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: 2; COMPND 2 MOLECULE: U5 small nuclear ribonucleoprotein 200 kDa helicase; COMPND 3 CHAIN: D; COMPND 4 EC: 3.6.4.13; EXPDTA ELECTRON MICROSCOPY DBREF 6AH0 D 1 2136 UNP O75643 U520_HUMAN 1 2136 SEQRES 1 D 57 SER MET CYS PRO LEU ARG GLN PHE ARG LYS LEU PRO GLU SEQRES 2 D 57 GLU VAL VAL LYS LYS ILE GLU LYS LYS ASN PHE PRO PHE SEQRES 3 D 57 GLU ARG LEU TYR ASP LEU ASN HIS ASN GLU ILE GLY GLU SEQRES 4 D 57 LEU ILE ARG MET PRO LYS MET GLY LYS THR ILE HIS LYS SEQRES 5 D 57 TYR VAL HIS LEU PHE ATOM 1 N SER D1125 223.705 235.534 320.036 1.00125.28 ATOM 2 CA SER D1125 223.902 234.123 319.718 1.00130.90 ATOM 3 C SER D1125 223.462 233.230 320.870 1.00136.75 ATOM 4 O SER D1125 223.489 232.006 320.768 1.00142.20 ATOM 5 N MET D1126 223.090 233.851 321.978 1.00146.09 ATOM 6 CA MET D1126 222.576 233.111 323.109 1.00145.54 ATOM 7 C MET D1126 221.049 233.166 323.213 1.00141.71 ATOM 8 O MET D1126 220.413 234.169 322.873 1.00138.71 ATOM 9 N CYS D1127 220.486 232.055 323.684 1.00150.64 ATOM 10 CA CYS D1127 219.046 231.835 323.750 1.00147.73 ATOM 11 C CYS D1127 218.293 232.936 324.472 1.00143.74 ATOM 12 O CYS D1127 218.576 233.226 325.631 1.00143.68 ATOM 13 N PRO D1128 217.298 233.519 323.789 1.00145.01 ATOM 14 CA PRO D1128 216.465 234.625 324.272 1.00141.75 ATOM 15 C PRO D1128 215.824 234.319 325.618 1.00140.90 ATOM 16 O PRO D1128 215.508 235.242 326.372 1.00139.47 ATOM 17 N LEU D1129 215.641 233.032 325.902 1.00127.91 ATOM 18 CA LEU D1129 215.062 232.581 327.160 1.00128.59 ATOM 19 C LEU D1129 215.879 233.088 328.348 1.00130.36 ATOM 20 O LEU D1129 215.381 233.168 329.468 1.00131.30 ATOM 21 N ARG D1130 217.136 233.440 328.097 1.00149.00 ATOM 22 CA ARG D1130 217.989 233.990 329.141 1.00150.34 ATOM 23 C ARG D1130 217.532 235.345 329.669 1.00148.10 ATOM 24 O ARG D1130 217.847 235.699 330.798 1.00149.12 ATOM 25 N GLN D1131 216.799 236.114 328.875 1.00131.97 ATOM 26 CA GLN D1131 216.364 237.427 329.352 1.00132.53 ATOM 27 C GLN D1131 215.289 237.288 330.422 1.00133.04 ATOM 28 O GLN D1131 214.960 238.256 331.114 1.00134.28 ATOM 29 N PHE D1132 214.745 236.078 330.540 1.00144.48 ATOM 30 CA PHE D1132 213.900 235.723 331.667 1.00145.06 ATOM 31 C PHE D1132 214.854 235.127 332.676 1.00147.54 ATOM 32 O PHE D1132 215.270 233.978 332.533 1.00149.20 ATOM 33 N ARG D1133 215.153 235.854 333.743 1.00166.94 ATOM 34 CA ARG D1133 216.172 235.378 334.661 1.00169.69 ATOM 35 C ARG D1133 215.596 234.254 335.512 1.00171.21 ATOM 36 O ARG D1133 216.311 233.578 336.252 1.00173.96 ATOM 37 N LYS D1134 214.292 234.045 335.369 1.00169.70 ATOM 38 CA LYS D1134 213.561 233.076 336.172 1.00171.21 ATOM 39 C LYS