HEADER SPLICING 20-DEC-16 5MQF TITLE Cryo-EM structure of a human spliceosome activated for step 2 of TITLE 2 splicing (C* complex) COMPND MOL_ID: 18; COMPND 2 MOLECULE: Intron-binding protein aquarius; COMPND 3 CHAIN: U; EXPDTA ELECTRON MICROSCOPY DBREF 5MQF U 1 1485 UNP O60306 AQR_HUMAN 1 1485 MODRES 5MQF MSE U 65 MET modified residue MODRES 5MQF MSE U 79 MET modified residue MODRES 5MQF MSE U 92 MET modified residue MODRES 5MQF MSE U 97 MET modified residue MODRES 5MQF MSE U 174 MET modified residue MODRES 5MQF MSE U 176 MET modified residue MODRES 5MQF MSE U 207 MET modified residue MODRES 5MQF MSE U 244 MET modified residue MODRES 5MQF MSE U 257 MET modified residue MODRES 5MQF MSE U 304 MET modified residue MODRES 5MQF MSE U 326 MET modified residue MODRES 5MQF MSE U 424 MET modified residue MODRES 5MQF MSE U 492 MET modified residue MODRES 5MQF MSE U 510 MET modified residue MODRES 5MQF MSE U 600 MET modified residue MODRES 5MQF MSE U 638 MET modified residue MODRES 5MQF MSE U 657 MET modified residue MODRES 5MQF MSE U 677 MET modified residue MODRES 5MQF MSE U 705 MET modified residue MODRES 5MQF MSE U 814 MET modified residue MODRES 5MQF MSE U 820 MET modified residue MODRES 5MQF MSE U 867 MET modified residue MODRES 5MQF MSE U 941 MET modified residue MODRES 5MQF MSE U 991 MET modified residue MODRES 5MQF MSE U 1037 MET modified residue MODRES 5MQF MSE U 1061 MET modified residue MODRES 5MQF MSE U 1093 MET modified residue MODRES 5MQF MSE U 1107 MET modified residue MODRES 5MQF MSE U 1115 MET modified residue MODRES 5MQF MSE U 1212 MET modified residue MODRES 5MQF MSE U 1214 MET modified residue MODRES 5MQF MSE U 1294 MET modified residue SEQRES 1 U 47 ASN GLN ILE ALA THR LEU ASP PHE ASN ASP THR PHE LEU SEQRES 2 U 47 SER ILE GLU HIS LEU LYS ALA SER PHE PRO GLY HIS ASN SEQRES 3 U 47 VAL LYS VAL THR VAL GLU ASP PRO ALA LEU GLN ILE PRO SEQRES 4 U 47 PRO PHE ARG ILE THR PHE PRO VAL SEQRES 1 U 22 GLU ALA LYS THR LEU ILE VAL GLU PRO HIS VAL ILE PRO SEQRES 2 U 22 ASN ARG GLY PRO TYR PRO TYR ASN GLN ATOM 1 CA ASN U 707 421.930 233.856 279.933 1.00 50.00 ATOM 2 CA GLN U 708 423.823 231.478 282.218 1.00 50.00 ATOM 3 CA ILE U 709 424.792 233.303 285.404 1.00 50.00 ATOM 4 CA ALA U 710 428.501 233.441 286.214 1.00 50.00 ATOM 5 CA THR U 711 428.337 234.159 289.942 1.00 50.00 ATOM 6 CA LEU U 712 425.829 232.619 292.362 1.00 50.00 ATOM 7 CA ASP U 713 425.337 232.996 296.103 1.00 50.00 ATOM 8 CA PHE U 714 425.022 229.464 297.445 1.00 50.00 ATOM 9 CA ASN U 715 424.215 230.877 300.869 1.00 50.00 ATOM 10 CA ASP U 716 423.779 228.032 303.368 1.00 50.00 ATOM 11 CA THR U 717 424.055 225.195 300.837 1.00 50.00 ATOM 12 CA PHE U 718 427.525 224.151 301.986 1.00 50.00 ATOM 13 CA LEU U 719 428.131 223.486 305.687 1.00 50.00 ATOM 14 CA SER U 720 431.830 224.308 305.360 1.00 50.00 ATOM 15 CA ILE U 721 434.603 224.991 302.851 1.00 50.00 ATOM 16 CA GLU U 722 435.452 221.283 303.123 1.00 50.00 ATOM 17 CA HIS U 723 