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 L 1 214 PDB 3CHN 3CHN 1 214 SEQRES 1 L 107 GLU LEU VAL MET THR GLN SER PRO SER SER LEU SER ALA SEQRES 2 L 107 SER VAL GLY ASP ARG VAL ASN ILE ALA CYS ARG ALA SER SEQRES 3 L 107 GLN GLY ILE SER SER ALA LEU ALA TRP TYR GLN GLN LYS SEQRES 4 L 107 PRO GLY LYS ALA PRO ARG LEU LEU ILE TYR ASP ALA SER SEQRES 5 L 107 ASN LEU GLU SER GLY VAL PRO SER ARG PHE SER GLY SER SEQRES 6 L 107 GLY SER GLY THR ASP PHE THR LEU THR ILE SER SER LEU SEQRES 7 L 107 GLN PRO GLU ASP PHE ALA ILE TYR TYR CYS GLN GLN PHE SEQRES 8 L 107 ASN SER TYR PRO LEU THR PHE GLY GLY GLY THR LYS VAL SEQRES 9 L 107 GLU ILE LYS ATOM 1 CA GLU L 1 47.632 -76.165 -2.051 1.00 44.73 ATOM 2 CA LEU L 2 46.400 -72.580 -2.196 1.00 35.54 ATOM 3 CA VAL L 3 48.087 -70.635 0.556 1.00 31.56 ATOM 4 CA MET L 4 46.019 -68.250 2.725 1.00 22.17 ATOM 5 CA THR L 5 48.074 -65.583 4.501 1.00 21.72 ATOM 6 CA GLN L 6 46.549 -63.273 7.129 1.00 21.28 ATOM 7 CA SER L 7 47.801 -59.890 8.129 1.00 26.91 ATOM 8 CA PRO L 8 48.478 -59.035 10.953 1.00 23.87 ATOM 9 CA SER L 9 49.116 -61.873 13.367 1.00 25.30 ATOM 10 CA SER L 10 48.079 -59.746 16.398 1.00 19.86 ATOM 11 CA LEU L 11 46.358 -56.428 17.038 1.00 23.29 ATOM 12 CA SER L 12 45.355 -54.650 20.253 1.00 23.31 ATOM 13 CA ALA L 13 42.715 -51.937 19.881 1.00 17.57 ATOM 14 CA SER L 14 40.349 -50.083 22.216 1.00 22.73 ATOM 15 CA VAL L 15 36.615 -50.674 22.253 1.00 28.57 ATOM 16 CA GLY L 16 34.903 -48.480 19.679 1.00 21.03 ATOM 17 CA ASP L 17 37.859 -48.758 17.306 1.00 22.77 ATOM 18 CA ARG L 18 37.419 -50.035 13.792 1.00 23.60 ATOM 19 CA VAL L 19 39.708 -52.985 12.974 1.00 23.83 ATOM 20 CA ASN L 20 40.481 -54.498 9.533 1.00 23.16 ATOM 21 CA ILE L 21 42.201 -57.961 9.095 1.00 17.54 ATOM 22 CA ALA L 22 43.489 -58.904 5.619 1.00 16.62 ATOM 23 CA CYS L 23 43.752 -62.359 4.048 1.00 18.46 ATOM 24 CA ARG L 24 45.533 -63.084 0.731 1.00 25.96 ATOM 25 CA ALA L 25 44.948 -66.064 -1.469 1.00 23.98 ATOM 26 CA SER L 26 48.170 -67.125 -3.330 1.00 26.04 ATOM 27 CA GLN L 27 45.898 -67.165 -6.434 1.00 30.74 ATOM 28 CA GLY L 28 42.314 -66.231 -7.381 1.00 22.50 ATOM 29 CA ILE L 29 39.450 -67.838 -5.443 1.00 23.00 ATOM 30 CA SER L 30 36.582 -65.608 -6.664 1.00 28.25 ATOM 31 CA SER L 31 34.345 -65.227 -3.564 1.00 24.99 ATOM 32 CA ALA L 32 34.983 -68.583 -1.922 1.00 18.53 ATOM 33 CA LEU L 33 36.168 -67.292 1.364 1.00 14.34 ATOM 34 CA ALA L 34 34.629 -67.835 4.818 1.00 12.12 ATOM 35 CA TRP L 35 35.771 -66.089 8.121 1.00 11.73 ATOM 36 CA TYR L 36 35.642 -67.809 11.581 1.00 12.91 ATOM 37 CA GLN L 37 35.870 -66.513 15.103 1.00 14.01 ATOM 38 CA GLN L 38 37.457 -68.831 17.709 1.00 17.89 ATOM 39 CA LYS L 39 37.361 -67.867 21.372 1.00 28.11 ATOM 40 CA PRO L 40 40.273 -69.528 23.105 1.00 48.58 ATOM 41 CA GLY L 41 39.375 -73.121 23.917 1.00 50.05 ATOM 42 CA LYS L 42 36.281 -73.448 21.799 1.00 36.39 ATOM 43 CA ALA L 43 35.110 -74.646 18.536 1.00 25.74 ATOM 44 CA PRO L 44 35.440 -72.079 15.708 1.00 19.57 ATOM 45 CA ARG L 45 32.262 -70.134 14.685 1.00 18.49 ATOM 46 CA LEU L 46 31.163 -68.988 11.237 1.00 16.21 ATOM 47 CA LEU L 47 30.787 -65.218 10.795 1.00 12.87 ATOM 48 CA ILE L 48 30.930 -64.660 