D1134 214.024 231.648 335.846 1.00173.34 ATOM 40 O LYS D1134 213.776 230.708 336.608 1.00175.58 ATOM 41 N LEU D1135 214.728 231.508 334.727 1.00160.34 ATOM 42 CA LEU D1135 215.097 230.199 334.193 1.00162.79 ATOM 43 C LEU D1135 216.416 229.656 334.753 1.00166.50 ATOM 44 O LEU D1135 217.358 230.418 334.995 1.00166.76 ATOM 45 N PRO D1136 216.466 228.334 334.989 1.00160.13 ATOM 46 CA PRO D1136 217.673 227.573 335.339 1.00164.76 ATOM 47 C PRO D1136 218.752 227.656 334.270 1.00165.99 ATOM 48 O PRO D1136 218.434 227.585 333.086 1.00164.50 ATOM 49 N GLU D1137 220.010 227.781 334.684 1.00207.54 ATOM 50 CA GLU D1137 221.120 227.920 333.742 1.00209.23 ATOM 51 C GLU D1137 221.408 226.652 332.942 1.00213.36 ATOM 52 O GLU D1137 221.711 226.720 331.744 1.00213.06 ATOM 53 N GLU D1138 221.336 225.503 333.604 1.00203.52 ATOM 54 CA GLU D1138 221.689 224.250 332.951 1.00208.61 ATOM 55 C GLU D1138 220.687 223.910 331.855 1.00206.40 ATOM 56 O GLU D1138 221.048 223.329 330.832 1.00208.53 ATOM 57 N VAL D1139 219.428 224.295 332.067 1.00175.88 ATOM 58 CA VAL D1139 218.383 224.042 331.084 1.00173.68 ATOM 59 C VAL D1139 218.627 224.884 329.840 1.00169.84 ATOM 60 O VAL D1139 218.582 224.378 328.718 1.00170.09 ATOM 61 N VAL D1140 218.898 226.167 330.052 1.00157.94 ATOM 62 CA VAL D1140 219.240 227.071 328.962 1.00154.96 ATOM 63 C VAL D1140 220.432 226.543 328.158 1.00158.77 ATOM 64 O VAL D1140 220.349 226.387 326.932 1.00158.25 ATOM 65 N LYS D1141 221.529 226.245 328.854 1.00189.24 ATOM 66 CA LYS D1141 222.716 225.698 328.202 1.00193.74 ATOM 67 C LYS D1141 222.384 224.416 327.430 1.00196.53 ATOM 68 O LYS D1141 222.952 224.153 326.366 1.00198.61 ATOM 69 N LYS D1142 221.443 223.643 327.969 1.00195.99 ATOM 70 CA LYS D1142 221.011 222.385 327.356 1.00198.69 ATOM 71 C LYS D1142 220.274 222.621 326.040 1.00195.32 ATOM 72 O LYS D1142 220.499 221.903 325.064 1.00198.39 ATOM 73 N ILE D1143 219.386 223.610 326.013 1.00169.99 ATOM 74 CA ILE D1143 218.685 223.925 324.771 1.00167.32 ATOM 75 C ILE D1143 219.631 224.586 323.765 1.00167.85 ATOM 76 O ILE D1143 219.383 224.553 322.561 1.00168.12 ATOM 77 N GLU D1144 220.710 225.190 324.258 1.00169.21 ATOM 78 CA GLU D1144 221.714 225.771 323.369 1.00170.43 ATOM 79 C GLU D1144 222.592 224.679 322.761 1.00176.75 ATOM 80 O GLU D1144 223.109 224.829 321.651 1.00178.62 ATOM 81 N LYS D1145 222.749 223.581 323.501 1.00209.51 ATOM 82 CA LYS D1145 223.541 222.427 323.067 1.00216.30 ATOM 83 C LYS D1145 223.064 221.889 321.716 1.00217.93 ATOM 84 O LYS D1145 223.826 221.857 320.746 1.00221.54 ATOM 85 N LYS D1146 221.799 221.481 321.658 1.00203.52 ATOM 86 CA LYS D1146 221.170 221.107 320.399 1.00204.83 ATOM 87 C LYS D1146 