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: 9; COMPND 2 MOLECULE: Small nuclear ribonucleoprotein-associated proteins B and COMPND 3 CHAIN: f, i, U; 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 ILE U 51 REMARK 465 LYS U 52 REMARK 465 PRO U 53 REMARK 465 LYS U 54 REMARK 465 ASN U 55 REMARK 465 SER U 56 REMARK 465 LYS U 57 REMARK 465 GLN U 58 REMARK 465 ALA U 59 REMARK 465 GLU U 60 REMARK 465 ARG U 61 REMARK 465 GLU U 62 REMARK 465 GLU U 63 DBREF 6AH0 U 1 231 UNP P14678 RSMB_HUMAN 1 231 SEQRES 1 U 77 SER LYS MET LEU GLN HIS ILE ASP TYR ARG MET ARG CYS SEQRES 2 U 77 ILE LEU GLN ASP GLY ARG ILE PHE ILE GLY THR PHE LYS SEQRES 3 U 77 ALA PHE ASP LYS HIS MET ASN LEU ILE LEU CYS ASP CYS SEQRES 4 U 77 ASP GLU PHE ARG LYS ILE LYS PRO LYS ASN SER LYS GLN SEQRES 5 U 77 ALA GLU ARG GLU GLU LYS ARG VAL LEU GLY LEU VAL LEU SEQRES 6 U 77 LEU ARG GLY GLU ASN LEU VAL SER MET THR VAL GLU ATOM 1 N SER U 7 331.975 224.282 292.433 1.00 50.00 ATOM 2 CA SER U 7 330.634 224.833 292.272 1.00 50.00 ATOM 3 C SER U 7 330.372 225.943 293.285 1.00 50.00 ATOM 4 O SER U 7 330.608 227.119 293.006 1.00 50.00 ATOM 5 N LYS U 8 329.880 225.561 294.466 1.00 50.00 ATOM 6 CA LYS U 8 329.584 226.542 295.501 1.00 50.00 ATOM 7 C LYS U 8 330.834 226.972 296.257 1.00 50.00 ATOM 8 O LYS U 8 330.821 228.014 296.924 1.00 50.00 ATOM 9 N MET U 9 331.917 226.195 296.170 1.00 50.00 ATOM 10 CA MET U 9 333.145 226.547 296.873 1.00 50.00 ATOM 11 C MET U 9 333.890 227.693 296.205 1.00 50.00 ATOM 12 O MET U 9 334.643 228.403 296.879 1.00 50.00 ATOM 13 N LEU U 10 333.700 227.890 294.900 1.00 50.00 ATOM 14 CA LEU U 10 334.368 228.967 294.182 1.00 50.00 ATOM 15 C LEU U 10 333.729 230.327 294.415 1.00 50.00 ATOM 16 O LEU U 10 334.408 231.351 294.266 1.00 50.00 ATOM 17 N GLN U 11 332.445 230.368 294.777 1.00 50.00 ATOM 18 CA GLN U 11 331.781 231.644 295.019 1.00 50.00 ATOM 19 C GLN U 11 332.151 232.220 296.382 1.00 50.00 ATOM 20 O GLN U 11 332.085 233.437 296.582 1.00 50.00 ATOM 21 N HIS U 12 332.545 231.361 297.326 1.00 50.00 ATOM 22 CA HIS U 12 332.899 231.823 298.662 1.00 50.00 ATOM 23 C HIS U 12 334.373 232.182 298.791 1.00 50.00 ATOM 24 O HIS U 12 334.811 232.557 299.884 1.00 50.00 ATOM 25 N ILE U 13 335.143 232.081 297.706 1.00 50.00 ATOM 26 CA ILE U 13 336.560 232.413 297.771 1.00 50.00 ATOM 27 C ILE U 13 336.727 233.923 297.839 1.00 50.00 ATOM 28 O ILE U 13 335.921 234.681 297.289 1.00 50.00 ATOM 29 N ASP U 14 337.787 234.360 298.524 1.00 50.00 ATOM 30 CA ASP U 14 338.102 235.780 