HEADER SPLICING 31-DEC-69 6AH0 TITLE The Cryo-EM Structure of the Precusor of Human Pre-catalytic TITLE 2 Spliceosome (pre-B complex) COMPND MOL_ID: 18; COMPND 2 MOLECULE: U6 snRNA-associated Sm-like protein LSm8; COMPND 3 CHAIN: z; 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 VAL z 45 REMARK 465 PHE z 46 REMARK 465 SER z 47 REMARK 465 SER z 48 REMARK 465 SER z 49 REMARK 465 GLN z 50 REMARK 465 GLY z 51 REMARK 465 VAL z 52 REMARK 465 GLU z 53 DBREF 6AH0 z 1 96 UNP O95777 LSM8_HUMAN 1 96 SEQRES 1 z 70 ALA LEU GLU ASN TYR ILE ASN ARG THR VAL ALA VAL ILE SEQRES 2 z 70 THR SER ASP GLY ARG MET ILE VAL GLY THR LEU LYS GLY SEQRES 3 z 70 PHE ASP GLN THR ILE ASN LEU ILE LEU ASP GLU SER HIS SEQRES 4 z 70 GLU ARG VAL PHE SER SER SER GLN GLY VAL GLU GLN VAL SEQRES 5 z 70 VAL LEU GLY LEU TYR ILE VAL ARG GLY ASP ASN VAL ALA SEQRES 6 z 70 VAL ILE GLY GLU ILE ATOM 1 N ALA z 4 378.556 361.539 346.466 1.00 66.94 ATOM 2 CA ALA z 4 379.598 360.665 345.918 1.00 67.70 ATOM 3 C ALA z 4 380.957 361.108 346.457 1.00 67.94 ATOM 4 O ALA z 4 381.208 362.293 346.615 1.00 69.73 ATOM 5 N LEU z 5 381.818 360.151 346.779 1.00 65.76 ATOM 6 CA LEU z 5 383.146 360.457 347.298 1.00 65.85 ATOM 7 C LEU z 5 384.143 360.664 346.189 1.00 68.43 ATOM 8 O LEU z 5 385.340 360.696 346.455 1.00 67.72 ATOM 9 N GLU z 6 383.655 360.792 344.957 1.00 63.88 ATOM 10 CA GLU z 6 384.540 360.820 343.799 1.00 65.94 ATOM 11 C GLU z 6 385.555 361.973 343.832 1.00 66.46 ATOM 12 O GLU z 6 386.717 361.770 343.520 1.00 66.98 ATOM 13 N ASN z 7 385.142 363.156 344.267 1.00 96.35 ATOM 14 CA ASN z 7 386.054 364.292 344.280 1.00 97.27 ATOM 15 C ASN z 7 387.232 364.093 345.242 1.00 94.95 ATOM 16 O ASN z 7 388.154 364.913 345.281 1.00 96.26 ATOM 17 N TYR z 8 387.206 363.004 346.008 1.00 80.90 ATOM 18 CA TYR z 8 388.208 362.788 347.052 1.00 79.11 ATOM 19 C TYR z 8 389.295 361.780 346.680 1.00 80.02 ATOM 20 O TYR z 8 390.318 361.706 347.357 1.00 79.76 ATOM 21 N ILE z 9 389.052 360.981 345.641 1.00 65.05 ATOM 22 CA ILE z 9 390.056 360.042 345.109 1.00 67.15 ATOM 23 C ILE z 9 391.481 360.621 345.016 1.00 69.04 ATOM 24 O ILE z 9 391.690 361.742 344.540 1.00 70.46 ATOM 25 N ASN z 10 392.446 359.842 345.498 1.00 80.52 ATOM 26 CA ASN z 10 393.868 360.203 345.486 1.00 82.91 ATOM 27 C ASN z 10 394.274 361.417 346.322 1.00 82.02 ATOM 28 O ASN z 10 395.448 361.735 346.423 1.00 84.47 ATOM 29 N ARG z 11 393.309 362.096 346.920 1.00 80.33 ATOM 30 CA ARG z 11 393.607 363.197 347.814 1.00 80.33 ATOM 31 C ARG z 11 393.756 362.675 349.236 1.00 78.87 ATOM 32 O ARG z 11 393.348 361.557 349.536 1.00 77.42 ATOM 33 N THR z 12 394.372 363.466 350.109 1.00 75.62 ATOM 34 CA THR z 12 394.437 363.106 351.535 1.00 75.11 ATOM 35 C THR z 12 393.135 363.485 352.224 1.00 72.80 ATOM 36 O THR z 12 392.484 364.485 351.891 1.00 72.60 ATOM 37 N VAL z 13 392.775 362.673 353.203 1.00 73.03 ATOM 