HEADER IMMUNE SYSTEM 10-MAR-08 3CHN TITLE Solution structure of human secretory IgA1 COMPND MOL_ID: 2; COMPND 2 MOLECULE: Ig alpha-1 chain C region; COMPND 3 CHAIN: A, B, D, C; EXPDTA SOLUTION SCATTERING DBREF 3CHN C 123 475 UNP P01876 IGHA1_HUMAN 1 353 SEQRES 1 C 108 ALA SER PRO THR SER PRO LYS VAL PHE PRO LEU SER LEU SEQRES 2 C 108 CYS SER THR GLN PRO ASP GLY ASN VAL VAL ILE ALA CYS SEQRES 3 C 108 LEU VAL GLN GLY PHE PHE PRO GLN GLU PRO LEU SER VAL SEQRES 4 C 108 THR TRP SER GLU SER GLY GLN GLY VAL THR ALA ARG ASN SEQRES 5 C 108 PHE PRO PRO SER GLN ASP ALA SER GLY ASP LEU TYR THR SEQRES 6 C 108 THR SER SER GLN LEU THR LEU PRO ALA THR GLN CYS LEU SEQRES 7 C 108 ALA GLY LYS SER VAL THR CYS HIS VAL LYS HIS TYR THR SEQRES 8 C 108 ASN PRO SER GLN ASP VAL THR VAL PRO CYS PRO VAL PRO SEQRES 9 C 108 SER THR PRO PRO ATOM 1 CA ALA C 123 73.610 157.262 -51.419 0.00 0.00 ATOM 2 CA SER C 124 76.881 158.242 -49.814 0.00 0.00 ATOM 3 CA PRO C 125 79.209 155.840 -47.868 0.00 0.00 ATOM 4 CA THR C 126 79.407 156.764 -44.118 0.00 0.00 ATOM 5 CA SER C 127 81.685 155.162 -41.439 0.00 0.00 ATOM 6 CA PRO C 128 80.129 153.993 -38.081 0.00 0.00 ATOM 7 CA LYS C 129 80.428 156.085 -34.888 0.00 0.00 ATOM 8 CA VAL C 130 80.928 153.678 -31.960 0.00 0.00 ATOM 9 CA PHE C 131 79.370 154.570 -28.555 0.00 0.00 ATOM 10 CA PRO C 132 79.635 152.767 -25.171 0.00 0.00 ATOM 11 CA LEU C 133 76.570 151.173 -23.532 0.00 0.00 ATOM 12 CA SER C 134 77.367 150.904 -19.769 0.00 0.00 ATOM 13 CA LEU C 135 75.503 151.285 -16.408 0.00 0.00 ATOM 14 CA CYS C 136 76.883 152.627 -13.072 0.00 0.00 ATOM 15 CA SER C 137 74.649 151.017 -10.310 0.00 0.00 ATOM 16 CA THR C 138 71.578 150.861 -12.686 0.00 0.00 ATOM 17 CA GLN C 139 72.018 147.096 -13.571 0.00 0.00 ATOM 18 CA PRO C 140 70.817 144.264 -11.187 0.00 0.00 ATOM 19 CA ASP C 141 73.318 143.033 -8.468 0.00 0.00 ATOM 20 CA GLY C 142 74.914 139.790 -9.874 0.00 0.00 ATOM 21 CA ASN C 143 75.307 139.945 -13.712 0.00 0.00 ATOM 22 CA VAL C 144 76.703 142.762 -15.944 0.00 0.00 ATOM 23 CA VAL C 145 75.476 143.813 -19.456 0.00 0.00 ATOM 24 CA ILE C 146 77.775 146.154 -21.425 0.00 0.00 ATOM 25 CA ALA C 147 77.608 146.939 -25.131 0.00 0.00 ATOM 26 CA CYS C 148 78.785 148.983 -28.142 0.00 0.00 ATOM 27 CA LEU C 149 76.287 150.931 -30.297 0.00 0.00 ATOM 28 CA VAL C 150 77.727 150.930 -33.913 0.00 0.00 ATOM 29 CA GLN C 151 75.778 153.920 -35.267 0.00 0.00 ATOM 30 CA GLY C 152 75.024 155.698 -38.579 0.00 0.00 ATOM 31 CA PHE C 153 76.870 153.694 -41.243 0.00 0.00 ATOM 32 CA PHE C 154 76.245 152.945 -44.959 0.00 0.00 ATOM 33 CA PRO C 155 76.346 150.583 -46.690 0.00 0.00 ATOM 34 CA GLN C 156 75.615 147.507 -44.422 0.00 0.00 ATOM 35 CA GLU C 157 78.751 145.390 -45.399 0.00 0.00 ATOM 36 CA PRO C 158 80.322 142.651 -43.115 0.00 0.00 ATOM 37 CA LEU C 159 80.743 144.024 -39.560 0.00 0.00 ATOM 38 CA SER C 160 83.280 141.996 -37.465 0.00 0.00 ATOM 39 CA VAL C 161 82.659 142.666 -33.721 0.00 0.00 ATOM 40 CA THR C 162 85.021 141.005 -31.221 0.00 0.00 ATOM 41 CA TRP C 163 85.227 141.620 -27.399 0.00 0.00 ATOM 42 CA SER C 164 88.488 141.522 -25.265 0.00 0.00 ATOM 43 CA GLU C 165 87.008 139.027 -22.690 0.00 0.00 ATOM 44 CA SER C 166 85.890 135.436 -23.652 0.00 0.00 ATOM 45 CA GLY C 167 84.803 132.470 -21.422 0.00 0.00 ATOM 46 CA GLN C 168 82.142 129.883 -20.349 0.00 0.00 ATOM 47 CA GLY C 169 79.572 132.306 -18.770 0.00 0.00 ATOM 48 CA VAL C 170 80.442 135.376 -20.980 0.00 0.00 ATOM 49 CA THR C 171 77.805 135.590 -23.799 0.00 0.00 ATOM 50 CA ALA C 172 78.218 137.848 -26.885 0.00 0.00 ATOM 51 CA ARG C 173 75.081 138.862 -28.861 0.00 0.00 ATOM 52 CA ASN C 174 75.639 140.619 -32.229 0.00 0.00 ATOM 53 CA PHE C 175 72.271 142.241 -33.239 0.00 0.00 ATOM 54 CA PRO C 176 71.690 142.322 -37.099 0.00 0.00 ATOM 55 CA PRO C 177 71.797 145.773 -38.886 0.00 0.00 ATOM 56 CA SER C 178 68.545 147.815 -38.664 0.00 0.00 ATOM 57 CA GLN C 179 67.893 150.459 -41.367 0.00 0.00 ATOM 58 CA ASP C 180 66.617 154.036 -40.524 0.00 0.00 ATOM 59 CA ALA C 181 63.960 155.337 -43.073 0.00 0.00 ATOM 60 CA SER C 182 64.560 154.936 -46.904 0.00 0.00 ATOM 61 CA GLY C 183 68.183 153.600 -46.979 0.00 0.00 ATOM 62 CA ASP C 184 69.525 156.668 -45.016 0.00 0.00 ATOM 63 CA LEU C 185 71.677 155.066 -42.213 0.00 0.00 ATOM 64 CA TYR C 186 72.178 151.553 -40.666 0.00 0.00 ATOM 65 CA THR C 187 72.665 150.939 -36.868 0.00 0.00 ATOM 66 CA THR C 188 73.772 147.659 -35.113 0.00 0.00 ATOM 67 CA SER C 189 74.385 146.956 -31.379 0.00 0.00 ATOM 68 CA SER C 190 76.888 144.355 -29.970 0.00 0.00 ATOM 69 CA GLN C 191 76.132 143.205 -26.358 0.00 0.00 ATOM 70 CA LEU C 192 78.433 141.346 -23.865 0.00 0.00 ATOM 71 CA THR C 193 76.594 139.678 -20.890 0.00 0.00 ATOM 72 CA LEU C 194 79.077 138.411 -18.167 0.00 0.00 ATOM 73 CA PRO C 195 79.034 137.725 -14.333 0.00 0.00 ATOM 74 CA ALA C 196 79.641 140.818 -12.056 0.00 0.00 ATOM 75 CA THR C 197 82.694 139.010 -10.470 0.00 0.00 ATOM 76 CA GLN C 198 84.232 138.907 -14.044 0.00 0.00 ATOM 77 CA CYS C 199 83.457 142.657 -14.712 0.00 0.00 ATOM 78 CA LEU C 200 84.276 144.600 -11.465 0.00 0.00 ATOM 79 CA ALA C 201 83.795 148.423 -10.912 0.00 0.00 ATOM 80 CA GLY C 202 86.767 150.501 -12.253 0.00 0.00 ATOM 81 CA LYS C 203 87.687 147.811 -14.880 0.00 0.00 ATOM 82 CA SER C 204 86.868 147.880 -18.666 0.00 0.00 ATOM 83 CA VAL C 205 86.284 145.455 -21.634 0.00 0.00 ATOM 84 CA THR C 206 87.402 146.470 -25.183 0.00 0.00 ATOM 85 CA CYS C 207 85.011 146.106 -28.162 0.00 0.00 ATOM 86 CA HIS C 208 86.858 145.756 -31.542 0.00 0.00 ATOM 87 CA VAL C 209 84.727 146.733 -34.600 0.00 0.00 ATOM 88 CA LYS C 210 85.865 146.055 -38.203 0.00 0.00 ATOM 89 CA HIS C 211 83.609 147.552 -40.946 0.00 0.00 ATOM 90 CA TYR C 212 84.608 145.888 -44.407 0.00 0.00 ATOM 91 CA THR C 213 88.372 146.071 -45.206 0.00 0.00 ATOM 92 CA ASN C 214 88.722 149.333 -43.178 0.00 0.00 ATOM 93 CA PRO C 215 91.059 149.611 -40.079 0.00 0.00 ATOM 94 CA SER C 216 89.690 148.285 -36.719 0.00 0.00 ATOM 95 CA GLN C 217 87.822 150.835 -34.514 0.00 0.00 ATOM 96 CA ASP C 218 88.369 150.062 -30.792 0.00 0.00 ATOM 97 CA VAL C 219 86.339 151.298 -27.759 0.00 0.00 ATOM 98 CA THR C 220 87.136 150.661 -24.080 0.00 0.00 ATOM 99 CA VAL C 221 83.693 150.213 -22.398 0.00 0.00 ATOM 100 CA PRO C 222 83.407 150.460 -18.526 0.00 0.00 ATOM 101 CA CYS C 223 81.777 150.684 -17.513 1.00 0.00 ATOM 102 CA PRO C 224 80.146 150.970 -16.499 1.00 0.00 ATOM 103 CA VAL C 225 78.037 148.790 -15.533 1.00 0.00 ATOM 104 CA PRO C 226 77.380 144.840 -15.954 1.00 0.00 ATOM 105 CA SER C 227 73.948 145.241 -13.851 1.00 0.00 ATOM 106 CA THR C 228 70.408 143.606 -14.431 1.00 0.00 ATOM 107 CA PRO C 229 68.623 143.036 -10.961 1.00 0.00 ATOM 108 CA PRO C 230 64.646 142.596 -10.483 1.00 0.00 TER