HEADER IMMUNE SYSTEM 10-MAR-08 3CHN TITLE Solution structure of human secretory IgA1 COMPND MOL_ID: 1; COMPND 2 MOLECULE: Immunoglobulin kappa light chain; COMPND 3 CHAIN: L, M, N, O; EXPDTA SOLUTION SCATTERING DBREF 3CHN O 1 214 PDB 3CHN 3CHN 1 214 SEQRES 1 O 107 GLU LEU VAL MET THR GLN SER PRO SER SER LEU SER ALA SEQRES 2 O 107 SER VAL GLY ASP ARG VAL ASN ILE ALA CYS ARG ALA SER SEQRES 3 O 107 GLN GLY ILE SER SER ALA LEU ALA TRP TYR GLN GLN LYS SEQRES 4 O 107 PRO GLY LYS ALA PRO ARG LEU LEU ILE TYR ASP ALA SER SEQRES 5 O 107 ASN LEU GLU SER GLY VAL PRO SER ARG PHE SER GLY SER SEQRES 6 O 107 GLY SER GLY THR ASP PHE THR LEU THR ILE SER SER LEU SEQRES 7 O 107 GLN PRO GLU ASP PHE ALA ILE TYR TYR CYS GLN GLN PHE SEQRES 8 O 107 ASN SER TYR PRO LEU THR PHE GLY GLY GLY THR LYS VAL SEQRES 9 O 107 GLU ILE LYS ATOM 1 CA GLU O 1 68.853 126.303 -67.177 1.00 44.73 ATOM 2 CA LEU O 2 67.828 123.238 -65.193 1.00 35.54 ATOM 3 CA VAL O 3 65.567 124.340 -62.386 1.00 31.56 ATOM 4 CA MET O 4 66.095 122.921 -58.869 1.00 22.17 ATOM 5 CA THR O 5 63.044 123.192 -56.609 1.00 21.72 ATOM 6 CA GLN O 6 63.203 122.354 -52.890 1.00 21.28 ATOM 7 CA SER O 7 60.346 121.318 -50.706 1.00 26.91 ATOM 8 CA PRO O 8 59.535 122.666 -48.120 1.00 23.87 ATOM 9 CA SER O 9 60.810 126.201 -47.699 1.00 25.30 ATOM 10 CA SER O 10 60.707 125.955 -43.861 1.00 19.86 ATOM 11 CA LEU O 11 60.298 123.249 -41.233 1.00 23.29 ATOM 12 CA SER O 12 60.377 123.353 -37.427 1.00 23.31 ATOM 13 CA ALA O 13 60.983 120.019 -35.700 1.00 17.57 ATOM 14 CA SER O 14 62.071 118.893 -32.230 1.00 22.73 ATOM 15 CA VAL O 15 65.474 117.410 -31.523 1.00 28.57 ATOM 16 CA GLY O 16 65.430 113.664 -32.116 1.00 21.03 ATOM 17 CA ASP O 17 62.970 114.030 -34.990 1.00 22.77 ATOM 18 CA ARG O 18 63.770 112.700 -38.419 1.00 23.60 ATOM 19 CA VAL O 19 63.487 115.348 -41.159 1.00 23.83 ATOM 20 CA ASN O 20 63.428 114.829 -44.960 1.00 23.16 ATOM 21 CA ILE O 21 63.937 117.739 -47.491 1.00 17.54 ATOM 22 CA ALA O 22 63.126 117.085 -51.171 1.00 16.62 ATOM 23 CA CYS O 23 64.736 118.622 -54.255 1.00 18.46 ATOM 24 CA ARG O 24 63.414 118.165 -57.827 1.00 25.96 ATOM 25 CA ALA O 25 65.400 118.607 -60.975 1.00 23.98 ATOM 26 CA SER O 26 63.201 119.912 -63.882 1.00 26.04 ATOM 27 CA GLN O 27 64.841 117.059 -65.880 1.00 30.74 ATOM 28 CA GLY O 28 67.178 114.100 -65.270 1.00 22.50 ATOM 29 CA ILE O 29 70.595 114.778 -63.719 1.00 23.00 ATOM 30 CA SER O 30 71.593 111.177 -62.874 1.00 28.25 ATOM 31 CA SER O 31 73.465 111.512 -59.537 1.00 24.99 ATOM 32 CA ALA O 32 74.971 114.959 -60.011 1.00 18.53 ATOM 33 CA LEU O 33 73.534 116.535 -56.957 1.00 14.34 ATOM 34 CA ALA O 34 75.383 118.028 -53.969 1.00 12.12 ATOM 35 CA TRP O 35 73.727 119.290 -50.664 1.00 11.73 ATOM 36 CA TYR O 36 75.084 122.279 -48.621 1.00 12.91 ATOM 37 CA GLN O 37 74.451 123.498 -45.119 1.00 14.01 ATOM 38 CA GLN O 38 74.666 127.275 -44.527 1.00 17.89 ATOM 39 CA LYS O 39 74.498 128.623 -40.991 1.00 28.11 ATOM 40 CA PRO O 40 73.184 132.161 -41.140 1.00 48.58 ATOM 41 CA GLY O 41 76.016 134.521 -42.021 1.00 50.05 ATOM 42 CA LYS O 42 78.570 131.993 -43.132 1.00 36.39 ATOM 43 CA ALA O 43 79.946 130.375 -46.123 1.00 25.74 ATOM 44 CA PRO O 44 77.995 127.281 -47.274 1.00 19.57 ATOM 45 CA ARG O 45 79.424 123.817 -46.329 1.00 18.49 ATOM 46 CA LEU O 46 79.399 120.589 -48.326 1.00 16.21 ATOM 47 CA LEU O 