38 CA VAL z 13 391.522 362.808 353.897 1.00 70.92 ATOM 39 C VAL z 13 391.673 362.605 355.396 1.00 72.52 ATOM 40 O VAL z 13 392.651 361.987 355.883 1.00 74.79 ATOM 41 N ALA z 14 390.694 363.177 356.095 1.00 68.00 ATOM 42 CA ALA z 14 390.432 362.967 357.500 1.00 70.00 ATOM 43 C ALA z 14 389.311 361.958 357.538 1.00 67.15 ATOM 44 O ALA z 14 388.358 362.048 356.767 1.00 64.34 ATOM 45 N VAL z 15 389.418 360.997 358.439 1.00 68.66 ATOM 46 CA VAL z 15 388.401 359.975 358.550 1.00 66.40 ATOM 47 C VAL z 15 387.989 359.898 359.996 1.00 69.26 ATOM 48 O VAL z 15 388.839 359.769 360.863 1.00 73.60 ATOM 49 N ILE z 16 386.694 360.022 360.266 1.00 69.36 ATOM 50 CA ILE z 16 386.196 359.769 361.609 1.00 72.14 ATOM 51 C ILE z 16 385.351 358.521 361.644 1.00 70.23 ATOM 52 O ILE z 16 384.384 358.383 360.886 1.00 66.99 ATOM 53 N THR z 17 385.753 357.614 362.521 1.00 82.69 ATOM 54 CA THR z 17 385.069 356.359 362.708 1.00 82.78 ATOM 55 C THR z 17 383.916 356.568 363.672 1.00 84.00 ATOM 56 O THR z 17 383.908 357.546 364.420 1.00 86.12 ATOM 57 N SER z 18 382.952 355.651 363.670 1.00 67.31 ATOM 58 CA SER z 18 381.759 355.812 364.490 1.00 68.79 ATOM 59 C SER z 18 382.126 355.865 365.968 1.00 73.58 ATOM 60 O SER z 18 381.480 356.568 366.752 1.00 75.25 ATOM 61 N ASP z 19 383.174 355.132 366.343 1.00117.84 ATOM 62 CA ASP z 19 383.625 355.086 367.734 1.00123.41 ATOM 63 C ASP z 19 384.392 356.336 368.153 1.00125.48 ATOM 64 O ASP z 19 384.962 356.396 369.246 1.00130.32 ATOM 65 N GLY z 20 384.403 357.329 367.273 1.00107.49 ATOM 66 CA GLY z 20 385.019 358.608 367.564 1.00109.69 ATOM 67 C GLY z 20 386.519 358.644 367.323 1.00112.07 ATOM 68 O GLY z 20 387.174 359.653 367.594 1.00114.72 ATOM 69 N ARG z 21 387.076 357.549 366.818 1.00138.75 ATOM 70 CA ARG z 21 388.498 357.532 366.487 1.00141.32 ATOM 71 C ARG z 21 388.763 358.385 365.255 1.00137.71 ATOM 72 O ARG z 21 387.832 358.729 364.526 1.00132.37 ATOM 73 N MET z 22 390.031 358.723 365.030 1.00128.91 ATOM 74 CA MET z 22 390.404 359.572 363.901 1.00125.58 ATOM 75 C MET z 22 391.628 359.101 363.122 1.00125.36 ATOM 76 O MET z 22 392.683 358.840 363.693 1.00130.51 ATOM 77 N ILE z 23 391.462 359.017 361.807 1.00 72.10 ATOM 78 CA ILE z 23 392.534 358.634 360.887 1.00 71.68 ATOM 79 C ILE z 23 392.900 359.732 359.874 1.00 69.21 ATOM 80 O ILE z 23 392.087 360.611 359.585 1.00 66.51 ATOM 81 N VAL z 24 394.120 359.669 359.338 1.00 72.12 ATOM 82 CA VAL z 24 394.514 360.498 358.198 1.00 70.06 ATOM 83 C VAL z 24 395.068 359.612 357.101 1.00 69.24 ATOM 84 O VAL z 24 396.033 358.882 357.341 1.00 72.71 ATOM 85 N GLY z 25 394.514 359.677 355.893 1.00 67.35 ATOM 86 CA GLY z 25 395.060 358.802 354.863 1.00 68.23 ATOM 87 C GLY z 25 394.931 359.302 353.428 1.00 66.64 ATOM 88 O GLY z 25 394.358 360.340 353.161 1.00 64.58 ATOM 89 N THR z 26 395.504 358.555 352.496 1.00 76.19 ATOM 90 CA THR z 26 395.176 