7.050 1.00 14.65 ATOM 49 CA TYR L 49 30.678 -66.987 3.977 1.00 17.16 ATOM 50 CA ASP L 50 31.064 -66.132 0.229 1.00 18.89 ATOM 51 CA ALA L 51 33.407 -63.219 1.210 1.00 18.17 ATOM 52 CA SER L 52 30.583 -60.945 2.292 1.00 20.97 ATOM 53 CA ASN L 53 27.425 -62.796 3.515 1.00 19.22 ATOM 54 CA LEU L 54 26.870 -62.637 7.329 1.00 19.53 ATOM 55 CA GLU L 55 25.716 -65.863 8.841 1.00 17.43 ATOM 56 CA SER L 56 22.307 -65.572 10.649 1.00 20.00 ATOM 57 CA GLY L 57 22.633 -64.269 14.264 1.00 20.01 ATOM 58 CA VAL L 58 26.143 -62.639 13.765 1.00 21.23 ATOM 59 CA PRO L 59 26.202 -58.971 14.898 1.00 16.07 ATOM 60 CA SER L 60 25.829 -56.343 12.217 1.00 22.82 ATOM 61 CA ARG L 61 29.253 -54.817 13.199 1.00 21.29 ATOM 62 CA PHE L 62 31.048 -57.631 11.326 1.00 17.51 ATOM 63 CA SER L 63 31.418 -57.152 7.535 1.00 19.32 ATOM 64 CA GLY L 64 33.688 -58.718 4.875 1.00 20.78 ATOM 65 CA SER L 65 34.874 -57.660 1.421 1.00 23.83 ATOM 66 CA GLY L 66 37.166 -58.765 -1.422 1.00 21.33 ATOM 67 CA SER L 67 37.137 -60.874 -4.522 1.00 24.78 ATOM 68 CA GLY L 68 39.884 -62.655 -6.387 1.00 20.79 ATOM 69 CA THR L 69 42.868 -62.650 -4.111 1.00 21.84 ATOM 70 CA ASP L 70 42.478 -59.976 -1.352 1.00 22.29 ATOM 71 CA PHE L 71 39.794 -60.128 1.337 1.00 18.92 ATOM 72 CA THR L 72 39.096 -57.881 4.421 1.00 16.74 ATOM 73 CA LEU L 73 37.077 -58.553 7.568 1.00 17.41 ATOM 74 CA THR L 74 36.072 -55.260 9.350 1.00 18.15 ATOM 75 CA ILE L 75 34.768 -55.061 12.944 1.00 18.09 ATOM 76 CA SER L 76 33.319 -51.565 12.945 1.00 26.38 ATOM 77 CA SER L 77 33.106 -50.898 16.721 1.00 21.00 ATOM 78 CA LEU L 78 35.246 -53.361 18.652 1.00 18.63 ATOM 79 CA GLN L 79 33.540 -54.696 21.762 1.00 18.79 ATOM 80 CA PRO L 80 35.206 -56.762 24.772 1.00 20.11 ATOM 81 CA GLU L 81 33.456 -59.903 23.672 1.00 20.56 ATOM 82 CA ASP L 82 35.302 -59.672 20.343 1.00 17.09 ATOM 83 CA PHE L 83 38.555 -61.001 21.877 1.00 19.73 ATOM 84 CA ALA L 84 39.312 -64.070 19.752 1.00 14.48 ATOM 85 CA ILE L 85 41.549 -65.521 17.014 1.00 18.56 ATOM 86 CA TYR L 86 40.007 -64.902 13.554 1.00 15.43 ATOM 87 CA TYR L 87 40.665 -67.318 10.522 1.00 12.46 ATOM 88 CA CYS L 88 39.918 -67.155 6.850 1.00 17.01 ATOM 89 CA GLN L 89 39.439 -70.375 4.870 1.00 17.53 ATOM 90 CA GLN L 90 39.198 -70.884 1.031 1.00 15.70 ATOM 91 CA PHE L 91 36.858 -73.467 -0.558 1.00 19.77 ATOM 92 CA ASN L 92 37.613 -72.898 -4.189 1.00 24.81 ATOM 93 CA SER L 93 40.099 -75.779 -4.363 1.00 25.13 ATOM 94 CA TYR L 94 40.924 -78.989 -2.513 1.00 27.26 ATOM 95 CA PRO L 95 42.793 -79.213 -0.014 1.00 22.87 ATOM 96 CA LEU L 96 40.609 -76.659 1.669 1.00 17.90 ATOM 97 CA THR L 97 43.028 -74.347 3.519 1.00 20.34 ATOM 98 CA PHE L 98 43.019 -71.936 6.449 1.00 20.06 ATOM 99 CA GLY L 99 44.987 -68.843 7.091 1.00 18.84 ATOM 100 CA GLY L 100 47.285 -68.570 10.109 1.00 20.40 ATOM 101 CA GLY L 101 45.087 -66.425 12.461 1.00 17.69 ATOM 102 CA THR L 102 44.841 -62.858 13.689 1.00 17.17 ATOM 103 CA LYS L 103 44.571 -62.652 17.491 1.00 19.91 ATOM 104 CA VAL L 104 42.653 -59.543 18.569 1.00 19.16 ATOM 105 CA GLU L 105 43.289 -58.431 22.199 1.00 24.03 ATOM 106 CA ILE L 106 41.319 -55.501 23.797 1.00 24.32 ATOM 107 CA LYS L 107 43.193 -52.377 25.120 1.00 25.43 TER