298.691 1.00 50.00 ATOM 31 C ASP U 14 336.935 236.532 299.332 1.00 50.00 ATOM 32 O ASP U 14 336.565 237.632 298.916 1.00 50.00 ATOM 33 N TYR U 15 336.354 235.922 300.364 1.00 50.00 ATOM 34 CA TYR U 15 335.234 236.504 301.089 1.00 50.00 ATOM 35 C TYR U 15 335.386 236.218 302.575 1.00 50.00 ATOM 36 O TYR U 15 336.018 235.236 302.975 1.00 50.00 ATOM 37 N ARG U 16 334.795 237.088 303.393 1.00 50.00 ATOM 38 CA ARG U 16 334.864 236.949 304.844 1.00 50.00 ATOM 39 C ARG U 16 333.633 236.195 305.328 1.00 50.00 ATOM 40 O ARG U 16 332.512 236.709 305.255 1.00 50.00 ATOM 41 N MET U 17 333.837 234.979 305.825 1.00 50.00 ATOM 42 CA MET U 17 332.761 234.150 306.338 1.00 50.00 ATOM 43 C MET U 17 332.807 234.113 307.863 1.00 50.00 ATOM 44 O MET U 17 333.658 234.731 308.507 1.00 50.00 ATOM 45 N ARG U 18 331.872 233.366 308.447 1.00 50.00 ATOM 46 CA ARG U 18 331.803 233.169 309.893 1.00 50.00 ATOM 47 C ARG U 18 331.751 231.672 310.161 1.00 50.00 ATOM 48 O ARG U 18 330.779 231.005 309.788 1.00 50.00 ATOM 49 N CYS U 19 332.788 231.146 310.804 1.00 50.00 ATOM 50 CA CYS U 19 332.897 229.722 311.085 1.00 50.00 ATOM 51 C CYS U 19 332.463 229.433 312.517 1.00 50.00 ATOM 52 O CYS U 19 332.959 230.051 313.463 1.00 50.00 ATOM 53 N ILE U 20 331.535 228.493 312.665 1.00 50.00 ATOM 54 CA ILE U 20 331.025 228.074 313.965 1.00 50.00 ATOM 55 C ILE U 20 331.593 226.697 314.277 1.00 50.00 ATOM 56 O ILE U 20 331.634 225.826 313.402 1.00 50.00 ATOM 57 N LEU U 21 332.031 226.508 315.518 1.00 50.00 ATOM 58 CA LEU U 21 332.595 225.241 315.949 1.00 50.00 ATOM 59 C LEU U 21 331.573 224.465 316.778 1.00 50.00 ATOM 60 O LEU U 21 330.454 224.920 317.023 1.00 50.00 ATOM 61 N GLN U 22 331.968 223.273 317.221 1.00 50.00 ATOM 62 CA GLN U 22 331.099 222.424 318.024 1.00 50.00 ATOM 63 C GLN U 22 330.996 222.874 319.475 1.00 50.00 ATOM 64 O GLN U 22 330.056 222.473 320.167 1.00 50.00 ATOM 65 N ASP U 23 331.934 223.693 319.950 1.00 50.00 ATOM 66 CA ASP U 23 331.927 224.181 321.321 1.00 50.00 ATOM 67 C ASP U 23 331.218 225.523 321.467 1.00 50.00 ATOM 68 O ASP U 23 331.172 226.068 322.574 1.00 50.00 ATOM 69 N GLY U 24 330.670 226.064 320.381 1.00 50.00 ATOM 70 CA GLY U 24 329.981 227.336 320.444 1.00 50.00 ATOM 71 C GLY U 24 330.821 228.543 320.102 1.00 50.00 ATOM 72 O GLY U 24 330.319 229.669 320.179 1.00 50.00 ATOM 73 N ARG U 25 332.081 228.350 319.726 1.00 50.00 ATOM 74 CA ARG U 25 332.948 229.466 319.379 1.00 50.00 ATOM 75 C ARG U 25 332.758 229.853 317.918 1.00 50.00 ATOM 76 O ARG U 25 332.726 