358.747 351.094 1.00 75.19 ATOM 91 C THR z 26 393.988 357.845 350.711 1.00 73.36 ATOM 92 O THR z 26 394.062 356.616 350.804 1.00 75.20 ATOM 93 N LEU z 27 392.885 358.456 350.292 1.00 64.24 ATOM 94 CA LEU z 27 391.735 357.682 349.829 1.00 63.12 ATOM 95 C LEU z 27 391.923 357.147 348.424 1.00 65.47 ATOM 96 O LEU z 27 391.925 357.924 347.452 1.00 65.70 ATOM 97 N LYS z 28 392.052 355.831 348.300 1.00 73.09 ATOM 98 CA LYS z 28 392.320 355.260 346.985 1.00 76.09 ATOM 99 C LYS z 28 391.120 354.642 346.305 1.00 76.09 ATOM 100 O LYS z 28 390.808 354.975 345.175 1.00 76.48 ATOM 101 N GLY z 29 390.432 353.765 347.010 1.00 70.44 ATOM 102 CA GLY z 29 389.218 353.154 346.506 1.00 70.50 ATOM 103 C GLY z 29 388.037 353.347 347.437 1.00 68.27 ATOM 104 O GLY z 29 388.214 353.593 348.622 1.00 67.04 ATOM 105 N PHE z 30 386.828 353.232 346.898 1.00 67.80 ATOM 106 CA PHE z 30 385.617 353.299 347.707 1.00 65.79 ATOM 107 C PHE z 30 384.491 352.674 346.935 1.00 64.51 ATOM 108 O PHE z 30 384.389 352.876 345.739 1.00 64.58 ATOM 109 N ASP z 31 383.644 351.916 347.625 1.00 67.36 ATOM 110 CA ASP z 31 382.491 351.287 346.988 1.00 65.54 ATOM 111 C ASP z 31 381.141 351.883 347.417 1.00 62.51 ATOM 112 O ASP z 31 381.099 352.858 348.169 1.00 61.81 ATOM 113 N GLN z 32 380.043 351.300 346.940 1.00 79.82 ATOM 114 CA GLN z 32 378.708 351.831 347.245 1.00 77.55 ATOM 115 C GLN z 32 378.328 351.650 348.718 1.00 76.68 ATOM 116 O GLN z 32 377.527 352.407 349.261 1.00 75.26 ATOM 117 N THR z 33 378.918 350.649 349.359 1.00 56.19 ATOM 118 CA THR z 33 378.715 350.399 350.787 1.00 56.69 ATOM 119 C THR z 33 379.626 351.249 351.696 1.00 58.26 ATOM 120 O THR z 33 379.606 351.092 352.925 1.00 59.83 ATOM 121 N ILE z 34 380.416 352.133 351.069 1.00 45.75 ATOM 122 CA ILE z 34 381.429 352.982 351.716 1.00 47.44 ATOM 123 C ILE z 34 382.654 352.237 352.247 1.00 49.77 ATOM 124 O ILE z 34 383.368 352.745 353.107 1.00 48.15 ATOM 125 N ASN z 35 382.899 351.027 351.766 1.00 54.70 ATOM 126 CA ASN z 35 384.192 350.413 352.007 1.00 57.31 ATOM 127 C ASN z 35 385.245 351.316 351.383 1.00 57.05 ATOM 128 O ASN z 35 385.234 351.554 350.183 1.00 57.30 ATOM 129 N LEU z 36 386.145 351.823 352.217 1.00 45.21 ATOM 130 CA LEU z 36 387.226 352.672 351.781 1.00 44.75 ATOM 131 C LEU z 36 388.478 351.843 351.634 1.00 48.40 ATOM 132 O LEU z 36 388.798 351.049 352.525 1.00 50.13 ATOM 133 N ILE z 37 389.169 352.007 350.502 1.00 46.65 ATOM 134 CA ILE z 37 390.545 351.518 350.338 1.00 49.81 ATOM 135 C ILE z 37 391.565 352.623 350.662 1.00 50.85 ATOM 136 O ILE z 37 391.529 353.686 350.083 1.00 50.30 ATOM 137 N LEU z 38 392.470 352.365 351.600 1.00 62.44 ATOM 138 CA LEU z 38 393.358 353.420 352.099 1.00 61.25 ATOM 139 C LEU z 38 394.856 353.157 351.950 1.00 65.08 ATOM 140 O LEU z 38 395.331 352.012 351.949 1.00 68.88 ATOM 141 N ASP z 39 395.589 354.254 351.842 1.00 75.66 ATOM 142 