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 N 1 214 PDB 3CHN 3CHN 1 214 SEQRES 1 N 107 GLU LEU VAL MET THR GLN SER PRO SER SER LEU SER ALA SEQRES 2 N 107 SER VAL GLY ASP ARG VAL ASN ILE ALA CYS ARG ALA SER SEQRES 3 N 107 GLN GLY ILE SER SER ALA LEU ALA TRP TYR GLN GLN LYS SEQRES 4 N 107 PRO GLY LYS ALA PRO ARG LEU LEU ILE TYR ASP ALA SER SEQRES 5 N 107 ASN LEU GLU SER GLY VAL PRO SER ARG PHE SER GLY SER SEQRES 6 N 107 GLY SER GLY THR ASP PHE THR LEU THR ILE SER SER LEU SEQRES 7 N 107 GLN PRO GLU ASP PHE ALA ILE TYR TYR CYS GLN GLN PHE SEQRES 8 N 107 ASN SER TYR PRO LEU THR PHE GLY GLY GLY THR LYS VAL SEQRES 9 N 107 GLU ILE LYS ATOM 1 CA GLU N 1 8.974 137.580 68.989 1.00 44.73 ATOM 2 CA LEU N 2 8.979 134.333 67.028 1.00 35.54 ATOM 3 CA VAL N 3 11.604 134.578 64.335 1.00 31.56 ATOM 4 CA MET N 4 10.782 133.400 60.784 1.00 22.17 ATOM 5 CA THR N 5 13.840 132.599 58.663 1.00 21.72 ATOM 6 CA GLN N 6 13.570 131.840 54.933 1.00 21.28 ATOM 7 CA SER N 7 15.997 129.875 52.869 1.00 26.91 ATOM 8 CA PRO N 8 17.333 130.847 50.333 1.00 23.87 ATOM 9 CA SER N 9 17.359 134.599 49.884 1.00 25.30 ATOM 10 CA SER N 10 17.544 134.307 46.055 1.00 19.86 ATOM 11 CA LEU N 11 17.123 131.605 43.425 1.00 23.29 ATOM 12 CA SER N 12 17.254 131.702 39.620 1.00 23.31 ATOM 13 CA ALA N 13 15.626 128.762 37.841 1.00 17.57 ATOM 14 CA SER N 14 14.377 128.048 34.316 1.00 22.73 ATOM 15 CA VAL N 15 10.706 127.806 33.445 1.00 28.57 ATOM 16 CA GLY N 16 9.444 124.276 34.010 1.00 21.03 ATOM 17 CA ASP N 17 11.752 123.803 36.992 1.00 22.77 ATOM 18 CA ARG N 18 10.395 122.847 40.371 1.00 23.60 ATOM 19 CA VAL N 19 11.440 125.263 43.141 1.00 23.83 ATOM 20 CA ASN N 20 11.148 124.781 46.938 1.00 23.16 ATOM 21 CA ILE N 21 11.552 127.710 49.468 1.00 17.54 ATOM 22 CA ALA N 22 11.922 126.847 53.176 1.00 16.62 ATOM 23 CA CYS N 23 10.799 128.862 56.201 1.00 18.46 ATOM 24 CA ARG N 24 11.724 128.006 59.822 1.00 25.96 ATOM 25 CA ALA N 25 9.871 129.124 62.884 1.00 23.98 ATOM 26 CA SER N 26 12.248 129.621 65.896 1.00 26.04 ATOM 27 CA GLN N 27 9.649 127.513 67.794 1.00 30.74 ATOM 28 CA GLY N 28 6.472 125.523 67.054 1.00 22.50 ATOM 29 CA ILE N 29 3.565 127.316 65.359 1.00 23.00 ATOM 30 CA SER N 30 1.438 124.262 64.441 1.00 28.25 ATOM 31 CA SER N 31 -0.059 125.191 61.027 1.00 24.99 ATOM 32 CA ALA N 32 -0.317 128.947 61.463 1.00 18.53 ATOM 33 CA LEU N 33 1.704 129.917 58.490 1.00 14.34 ATOM 34 CA ALA N 34 0.610 131.929 55.434 1.00 12.12 ATOM 35 CA TRP N 35 2.742 132.529 52.216 1.00 11.73 ATOM 36 CA TYR N 36 2.578 135.785 50.140 1.00 12.91 ATOM 37 CA GLN N 37 3.744 136.688 46.682 1.00 14.01 ATOM 38 CA GLN N 38 4.856 140.310 46.111 1.00 17.89 ATOM 39 CA LYS N 39 5.631 141.495 42.598 1.00 28.11 ATOM 40 CA PRO N 40 8.063 144.372 42.834 1.00 48.58 ATOM 41 CA GLY N 41 6.168 147.565 43.608 1.00 50.05 ATOM 42 CA LYS N 42 2.859 146.063 44.583 1.00 36.39 ATOM 43 CA ALA N 43 0.884 145.034 47.497 1.00 25.74 ATOM 44 CA PRO N 44 1.608 141.470 48.707 1.00 19.57 ATOM 45 CA ARG N 45 -0.872 138.694 47.670 1.00 18.49 ATOM 46 CA LEU N 46 -2.037 135.667 49.640 1.00 16.21 ATOM 47 CA LEU N 47 -1.219 132.278 48.094 1.00 12.87 ATOM 48 CA ILE N 48 -1.465 