HEADER IMMUNE SYSTEM 10-MAR-08 3CHN TITLE Solution structure of human secretory IgA1 COMPND MOL_ID: 4; COMPND 2 MOLECULE: Secretory component; COMPND 3 CHAIN: S; EXPDTA SOLUTION SCATTERING DBREF 3CHN S 1 585 UNP P01833 PIGR_HUMAN 19 603 SEQRES 1 S 108 SER PRO ILE PHE GLY PRO GLU GLU VAL ASN SER VAL GLU SEQRES 2 S 108 GLY ASN SER VAL SER ILE THR CYS TYR TYR PRO PRO THR SEQRES 3 S 108 SER VAL ASN ARG HIS THR ARG LYS TYR TRP CYS ARG GLN SEQRES 4 S 108 GLY ALA ARG GLY GLY CYS ILE THR LEU ILE SER SER GLU SEQRES 5 S 108 GLY TYR VAL SER SER LYS TYR ALA GLY ARG ALA ASN LEU SEQRES 6 S 108 THR ASN PHE PRO GLU ASN GLY THR PHE VAL VAL ASN ILE SEQRES 7 S 108 ALA GLN LEU SER GLN ASP ASP SER GLY ARG TYR LYS CYS SEQRES 8 S 108 GLY LEU GLY ILE ASN SER ARG GLY LEU SER PHE ASP VAL SEQRES 9 S 108 SER LEU GLU VAL ATOM 1 CA SER S 2 44.024 -7.543 7.925 1.00104.39 ATOM 2 CA PRO S 3 46.665 -8.373 10.402 1.00184.79 ATOM 3 CA ILE S 4 49.479 -6.903 8.383 1.00 81.97 ATOM 4 CA PHE S 5 50.693 -3.337 8.442 1.00110.58 ATOM 5 CA GLY S 6 53.321 -1.254 6.688 1.00 29.38 ATOM 6 CA PRO S 7 53.900 2.023 4.942 1.00152.03 ATOM 7 CA GLU S 8 50.710 3.359 3.457 1.00 66.23 ATOM 8 CA GLU S 9 52.680 5.397 1.001 1.00 40.60 ATOM 9 CA VAL S 10 56.296 5.506 -0.027 1.00 40.33 ATOM 10 CA ASN S 11 57.937 8.247 -2.045 1.00 36.69 ATOM 11 CA SER S 12 61.303 8.049 -3.735 1.00 46.21 ATOM 12 CA VAL S 13 63.331 9.204 -6.728 1.00135.81 ATOM 13 CA GLU S 14 64.216 7.508 -10.012 1.00222.79 ATOM 14 CA GLY S 15 67.738 6.649 -9.058 1.00172.30 ATOM 15 CA ASN S 16 67.221 5.402 -5.588 1.00111.71 ATOM 16 CA SER S 17 66.237 2.372 -3.641 1.00 37.21 ATOM 17 CA VAL S 18 63.428 1.963 -1.188 1.00110.87 ATOM 18 CA SER S 19 63.060 -0.367 1.714 1.00 47.94 ATOM 19 CA ILE S 20 59.572 -1.374 2.601 1.00 65.57 ATOM 20 CA THR S 21 58.933 -3.047 5.920 1.00 54.28 ATOM 21 CA CYS S 22 55.702 -4.882 6.641 1.00 53.00 ATOM 22 CA TYR S 23 54.642 -6.233 9.979 1.00143.28 ATOM 23 CA TYR S 24 52.755 -9.434 10.704 1.00 91.17 ATOM 24 CA PRO S 25 51.866 -11.060 13.981 1.00168.85 ATOM 25 CA PRO S 26 54.639 -13.039 15.505 1.00109.78 ATOM 26 CA THR S 27 53.294 -16.513 14.970 1.00137.65 ATOM 27 CA SER S 28 54.926 -19.736 14.070 1.00 72.86 ATOM 28 CA VAL S 29 52.418 -19.918 11.272 1.00105.38 ATOM 29 CA ASN S 30 53.420 -16.544 9.950 1.00 54.92 ATOM 30 CA ARG S 31 57.058 -17.190 10.582 1.00107.16 ATOM 31 CA HIS S 32 56.844 -20.061 8.111 1.00 74.94 ATOM 32 CA THR S 33 54.299 -18.722 5.609 1.00 55.30 ATOM 33 CA ARG S 34 55.192 -17.397 2.196 1.00 72.03 ATOM 34 CA LYS S 35 55.786 -13.653 2.213 1.00153.82 ATOM 35 CA TYR S 36 55.029 -11.741 -0.942 1.00 73.61 ATOM 36 CA TRP S 37 55.232 -8.377 -2.672 1.00103.57 ATOM 37 CA CYS S 38 52.923 -7.873 -5.626 1.00 47.25 ATOM 38 CA ARG S 39 51.691 -5.065 -7.811 1.00106.94 ATOM 39 CA GLN S 40 48.054 -4.263 -8.362 1.00 48.79 ATOM 40 CA GLY S 41 47.132 -4.148 -11.991 1.00 16.91 ATOM 41 CA ALA S 42 44.588 -1.750 -13.371 1.00 28.32 ATOM 42 CA ARG S 43 42.552 -4.866 -14.030 1.00110.28 ATOM 43 CA GLY S 44 42.357 -5.649 -10.355 1.00 42.87 ATOM 44 CA GLY S 45 44.811 -8.492 -9.772 1.00 31.94 ATOM 45 CA CYS S 46 48.113 -8.458 -7.979 1.00107.48 