CA ASP z 39 397.036 354.202 351.761 1.00 79.26 ATOM 143 C ASP z 39 397.690 355.214 352.700 1.00 79.08 ATOM 144 O ASP z 39 397.143 356.288 352.970 1.00 75.84 ATOM 145 N GLU z 40 398.854 354.836 353.213 1.00 90.43 ATOM 146 CA GLU z 40 399.619 355.663 354.136 1.00 92.01 ATOM 147 C GLU z 40 398.819 356.226 355.281 1.00 89.65 ATOM 148 O GLU z 40 398.625 357.431 355.387 1.00 87.90 ATOM 149 N SER z 41 398.376 355.329 356.144 1.00 84.48 ATOM 150 CA SER z 41 397.423 355.660 357.193 1.00 83.03 ATOM 151 C SER z 41 398.096 355.951 358.529 1.00 87.00 ATOM 152 O SER z 41 399.164 355.418 358.848 1.00 91.64 ATOM 153 N HIS z 42 397.440 356.804 359.306 1.00 74.18 ATOM 154 CA HIS z 42 397.989 357.330 360.538 1.00 78.56 ATOM 155 C HIS z 42 396.856 357.675 361.504 1.00 77.03 ATOM 156 O HIS z 42 395.723 357.956 361.101 1.00 72.65 ATOM 157 N GLU z 43 397.183 357.641 362.786 1.00 91.99 ATOM 158 CA GLU z 43 396.269 358.006 363.850 1.00 93.55 ATOM 159 C GLU z 43 396.315 359.524 363.987 1.00 93.36 ATOM 160 O GLU z 43 397.326 360.043 364.415 1.00 96.48 ATOM 161 N ARG z 44 395.249 360.237 363.625 1.00117.42 ATOM 162 CA ARG z 44 395.269 361.705 363.681 1.00117.65 ATOM 163 C ARG z 44 395.756 362.223 365.026 1.00123.74 ATOM 164 O ARG z 44 396.591 363.118 365.080 1.00125.76 ATOM 165 N GLN z 54 400.607 358.250 364.560 1.00118.56 ATOM 166 CA GLN z 54 401.233 356.937 364.499 1.00121.03 ATOM 167 C GLN z 54 400.803 356.222 363.225 1.00116.20 ATOM 168 O GLN z 54 399.624 356.194 362.882 1.00111.84 ATOM 169 N VAL z 55 401.777 355.660 362.522 1.00104.59 ATOM 170 CA VAL z 55 401.566 355.099 361.199 1.00100.96 ATOM 171 C VAL z 55 401.052 353.678 361.330 1.00101.78 ATOM 172 O VAL z 55 401.820 352.757 361.595 1.00106.24 ATOM 173 N VAL z 56 399.753 353.497 361.117 1.00133.66 ATOM 174 CA VAL z 56 399.130 352.182 361.230 1.00134.52 ATOM 175 C VAL z 56 399.522 351.234 360.096 1.00134.27 ATOM 176 O VAL z 56 399.787 350.055 360.331 1.00137.17 ATOM 177 N LEU z 57 399.561 351.744 358.869 1.00105.50 ATOM 178 CA LEU z 57 399.916 350.903 357.728 1.00105.98 ATOM 179 C LEU z 57 400.096 351.675 356.424 1.00103.57 ATOM 180 O LEU z 57 399.707 352.838 356.311 1.00100.71 ATOM 181 N GLY z 58 400.690 351.004 355.441 1.00 90.01 ATOM 182 CA GLY z 58 400.911 351.565 354.122 1.00 88.42 ATOM 183 C GLY z 58 399.651 351.339 353.274 1.00 84.76 ATOM 184 O GLY z 58 399.262 352.193 352.492 1.00 81.55 ATOM 185 N LEU z 59 399.014 350.188 353.451 1.00 77.11 ATOM 186 CA LEU z 59 397.752 349.904 352.783 1.00 72.92 ATOM 187 C LEU z 59 396.762 349.243 353.739 1.00 71.80 ATOM 188 O LEU z 59 397.101 348.297 354.452 1.00 75.20 ATOM 189 N TYR z 60 395.532 349.738 353.756 1.00 77.42 ATOM 190 CA TYR z 60 394.537 349.125 354.621 1.00 77.27 ATOM 191 C TYR z 60 393.122 349.240 354.094 1.00 73.65 ATOM 192 O TYR z 60 392.777 350.191 353.408 1.00 70.14 ATOM 193 N ILE z 61 392.314 348.235 