228.997 317.029 1.00 50.00 ATOM 77 N ILE U 26 332.631 231.154 317.675 1.00 50.00 ATOM 78 CA ILE U 26 332.450 231.700 316.335 1.00 50.00 ATOM 79 C ILE U 26 333.767 232.304 315.873 1.00 50.00 ATOM 80 O ILE U 26 334.411 233.059 316.610 1.00 50.00 ATOM 81 N PHE U 27 334.165 231.971 314.647 1.00 50.00 ATOM 82 CA PHE U 27 335.401 232.469 314.049 1.00 50.00 ATOM 83 C PHE U 27 335.039 233.313 312.835 1.00 50.00 ATOM 84 O PHE U 27 334.528 232.789 311.837 1.00 50.00 ATOM 85 N ILE U 28 335.304 234.613 312.916 1.00 50.00 ATOM 86 CA ILE U 28 335.021 235.549 311.835 1.00 50.00 ATOM 87 C ILE U 28 336.334 235.886 311.142 1.00 50.00 ATOM 88 O ILE U 28 337.202 236.546 311.727 1.00 50.00 ATOM 89 N GLY U 29 336.480 235.437 309.901 1.00 50.00 ATOM 90 CA GLY U 29 337.694 235.699 309.150 1.00 50.00 ATOM 91 C GLY U 29 337.450 235.538 307.668 1.00 50.00 ATOM 92 O GLY U 29 336.399 235.059 307.235 1.00 50.00 ATOM 93 N THR U 30 338.451 235.947 306.891 1.00 50.00 ATOM 94 CA THR U 30 338.384 235.873 305.434 1.00 50.00 ATOM 95 C THR U 30 338.758 234.461 305.004 1.00 50.00 ATOM 96 O THR U 30 339.850 233.973 305.304 1.00 50.00 ATOM 97 N PHE U 31 337.846 233.798 304.298 1.00 50.00 ATOM 98 CA PHE U 31 338.107 232.450 303.809 1.00 50.00 ATOM 99 C PHE U 31 339.087 232.497 302.644 1.00 50.00 ATOM 100 O PHE U 31 338.896 233.259 301.690 1.00 50.00 ATOM 101 N LYS U 32 340.137 231.680 302.721 1.00 50.00 ATOM 102 CA LYS U 32 341.161 231.668 301.686 1.00 50.00 ATOM 103 C LYS U 32 341.241 230.308 301.003 1.00 50.00 ATOM 104 O LYS U 32 340.835 230.165 299.845 1.00 50.00 ATOM 105 N ALA U 33 341.762 229.307 301.710 1.00 50.00 ATOM 106 CA ALA U 33 341.942 227.980 301.137 1.00 50.00 ATOM 107 C ALA U 33 341.078 226.981 301.889 1.00 50.00 ATOM 108 O ALA U 33 340.808 227.165 303.078 1.00 50.00 ATOM 109 N PHE U 34 340.646 225.935 301.189 1.00 50.00 ATOM 110 CA PHE U 34 339.835 224.870 301.762 1.00 50.00 ATOM 111 C PHE U 34 340.188 223.556 301.075 1.00 50.00 ATOM 112 O PHE U 34 341.033 223.504 300.176 1.00 50.00 ATOM 113 N ASP U 35 339.524 222.481 301.499 1.00 50.00 ATOM 114 CA ASP U 35 339.756 221.154 300.950 1.00 50.00 ATOM 115 C ASP U 35 338.539 220.281 301.231 1.00 50.00 ATOM 116 O ASP U 35 337.510 220.752 301.725 1.00 50.00 ATOM 117 N LYS U 36 338.663 218.992 300.906 1.00 50.00 ATOM 118 CA LYS U 36 337.575 218.054 301.162 1.00 50.00 ATOM 119 C LYS U 36 337.469 217.725 302.645 1.00 50.00 ATOM 120 O LYS U 36 336.437 217.225 303.108 1.00 50.00 ATOM 121 N HIS U 37 338.529 217.995 303.404 1.00 50.00 