HEADER SPLICING 31-DEC-69 6AHD TITLE The Cryo-EM Structure of Human Pre-catalytic Spliceosome (B complex) TITLE 2 at 3.8 angstrom resolution COMPND MOL_ID: 18; COMPND 2 MOLECULE: Small nuclear ribonucleoprotein G; COMPND 3 CHAIN: f, n, S; EXPDTA ELECTRON MICROSCOPY REMARK 465 MISSING RESIDUES REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.) REMARK 465 REMARK 465 M RES C SSSEQI REMARK 465 ALA n 49 REMARK 465 THR n 50 REMARK 465 SER n 51 REMARK 465 GLY n 52 REMARK 465 GLN n 53 DBREF 6AHD n 1 76 UNP P62308 RUXG_HUMAN 1 76 SEQRES 1 n 73 ALA HIS PRO PRO GLU LEU LYS LYS PHE MET ASP LYS LYS SEQRES 2 n 73 LEU SER LEU LYS LEU ASN GLY GLY ARG HIS VAL GLN GLY SEQRES 3 n 73 ILE LEU ARG GLY PHE ASP PRO PHE MET ASN LEU VAL ILE SEQRES 4 n 73 ASP GLU CYS VAL GLU MET ALA THR SER GLY GLN GLN ASN SEQRES 5 n 73 ASN ILE GLY MET VAL VAL ILE ARG GLY ASN SER ILE ILE SEQRES 6 n 73 MET LEU GLU ALA LEU GLU ARG VAL ATOM 1 N ALA n 4 338.262 149.973 357.871 1.00136.88 ATOM 2 CA ALA n 4 337.329 149.081 358.599 1.00133.09 ATOM 3 C ALA n 4 336.130 148.781 357.682 1.00140.51 ATOM 4 O ALA n 4 334.990 148.728 358.140 1.00138.48 ATOM 5 N HIS n 5 336.421 148.601 356.383 1.00145.74 ATOM 6 CA HIS n 5 335.396 148.551 355.319 1.00138.99 ATOM 7 C HIS n 5 334.523 147.326 355.419 1.00125.30 ATOM 8 O HIS n 5 334.956 146.306 355.946 1.00140.08 ATOM 9 N PRO n 6 333.293 147.421 354.903 1.00114.42 ATOM 10 CA PRO n 6 332.552 146.197 354.728 1.00121.78 ATOM 11 C PRO n 6 332.934 145.527 353.408 1.00116.82 ATOM 12 O PRO n 6 333.228 146.222 352.423 1.00103.70 ATOM 13 N PRO n 7 332.947 144.188 353.394 1.00119.36 ATOM 14 CA PRO n 7 332.866 143.505 352.107 1.00135.30 ATOM 15 C PRO n 7 331.504 143.797 351.418 1.00152.59 ATOM 16 O PRO n 7 330.466 143.825 352.092 1.00156.35 ATOM 17 N GLU n 8 331.514 144.012 350.100 1.00154.50 ATOM 18 CA GLU n 8 330.298 144.328 349.354 1.00153.51 ATOM 19 C GLU n 8 329.506 143.054 349.055 1.00154.39 ATOM 20 O GLU n 8 329.563 142.514 347.942 1.00171.79 ATOM 21 N LEU n 9 328.763 142.588 350.052 1.00143.34 ATOM 22 CA LEU n 9 328.063 141.305 349.972 1.00138.52 ATOM 23 C LEU n 9 326.538 141.379 350.119 1.00141.81 ATOM 24 O LEU n 9 325.876 140.333 350.120 1.00120.61 ATOM 25 N LYS n 10 325.982 142.585 350.249 1.00135.59 ATOM 26 CA LYS n 10 324.534 142.728 350.397 1.00109.90 ATOM 27 C LYS n 10 323.825 142.108 349.226 1.00 88.91 ATOM 28 O LYS n 10 322.775 141.503 349.394 1.00 71.61 ATOM 29 N LYS n 11 324.413 142.245 348.044 1.00 99.38 ATOM 30 CA LYS n 11 323.911 141.594 346.827 1.00121.82 ATOM 31 C LYS n 11 323.709 140.072 346.958 1.00112.18 ATOM 32 O LYS n 11 322.862 139.493 346.267 1.00 73.73 ATOM 33 N PHE n 12 