354.390 1.00 71.82 ATOM 194 CA ILE z 61 390.923 348.196 353.943 1.00 69.03 ATOM 195 C ILE z 61 389.996 348.477 355.116 1.00 67.35 ATOM 196 O ILE z 61 390.126 347.881 356.183 1.00 70.18 ATOM 197 N VAL z 62 389.058 349.389 354.917 1.00 60.32 ATOM 198 CA VAL z 62 388.183 349.815 356.008 1.00 58.12 ATOM 199 C VAL z 62 386.706 349.700 355.642 1.00 55.98 ATOM 200 O VAL z 62 386.287 350.113 354.564 1.00 54.37 ATOM 201 N ARG z 63 385.926 349.137 356.567 1.00 64.52 ATOM 202 CA ARG z 63 384.498 348.859 356.360 1.00 62.74 ATOM 203 C ARG z 63 383.618 350.090 356.500 1.00 57.94 ATOM 204 O ARG z 63 383.809 350.890 357.405 1.00 56.78 ATOM 205 N GLY z 64 382.652 350.212 355.592 1.00 57.39 ATOM 206 CA GLY z 64 381.723 351.323 355.558 1.00 53.88 ATOM 207 C GLY z 64 381.002 351.472 356.865 1.00 53.63 ATOM 208 O GLY z 64 380.708 352.579 357.295 1.00 51.91 ATOM 209 N ASP z 65 380.724 350.348 357.509 1.00 68.44 ATOM 210 CA ASP z 65 380.110 350.347 358.827 1.00 68.93 ATOM 211 C ASP z 65 380.842 351.279 359.792 1.00 69.53 ATOM 212 O ASP z 65 380.223 351.945 360.616 1.00 69.68 ATOM 213 N ASN z 66 382.160 351.337 359.682 1.00 62.91 ATOM 214 CA ASN z 66 382.952 352.038 360.678 1.00 63.75 ATOM 215 C ASN z 66 383.033 353.518 360.389 1.00 60.65 ATOM 216 O ASN z 66 383.460 354.297 361.232 1.00 61.46 ATOM 217 N VAL z 67 382.625 353.914 359.190 1.00 55.26 ATOM 218 CA VAL z 67 382.803 355.296 358.792 1.00 52.60 ATOM 219 C VAL z 67 381.636 356.147 359.281 1.00 51.93 ATOM 220 O VAL z 67 380.454 355.846 359.022 1.00 51.79 ATOM 221 N ALA z 68 381.983 357.181 360.040 1.00 63.18 ATOM 222 CA ALA z 68 381.028 358.210 360.395 1.00 63.38 ATOM 223 C ALA z 68 381.173 359.295 359.343 1.00 61.74 ATOM 224 O ALA z 68 380.191 359.762 358.758 1.00 61.57 ATOM 225 N VAL z 69 382.418 359.647 359.053 1.00 64.88 ATOM 226 CA VAL z 69 382.652 360.940 358.468 1.00 65.19 ATOM 227 C VAL z 69 383.930 361.059 357.625 1.00 64.44 ATOM 228 O VAL z 69 385.011 360.702 358.070 1.00 65.60 ATOM 229 N ILE z 70 383.821 361.574 356.409 1.00 71.34 ATOM 230 CA ILE z 70 385.035 361.803 355.632 1.00 71.53 ATOM 231 C ILE z 70 385.183 363.290 355.372 1.00 73.53 ATOM 232 O ILE z 70 384.192 363.974 355.115 1.00 74.00 ATOM 233 N GLY z 71 386.417 363.784 355.470 1.00 80.25 ATOM 234 CA GLY z 71 386.712 365.193 355.284 1.00 82.81 ATOM 235 C GLY z 71 387.916 365.397 354.382 1.00 83.33 ATOM 236 O GLY z 71 388.926 364.713 354.513 1.00 83.25 ATOM 237 N GLU z 72 387.804 366.334 353.449 1.00 67.49 ATOM 238 CA GLU z 72 388.889 366.605 352.516 1.00 68.70 ATOM 239 C GLU z 72 389.844 367.664 353.058 1.00 71.94 ATOM 240 O GLU z 72 389.443 368.782 353.389 1.00 74.08 ATOM 241 N ILE z 73 391.116 367.300 353.134 1.00 82.97 ATOM 242 CA ILE z 73 392.124 368.216 353.629 1.00 86.75 ATOM 243 C ILE z 73 393.272 368.336 352.648 1.00 88.60 ATOM 244 O ILE z 73 393.061 368.697 351.490 1.00 88.68 TER