n 33 U 33 A GUA 34 n 34 G 34 A ADE 35 n 35 A 35 A ADE 36 n 36 A 36 A ADE 37 n 37 A 37 A GUA 38 n 38 G 38 A URI 39 n 39 U 39 A CYT 40 n 40 C 40 A GUA 41 n 41 G 41 A CYT 42 n 42 C 42 A ADE 43 n 43 A 43 A CYT 44 n 44 C 44 A GUA 45 n 45 G 45 A URI 46 n 46 U 46 A ADE 47 n 47 A 47 A CYT 48 n 48 C 48 A GUA 49 n 49 G 49 A GUA 50 n 50 G 50 A URI 51 n 51 U 51 A URI 52 n 52 U 52 A CYT 53 n 53 C 53 A URI 54 n 54 U 54 A ADE 55 n 55 A 55 A URI 56 n 56 U 56 A GUA 57 n 57 G 57 A CYT 58 n 58 C 58 A CYT 59 n 59 C 59 A CYT 60 n 60 C 60 A GUA 61 n 61 G 61 A GUA 62 n 62 G 62 A GUA 63 n 63 G 63 A GUA 64 n 64 G 64 A GUA 65 n 65 G 65 A ADE 66 n 66 A 66 A ADE 67 n 67 A 67 A ADE 68 n 68 A 68 A ADE 69 n 69 A 69 A CYT 70 n 70 C 70 A author_defined_assembly 1 monomeric A C 53 A O3' C 53 1_555 A MG 71 B MG MG 1_555 A U 54 A OP1 U 54 1_555 60.0 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 1_555 x,y,z identity operation 0.0000000000 0.0000000000 0.0000000000 1 A A 9 0.055 SIDE CHAIN 1 A G 34 0.062 SIDE CHAIN 0.2680000 0.2476000 0.2497000 0.2497000 3.0 30 1031 12289 10014 81.5 random 1 FREE R 0.0 MAD Engh & Huber 3.0 30 0 1499 2 1497 0 0.4421000 0.4186000 3.11 46 51.3 3.0 30 1KXK 12289 10014 2.0 2.0 0.0540000 1,2 23.4 15.5 81.5 3.00 3.11 3.0 0.4300000 51.7 refinement CNS data reduction DENZO data scaling SCALEPACK phasing CNS Crystal Structure of a RNA Molecule Containing Domain 5 and 6 of the Yeast ai5g Group II Self-splicing Intron 1 N N 2 N N 2 N N metalc 2.788 A C 53 A O3' C 53 1_555 A MG 71 B MG MG 1_555 metalc 2.033 A U 54 A OP1 U 54 1_555 A MG 71 B MG MG 1_555 hydrog REVERSED HOOGSTEEN A U 4 A N3 U 4 1_555 A A 66 A N7 A 66 1_555 hydrog REVERSED HOOGSTEEN A U 4 A O2 U 4 1_555 A A 66 A N6 A 66 1_555 hydrog TYPE_11_PAIR A A 5 A N6 A 5 1_555 A G 65 A N3 G 65 1_555 hydrog TYPE_11_PAIR A A 5 A N7 A 5 1_555 A G 65 A N2 G 65 1_555 hydrog WATSON-CRICK A C 6 A N3 C 6 1_555 A G 64 A N1 G 64 1_555 hydrog WATSON-CRICK A C 6 A N4 C 6 1_555 A G 64 A O6 G 64 1_555 hydrog WATSON-CRICK A C 6 A O2 C 6 1_555 A G 64 A N2 G 64 1_555 hydrog WATSON-CRICK A C 7 A N3 C 7 1_555 A G 63 A N1 G 63 1_555 hydrog WATSON-CRICK A C 7 A N4 C 7 1_555 A G 63 A O6 G 63 1_555 hydrog WATSON-CRICK A C 7 A O2 C 7 1_555 A G 63 A N2 G 63 1_555 hydrog TYPE_28_PAIR A U 8 A N3 U 8 1_555 A G 62 A O6 G 62 1_555 hydrog TYPE_28_PAIR A U 8 A O2 U 8 1_555 A G 62 A N1 G 62 1_555 hydrog WATSON-CRICK A C 11 A N3 C 11 1_555 A G 61 A N1 G 61 1_555 hydrog WATSON-CRICK A C 11 A N4 C 11 1_555 A G 61 A O6 G 61 1_555 hydrog WATSON-CRICK A C 11 A O2 C 11 1_555 A G 61 A N2 G 61 1_555 hydrog WATSON-CRICK A G 12 A N1 G 12 1_555 A C 60 A N3 C 60 1_555 hydrog WATSON-CRICK A G 12 A N2 G 12 1_555 A C 60 A O2 C 60 1_555 hydrog WATSON-CRICK A G 12 A O6 G 12 1_555 A C 60 A N4 C 60 1_555 hydrog WATSON-CRICK A G 13 A N1 G 13 1_555 A C 59 A N3 C 59 1_555 hydrog WATSON-CRICK A G 13 A N2 G 13 1_555 A C 59 A O2 C 59 1_555 hydrog WATSON-CRICK A G 13 A O6 G 13 1_555 A C 59 A N4 C 59 1_555 hydrog WATSON-CRICK A G 14 A N1 G 14 1_555 A C 58 A N3 C 58 1_555 hydrog WATSON-CRICK A G 14 A N2 