324.511 139.442 347.823 1.00116.88 ATOM 34 CA PHE n 12 324.527 137.982 347.990 1.00121.36 ATOM 35 C PHE n 12 323.692 137.497 349.176 1.00136.56 ATOM 36 O PHE n 12 323.446 136.284 349.312 1.00176.59 ATOM 37 N MET n 13 323.185 138.443 349.973 1.00128.61 ATOM 38 CA MET n 13 322.329 138.123 351.120 1.00117.09 ATOM 39 C MET n 13 321.096 137.266 350.771 1.00115.34 ATOM 40 O MET n 13 320.360 137.565 349.817 1.00107.18 ATOM 41 N ASP n 14 320.882 136.203 351.559 1.00115.35 ATOM 42 CA ASP n 14 319.740 135.278 351.412 1.00125.04 ATOM 43 C ASP n 14 319.714 134.522 350.067 1.00125.64 ATOM 44 O ASP n 14 318.648 134.182 349.545 1.00117.26 ATOM 45 N LYS n 15 320.904 134.310 349.505 1.00128.75 ATOM 46 CA LYS n 15 321.083 133.553 348.269 1.00128.15 ATOM 47 C LYS n 15 321.825 132.284 348.603 1.00157.67 ATOM 48 O LYS n 15 322.621 132.262 349.554 1.00177.60 ATOM 49 N LYS n 16 321.598 131.233 347.820 1.00184.14 ATOM 50 CA LYS n 16 322.370 129.999 347.981 1.00197.38 ATOM 51 C LYS n 16 323.727 130.151 347.309 1.00188.97 ATOM 52 O LYS n 16 323.814 130.634 346.167 1.00158.35 ATOM 53 N LEU n 17 324.767 129.706 348.021 1.00191.43 ATOM 54 CA LEU n 17 326.160 129.899 347.612 1.00188.36 ATOM 55 C LEU n 17 326.981 128.604 347.723 1.00182.46 ATOM 56 O LEU n 17 326.610 127.680 348.459 1.00168.74 ATOM 57 N SER n 18 328.079 128.559 346.963 1.00179.24 ATOM 58 CA SER n 18 329.059 127.466 346.999 1.00183.95 ATOM 59 C SER n 18 330.388 128.026 347.497 1.00173.49 ATOM 60 O SER n 18 330.963 128.905 346.854 1.00165.50 ATOM 61 N LEU n 19 330.873 127.516 348.635 1.00163.31 ATOM 62 CA LEU n 19 332.033 128.099 349.343 1.00155.79 ATOM 63 C LEU n 19 333.252 127.190 349.292 1.00155.53 ATOM 64 O LEU n 19 333.227 126.075 349.798 1.00150.45 ATOM 65 N LYS n 20 334.323 127.694 348.703 1.00149.33 ATOM 66 CA LYS n 20 335.576 126.981 348.643 1.00162.89 ATOM 67 C LYS n 20 336.433 127.461 349.836 1.00163.50 ATOM 68 O LYS n 20 336.737 128.652 349.965 1.00161.62 ATOM 69 N LEU n 21 336.801 126.528 350.711 1.00155.26 ATOM 70 CA LEU n 21 337.569 126.850 351.905 1.00163.12 ATOM 71 C LEU n 21 338.953 126.251 351.808 1.00172.87 ATOM 72 O LEU n 21 339.206 125.394 350.949 1.00177.01 ATOM 73 N ASN n 22 339.855 126.684 352.685 1.00169.42 ATOM 74 CA ASN n 22 341.205 126.146 352.641 1.00159.21 ATOM 75 C ASN n 22 341.167 124.710 353.143 1.00136.49 ATOM 76 O ASN n 22 340.205 124.282 353.768 1.00 94.00 ATOM 77 N GLY n 23 342.209 123.964 352.823 1.00154.19 ATOM 78 CA GLY n 23 342.249 122.540 353.095 1.00187.05 ATOM 79 C GLY n 23 341.542 121.720 352.021 1.00194.64 ATOM 80 O GLY n 23 341.331 120.525 352.219 1.00214.03 ATOM 81 N GLY n 24 341.181 122.346 350.894 1.00171.83 