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 108 ALA SER PRO THR SER PRO LYS VAL PHE PRO LEU SER LEU SEQRES 2 B 108 CYS SER THR GLN PRO ASP GLY ASN VAL VAL ILE ALA CYS SEQRES 3 B 108 LEU VAL GLN GLY PHE PHE PRO GLN GLU PRO LEU SER VAL SEQRES 4 B 108 THR TRP SER GLU SER GLY GLN GLY VAL THR ALA ARG ASN SEQRES 5 B 108 PHE PRO PRO SER GLN ASP ALA SER GLY ASP LEU TYR THR SEQRES 6 B 108 THR SER SER GLN LEU THR LEU PRO ALA THR GLN CYS LEU SEQRES 7 B 108 ALA GLY LYS SER VAL THR CYS HIS VAL LYS HIS TYR THR SEQRES 8 B 108 ASN PRO SER GLN ASP VAL THR VAL PRO CYS PRO VAL PRO SEQRES 9 B 108 SER THR PRO PRO ATOM 1 CA ALA B 123 -54.858 72.886 -40.215 0.00 0.00 ATOM 2 CA SER B 124 -53.581 74.390 -43.431 0.00 0.00 ATOM 3 CA PRO B 125 -51.965 72.397 -46.328 0.00 0.00 ATOM 4 CA THR B 126 -48.231 73.300 -46.777 0.00 0.00 ATOM 5 CA SER B 127 -45.857 72.079 -49.572 0.00 0.00 ATOM 6 CA PRO B 128 -42.389 70.626 -48.611 0.00 0.00 ATOM 7 CA LYS B 129 -39.185 72.703 -48.903 0.00 0.00 ATOM 8 CA VAL B 130 -36.399 70.384 -50.118 0.00 0.00 ATOM 9 CA PHE B 131 -32.823 70.960 -48.815 0.00 0.00 ATOM 10 CA PRO B 132 -29.542 69.191 -49.748 0.00 0.00 ATOM 11 CA LEU B 133 -27.634 67.082 -47.192 0.00 0.00 ATOM 12 CA SER B 134 -23.986 66.910 -48.430 0.00 0.00 ATOM 13 CA LEU B 135 -20.437 66.932 -46.908 0.00 0.00 ATOM 14 CA CYS B 136 -17.228 68.451 -48.400 0.00 0.00 ATOM 15 CA SER B 137 -14.294 66.454 -46.785 0.00 0.00 ATOM 16 CA THR B 138 -16.333 65.805 -43.542 0.00 0.00 ATOM 17 CA GLN B 139 -17.370 62.181 -44.507 0.00 0.00 ATOM 18 CA PRO B 140 -14.958 59.159 -44.067 0.00 0.00 ATOM 19 CA ASP B 141 -12.556 58.341 -47.022 0.00 0.00 ATOM 20 CA GLY B 142 -14.218 55.432 -48.975 0.00 0.00 ATOM 21 CA ASN B 143 -18.070 55.695 -48.915 0.00 0.00 ATOM 22 CA VAL B 144 -20.353 58.732 -49.565 0.00 0.00 ATOM 23 CA VAL B 145 -23.684 59.598 -47.801 0.00 0.00 ATOM 24 CA ILE B 146 -25.815 62.317 -49.445 0.00 0.00 ATOM 25 CA ALA B 147 -29.458 63.103 -48.744 0.00 0.00 ATOM 26 CA CYS B 148 -32.516 65.351 -49.224 0.00 0.00 ATOM 27 CA LEU B 149 -34.335 66.870 -46.214 0.00 0.00 ATOM 28 CA VAL B 150 -38.081 67.153 -47.229 0.00 0.00 ATOM 29 CA GLN B 151 -39.133 69.784 -44.669 0.00 0.00 ATOM 30 CA GLY B 152 -42.292 71.443 -43.269 0.00 0.00 ATOM 31 CA PHE B 153 -45.195 69.812 -45.122 0.00 0.00 ATOM 32 CA PHE B 154 -48.844 69.009 -44.229 0.00 0.00 ATOM 33 CA PRO B 155 -50.645 66.718 -44.533 0.00 0.00 ATOM 34 CA GLN B 156 -48.403 63.536 -44.583 0.00 0.00 ATOM 35 CA GLU B 157 -49.770 61.996 -47.904 0.00 0.00 ATOM 36 CA PRO B 158 -47.747 59.538 -50.152 0.00 0.00 ATOM 37 CA LEU B 159 -44.218 60.924 -50.724 0.00 0.00 ATOM 38 CA SER B 160 -42.464 59.333 -53.779 0.00 0.00 ATOM 39 CA VAL B 161 -38.658 59.846 -53.468 0.00 0.00 ATOM 40 CA THR B 162 -36.472 58.583 -56.335 0.00 0.00 ATOM 41 CA TRP B 163 -32.677 59.182 -56.853 0.00 0.00 ATOM 42 CA SER B 164 -30.905 59.617 -60.297 0.00 0.00 ATOM 43 CA GLU B 165 -28.262 56.878 -59.549 0.00 0.00 ATOM 44 CA SER B 166 -29.206 53.161 -58.950 0.00 0.00 ATOM 45 CA GLY B 167 -26.961 50.029 -58.627 0.00 0.00 ATOM 46 CA GLN B 168 -25.688 47.014 -56.573 0.00 0.00 ATOM 47 CA GLY B 169 -23.775 48.949 -53.820 0.00 0.00 ATOM 48 CA VAL B 170 -25.973 52.146 -53.916 0.00 0.00 ATOM 49 CA THR B 171 -28.489 