ATOM 122 CA HIS U 37 338.533 217.787 304.847 1.00 50.00 ATOM 123 C HIS U 37 337.693 218.815 305.596 1.00 50.00 ATOM 124 O HIS U 37 337.559 218.702 306.820 1.00 50.00 ATOM 125 N MET U 38 337.150 219.814 304.898 1.00 50.00 ATOM 126 CA MET U 38 336.358 220.900 305.467 1.00 50.00 ATOM 127 C MET U 38 337.163 221.765 306.426 1.00 50.00 ATOM 128 O MET U 38 336.590 222.395 307.323 1.00 50.00 ATOM 129 N ASN U 39 338.483 221.814 306.261 1.00 50.00 ATOM 130 CA ASN U 39 339.311 222.672 307.097 1.00 50.00 ATOM 131 C ASN U 39 339.549 224.004 306.398 1.00 50.00 ATOM 132 O ASN U 39 340.226 224.065 305.366 1.00 50.00 ATOM 133 N LEU U 40 338.993 225.070 306.961 1.00 50.00 ATOM 134 CA LEU U 40 339.088 226.403 306.386 1.00 50.00 ATOM 135 C LEU U 40 340.236 227.175 307.023 1.00 50.00 ATOM 136 O LEU U 40 340.438 227.134 308.241 1.00 50.00 ATOM 137 N ILE U 41 340.990 227.876 306.184 1.00 50.00 ATOM 138 CA ILE U 41 342.091 228.725 306.622 1.00 50.00 ATOM 139 C ILE U 41 341.582 230.160 306.575 1.00 50.00 ATOM 140 O ILE U 41 341.342 230.713 305.495 1.00 50.00 ATOM 141 N LEU U 42 341.416 230.769 307.745 1.00 50.00 ATOM 142 CA LEU U 42 340.881 232.118 307.854 1.00 50.00 ATOM 143 C LEU U 42 342.015 233.125 308.007 1.00 50.00 ATOM 144 O LEU U 42 343.004 232.864 308.696 1.00 50.00 ATOM 145 N CYS U 43 341.859 234.273 307.357 1.00 50.00 ATOM 146 CA CYS U 43 342.831 235.356 307.420 1.00 50.00 ATOM 147 C CYS U 43 342.307 236.461 308.328 1.00 50.00 ATOM 148 O CYS U 43 341.163 236.904 308.184 1.00 50.00 ATOM 149 N ASP U 44 343.154 236.898 309.262 1.00 50.00 ATOM 150 CA ASP U 44 342.794 237.925 310.239 1.00 50.00 ATOM 151 C ASP U 44 341.551 237.519 311.029 1.00 50.00 ATOM 152 O ASP U 44 340.629 238.310 311.234 1.00 50.00 ATOM 153 N CYS U 45 341.529 236.267 311.475 1.00 50.00 ATOM 154 CA CYS U 45 340.392 235.757 312.226 1.00 50.00 ATOM 155 C CYS U 45 340.361 236.352 313.629 1.00 50.00 ATOM 156 O CYS U 45 341.399 236.647 314.228 1.00 50.00 ATOM 157 N ASP U 46 339.150 236.527 314.152 1.00 50.00 ATOM 158 CA ASP U 46 338.949 237.094 315.477 1.00 50.00 ATOM 159 C ASP U 46 337.961 236.233 316.245 1.00 50.00 ATOM 160 O ASP U 46 336.838 236.008 315.783 1.00 50.00 ATOM 161 N GLU U 47 338.381 235.754 317.411 1.00 50.00 ATOM 162 CA GLU U 47 337.532 234.934 318.262 1.00 50.00 ATOM 163 C GLU U 47 336.520 235.802 319.004 1.00 50.00 ATOM 164 O GLU U 47 336.741 236.990 319.249 1.00 50.00 ATOM 165 N PHE U 48 335.396 235.186 319.362 1.00 50.00 ATOM 166 CA PHE U 48 334.323 235.866 320.069 1.00 50.00 