ATOM 82 CA GLY n 24 340.443 121.680 349.823 1.00174.63 ATOM 83 C GLY n 24 339.025 121.339 350.245 1.00192.75 ATOM 84 O GLY n 24 338.410 120.369 349.754 1.00226.88 ATOM 85 N ARG n 25 338.496 122.153 351.154 1.00174.68 ATOM 86 CA ARG n 25 337.187 121.922 351.745 1.00153.53 ATOM 87 C ARG n 25 336.146 122.779 351.009 1.00144.64 ATOM 88 O ARG n 25 336.444 123.900 350.565 1.00139.53 ATOM 89 N HIS n 26 334.960 122.204 350.816 1.00130.28 ATOM 90 CA HIS n 26 333.857 122.866 350.126 1.00128.04 ATOM 91 C HIS n 26 332.510 122.630 350.843 1.00117.34 ATOM 92 O HIS n 26 332.169 121.493 351.194 1.00 94.31 ATOM 93 N VAL n 27 331.763 123.713 351.058 1.00109.91 ATOM 94 CA VAL n 27 330.421 123.645 351.649 1.00106.43 ATOM 95 C VAL n 27 329.444 124.492 350.813 1.00128.09 ATOM 96 O VAL n 27 329.874 125.359 350.037 1.00110.98 ATOM 97 N GLN n 28 328.134 124.258 350.995 1.00143.37 ATOM 98 CA GLN n 28 327.072 125.041 350.312 1.00131.22 ATOM 99 C GLN n 28 325.974 125.458 351.269 1.00112.55 ATOM 100 O GLN n 28 325.515 124.637 352.078 1.00133.31 ATOM 101 N GLY n 29 325.543 126.711 351.178 1.00100.21 ATOM 102 CA GLY n 29 324.445 127.211 352.022 1.00119.02 ATOM 103 C GLY n 29 323.994 128.642 351.723 1.00129.34 ATOM 104 O GLY n 29 324.620 129.347 350.906 1.00143.22 ATOM 105 N ILE n 30 322.970 129.094 352.452 1.00129.81 ATOM 106 CA ILE n 30 322.362 130.415 352.242 1.00146.90 ATOM 107 C ILE n 30 323.002 131.515 353.101 1.00169.69 ATOM 108 O ILE n 30 323.048 131.409 354.337 1.00206.71 ATOM 109 N LEU n 31 323.452 132.601 352.464 1.00161.89 ATOM 110 CA LEU n 31 324.097 133.687 353.209 1.00159.19 ATOM 111 C LEU n 31 323.119 134.411 354.130 1.00154.27 ATOM 112 O LEU n 31 322.161 135.015 353.656 1.00165.03 ATOM 113 N ARG n 32 323.379 134.365 355.437 1.00128.94 ATOM 114 CA ARG n 32 322.538 135.060 356.407 1.00120.30 ATOM 115 C ARG n 32 323.182 136.297 357.021 1.00105.27 ATOM 116 O ARG n 32 322.505 137.059 357.727 1.00100.85 ATOM 117 N GLY n 33 324.461 136.530 356.758 1.00101.19 ATOM 118 CA GLY n 33 325.128 137.736 357.278 1.00105.60 ATOM 119 C GLY n 33 326.644 137.702 357.284 1.00 99.86 ATOM 120 O GLY n 33 327.263 136.670 357.044 1.00 89.97 ATOM 121 N PHE n 34 327.241 138.850 357.574 1.00 94.39 ATOM 122 CA PHE n 34 328.686 139.001 357.486 1.00 90.38 ATOM 123 C PHE n 34 329.153 140.211 358.316 1.00 86.54 ATOM 124 O PHE n 34 328.341 141.072 358.704 1.00 80.87 ATOM 125 N ASP n 35 330.465 140.290 358.532 1.00 79.43 ATOM 126 CA ASP n 35 331.077 141.425 359.223 1.00 77.25 ATOM 127 C ASP n 35 332.291 141.961 358.429 1.00 80.02 ATOM 128 O ASP n 35 332.609 141.438 357.344 1.00 75.93 ATOM 129 N PRO n 36 332.958 143.008 358.948 1.00 83.05 