HEADER IMMUNE SYSTEM 02-AUG-07 2QTJ TITLE Solution structure of human dimeric immunoglobulin A COMPND MOL_ID: 1; COMPND 2 MOLECULE: Kappa light chain IgA1; COMPND 3 CHAIN: L, M, N, O; EXPDTA SOLUTION SCATTERING DBREF 2QTJ M 1 214 PDB 2QTJ 2QTJ 1 214 SEQRES 1 M 107 GLU LEU VAL MET THR GLN SER PRO SER SER LEU SER ALA SEQRES 2 M 107 SER VAL GLY ASP ARG VAL ASN ILE ALA CYS ARG ALA SER SEQRES 3 M 107 GLN GLY ILE SER SER ALA LEU ALA TRP TYR GLN GLN LYS SEQRES 4 M 107 PRO GLY LYS ALA PRO ARG LEU LEU ILE TYR ASP ALA SER SEQRES 5 M 107 ASN LEU GLU SER GLY VAL PRO SER ARG PHE SER GLY SER SEQRES 6 M 107 GLY SER GLY THR ASP PHE THR LEU THR ILE SER SER LEU SEQRES 7 M 107 GLN PRO GLU ASP PHE ALA ILE TYR TYR CYS GLN GLN PHE SEQRES 8 M 107 ASN SER TYR PRO LEU THR PHE GLY GLY GLY THR LYS VAL SEQRES 9 M 107 GLU ILE LYS ATOM 1 CA GLU M 1 -70.928 41.745 -39.022 1.00 44.73 ATOM 2 CA LEU M 2 -68.937 38.528 -38.750 1.00 35.54 ATOM 3 CA VAL M 3 -65.874 39.199 -36.657 1.00 31.56 ATOM 4 CA MET M 4 -62.477 37.852 -37.799 1.00 22.17 ATOM 5 CA THR M 5 -59.898 37.576 -35.012 1.00 21.72 ATOM 6 CA GLN M 6 -56.243 36.736 -35.716 1.00 21.28 ATOM 7 CA SER M 7 -53.800 35.205 -33.330 1.00 26.91 ATOM 8 CA PRO M 8 -51.105 36.367 -32.593 1.00 23.87 ATOM 9 CA SER M 9 -50.716 40.062 -33.294 1.00 25.30 ATOM 10 CA SER M 10 -46.899 39.759 -33.655 1.00 19.86 ATOM 11 CA LEU M 11 -44.324 36.995 -33.997 1.00 23.29 ATOM 12 CA SER M 12 -40.545 37.069 -34.473 1.00 23.31 ATOM 13 CA ALA M 13 -38.991 33.867 -35.816 1.00 17.57 ATOM 14 CA SER M 14 -35.691 32.904 -37.451 1.00 22.73 ATOM 15 CA VAL M 15 -35.393 32.013 -41.111 1.00 28.57 ATOM 16 CA GLY M 16 -36.089 28.322 -41.632 1.00 21.03 ATOM 17 CA ASP M 17 -38.673 28.295 -38.845 1.00 22.77 ATOM 18 CA ARG M 18 -42.205 27.159 -39.476 1.00 23.60 ATOM 19 CA VAL M 19 -44.821 29.751 -38.454 1.00 23.83 ATOM 20 CA ASN M 20 -48.608 29.271 -38.067 1.00 23.16 ATOM 21 CA ILE M 21 -51.091 32.253 -37.800 1.00 17.54 ATOM 22 CA ALA M 22 -54.682 31.512 -36.712 1.00 16.62 ATOM 23 CA CYS M 23 -57.873 33.333 -37.694 1.00 18.46 ATOM 24 CA ARG M 24 -61.297 32.699 -36.084 1.00 25.96 ATOM 25 CA ALA M 25 -64.623 33.506 -37.611 1.00 23.98 ATOM 26 CA SER M 26 -67.240 34.450 -34.919 1.00 26.04 