220.753 222.393 319.710 1.00200.10 ATOM 88 O LYS D1146 220.191 223.277 320.347 1.00194.56 ATOM 89 N ASN D1147 221.009 222.512 318.413 1.00207.90 ATOM 90 CA ASN D1147 220.590 223.724 317.724 1.00204.06 ATOM 91 C ASN D1147 219.197 223.542 317.132 1.00202.81 ATOM 92 O ASN D1147 219.002 222.835 316.144 1.00207.34 ATOM 93 N PHE D1148 218.232 224.204 317.762 1.00207.52 ATOM 94 CA PHE D1148 216.824 224.127 317.387 1.00205.57 ATOM 95 C PHE D1148 216.221 225.525 317.390 1.00199.80 ATOM 96 O PHE D1148 215.791 226.000 318.443 1.00195.40 ATOM 97 N PRO D1149 216.195 226.187 316.222 1.00165.12 ATOM 98 CA PRO D1149 215.903 227.620 316.105 1.00159.88 ATOM 99 C PRO D1149 214.676 228.043 316.917 1.00154.30 ATOM 100 O PRO D1149 213.642 227.376 316.895 1.00154.11 ATOM 101 N PHE D1150 214.832 229.150 317.639 1.00178.90 ATOM 102 CA PHE D1150 213.920 229.555 318.709 1.00174.66 ATOM 103 C PHE D1150 212.461 229.708 318.285 1.00172.29 ATOM 104 O PHE D1150 211.555 229.266 318.995 1.00171.28 ATOM 105 N GLU D1151 212.237 230.319 317.128 1.00179.93 ATOM 106 CA GLU D1151 210.882 230.538 316.640 1.00178.21 ATOM 107 C GLU D1151 210.184 229.219 316.310 1.00180.76 ATOM 108 O GLU D1151 209.001 229.200 315.966 1.00180.00 ATOM 109 N ARG D1152 210.924 228.115 316.392 1.00173.28 ATOM 110 CA ARG D1152 210.345 226.795 316.171 1.00176.39 ATOM 111 C ARG D1152 209.828 226.176 317.475 1.00175.84 ATOM 112 O ARG D1152 209.394 225.027 317.495 1.00178.66 ATOM 113 N LEU D1153 209.881 226.937 318.562 1.00147.78 ATOM 114 CA LEU D1153 209.335 226.468 319.834 1.00147.35 ATOM 115 C LEU D1153 207.817 226.676 319.938 1.00145.41 ATOM 116 O LEU D1153 207.157 226.038 320.756 1.00145.97 ATOM 117 N TYR D1154 207.255 227.556 319.112 1.00166.14 ATOM 118 CA TYR D1154 205.822 227.840 319.198 1.00164.98 ATOM 119 C TYR D1154 204.976 226.691 318.661 1.00167.58 ATOM 120 O TYR D1154 203.830 226.499 319.077 1.00167.63 ATOM 121 N ASP D1155 205.541 225.919 317.741 1.00199.48 ATOM 122 CA ASP D1155 204.808 224.818 317.122 1.00202.54 ATOM 123 C ASP D1155 204.580 223.679 318.118 1.00204.50 ATOM 124 O ASP D1155 203.617 222.910 318.005 1.00206.43 ATOM 125 N LEU D1156 205.471 223.599 319.105 1.00183.40 ATOM 126 CA LEU D1156 205.510 222.477 320.039 1.00185.80 ATOM 127 C LEU D1156 204.658 222.707 321.287 1.00183.92 ATOM 128 O LEU D1156 204.621 223.813 321.832 1.00180.81 ATOM 129 N ASN D1157 203.974 221.655 321.731 1.00206.90 ATOM 130 CA ASN D1157 203.215 221.708 322.980 1.00206.01 ATOM 131 C ASN D1157 204.118 221.453 324.178 1.00206.52 ATOM 132 O ASN D1157 205.336 221.335 324.024 1.00207.44 ATOM 133 N HIS D1158 203.523 221.354 325.363 1.00197.36 ATOM 134 CA HIS D1158 204.304 221.272 