ATOM 130 CA PRO n 36 334.081 143.548 358.161 1.00 88.50 ATOM 131 C PRO n 36 335.260 142.599 357.892 1.00 83.28 ATOM 132 O PRO n 36 336.048 142.851 356.965 1.00104.03 ATOM 133 N PHE n 37 335.409 141.545 358.692 1.00 75.66 ATOM 134 CA PHE n 37 336.485 140.536 358.503 1.00 71.45 ATOM 135 C PHE n 37 336.139 139.477 357.463 1.00 70.72 ATOM 136 O PHE n 37 336.909 138.512 357.271 1.00 60.65 ATOM 137 N MET n 38 334.953 139.620 356.884 1.00 71.64 ATOM 138 CA MET n 38 334.387 138.630 355.993 1.00 81.81 ATOM 139 C MET n 38 334.053 137.289 356.676 1.00 86.96 ATOM 140 O MET n 38 334.002 136.238 356.012 1.00 76.88 ATOM 141 N ASN n 39 333.809 137.327 357.992 1.00 84.69 ATOM 142 CA ASN n 39 333.275 136.157 358.657 1.00 79.67 ATOM 143 C ASN n 39 331.830 136.101 358.180 1.00 92.95 ATOM 144 O ASN n 39 331.190 137.136 358.044 1.00 81.84 ATOM 145 N LEU n 40 331.346 134.885 357.897 1.00109.74 ATOM 146 CA LEU n 40 329.999 134.672 357.363 1.00107.18 ATOM 147 C LEU n 40 329.109 133.876 358.290 1.00101.51 ATOM 148 O LEU n 40 329.588 133.035 359.059 1.00 93.85 ATOM 149 N VAL n 41 327.809 134.152 358.218 1.00110.14 ATOM 150 CA VAL n 41 326.781 133.242 358.736 1.00119.06 ATOM 151 C VAL n 41 326.147 132.528 357.540 1.00102.69 ATOM 152 O VAL n 41 325.654 133.176 356.627 1.00 72.71 ATOM 153 N ILE n 42 326.220 131.196 357.533 1.00112.20 ATOM 154 CA ILE n 42 325.609 130.395 356.474 1.00121.70 ATOM 155 C ILE n 42 324.577 129.445 357.036 1.00120.15 ATOM 156 O ILE n 42 324.888 128.658 357.923 1.00113.88 ATOM 157 N ASP n 43 323.351 129.532 356.513 1.00132.20 ATOM 158 CA ASP n 43 322.227 128.713 356.975 1.00141.13 ATOM 159 C ASP n 43 322.013 127.535 356.044 1.00133.80 ATOM 160 O ASP n 43 322.373 127.589 354.868 1.00 96.39 ATOM 161 N GLU n 44 321.436 126.468 356.606 1.00159.78 ATOM 162 CA GLU n 44 321.140 125.214 355.891 1.00171.91 ATOM 163 C GLU n 44 322.403 124.698 355.195 1.00149.31 ATOM 164 O GLU n 44 322.389 124.269 354.038 1.00154.44 ATOM 165 N CYS n 45 323.506 124.759 355.914 1.00124.97 ATOM 166 CA CYS n 45 324.788 124.457 355.326 1.00114.18 ATOM 167 C CYS n 45 324.968 122.954 355.134 1.00103.79 ATOM 168 O CYS n 45 324.484 122.150 355.942 1.00 99.24 ATOM 169 N VAL n 46 325.678 122.593 354.070 1.00 94.55 ATOM 170 CA VAL n 46 325.949 121.196 353.727 1.00 88.58 ATOM 171 C VAL n 46 327.430 121.031 353.395 1.00 89.32 ATOM 172 O VAL n 46 327.941 121.732 352.518 1.00 77.73 ATOM 173 N GLU n 47 328.097 120.113 354.104 1.00 98.76 ATOM 174 CA GLU n 47 329.491 119.737 353.829 1.00100.74 ATOM 175 C GLU n 47 329.583 118.812 352.615 1.00 99.76 ATOM 176 O GLU n 47 328.947 117.764 352.586 1.00 73.58 ATOM 177 N MET n 48 330.364 119.199 