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 M 1 214 PDB 3CHN 3CHN 1 214 SEQRES 1 M 107 GLU LEU VAL MET THR GLN SER PRO SER SER LEU SER ALA SEQRES 2 M 107 SER VAL GLY ASP ARG VAL ASN ILE ALA CYS ARG ALA SER SEQRES 3 M 107 GLN GLY ILE SER SER ALA LEU ALA TRP TYR GLN GLN LYS SEQRES 4 M 107 PRO GLY LYS ALA PRO ARG LEU LEU ILE TYR ASP ALA SER SEQRES 5 M 107 ASN LEU GLU SER GLY VAL PRO SER ARG PHE SER GLY SER SEQRES 6 M 107 GLY SER GLY THR ASP PHE THR LEU THR ILE SER SER LEU SEQRES 7 M 107 GLN PRO GLU ASP PHE ALA ILE TYR TYR CYS GLN GLN PHE SEQRES 8 M 107 ASN SER TYR PRO LEU THR PHE GLY GLY GLY THR LYS VAL SEQRES 9 M 107 GLU ILE LYS ATOM 1 CA GLU M 1 60.289 17.596 113.282 1.00 44.73 ATOM 2 CA LEU M 2 59.318 18.814 109.824 1.00 35.54 ATOM 3 CA VAL M 3 58.274 15.834 107.764 1.00 31.56 ATOM 4 CA MET M 4 59.542 15.489 104.168 1.00 22.17 ATOM 5 CA THR M 5 57.431 13.189 101.989 1.00 21.72 ATOM 6 CA GLN M 6 58.531 12.152 98.486 1.00 21.28 ATOM 7 CA SER M 7 56.317 11.019 95.690 1.00 26.91 ATOM 8 CA PRO M 8 56.607 8.421 94.165 1.00 23.87 ATOM 9 CA SER M 9 58.627 5.755 95.927 1.00 25.30 ATOM 10 CA SER M 10 59.636 4.094 92.608 1.00 19.86 ATOM 11 CA LEU M 11 59.506 4.914 88.907 1.00 23.29 ATOM 12 CA SER M 12 60.745 3.040 85.831 1.00 23.31 ATOM 13 CA ALA M 13 61.165 5.135 82.684 1.00 17.57 ATOM 14 CA SER M 14 62.999 4.757 79.369 1.00 22.73 ATOM 15 CA VAL M 15 66.089 6.747 78.491 1.00 28.57 ATOM 16 CA GLY M 16 65.123 10.070 76.940 1.00 21.03 ATOM 17 CA ASP M 17 62.036 10.334 79.142 1.00 22.77 ATOM 18 CA ARG M 18 61.485 13.315 81.373 1.00 23.60 ATOM 19 CA VAL M 19 60.925 12.368 85.033 1.00 23.83 ATOM 20 CA ASN M 20 59.624 14.584 87.882 1.00 23.16 ATOM 21 CA ILE M 21 59.918 13.584 91.629 1.00 17.54 ATOM 22 CA ALA M 22 57.924 15.604 94.192 1.00 16.62 ATOM 23 CA CYS M 23 58.804 16.350 97.816 1.00 18.46 ATOM 24 CA ARG M 24 56.406 17.991 100.321 1.00 25.96 ATOM 25 CA ALA M 25 57.400 19.783 103.459 1.00 23.98 ATOM 26 CA SER M 26 54.735 19.382 106.238 1.00 26.04 ATOM 27 CA GLN M 27 55.094 23.201 106.586 1.00 30.74 ATOM 28 CA GLY M 28 56.867 26.089 104.826 1.00 22.50 ATOM 29 CA ILE M 29 60.656 25.919 104.426 1.00 23.00 ATOM 30 CA SER M 30 61.121 28.780 101.922 1.00 28.25 ATOM 31 CA SER M 31 63.939 27.531 99.629 1.00 24.99 ATOM 32 CA ALA M 32 65.888 25.440 102.119 1.00 18.53 ATOM 33 CA LEU M 33 65.781 22.227 100.236 1.00 14.34 ATOM 34 CA ALA M 34 68.702 20.192 98.858 1.00 12.12 ATOM 35 CA TRP M 35 68.403 17.043 96.563 1.00 11.73 ATOM 36 CA TYR M 36 70.880 14.078 96.704 1.00 12.91 ATOM 37 CA GLN M 37 71.586 11.208 94.377 1.00 14.01 ATOM 38 CA GLN M 38 72.717 7.915 95.973 1.00 17.89 ATOM 39 CA LYS M 39 73.894 5.075 93.759 1.00 28.11 ATOM 40 CA PRO M 40 73.329 1.829 95.606 1.00 48.58 ATOM 41 CA GLY M 41 76.176 1.255 98.042 1.00 50.05 ATOM 42 CA LYS M 42 77.720 4.684 97.970 1.00 36.39 ATOM 43 CA ALA M 43 77.780 7.881 99.769 1.00 25.74 ATOM 44 CA PRO M 44 74.998 10.311 98.746 1.00 19.57 ATOM 45 CA ARG M 45 75.923 13.156 96.297 1.00 18.49 ATOM 46 CA LEU M 46 74.656 16.732 96.189 1.00 16.21 ATOM 47 CA LEU M 47 72.829 17.739 93.000 1.00 12.87 ATOM 48 CA ILE M 48 70.807 20.795 