326.596 1.00197.73 ATOM 135 C HIS D1158 205.188 220.024 326.635 1.00201.42 ATOM 136 O HIS D1158 206.280 220.036 327.212 1.00202.05 ATOM 137 N ASN D1159 204.712 218.953 326.011 1.00188.39 ATOM 138 CA ASN D1159 205.438 217.687 325.991 1.00192.68 ATOM 139 C ASN D1159 206.546 217.672 324.938 1.00193.93 ATOM 140 O ASN D1159 207.670 217.230 325.205 1.00196.43 ATOM 141 N GLU D1160 206.220 218.172 323.749 1.00194.06 ATOM 142 CA GLU D1160 207.141 218.173 322.618 1.00195.67 ATOM 143 C GLU D1160 208.382 219.006 322.904 1.00194.02 ATOM 144 O GLU D1160 209.448 218.763 322.341 1.00196.62 ATOM 145 N ILE D1161 208.231 219.992 323.780 1.00180.66 ATOM 146 CA ILE D1161 209.347 220.833 324.181 1.00179.07 ATOM 147 C ILE D1161 210.377 220.046 324.978 1.00182.49 ATOM 148 O ILE D1161 211.570 220.055 324.657 1.00184.30 ATOM 149 N GLY D1162 209.908 219.367 326.022 1.00215.31 ATOM 150 CA GLY D1162 210.786 218.637 326.916 1.00218.79 ATOM 151 C GLY D1162 211.495 217.486 326.231 1.00223.93 ATOM 152 O GLY D1162 212.542 217.025 326.695 1.00227.27 ATOM 153 N GLU D1163 210.926 217.031 325.117 1.00187.09 ATOM 154 CA GLU D1163 211.471 215.896 324.378 1.00192.63 ATOM 155 C GLU D1163 212.755 216.223 323.619 1.00194.39 ATOM 156 O GLU D1163 213.512 215.321 323.259 1.00199.78 ATOM 157 N LEU D1164 213.000 217.505 323.379 1.00187.60 ATOM 158 CA LEU D1164 214.199 217.925 322.665 1.00189.10 ATOM 159 C LEU D1164 215.442 217.762 323.522 1.00191.55 ATOM 160 O LEU D1164 216.434 217.172 323.095 1.00196.53 ATOM 161 N ILE D1165 215.380 218.299 324.733 1.00220.68 ATOM 162 CA ILE D1165 216.513 218.290 325.653 1.00222.93 ATOM 163 C ILE D1165 216.484 217.089 326.605 1.00227.13 ATOM 164 O ILE D1165 217.295 217.002 327.528 1.00229.50 ATOM 165 N ARG D1166 215.525 216.189 326.374 1.00233.92 ATOM 166 CA ARG D1166 215.269 215.007 327.208 1.00237.79 ATOM 167 C ARG D1166 215.119 215.324 328.702 1.00236.15 ATOM 168 O ARG D1166 215.405 214.492 329.567 1.00240.24 ATOM 169 N MET D1167 214.632 216.529 328.986 1.00197.64 ATOM 170 CA MET D1167 214.324 216.945 330.347 1.00195.88 ATOM 171 C MET D1167 212.842 217.296 330.424 1.00191.62 ATOM 172 O MET D1167 212.481 218.472 330.465 1.00187.07 ATOM 173 N PRO D1168 211.977 216.268 330.441 1.00184.63 ATOM 174 CA PRO D1168 210.524 216.444 330.329 1.00181.51 ATOM 175 C PRO D1168 209.900 217.114 331.553 1.00178.82 ATOM 176 O PRO D1168 208.842 217.730 331.433 1.00175.39 ATOM 177 N LYS D1169 210.547 216.997 332.706 1.00186.92 ATOM 178 CA LYS D1169 210.038 217.612 333.929 1.00185.00 ATOM 179 C LYS D1169 209.968 219.134 333.767 1.00180.16 ATOM 180 O LYS D1169 209.156 219.806 334.406 1.00177.68 ATOM 181 N MET D1170 210.812 219.665 332.895 