351.606 1.00108.74 ATOM 178 CA MET n 48 330.510 118.371 350.405 1.00110.05 ATOM 179 C MET n 48 331.786 117.579 350.595 1.00124.12 ATOM 180 O MET n 48 332.857 118.071 350.244 1.00154.34 ATOM 181 N GLN n 54 327.380 114.196 350.772 1.00148.27 ATOM 182 CA GLN n 54 327.036 115.499 351.345 1.00131.38 ATOM 183 C GLN n 54 326.246 115.339 352.626 1.00120.90 ATOM 184 O GLN n 54 325.332 114.558 352.670 1.00 92.84 ATOM 185 N ASN n 55 326.595 116.090 353.669 1.00150.03 ATOM 186 CA ASN n 55 325.941 115.954 354.977 1.00151.61 ATOM 187 C ASN n 55 325.530 117.300 355.562 1.00164.68 ATOM 188 O ASN n 55 326.305 118.284 355.546 1.00192.93 ATOM 189 N ASN n 56 324.291 117.336 356.050 1.00156.38 ATOM 190 CA ASN n 56 323.667 118.564 356.509 1.00145.46 ATOM 191 C ASN n 56 324.170 118.940 357.903 1.00132.09 ATOM 192 O ASN n 56 324.144 118.124 358.833 1.00134.76 ATOM 193 N ILE n 57 324.670 120.165 358.025 1.00110.55 ATOM 194 CA ILE n 57 325.276 120.636 359.274 1.00106.36 ATOM 195 C ILE n 57 324.503 121.809 359.897 1.00108.05 ATOM 196 O ILE n 57 324.829 122.256 361.008 1.00105.94 ATOM 197 N GLY n 58 323.464 122.289 359.208 1.00119.30 ATOM 198 CA GLY n 58 322.618 123.372 359.724 1.00128.43 ATOM 199 C GLY n 58 323.218 124.750 359.572 1.00125.14 ATOM 200 O GLY n 58 323.967 125.008 358.630 1.00105.03 ATOM 201 N MET n 59 322.879 125.648 360.498 1.00141.93 ATOM 202 CA MET n 59 323.376 127.020 360.439 1.00165.36 ATOM 203 C MET n 59 324.732 127.126 361.129 1.00163.74 ATOM 204 O MET n 59 324.894 126.678 362.268 1.00146.06 ATOM 205 N VAL n 60 325.680 127.755 360.430 1.00161.89 ATOM 206 CA VAL n 60 327.085 127.754 360.820 1.00151.32 ATOM 207 C VAL n 60 327.773 129.116 360.641 1.00146.76 ATOM 208 O VAL n 60 327.265 130.001 359.940 1.00142.36 ATOM 209 N VAL n 61 328.937 129.256 361.296 1.00143.67 ATOM 210 CA VAL n 61 329.842 130.411 361.154 1.00128.76 ATOM 211 C VAL n 61 331.103 130.001 360.397 1.00114.54 ATOM 212 O VAL n 61 331.819 129.075 360.809 1.00 79.41 ATOM 213 N ILE n 62 331.391 130.712 359.318 1.00125.08 ATOM 214 CA ILE n 62 332.659 130.560 358.614 1.00129.71 ATOM 215 C ILE n 62 333.525 131.803 358.818 1.00121.58 ATOM 216 O ILE n 62 333.135 132.907 358.397 1.00143.28 ATOM 217 N ARG n 63 334.701 131.593 359.405 1.00100.09 ATOM 218 CA ARG n 63 335.707 132.640 359.588 1.00103.89 ATOM 219 C ARG n 63 336.376 133.076 358.252 1.00114.19 ATOM 220 O ARG n 63 336.892 132.227 357.471 1.00154.26 ATOM 221 N GLY n 64 336.330 134.396 357.987 1.00 89.56 ATOM 222 CA GLY n 64 336.700 134.993 356.686 1.00 75.35 ATOM 223 C GLY n 64 338.137 134.734 356.315 1.00 73.30 ATOM 224 O GLY n 64 338.490 134.560 355.137 1.00 61.18 ATOM 225 N ASN n 65 