51.939 -50.988 0.00 0.00 ATOM 50 CA ALA B 172 -31.533 54.268 -50.675 0.00 0.00 ATOM 51 CA ARG B 173 -33.135 54.756 -47.215 0.00 0.00 ATOM 52 CA ASN B 174 -36.490 56.620 -47.097 0.00 0.00 ATOM 53 CA PHE B 175 -37.089 57.656 -43.415 0.00 0.00 ATOM 54 CA PRO B 176 -40.861 57.680 -42.410 0.00 0.00 ATOM 55 CA PRO B 177 -42.547 61.119 -41.739 0.00 0.00 ATOM 56 CA SER B 178 -41.921 62.575 -38.235 0.00 0.00 ATOM 57 CA GLN B 179 -44.461 65.100 -36.857 0.00 0.00 ATOM 58 CA ASP B 180 -43.382 68.398 -35.099 0.00 0.00 ATOM 59 CA ALA B 181 -45.596 69.256 -31.998 0.00 0.00 ATOM 60 CA SER B 182 -49.479 69.006 -32.233 0.00 0.00 ATOM 61 CA GLY B 183 -49.977 68.307 -35.999 0.00 0.00 ATOM 62 CA ASP B 184 -48.078 71.535 -37.013 0.00 0.00 ATOM 63 CA LEU B 185 -45.567 70.292 -39.698 0.00 0.00 ATOM 64 CA TYR B 186 -44.187 66.897 -40.948 0.00 0.00 ATOM 65 CA THR B 187 -40.482 66.335 -41.943 0.00 0.00 ATOM 66 CA THR B 188 -38.951 63.271 -43.771 0.00 0.00 ATOM 67 CA SER B 189 -35.325 62.641 -44.899 0.00 0.00 ATOM 68 CA SER B 190 -34.267 60.488 -47.942 0.00 0.00 ATOM 69 CA GLN B 191 -30.631 59.186 -47.790 0.00 0.00 ATOM 70 CA LEU B 192 -28.452 57.719 -50.630 0.00 0.00 ATOM 71 CA THR B 193 -25.349 55.730 -49.434 0.00 0.00 ATOM 72 CA LEU B 194 -22.943 54.872 -52.377 0.00 0.00 ATOM 73 CA PRO B 195 -19.148 54.147 -52.870 0.00 0.00 ATOM 74 CA ALA B 196 -16.857 57.273 -53.195 0.00 0.00 ATOM 75 CA THR B 197 -15.660 55.993 -56.663 0.00 0.00 ATOM 76 CA GLN B 198 -19.377 56.193 -57.796 0.00 0.00 ATOM 77 CA CYS B 199 -19.849 59.763 -56.334 0.00 0.00 ATOM 78 CA LEU B 200 -16.651 61.781 -57.167 0.00 0.00 ATOM 79 CA ALA B 201 -15.937 65.461 -56.115 0.00 0.00 ATOM 80 CA GLY B 202 -17.524 68.029 -58.531 0.00 0.00 ATOM 81 CA LYS B 203 -20.313 65.563 -59.595 0.00 0.00 ATOM 82 CA SER B 204 -23.986 65.533 -58.367 0.00 0.00 ATOM 83 CA VAL B 205 -26.947 63.078 -57.876 0.00 0.00 ATOM 84 CA THR B 206 -30.562 64.306 -58.412 0.00 0.00 ATOM 85 CA CYS B 207 -33.280 63.575 -55.805 0.00 0.00 ATOM 86 CA HIS B 208 -36.846 63.581 -57.303 0.00 0.00 ATOM 87 CA VAL B 209 -39.631 64.215 -54.715 0.00 0.00 ATOM 88 CA LYS B 210 -43.353 63.780 -55.550 0.00 0.00 ATOM 89 CA HIS B 211 -45.795 64.902 -52.787 0.00 0.00 ATOM 90 CA TYR B 212 -49.389 63.470 -53.667 0.00 0.00 ATOM 91 CA THR B 213 -50.579 64.300 -57.236 0.00 0.00 ATOM 92 CA ASN B 214 -48.504 67.551 -57.254 0.00 0.00 ATOM 93 CA PRO B 215 -45.664 68.188 -59.837 0.00 0.00 ATOM 94 CA SER B 216 -42.217 66.612 -59.085 0.00 0.00 ATOM 95 CA GLN B 217 -39.753 68.782 -57.069 0.00 0.00 ATOM 96 CA ASP B 218 -36.134 68.072 -58.142 0.00 0.00 ATOM 97 CA VAL B 219 -32.868 68.912 -56.278 0.00 0.00 ATOM 98 CA THR B 220 -29.315 68.379 -57.569 0.00 0.00 ATOM 99 CA VAL B 221 -27.291 67.334 -54.456 0.00 0.00 ATOM 100 CA PRO B 222 -23.404 67.486 -54.558 0.00 0.00 ATOM 101 CA CYS B 223 -22.217 67.450 -53.029 0.00 0.00 ATOM 102 CA PRO B 224 -21.029 67.413 -51.500 1.00 0.00 ATOM 103 CA VAL B 225 -19.909 64.895 -49.904 1.00 0.00 ATOM 104 CA PRO B 226 -20.374 60.895 -49.877 1.00 0.00 ATOM 105 CA SER B 227 -17.908 60.683 -46.679 1.00 0.00 ATOM 106 CA THR B 228 -18.157 58.477 -43.421 1.00 0.00 ATOM 107 CA PRO B 229 -14.535 57.574 -42.148 1.00 0.00 ATOM 108 CA PRO B 230 -13.651 56.458 -38.378 1.00 0.00 TER