ATOM 27 CA GLN M 27 -69.485 31.939 -36.786 1.00 30.74 ATOM 28 CA GLY M 28 -69.213 29.415 -39.639 1.00 22.50 ATOM 29 CA ILE M 29 -68.014 30.646 -43.044 1.00 23.00 ATOM 30 CA SER M 30 -67.386 27.258 -44.716 1.00 28.25 ATOM 31 CA SER M 31 -64.258 27.870 -46.861 1.00 24.99 ATOM 32 CA ALA M 32 -64.788 31.527 -47.706 1.00 18.53 ATOM 33 CA LEU M 33 -61.553 32.803 -46.368 1.00 14.34 ATOM 34 CA ALA M 34 -58.736 34.556 -48.256 1.00 12.12 ATOM 35 CA TRP M 35 -55.237 35.481 -46.784 1.00 11.73 ATOM 36 CA TYR M 36 -53.264 38.635 -47.836 1.00 12.91 ATOM 37 CA GLN M 37 -49.679 39.688 -47.395 1.00 14.01 ATOM 38 CA GLN M 38 -49.003 43.441 -47.036 1.00 17.89 ATOM 39 CA LYS M 39 -45.431 44.702 -47.033 1.00 28.11 ATOM 40 CA PRO M 40 -45.335 47.966 -45.135 1.00 48.58 ATOM 41 CA GLY M 41 -46.443 50.783 -47.418 1.00 50.05 ATOM 42 CA LYS M 42 -47.892 48.738 -50.223 1.00 36.39 ATOM 43 CA ALA M 43 -51.059 47.411 -51.514 1.00 25.74 ATOM 44 CA PRO M 44 -52.086 44.044 -49.996 1.00 19.57 ATOM 45 CA ARG M 45 -51.400 40.862 -52.081 1.00 18.49 ATOM 46 CA LEU M 46 -53.477 37.699 -52.380 1.00 16.21 ATOM 47 CA LEU M 47 -51.771 34.491 -51.231 1.00 12.87 ATOM 48 CA ILE M 48 -54.606 32.059 -50.592 1.00 14.65 ATOM 49 CA TYR M 49 -58.360 32.021 -51.491 1.00 17.16 ATOM 50 CA ASP M 50 -61.079 29.451 -50.519 1.00 18.89 ATOM 51 CA ALA M 51 -59.074 28.655 -47.310 1.00 18.17 ATOM 52 CA SER M 52 -56.515 26.519 -49.103 1.00 20.97 ATOM 53 CA ASN M 53 -55.993 27.434 -52.815 1.00 19.22 ATOM 54 CA LEU M 54 -52.654 29.218 -53.557 1.00 19.53 ATOM 55 CA GLU M 55 -52.943 32.056 -55.987 1.00 17.43 ATOM 56 CA SER M 56 -50.754 31.593 -59.143 1.00 20.00 ATOM 57 CA GLY M 57 -47.107 32.726 -58.613 1.00 20.01 ATOM 58 CA VAL M 58 -47.201 32.506 -54.722 1.00 21.23 ATOM 59 CA PRO M 59 -44.305 30.398 -53.329 1.00 16.07 ATOM 60 CA SER M 60 -45.071 26.810 -52.446 1.00 22.82 ATOM 61 CA ARG M 61 -43.975 27.451 -48.783 1.00 21.29 ATOM 62 CA PHE M 62 -47.315 29.182 -48.085 1.00 17.51 ATOM 63 CA SER M 63 -50.265 26.868 -47.268 1.00 19.32 ATOM 64 CA GLY M 64 -53.668 27.400 -45.585 1.00 20.78 ATOM 65 CA SER M 65 -56.157 25.132 -43.820 1.00 23.83 ATOM 66 CA GLY M 66 -59.466 25.224 -41.926 1.00 21.33 ATOM 67 CA SER M 67 -63.163 25.088 -42.537 1.00 24.78 ATOM 68 CA GLY M 68 -66.097 26.397 -40.560 1.00 20.79 ATOM 69 CA THR M 69 -64.671 28.733 -37.991 1.00 21.84 ATOM 70 CA ASP M 70 -60.886 28.105 -37.525 1.00 22.29 ATOM 71 CA PHE M 71 -58.315 28.727 -40.255 1.00 18.92 ATOM 72 CA THR M 72 -54.442 28.489 -40.261 1.00 16.74 ATOM 73 CA LEU M 73 -51.874 29.994 -42.619 1.00 17.41 ATOM 74 CA THR M 74 -48.475 28.142 -42.398 1.00 18.15 ATOM 75 CA ILE M 75 -45.180 29.498 -43.794 1.00 18.09 ATOM 76 CA SER M 76 -43.083 26.347 -43.769 1.00 26.38 ATOM 77 CA SER M 77 -39.558 27.853 -43.998 1.00 21.00 ATOM 78 CA LEU M 78 -39.604 31.545 -43.132 1.00 18.63 ATOM 79 CA GLN M 79 -37.470 33.645 -45.459 1.00 18.79 ATOM 80 CA PRO M 80 -36.334 37.460 -44.960 1.00 20.11 ATOM 81 CA GLU M 81 -38.653 38.574 -47.704 1.00 20.56 ATOM 82 CA ASP M 82 -41.583 37.236 -45.663 1.00 17.09 ATOM 83 CA PHE M 83 -41.527 40.263 -43.310 1.00 19.73 ATOM 84 CA ALA M 84 -45.052 41.670 -43.642 1.00 14.48 ATOM 85 CA ILE M 85 -48.452 42.062 -41.942 1.00 18.56 ATOM 86 CA TYR M 86 -50.753 39.129 -42.850 1.00 15.43 ATOM 87 CA TYR M 87 -54.664 39.508 -42.951 1.00 12.46 ATOM 88 CA CYS M 88 -57.513 37.088 -43.293 1.00 17.01 ATOM 89 CA GLN M 89 -60.800 38.239 -44.828 1.00 17.53 ATOM 90 CA GLN M 90 -64.225 36.413 -44.954 1.00 15.70 ATOM 91 CA PHE M 91 -66.560 36.628 -47.985 1.00 19.77 ATOM 92 CA ASN M 92 -69.389 34.471 -46.791 1.00 24.81 ATOM 93 CA SER M 93 -71.463 37.443 -45.613 1.00 25.13 ATOM 94 CA TYR M 94 -71.770 41.172 -46.242 1.00 27.26 ATOM 95 CA PRO M 95 -70.108 43.398 -44.806 1.00 22.87 ATOM 96 CA LEU M 96 -67.003 41.618 -45.948 1.00 17.90 ATOM 97 CA THR M 97 -64.610 41.780 -42.972 1.00 20.34 ATOM 98 CA PHE M 98 -60.884 41.582 -42.269 1.00 20.06 ATOM 99 CA GLY M 99 -59.007 40.332 -39.310 1.00 18.84 ATOM 100 CA GLY M 100 -56.714 42.626 -37.326 1.00 20.40 ATOM 101 CA GLY M 101 -53.270 41.513 -38.692 1.00 17.69 ATOM 102 CA THR M 102 -50.305 39.424 -37.627 1.00 17.17 ATOM 103 CA LYS M 103 -46.993 41.267 -38.088 1.00 19.91 ATOM 104 CA VAL M 104 -44.136 38.832 -38.726 1.00 19.16 ATOM 105 CA GLU M 105 -40.627 40.231 -37.986 1.00 24.03 ATOM 106 CA ILE M 106 -37.426 38.197 -38.781 1.00 24.32 ATOM 107 CA LYS M 107 -34.950 37.261 -35.950 1.00 25.43 TER