47 77.547 117.670 -46.720 1.00 12.87 ATOM 48 CA ILE O 48 76.809 115.297 -49.581 1.00 14.65 ATOM 49 CA TYR O 49 78.082 114.999 -53.213 1.00 17.16 ATOM 50 CA ASP O 50 76.981 112.549 -55.994 1.00 18.89 ATOM 51 CA ALA O 51 73.489 112.363 -54.344 1.00 18.17 ATOM 52 CA SER O 52 74.611 110.033 -51.581 1.00 20.97 ATOM 53 CA ASN O 53 78.348 110.326 -50.665 1.00 19.22 ATOM 54 CA LEU O 54 79.024 112.058 -47.285 1.00 19.53 ATOM 55 CA GLU O 55 81.917 114.438 -47.337 1.00 17.43 ATOM 56 CA SER O 56 84.698 113.517 -44.810 1.00 20.00 ATOM 57 CA GLY O 57 83.986 114.830 -41.257 1.00 20.01 ATOM 58 CA VAL O 58 80.145 115.263 -41.773 1.00 21.23 ATOM 59 CA PRO O 59 78.115 113.506 -39.025 1.00 16.07 ATOM 60 CA SER O 60 76.722 110.095 -39.843 1.00 22.82 ATOM 61 CA ARG O 61 73.125 111.374 -39.162 1.00 21.29 ATOM 62 CA PHE O 62 73.091 113.098 -42.577 1.00 17.51 ATOM 63 CA SER O 63 72.209 110.868 -45.572 1.00 19.32 ATOM 64 CA GLY O 64 71.012 111.574 -49.146 1.00 20.78 ATOM 65 CA SER O 65 69.161 109.563 -51.787 1.00 23.83 ATOM 66 CA GLY O 66 67.673 109.874 -55.285 1.00 21.33 ATOM 67 CA SER O 67 68.640 109.529 -58.892 1.00 24.78 ATOM 68 CA GLY O 68 67.237 111.064 -62.039 1.00 20.79 ATOM 69 CA THR O 69 64.967 113.838 -60.928 1.00 21.84 ATOM 70 CA ASP O 70 64.001 113.409 -57.210 1.00 22.29 ATOM 71 CA PHE O 71 66.508 113.640 -54.363 1.00 18.92 ATOM 72 CA THR O 72 66.062 113.519 -50.511 1.00 16.74 ATOM 73 CA LEU O 73 68.357 114.682 -47.716 1.00 17.41 ATOM 74 CA THR O 74 67.465 112.994 -44.342 1.00 18.15 ATOM 75 CA ILE O 75 68.713 114.193 -40.928 1.00 18.09 ATOM 76 CA SER O 76 67.930 111.154 -38.813 1.00 26.38 ATOM 77 CA SER O 77 68.036 112.703 -35.300 1.00 21.00 ATOM 78 CA LEU O 78 67.821 116.485 -35.483 1.00 18.63 ATOM 79 CA GLN O 79 70.231 118.227 -33.129 1.00 18.79 ATOM 80 CA PRO O 80 70.271 122.104 -32.097 1.00 20.11 ATOM 81 CA GLU O 81 73.395 122.672 -34.113 1.00 20.56 ATOM 82 CA ASP O 82 71.478 121.609 -37.234 1.00 17.09 ATOM 83 CA PHE O 83 69.682 124.988 -37.470 1.00 19.73 ATOM 84 CA ALA O 84 70.621 126.216 -40.952 1.00 14.48 ATOM 85 CA ILE O 85 69.382 126.788 -44.523 1.00 18.56 ATOM 86 CA TYR O 86 70.017 123.677 -46.677 1.00 15.43 ATOM 87 CA TYR O 87 70.595 123.918 -50.558 1.00 12.46 ATOM 88 CA CYS O 88 70.822 121.393 -53.325 1.00 17.01 ATOM 89 CA GLN O 89 72.870 122.172 -56.436 1.00 17.53 ATOM 90 CA GLN O 90 73.046 120.251 -59.807 1.00 15.70 ATOM 91 CA PHE O 91 76.300 119.885 -61.798 1.00 19.77 ATOM 92 CA ASN O 92 75.063 117.877 -64.717 1.00 24.81 ATOM 93 CA SER O 93 74.635 120.942 -66.940 1.00 25.13 ATOM 94 CA TYR O 94 75.917 124.502 -67.218 1.00 27.26 ATOM 95 CA PRO O 95 74.713 126.986 -65.747 1.00 22.87 ATOM 96 CA LEU O 96 75.200 125.131 -62.517 1.00 17.90 ATOM 97 CA THR O 97 72.058 125.861 -60.466 1.00 20.34 ATOM 98 CA PHE O 98 70.940 125.893 -56.837 1.00 20.06 ATOM 99 CA GLY O 99 67.629 125.214 -55.283 1.00 18.84 ATOM 100 CA GLY O 100 65.832 127.875 -53.246 1.00 20.40 ATOM 101 CA GLY O 101 66.615 126.649 -49.661 1.00 17.69 ATOM 102 CA THR O 102 64.903 124.858 -46.808 1.00 17.17 ATOM 103 CA LYS O 103 65.315 126.694 -43.486 1.00 19.91 ATOM 104 CA VAL O 104 65.224 124.272 -40.550 1.00 19.16 ATOM 105 CA GLU O 105 64.366 125.877 -37.158 1.00 24.03 ATOM 106 CA ILE O 106 64.459 123.834 -33.868 1.00 24.32 ATOM 107 CA LYS O 107 61.263 123.459 -31.706 1.00 25.43 TER