338.951 134.671 357.349 1.00 72.25 ATOM 226 CA ASN n 65 340.290 134.159 357.247 1.00 78.94 ATOM 227 C ASN n 65 340.438 132.968 356.274 1.00 74.57 ATOM 228 O ASN n 65 341.272 132.993 355.372 1.00 68.28 ATOM 229 N SER n 66 339.629 131.918 356.481 1.00 80.27 ATOM 230 CA SER n 66 339.739 130.622 355.743 1.00 80.01 ATOM 231 C SER n 66 338.833 130.488 354.481 1.00 85.22 ATOM 232 O SER n 66 338.769 129.398 353.856 1.00 71.48 ATOM 233 N ILE n 67 338.202 131.604 354.081 1.00 87.48 ATOM 234 CA ILE n 67 337.401 131.695 352.848 1.00 83.38 ATOM 235 C ILE n 67 338.255 131.988 351.635 1.00101.61 ATOM 236 O ILE n 67 338.869 133.061 351.560 1.00 95.97 ATOM 237 N ILE n 68 338.352 131.017 350.720 1.00125.62 ATOM 238 CA ILE n 68 339.161 131.188 349.504 1.00143.14 ATOM 239 C ILE n 68 338.328 131.934 348.474 1.00133.58 ATOM 240 O ILE n 68 338.756 132.951 347.922 1.00115.08 ATOM 241 N MET n 69 337.144 131.400 348.236 1.00135.84 ATOM 242 CA MET n 69 336.305 131.835 347.135 1.00166.60 ATOM 243 C MET n 69 334.864 131.450 347.423 1.00172.08 ATOM 244 O MET n 69 334.597 130.396 348.005 1.00167.92 ATOM 245 N LEU n 70 333.947 132.302 346.973 1.00165.84 ATOM 246 CA LEU n 70 332.545 131.936 346.926 1.00153.53 ATOM 247 C LEU n 70 331.975 132.158 345.532 1.00140.76 ATOM 248 O LEU n 70 332.449 133.014 344.769 1.00118.88 ATOM 249 N GLU n 71 330.975 131.334 345.227 1.00146.46 ATOM 250 CA GLU n 71 330.282 131.304 343.944 1.00155.66 ATOM 251 C GLU n 71 328.786 131.238 344.218 1.00158.41 ATOM 252 O GLU n 71 328.338 130.392 344.987 1.00156.17 ATOM 253 N ALA n 72 328.015 132.130 343.602 1.00160.32 ATOM 254 CA ALA n 72 326.563 132.099 343.766 1.00166.69 ATOM 255 C ALA n 72 325.974 130.970 342.930 1.00186.26 ATOM 256 O ALA n 72 326.383 130.758 341.781 1.00197.16 ATOM 257 N LEU n 73 325.017 130.242 343.517 1.00188.86 ATOM 258 CA LEU n 73 324.254 129.216 342.797 1.00184.38 ATOM 259 C LEU n 73 322.928 129.798 342.279 1.00190.87 ATOM 260 O LEU n 73 322.127 129.101 341.647 1.00211.58 ATOM 261 N GLU n 74 322.730 131.088 342.553 1.00191.33 ATOM 262 CA GLU n 74 321.571 131.860 342.123 1.00174.49 ATOM 263 C GLU n 74 322.004 132.959 341.152 1.00173.71 ATOM 264 O GLU n 74 323.193 133.126 340.865 1.00157.64 ATOM 265 N ARG n 75 321.035 133.708 340.638 1.00176.33 ATOM 266 CA ARG n 75 321.324 134.922 339.902 1.00168.87 ATOM 267 C ARG n 75 321.121 136.111 340.835 1.00150.09 ATOM 268 O ARG n 75 320.074 136.235 341.480 1.00136.48 ATOM 269 N VAL n 76 322.139 136.962 340.922 1.00152.07 ATOM 270 CA VAL n 76 322.071 138.208 341.709 1.00161.97 ATOM 271 C VAL n 76 321.646 139.403 340.844 1.00167.80 ATOM 272 O VAL n 76 321.231 140.460 341.345 1.00175.88 TER