G 14 1_555 A C 58 A O2 C 58 1_555 hydrog WATSON-CRICK A G 14 A O6 G 14 1_555 A C 58 A N4 C 58 1_555 hydrog WATSON-CRICK A C 15 A N3 C 15 1_555 A G 57 A N1 G 57 1_555 hydrog WATSON-CRICK A C 15 A N4 C 15 1_555 A G 57 A O6 G 57 1_555 hydrog WATSON-CRICK A C 15 A O2 C 15 1_555 A G 57 A N2 G 57 1_555 hydrog REVERSED HOOGSTEEN A U 16 A N3 U 16 1_555 A A 55 A N7 A 55 1_555 hydrog REVERSED HOOGSTEEN A U 16 A O2 U 16 1_555 A A 55 A N6 A 55 1_555 hydrog A-A MISPAIR A A 17 A N3 A 17 1_555 A A 18 A N6 A 18 1_555 hydrog TYPE_28_PAIR A G 19 A N1 G 19 1_555 A U 54 A O2 U 54 1_555 hydrog TYPE_28_PAIR A G 19 A O6 G 19 1_555 A U 54 A N3 U 54 1_555 hydrog WATSON-CRICK A G 20 A N1 G 20 1_555 A C 53 A N3 C 53 1_555 hydrog WATSON-CRICK A G 20 A N2 G 20 1_555 A C 53 A O2 C 53 1_555 hydrog WATSON-CRICK A G 20 A O6 G 20 1_555 A C 53 A N4 C 53 1_555 hydrog WATSON-CRICK A A 21 A N1 A 21 1_555 A U 52 A N3 U 52 1_555 hydrog WATSON-CRICK A A 21 A N6 A 21 1_555 A U 52 A O4 U 52 1_555 hydrog TYPE_28_PAIR A G 22 A N1 G 22 1_555 A U 51 A O2 U 51 1_555 hydrog TYPE_28_PAIR A G 22 A O6 G 22 1_555 A U 51 A N3 U 51 1_555 hydrog C-G PAIR A C 23 A O2 C 23 1_555 A G 50 A N1 G 50 1_555 hydrog C-G PAIR A C 24 A O2 C 24 1_555 A G 49 A N1 G 49 1_555 hydrog WATSON-CRICK A G 25 A N1 G 25 1_555 A C 48 A N3 C 48 1_555 hydrog WATSON-CRICK A G 25 A N2 G 25 1_555 A C 48 A O2 C 48 1_555 hydrog WATSON-CRICK A G 25 A O6 G 25 1_555 A C 48 A N4 C 48 1_555 hydrog WATSON-CRICK A U 26 A N3 U 26 1_555 A A 47 A N1 A 47 1_555 hydrog WATSON-CRICK A U 26 A O4 U 26 1_555 A A 47 A N6 A 47 1_555 hydrog WATSON-CRICK A A 27 A N1 A 27 1_555 A U 46 A N3 U 46 1_555 hydrog WATSON-CRICK A A 27 A N6 A 27 1_555 A U 46 A O4 U 46 1_555 hydrog TYPE_28_PAIR A U 28 A N3 U 28 1_555 A G 45 A O6 G 45 1_555 hydrog TYPE_28_PAIR A U 28 A O2 U 28 1_555 A G 45 A N1 G 45 1_555 hydrog WATSON-CRICK A G 29 A N1 G 29 1_555 A C 42 A N3 C 42 1_555 hydrog WATSON-CRICK A G 29 A N2 G 29 1_555 A C 42 A O2 C 42 1_555 hydrog WATSON-CRICK A G 29 A O6 G 29 1_555 A C 42 A N4 C 42 1_555 hydrog WATSON-CRICK A C 30 A N3 C 30 1_555 A G 41 A N1 G 41 1_555 hydrog WATSON-CRICK A C 30 A N4 C 30 1_555 A G 41 A O6 G 41 1_555 hydrog WATSON-CRICK A C 30 A O2 C 30 1_555 A G 41 A N2 G 41 1_555 hydrog WATSON-CRICK A G 31 A N1 G 31 1_555 A C 40 A N3 C 40 1_555 hydrog WATSON-CRICK A G 31 A N2 G 31 1_555 A C 40 A O2 C 40 1_555 hydrog WATSON-CRICK A G 31 A O6 G 31 1_555 A C 40 A N4 C 40 1_555 hydrog WATSON-CRICK A A 32 A N1 A 32 1_555 A U 39 A N3 U 39 1_555 hydrog WATSON-CRICK A A 32 A N6 A 32 1_555 A U 39 A O4 U 39 1_555 hydrog TYPE_28_PAIR A U 33 A N3 U 33 1_555 A G 38 A O6 G 38 1_555 hydrog TYPE_28_PAIR A U 33 A O2 U 33 1_555 A G 38 A N1 G 38 1_555 hydrog G-A MISPAIR A G 34 A N2 G 34 1_555 A A 37 A N7 A 37 1_555 RNA double helix, tetraloop, tetraloop receptor, two-nucleotide bulge, RNA 1KXK PDB 1 1KXK 1 70 1KXK 1 70 1KXK A 1 1 70 BINDING SITE FOR RESIDUE MG A 71 A MG 71 Software 2 BINDING SITE FOR RESIDUE MG A 72 A MG 72 Software 1 A C 53 A C 53 2 1_555 A U 54 A U 54 2 1_555 A G 38 A G 38 1 1_555 178 P 61 2 2