ATOM 167 C PHE U 48 334.218 235.323 321.485 1.00 50.00 ATOM 168 O PHE U 48 334.501 234.149 321.743 1.00 50.00 ATOM 169 N ARG U 49 333.807 236.193 322.407 1.00 50.00 ATOM 170 CA ARG U 49 333.658 235.829 323.806 1.00 50.00 ATOM 171 C ARG U 49 332.503 236.618 324.410 1.00 50.00 ATOM 172 O ARG U 49 332.272 237.779 324.068 1.00 50.00 ATOM 173 N LYS U 50 331.781 235.966 325.315 1.00 50.00 ATOM 174 CA LYS U 50 330.644 236.590 325.982 1.00 50.00 ATOM 175 C LYS U 50 331.062 237.200 327.316 1.00 50.00 ATOM 176 O LYS U 50 331.026 236.533 328.351 1.00 50.00 ATOM 177 N LYS U 64 338.033 239.550 324.020 1.00 50.00 ATOM 178 CA LYS U 64 338.293 238.846 322.770 1.00 50.00 ATOM 179 C LYS U 64 339.764 238.945 322.380 1.00 50.00 ATOM 180 O LYS U 64 340.414 239.961 322.626 1.00 50.00 ATOM 181 N ARG U 65 340.282 237.883 321.770 1.00 50.00 ATOM 182 CA ARG U 65 341.668 237.828 321.326 1.00 50.00 ATOM 183 C ARG U 65 341.714 237.786 319.805 1.00 50.00 ATOM 184 O ARG U 65 340.806 237.243 319.167 1.00 50.00 ATOM 185 N VAL U 66 342.768 238.359 319.231 1.00 50.00 ATOM 186 CA VAL U 66 342.941 238.400 317.784 1.00 50.00 ATOM 187 C VAL U 66 343.794 237.206 317.376 1.00 50.00 ATOM 188 O VAL U 66 344.979 237.133 317.714 1.00 50.00 ATOM 189 N LEU U 67 343.189 236.267 316.650 1.00 50.00 ATOM 190 CA LEU U 67 343.888 235.066 316.210 1.00 50.00 ATOM 191 C LEU U 67 344.758 235.347 314.993 1.00 50.00 ATOM 192 O LEU U 67 345.809 234.723 314.815 1.00 50.00 ATOM 193 N GLY U 68 344.330 236.284 314.148 1.00 50.00 ATOM 194 CA GLY U 68 345.051 236.585 312.927 1.00 50.00 ATOM 195 C GLY U 68 345.004 235.440 311.936 1.00 50.00 ATOM 196 O GLY U 68 343.928 234.912 311.641 1.00 50.00 ATOM 197 N LEU U 69 346.162 235.045 311.415 1.00 50.00 ATOM 198 CA LEU U 69 346.270 233.915 310.501 1.00 50.00 ATOM 199 C LEU U 69 346.204 232.623 311.302 1.00 50.00 ATOM 200 O LEU U 69 347.019 232.404 312.205 1.00 50.00 ATOM 201 N VAL U 70 345.238 231.769 310.969 1.00 50.00 ATOM 202 CA VAL U 70 345.026 230.514 311.680 1.00 50.00 ATOM 203 C VAL U 70 344.301 229.537 310.764 1.00 50.00 ATOM 204 O VAL U 70 343.710 229.924 309.752 1.00 50.00 ATOM 205 N LEU U 71 344.355 228.259 311.131 1.00 50.00 ATOM 206 CA LEU U 71 343.686 227.191 310.399 1.00 50.00 ATOM 207 C LEU U 71 342.792 226.427 311.362 1.00 50.00 ATOM 208 O LEU U 71 343.235 226.039 312.449 1.00 50.00 ATOM 209 N LEU U 72 341.541 226.212 310.966 1.00 50.00 ATOM 210 CA LEU U 72 340.579 225.509 311.800 1.00 50.00 ATOM 211 C LEU U 72 340.348 224.098 311.276 1.00 50.00 