1.00197.18 ATOM 182 CA MET D1170 210.854 221.096 332.627 1.00192.97 ATOM 183 C MET D1170 209.812 221.537 331.600 1.00189.75 ATOM 184 O MET D1170 209.506 222.732 331.481 1.00186.32 ATOM 185 N GLY D1171 209.253 220.560 330.890 1.00195.97 ATOM 186 CA GLY D1171 208.432 220.799 329.713 1.00193.90 ATOM 187 C GLY D1171 207.353 221.859 329.835 1.00190.21 ATOM 188 O GLY D1171 207.138 222.638 328.904 1.00187.79 ATOM 189 N LYS D1172 206.674 221.894 330.976 1.00174.68 ATOM 190 CA LYS D1172 205.635 222.890 331.207 1.00171.90 ATOM 191 C LYS D1172 206.239 224.283 331.361 1.00169.16 ATOM 192 O LYS D1172 205.855 225.221 330.651 1.00166.70 ATOM 193 N THR D1173 207.205 224.405 332.275 1.00174.63 ATOM 194 CA THR D1173 207.765 225.707 332.643 1.00172.47 ATOM 195 C THR D1173 208.391 226.427 331.456 1.00170.67 ATOM 196 O THR D1173 208.113 227.613 331.228 1.00168.04 ATOM 197 N ILE D1174 209.214 225.702 330.700 1.00157.71 ATOM 198 CA ILE D1174 209.789 226.228 329.467 1.00156.41 ATOM 199 C ILE D1174 208.688 226.846 328.626 1.00153.94 ATOM 200 O ILE D1174 208.785 228.006 328.215 1.00151.54 ATOM 201 N HIS D1175 207.621 226.074 328.425 1.00154.02 ATOM 202 CA HIS D1175 206.522 226.506 327.582 1.00152.30 ATOM 203 C HIS D1175 206.017 227.870 328.020 1.00149.86 ATOM 204 O HIS D1175 205.825 228.752 327.178 1.00148.04 ATOM 205 N LYS D1176 205.859 228.055 329.331 1.00162.01 ATOM 206 CA LYS D1176 205.364 229.322 329.864 1.00160.20 ATOM 207 C LYS D1176 206.207 230.453 329.300 1.00158.15 ATOM 208 O LYS D1176 205.688 231.366 328.642 1.00156.65 ATOM 209 N TYR D1177 207.521 230.348 329.497 1.00165.81 ATOM 210 CA TYR D1177 208.437 231.378 329.022 1.00164.18 ATOM 211 C TYR D1177 208.359 231.594 327.523 1.00163.17 ATOM 212 O TYR D1177 208.419 232.735 327.067 1.00161.39 ATOM 213 N VAL D1178 208.217 230.513 326.759 1.00127.70 ATOM 214 CA VAL D1178 208.242 230.659 325.317 1.00126.88 ATOM 215 C VAL D1178 207.055 231.509 324.903 1.00126.87 ATOM 216 O VAL D1178 207.141 232.287 323.950 1.00126.30 ATOM 217 N HIS D1179 205.963 231.406 325.654 1.00135.81 ATOM 218 CA HIS D1179 204.784 232.191 325.317 1.00135.28 ATOM 219 C HIS D1179 204.738 233.520 326.062 1.00134.44 ATOM 220 O HIS D1179 203.880 234.363 325.802 1.00134.48 ATOM 221 N LEU D1180 205.669 233.699 326.994 1.00135.66 ATOM 222 CA LEU D1180 205.841 234.981 327.666 1.00134.48 ATOM 223 C LEU D1180 206.675 235.932 326.823 1.00133.25 ATOM 224 O LEU D1180 206.582 237.153 326.960 1.00132.45 ATOM 225 N PHE D1181 207.502 235.356 325.960 1.00143.00 ATOM 226 CA PHE D1181 208.384 236.126 325.099 1.00142.15 ATOM 227 C PHE D1181 207.560 236.899 324.095 1.00142.02 ATOM 228 O PHE D1181 206.780 236.307 323.346 1.00142.59 TER