93.963 1.00 14.65 ATOM 49 CA TYR M 49 70.841 23.188 96.993 1.00 17.16 ATOM 50 CA ASP M 50 68.490 26.149 97.794 1.00 18.89 ATOM 51 CA ALA M 51 65.692 24.369 95.805 1.00 18.17 ATOM 52 CA SER M 52 67.105 25.321 92.425 1.00 20.97 ATOM 53 CA ASN M 53 70.924 25.871 92.390 1.00 19.22 ATOM 54 CA LEU M 54 72.916 23.070 90.639 1.00 19.53 ATOM 55 CA GLU M 55 76.074 22.103 92.410 1.00 17.43 ATOM 56 CA SER M 56 79.244 22.563 90.241 1.00 20.00 ATOM 57 CA GLY M 57 79.910 19.564 87.911 1.00 20.01 ATOM 58 CA VAL M 58 76.260 18.197 87.996 1.00 21.23 ATOM 59 CA PRO M 59 74.842 17.655 84.466 1.00 16.07 ATOM 60 CA SER M 60 72.616 20.368 83.080 1.00 22.82 ATOM 61 CA ARG M 61 69.722 17.821 82.672 1.00 21.29 ATOM 62 CA PHE M 62 69.006 18.031 86.424 1.00 17.51 ATOM 63 CA SER M 63 66.839 20.988 87.556 1.00 19.32 ATOM 64 CA GLY M 64 64.788 21.722 90.711 1.00 20.78 ATOM 65 CA SER M 65 61.866 24.014 91.522 1.00 23.83 ATOM 66 CA GLY M 66 59.488 24.939 94.357 1.00 21.33 ATOM 67 CA SER M 67 59.237 27.257 97.293 1.00 24.78 ATOM 68 CA GLY M 68 57.288 27.045 100.516 1.00 20.79 ATOM 69 CA THR M 69 56.058 23.507 100.765 1.00 21.84 ATOM 70 CA ASP M 70 56.190 21.768 97.316 1.00 22.29 ATOM 71 CA PHE M 71 59.431 21.046 95.466 1.00 18.92 ATOM 72 CA THR M 72 60.151 19.163 92.150 1.00 16.74 ATOM 73 CA LEU M 73 63.362 17.635 90.818 1.00 17.41 ATOM 74 CA THR M 74 63.209 17.111 86.980 1.00 18.15 ATOM 75 CA ILE M 75 65.639 14.916 85.000 1.00 18.09 ATOM 76 CA SER M 76 64.939 16.129 81.483 1.00 26.38 ATOM 77 CA SER M 77 66.404 13.226 79.439 1.00 21.00 ATOM 78 CA LEU M 78 66.902 10.158 81.611 1.00 18.63 ATOM 79 CA GLN M 79 70.206 8.407 80.976 1.00 18.79 ATOM 80 CA PRO M 80 71.326 4.766 82.235 1.00 20.11 ATOM 81 CA GLU M 81 73.746 6.289 84.679 1.00 20.56 ATOM 82 CA ASP M 82 70.808 8.014 86.392 1.00 17.09 ATOM 83 CA PHE M 83 69.736 4.780 88.152 1.00 19.73 ATOM 84 CA ALA M 84 69.809 5.747 91.837 1.00 14.48 ATOM 85 CA ILE M 85 67.694 6.577 94.910 1.00 18.56 ATOM 86 CA TYR M 86 67.018 10.349 95.096 1.00 15.43 ATOM 87 CA TYR M 87 66.438 12.191 98.520 1.00 12.46 ATOM 88 CA CYS M 88 65.312 15.644 99.468 1.00 17.01 ATOM 89 CA GLN M 89 66.442 17.164 102.769 1.00 17.53 ATOM 90 CA GLN M 90 65.210 20.395 104.536 1.00 15.70 ATOM 91 CA PHE M 91 67.572 22.710 106.471 1.00 19.77 ATOM 92 CA ASN M 92 65.141 25.333 107.605 1.00 24.81 ATOM 93 CA SER M 93 64.683 23.752 111.043 1.00 25.13 ATOM 94 CA TYR M 94 66.507 21.402 113.398 1.00 27.26 ATOM 95 CA PRO M 95 66.321 18.281 113.352 1.00 22.87 ATOM 96 CA LEU M 96 67.376 18.413 109.749 1.00 17.90 ATOM 97 CA THR M 97 65.209 15.809 107.979 1.00 20.34 ATOM 98 CA PHE M 98 65.264 13.686 104.832 1.00 20.06 ATOM 99 CA GLY M 99 62.509 12.413 102.680 1.00 18.84 ATOM 100 CA GLY M 100 61.976 8.683 102.174 1.00 20.40 ATOM 101 CA GLY M 101 63.541 8.230 98.665 1.00 17.69 ATOM 102 CA THR M 102 62.444 7.770 95.077 1.00 17.17 ATOM 103 CA LYS M 103 64.196 4.825 93.392 1.00 19.91 ATOM 104 CA VAL M 104 64.510 5.370 89.637 1.00 19.16 ATOM 105 CA GLU M 105 65.049 2.162 87.579 1.00 24.03 ATOM 106 CA ILE M 106 65.718 2.291 83.764 1.00 24.32 ATOM 107 CA LYS M 107 63.313 0.517 81.296 1.00 25.43 TER