431.898 220.342 302.124 1.00 50.00 ATOM 18 CA LEU U 724 432.150 222.737 299.180 1.00 50.00 ATOM 19 CA LYS U 725 435.463 221.349 297.908 1.00 50.00 ATOM 20 CA ALA U 726 434.085 217.822 298.176 1.00 50.00 ATOM 21 CA SER U 727 431.009 218.937 296.223 1.00 50.00 ATOM 22 CA PHE U 728 432.941 219.585 293.006 1.00 50.00 ATOM 23 CA PRO U 729 435.187 216.508 292.389 1.00 50.00 ATOM 24 CA GLY U 730 436.368 217.563 288.926 1.00 50.00 ATOM 25 CA HIS U 731 437.122 221.203 289.726 1.00 50.00 ATOM 26 CA ASN U 732 439.942 223.275 291.205 1.00 50.00 ATOM 27 CA VAL U 733 438.621 225.478 294.011 1.00 50.00 ATOM 28 CA LYS U 734 440.237 228.886 294.565 1.00 50.00 ATOM 29 CA VAL U 735 439.178 230.985 297.555 1.00 50.00 ATOM 30 CA THR U 736 439.342 234.796 297.473 1.00 50.00 ATOM 31 CA VAL U 737 440.619 234.773 301.064 1.00 50.00 ATOM 32 CA GLU U 738 443.535 232.734 302.443 1.00 50.00 ATOM 33 CA ASP U 739 442.715 232.775 306.177 1.00 50.00 ATOM 34 CA PRO U 740 441.099 229.375 306.943 1.00 50.00 ATOM 35 CA ALA U 741 439.006 231.020 309.675 1.00 50.00 ATOM 36 CA LEU U 742 437.319 233.263 307.104 1.00 50.00 ATOM 37 CA GLN U 743 436.603 230.307 304.825 1.00 50.00 ATOM 38 CA ILE U 744 433.207 229.655 306.405 1.00 50.00 ATOM 39 CA PRO U 745 429.704 229.865 304.880 1.00 50.00 ATOM 40 CA PRO U 746 427.911 231.581 303.249 1.00 50.00 ATOM 41 CA PHE U 747 429.806 231.141 299.972 1.00 50.00 ATOM 42 CA ARG U 748 429.532 232.762 296.557 1.00 50.00 ATOM 43 CA ILE U 749 430.801 230.700 293.631 1.00 50.00 ATOM 44 CA THR U 750 431.828 232.032 290.228 1.00 50.00 ATOM 45 CA PHE U 751 431.759 229.661 287.256 1.00 50.00 ATOM 46 CA PRO U 752 433.980 230.100 284.166 1.00 50.00 ATOM 47 CA VAL U 753 433.035 230.510 280.499 1.00 50.00 TER ATOM 1 CA GLU U 773 442.035 226.386 283.935 1.00 50.00 ATOM 2 CA ALA U 774 438.376 226.259 282.896 1.00 50.00 ATOM 3 CA LYS U 775 437.945 223.693 285.652 1.00 50.00 ATOM 4 CA THR U 776 438.471 226.454 288.208 1.00 50.00 ATOM 5 CA LEU U 777 435.858 227.681 290.673 1.00 50.00 ATOM 6 CA ILE U 778 436.339 230.982 292.487 1.00 50.00 ATOM 7 CA VAL U 779 434.837 230.806 295.971 1.00 50.00 ATOM 8 CA GLU U 780 434.125 233.987 297.919 1.00 50.00 ATOM 9 CA PRO U 781 433.077 233.688 301.554 1.00 50.00 ATOM 10 CA HIS U 782 430.876 236.566 302.694 1.00 50.00 ATOM 11 CA VAL U 783 429.080 237.756 305.809 1.00 50.00 ATOM 12 CA ILE U 784 425.322 237.773 306.313 1.00 50.00 ATOM 13 CA PRO U 785 424.230 241.374 306.977 1.00 50.00 ATOM 14 CA ASN U 786 423.430 241.902 310.671 1.00 50.00 ATOM 15 CA ARG U 787 419.647 241.856 311.174 1.00 50.00 ATOM 16 CA GLY U 788 419.504 243.589 314.543 1.00 50.00 ATOM 17 CA PRO U 789 420.542 243.250 318.216 1.00 50.00 ATOM 18 CA TYR U 790 418.406 240.178 318.907 1.00 50.00 ATOM 19 CA PRO U 791 420.703 237.195 318.189 1.00 50.00 ATOM 20 CA TYR U 792 417.619 234.984 317.779 1.00 50.00 ATOM 21 CA ASN U 793 416.852 236.913 314.588 1.00 50.00 ATOM 22 CA GLN U 794 419.879 235.320 312.979 1.00 50.00 TER