ATOM 212 O LEU U 72 340.368 223.851 310.066 1.00 50.00 ATOM 213 N ARG U 73 340.129 223.170 312.202 1.00 50.00 ATOM 214 CA ARG U 73 339.903 221.780 311.845 1.00 50.00 ATOM 215 C ARG U 73 338.508 221.594 311.258 1.00 50.00 ATOM 216 O ARG U 73 337.582 222.367 311.518 1.00 50.00 ATOM 217 N GLY U 74 338.365 220.545 310.452 1.00 50.00 ATOM 218 CA GLY U 74 337.100 220.251 309.807 1.00 50.00 ATOM 219 C GLY U 74 336.226 219.303 310.602 1.00 50.00 ATOM 220 O GLY U 74 335.023 219.196 310.346 1.00 50.00 ATOM 221 N GLU U 75 336.823 218.605 311.571 1.00 50.00 ATOM 222 CA GLU U 75 336.055 217.672 312.389 1.00 50.00 ATOM 223 C GLU U 75 335.237 218.407 313.442 1.00 50.00 ATOM 224 O GLU U 75 334.143 217.963 313.814 1.00 50.00 ATOM 225 N ASN U 76 335.747 219.532 313.937 1.00 50.00 ATOM 226 CA ASN U 76 335.064 220.319 314.955 1.00 50.00 ATOM 227 C ASN U 76 334.191 221.420 314.369 1.00 50.00 ATOM 228 O ASN U 76 333.559 222.160 315.131 1.00 50.00 ATOM 229 N LEU U 77 334.138 221.549 313.047 1.00 50.00 ATOM 230 CA LEU U 77 333.322 222.575 312.416 1.00 50.00 ATOM 231 C LEU U 77 331.840 222.253 312.566 1.00 50.00 ATOM 232 O LEU U 77 331.429 221.089 312.546 1.00 50.00 ATOM 233 N VAL U 78 331.037 223.303 312.715 1.00 50.00 ATOM 234 CA VAL U 78 329.597 223.151 312.888 1.00 50.00 ATOM 235 C VAL U 78 328.871 223.804 311.720 1.00 50.00 ATOM 236 O VAL U 78 328.280 223.116 310.880 1.00 50.00 ATOM 237 N SER U 79 328.913 225.134 311.659 1.00 50.00 ATOM 238 CA SER U 79 328.227 225.872 310.609 1.00 50.00 ATOM 239 C SER U 79 329.165 226.937 310.057 1.00 50.00 ATOM 240 O SER U 79 330.053 227.437 310.754 1.00 50.00 ATOM 241 N MET U 80 328.954 227.279 308.786 1.00 50.00 ATOM 242 CA MET U 80 329.750 228.313 308.124 1.00 50.00 ATOM 243 C MET U 80 328.777 229.269 307.443 1.00 50.00 ATOM 244 O MET U 80 328.043 228.868 306.535 1.00 50.00 ATOM 245 N THR U 81 328.777 230.523 307.882 1.00 50.00 ATOM 246 CA THR U 81 327.885 231.540 307.352 1.00 50.00 ATOM 247 C THR U 81 328.676 232.753 306.876 1.00 50.00 ATOM 248 O THR U 81 329.832 232.963 307.254 1.00 50.00 ATOM 249 N VAL U 82 328.033 233.556 306.033 1.00 50.00 ATOM 250 CA VAL U 82 328.642 234.773 305.505 1.00 50.00 ATOM 251 C VAL U 82 328.209 235.940 306.386 1.00 50.00 ATOM 252 O VAL U 82 327.016 236.224 306.513 1.00 50.00 ATOM 253 N GLU U 83 329.176 236.615 306.999 1.00 50.00 ATOM 254 CA GLU U 83 328.885 237.745 307.873 1.00 50.00 ATOM 255 C GLU U 83 329.328 239.059 307.239 1.00 50.00 ATOM 256 O GLU U 83 328.972 240.138 307.712 1.00 50.00 TER