129.816 50.963 1.00 14.65 ATOM 49 CA TYR N 49 -2.923 129.993 54.536 1.00 17.16 ATOM 50 CA ASP N 50 -2.846 127.337 57.339 1.00 18.89 ATOM 51 CA ALA N 51 0.441 125.961 55.845 1.00 18.17 ATOM 52 CA SER N 52 -1.284 124.132 53.017 1.00 20.97 ATOM 53 CA ASN N 53 -4.652 125.676 51.941 1.00 19.22 ATOM 54 CA LEU N 54 -4.545 127.509 48.549 1.00 19.53 ATOM 55 CA GLU N 55 -6.453 130.732 48.491 1.00 17.43 ATOM 56 CA SER N 56 -9.267 130.798 45.834 1.00 20.00 ATOM 57 CA GLY N 57 -7.992 131.763 42.325 1.00 20.01 ATOM 58 CA VAL N 58 -4.259 130.863 43.015 1.00 21.23 ATOM 59 CA PRO N 59 -2.830 128.500 40.347 1.00 16.07 ATOM 60 CA SER N 60 -2.719 124.826 41.196 1.00 22.82 ATOM 61 CA ARG N 61 1.123 124.796 40.686 1.00 21.29 ATOM 62 CA PHE N 62 1.592 126.431 44.115 1.00 17.51 ATOM 63 CA SER N 63 1.526 124.055 47.128 1.00 19.32 ATOM 64 CA GLY N 64 2.730 124.337 50.755 1.00 20.78 ATOM 65 CA SER N 65 3.665 121.834 53.460 1.00 23.83 ATOM 66 CA GLY N 66 5.014 121.648 57.023 1.00 21.33 ATOM 67 CA SER N 67 3.829 121.677 60.581 1.00 24.78 ATOM 68 CA GLY N 68 5.527 122.663 63.797 1.00 20.79 ATOM 69 CA THR N 69 8.653 124.490 62.812 1.00 21.84 ATOM 70 CA ASP N 70 9.581 123.732 59.141 1.00 22.29 ATOM 71 CA PHE N 71 7.432 124.783 56.185 1.00 18.92 ATOM 72 CA THR N 72 7.981 124.487 52.357 1.00 16.74 ATOM 73 CA LEU N 73 6.349 126.343 49.471 1.00 17.41 ATOM 74 CA THR N 74 6.759 124.424 46.126 1.00 18.15 ATOM 75 CA ILE N 75 6.149 125.955 42.671 1.00 18.09 ATOM 76 CA SER N 76 5.942 122.818 40.567 1.00 26.38 ATOM 77 CA SER N 77 6.530 124.284 37.067 1.00 21.00 ATOM 78 CA LEU N 78 8.008 127.766 37.289 1.00 18.63 ATOM 79 CA GLN N 79 6.445 130.206 34.844 1.00 18.79 ATOM 80 CA PRO N 80 7.775 133.859 33.846 1.00 20.11 ATOM 81 CA GLU N 81 4.947 135.472 35.726 1.00 20.56 ATOM 82 CA ASP N 82 6.244 133.844 38.920 1.00 17.09 ATOM 83 CA PHE N 83 9.072 136.409 39.264 1.00 19.73 ATOM 84 CA ALA N 84 8.454 137.908 42.710 1.00 14.48 ATOM 85 CA ILE N 85 9.653 138.049 46.336 1.00 18.56 ATOM 86 CA TYR N 86 7.898 135.356 48.436 1.00 15.43 ATOM 87 CA TYR N 87 7.264 135.809 52.290 1.00 12.46 ATOM 88 CA CYS N 88 6.071 133.534 55.020 1.00 17.01 ATOM 89 CA GLN N 89 4.271 134.987 58.048 1.00 17.53 ATOM 90 CA GLN N 90 3.302 133.268 61.389 1.00 15.70 ATOM 91 CA PHE N 91 0.034 134.045 63.230 1.00 19.77 ATOM 92 CA ASN N 92 0.381 131.758 66.184 1.00 24.81 ATOM 93 CA SER N 93 1.728 134.508 68.451 1.00 25.13 ATOM 94 CA TYR N 94 1.723 138.294 68.701 1.00 27.26 ATOM 95 CA PRO N 95 3.767 140.208 67.304 1.00 22.87 ATOM 96 CA LEU N 96 2.820 138.606 64.041 1.00 17.90 ATOM 97 CA THR N 97 6.111 138.207 62.137 1.00 20.34 ATOM 98 CA PHE N 98 7.334 137.831 58.566 1.00 20.06 ATOM 99 CA GLY N 99 10.281 136.050 57.150 1.00 18.84 ATOM 100 CA GLY N 100 12.967 137.925 55.219 1.00 20.40 ATOM 101 CA GLY N 101 11.974 137.016 51.592 1.00 17.69 ATOM 102 CA THR N 102 13.097 134.727 48.804 1.00 17.17 ATOM 103 CA LYS N 103 13.484 136.572 45.483 1.00 19.91 ATOM 104 CA VAL N 104 12.876 134.238 42.533 1.00 19.16 ATOM 105 CA GLU N 105 14.379 135.432 39.196 1.00 24.03 ATOM 106 CA ILE N 106 13.743 133.518 35.887 1.00 24.32 ATOM 107 CA LYS N 107 16.714 132.062 33.867 1.00 25.43 TER