HEADER IMMUNE SYSTEM 02-AUG-07 2QTJ TITLE Solution structure of human dimeric immunoglobulin A COMPND MOL_ID: 2; COMPND 2 MOLECULE: Ig alpha-1 chain C region; COMPND 3 CHAIN: A, B, C, D; EXPDTA SOLUTION SCATTERING DBREF 2QTJ B 1 475 UNP P01876 IGHA1_HUMAN 1 475 SEQRES 1 B 122 GLN VAL LYS LEU LEU GLU GLN SER GLY ALA GLU VAL LYS SEQRES 2 B 122 LYS PRO GLY ALA SER VAL LYS VAL SER CYS LYS ALA SER SEQRES 3 B 122 GLY TYR SER PHE THR SER TYR GLY LEU HIS TRP VAL ARG SEQRES 4 B 122 GLN ALA PRO GLY GLN ARG LEU GLU TRP MET GLY TRP ILE SEQRES 5 B 122 SER ALA GLY THR GLY ASN THR LYS TYR SER GLN LYS PHE SEQRES 6 B 122 ARG GLY ARG VAL THR PHE THR ARG ASP THR SER ALA THR SEQRES 7 B 122 THR ALA TYR MET GLY LEU SER SER LEU ARG PRO GLU ASP SEQRES 8 B 122 THR ALA VAL TYR TYR CYS ALA ARG ASP PRO TYR GLY GLY SEQRES 9 B 122 GLY LYS SER GLU PHE ASP TYR TRP GLY GLN GLY THR LEU SEQRES 10 B 122 VAL THR VAL SER SER ATOM 1 CA GLN B 1 -49.994 47.544 -68.484 0.00 0.00 ATOM 2 CA VAL B 2 -49.258 51.112 -67.274 0.00 0.00 ATOM 3 CA LYS B 3 -50.186 49.243 -64.109 0.00 0.00 ATOM 4 CA LEU B 4 -53.350 46.994 -64.311 0.00 0.00 ATOM 5 CA LEU B 5 -55.627 48.860 -61.865 0.00 0.00 ATOM 6 CA GLU B 6 -54.314 52.471 -61.334 0.00 0.00 ATOM 7 CA GLN B 7 -55.678 55.165 -59.027 0.00 0.00 ATOM 8 CA SER B 8 -55.835 59.004 -58.895 0.00 0.00 ATOM 9 CA GLY B 9 -53.275 60.458 -56.407 0.00 0.00 ATOM 10 CA ALA B 10 -53.823 62.134 -53.060 0.00 0.00 ATOM 11 CA GLU B 11 -55.669 64.530 -51.626 0.00 0.00 ATOM 12 CA VAL B 12 -56.377 66.903 -48.841 0.00 0.00 ATOM 13 CA LYS B 13 -60.008 67.860 -48.333 0.00 0.00 ATOM 14 CA LYS B 14 -61.525 70.156 -45.684 0.00 0.00 ATOM 15 CA PRO B 15 -63.956 68.501 -43.132 0.00 0.00 ATOM 16 CA GLY B 16 -67.501 68.670 -44.652 0.00 0.00 ATOM 17 CA ALA B 17 -66.252 68.450 -48.279 0.00 0.00 ATOM 18 CA SER B 18 -66.516 65.511 -50.710 0.00 0.00 ATOM 19 CA VAL B 19 -63.697 63.523 -52.390 0.00 0.00 ATOM 20 CA LYS B 20 -63.852 61.599 -55.698 0.00 0.00 ATOM 21 CA VAL B 21 -61.301 58.792 -56.167 0.00 0.00 ATOM 22 CA SER B 22 -60.869 57.107 -59.600 0.00 0.00 ATOM 23 CA CYS B 23 -59.576 53.680 -60.602 0.00 0.00 ATOM 24 CA LYS B 24 -58.614 53.095 -64.290 0.00 0.00 ATOM 25 CA ALA B 25 -58.506 49.413 -65.427 0.00 0.00 ATOM 26 CA SER B 26 -55.946 48.560 -68.207 0.00 0.00 ATOM 27 CA GLY B 27 -55.026 45.192 -69.886 0.00 0.00 ATOM 28 CA TYR B 28 -58.168 43.120 -69.038 0.00 0.00 ATOM 29 CA SER B 29 -61.832 43.340 -70.262 0.00 0.00 ATOM 30 CA PHE B 30 -63.291 46.005 -67.871 0.00 0.00 ATOM 31 CA THR B 31 -67.027 44.983 -68.126 0.00 0.00 ATOM 32 CA SER B 32 -66.361 41.248 -67.312 0.00 0.00 ATOM 33 CA TYR B 33 -65.462 41.881 -63.592 0.00 0.00 ATOM 34 CA GLY B 34 -66.673 43.813 -60.553 0.00 0.00 ATOM 35 CA LEU B 35 -64.500 46.272 -58.570 0.00 0.00 ATOM 36 CA HIS B 36 -64.441 46.403 -54.759 0.00 0.00 ATOM 37 CA TRP B 37 -63.530 49.566 -52.713 0.00 0.00 ATOM 38 CA VAL B 38 -61.595 49.121 -49.431 0.00 0.00 ATOM 39 CA ARG B 39 -59.965 51.625 -47.054 0.00 0.00 ATOM 40 CA GLN B 40 -57.217 51.480 -44.411 0.00 0.00 ATOM 41 CA ALA B 41 -57.142 54.218 -41.729 0.00 0.00 ATOM 42 CA PRO B 42 -53.690 54.727 -40.053 0.00 0.00 ATOM 43 CA GLY B 43 -52.776 51.789 -37.740 0.00 0.00 ATOM 44 CA GLN B 44 -56.098 50.074 -38.474 0.00 0.00 ATOM 45 CA ARG B 45 -57.414 47.030 -40.305 0.00 0.00 ATOM 46 CA LEU B 46 -58.768 47.142 -43.862 0.00 0.00 ATOM 47 CA GLU B 47 -62.470 48.056 -44.051 0.00 0.00 ATOM 48 CA TRP B 48 -64.679 47.016 -46.986 0.00 0.00 ATOM 49 CA MET B 49 -66.815 49.982 -48.284 0.00 0.00 ATOM 50 CA GLY B 50 -68.626 48.710 -51.408 0.00 0.00 ATOM 51 CA TRP B 51 -68.584 47.037 -54.847 0.00 0.00 ATOM 52 CA ILE B 52 -69.665 47.971 -58.414 0.00 0.00 ATOM 53 CA SER B 53 -70.368 45.607 -61.365 0.00 0.00 ATOM 54 CA ALA B 54 -68.585 47.244 -64.404 0.00 0.00 ATOM 55 CA GLY B 55 -71.069 45.537 -66.820 0.00 0.00 ATOM 56 CA THR B 56 -74.466 46.547 -65.244 0.00 0.00 ATOM 57 CA GLY B 57 -73.422 49.555 -63.051 0.00 0.00 ATOM 58 CA ASN B 58 -75.107 47.796 -60.038 0.00 0.00 ATOM 59 CA THR B 59 -74.000 48.681 -56.594 0.00 0.00 ATOM 60 CA LYS B 60 -73.535 47.111 -53.159 0.00 0.00 ATOM 61 CA TYR B 61 -72.200 48.897 -50.091 0.00 0.00 ATOM 62 CA SER B 62 -71.436 48.748 -46.376 0.00 0.00 ATOM 63 CA GLN B 63 -74.261 50.305 -44.300 0.00 0.00 ATOM 64 CA LYS B 64 -71.498 52.028 -42.217 0.00 0.00 ATOM 65 CA PHE B 65 -71.357 54.472 -45.248 0.00 0.00 ATOM 66 CA ARG B 66 -75.202 54.602 -45.734 0.00 0.00 ATOM 67 CA GLY B 67 -76.240 57.898 -47.351 0.00 0.00 ATOM 68 CA ARG B 68 -72.683 59.257 -48.047 0.00 0.00 ATOM 69 CA VAL B 69 -70.909 56.847 -50.499 0.00 0.00 ATOM 70 CA THR B 70 -71.568 56.680 -54.321 0.00 0.00 ATOM 71 CA PHE B 71 -70.056 54.241 -56.925 0.00 0.00 ATOM 72 CA THR B 72 -69.970 55.066 -60.661 0.00 0.00 ATOM 73 CA ARG B 73 -68.231 53.528 -63.724 0.00 0.00 ATOM 74 CA ASP B 74 -67.401 55.195 -67.068 0.00 0.00 ATOM 75 CA THR B 75 -67.496 52.070 -69.245 0.00 0.00 ATOM 76 CA SER B 76 -65.954 53.863 -72.340 0.00 0.00 ATOM 77 CA ALA B 77 -62.956 55.368 -70.382 0.00 0.00 ATOM 78 CA THR B 78 -62.738 52.055 -68.442 0.00 0.00 ATOM 79 CA THR B 79 -62.625 53.892 -65.080 0.00 0.00 ATOM 80 CA ALA B 80 -64.627 53.336 -61.871 0.00 0.00 ATOM 81 CA TYR B 81 -65.073 56.070 -59.212 0.00 0.00 ATOM 82 CA MET B 82 -66.070 56.258 -55.586 0.00 0.00 ATOM 83 CA GLY B 83 -67.547 59.498 -54.216 0.00 0.00 ATOM 84 CA LEU B 84 -67.363 60.027 -50.406 0.00 0.00 ATOM 85 CA SER B 85 -69.421 62.975 -49.030 0.00 0.00 ATOM 86 CA SER B 86 -69.529 64.814 -45.653 0.00 0.00 ATOM 87 CA LEU B 87 -65.850 64.166 -44.897 0.00 0.00 ATOM 88 CA ARG B 88 -64.871 63.830 -41.226 0.00 0.00 ATOM 89 CA PRO B 89 -61.229 63.762 -39.881 0.00 0.00 ATOM 90 CA GLU B 90 -61.583 59.927 -39.350 0.00 0.00 ATOM 91 CA ASP B 91 -61.962 59.465 -43.166 0.00 0.00 ATOM 92 CA THR B 92 -58.149 60.125 -43.377 0.00 0.00 ATOM 93 CA ALA B 93 -57.140 56.758 -44.867 0.00 0.00 ATOM 94 CA VAL B 94 -55.691 55.030 -47.949 0.00 0.00 ATOM 95 CA TYR B 95 -58.534 54.157 -50.405 0.00 0.00 ATOM 96 CA TYR B 96 -57.926 51.089 -52.579 0.00 0.00 ATOM 97 CA CYS B 97 -59.941 49.719 -55.441 0.00 0.00 ATOM 98 CA ALA B 98 -59.462 45.935 -55.882 0.00 0.00 ATOM 99 CA ARG B 99 -60.765 43.470 -58.476 0.00 0.00 ATOM 100 CA ASP B 100 -63.547 40.873 -57.986 0.00 0.00 ATOM 101 CA PRO B 101 -62.239 37.906 -60.153 0.00 0.00 ATOM 102 CA TYR B 102 -65.813 36.593 -60.806 0.00 0.00 ATOM 103 CA GLY B 103 -68.161 39.660 -61.150 0.00 0.00 ATOM 104 CA GLY B 104 -70.605 38.481 -58.389 0.00 0.00 ATOM 105 CA GLY B 105 -69.803 40.866 -55.456 0.00 0.00 ATOM 106 CA LYS B 106 -68.639 38.372 -52.799 0.00 0.00 ATOM 107 CA SER B 107 -65.065 37.290 -53.457 0.00 0.00 ATOM 108 CA GLU B 108 -61.397 37.445 -52.486 0.00 0.00 ATOM 109 CA PHE B 109 -59.653 40.354 -54.365 0.00 0.00 ATOM 110 CA ASP B 110 -56.924 39.235 -56.862 0.00 0.00 ATOM 111 CA TYR B 111 -55.599 42.652 -58.188 0.00 0.00 ATOM 112 CA TRP B 112 -55.349 45.790 -56.071 0.00 0.00 ATOM 113 CA GLY B 113 -54.878 49.401 -57.128 0.00 0.00 ATOM 114 CA GLN B 114 -51.977 51.269 -55.427 0.00 0.00 ATOM 115 CA GLY B 115 -54.052 53.380 -52.988 0.00 0.00 ATOM 116 CA THR B 116 -54.858 57.109 -52.752 0.00 0.00 ATOM 117 CA LEU B 117 -54.381 58.767 -49.400 0.00 0.00 ATOM 118 CA VAL B 118 -57.189 61.249 -48.662 0.00 0.00 ATOM 119 CA THR B 119 -56.326 63.470 -45.711 0.00 0.00 ATOM 120 CA VAL B 120 -59.229 65.399 -44.126 0.00 0.00 ATOM 121 CA SER B 121 -57.892 68.693 -42.598 0.00 0.00 ATOM 122 CA SER B 122 -58.291 72.483 -41.999 0.00 0.00 TER