ATOM 46 CA ILE S 47 51.077 -10.010 -9.669 1.00 60.00 ATOM 47 CA THR S 48 53.843 -11.330 -7.477 1.00 62.09 ATOM 48 CA LEU S 49 57.081 -9.441 -8.009 1.00 98.22 ATOM 49 CA ILE S 50 59.075 -11.206 -5.288 1.00188.74 ATOM 50 CA SER S 51 58.357 -13.915 -2.736 1.00100.15 ATOM 51 CA SER S 52 60.144 -15.600 0.157 1.00 94.58 ATOM 52 CA GLU S 53 59.514 -18.699 -1.896 1.00129.45 ATOM 53 CA GLY S 54 62.430 -17.724 -4.086 1.00 29.88 ATOM 54 CA TYR S 55 60.411 -16.519 -7.051 1.00 62.97 ATOM 55 CA VAL S 56 61.700 -13.244 -8.413 1.00 51.30 ATOM 56 CA SER S 57 60.190 -11.158 -11.174 1.00 37.29 ATOM 57 CA SER S 58 62.347 -10.722 -14.213 1.00 68.43 ATOM 58 CA LYS S 59 62.143 -6.976 -13.759 1.00138.19 ATOM 59 CA TYR S 60 63.220 -7.394 -10.127 1.00191.34 ATOM 60 CA ALA S 61 66.170 -9.685 -10.761 1.00 55.62 ATOM 61 CA GLY S 62 69.387 -8.407 -9.236 1.00 54.56 ATOM 62 CA ARG S 63 67.803 -5.156 -8.087 1.00157.29 ATOM 63 CA ALA S 64 65.694 -6.397 -5.179 1.00 58.72 ATOM 64 CA ASN S 65 65.576 -8.941 -2.388 1.00 61.10 ATOM 65 CA LEU S 66 63.084 -9.979 0.245 1.00108.50 ATOM 66 CA THR S 67 64.196 -10.842 3.755 1.00 52.03 ATOM 67 CA ASN S 68 62.268 -12.388 6.632 1.00 75.78 ATOM 68 CA PHE S 69 62.938 -11.301 10.202 1.00 82.89 ATOM 69 CA PRO S 70 61.010 -13.610 12.426 1.00 87.33 ATOM 70 CA GLU S 71 62.192 -11.899 15.567 1.00129.00 ATOM 71 CA ASN S 72 60.698 -8.604 14.468 1.00 51.42 ATOM 72 CA GLY S 73 57.659 -10.208 12.938 1.00 35.40 ATOM 73 CA THR S 74 58.476 -8.353 9.784 1.00 67.86 ATOM 74 CA PHE S 75 60.025 -8.759 6.367 1.00 65.66 ATOM 75 CA VAL S 76 61.711 -6.185 4.181 1.00 44.67 ATOM 76 CA VAL S 77 61.579 -5.669 0.468 1.00 43.69 ATOM 77 CA ASN S 78 64.499 -3.762 -0.950 1.00 53.76 ATOM 78 CA ILE S 79 64.086 -2.252 -4.359 1.00 67.05 ATOM 79 CA ALA S 80 66.957 -0.601 -6.152 1.00 62.25 ATOM 80 CA GLN S 81 67.237 1.177 -9.467 1.00 83.56 ATOM 81 CA LEU S 82 63.726 2.540 -9.058 1.00 75.23 ATOM 82 CA SER S 83 62.264 3.901 -12.262 1.00 53.78 ATOM 83 CA GLN S 84 59.222 6.009 -13.014 1.00 46.48 ATOM 84 CA ASP S 85 57.442 2.852 -14.071 1.00 57.77 ATOM 85 CA ASP S 86 57.782 1.606 -10.510 1.00 67.19 ATOM 86 CA SER S 87 55.198 4.122 -9.381 1.00 39.07 ATOM 87 CA GLY S 88 51.990 2.292 -8.626 1.00 22.78 ATOM 88 CA ARG S 89 50.092 0.322 -6.030 1.00 85.36 ATOM 89 CA TYR S 90 51.492 -2.790 -4.428 1.00 70.88 ATOM 90 CA LYS S 91 50.680 -5.135 -1.590 1.00 74.51 ATOM 91 CA CYS S 92 52.766 -7.025 0.916 1.00 47.59 ATOM 92 CA GLY S 93 51.181 -10.044 2.501 1.00 32.13 ATOM 93 CA LEU S 94 51.440 -13.585 3.752 1.00 66.43 ATOM 94 CA GLY S 95 50.183 -16.900 2.492 1.00 30.14 ATOM 95 CA ILE S 96 48.268 -17.263 -0.718 1.00119.59 ATOM 96 CA ASN S 97 47.597 -14.027 -2.528 1.00 90.33 ATOM 97 CA SER S 98 43.958 -15.099 -2.278 1.00173.91 ATOM 98 CA ARG S 99 43.499 -14.794 1.536 1.00194.52 ATOM 99 CA GLY S 100 43.561 -11.019 1.798 1.00 42.63 ATOM 100 CA LEU S 101 46.088 -10.997 4.561 1.00 82.38 ATOM 101 CA SER S 102 48.057 -8.138 3.131 1.00 49.08 ATOM 102 CA PHE S 103 48.754 -4.430 3.255 1.00 67.52 ATOM 103 CA ASP S 104 48.335 -1.900 0.470 1.00 52.19 ATOM 104 CA VAL S 105 51.342 0.225 -0.288 1.00112.41 ATOM 105 CA SER S 106 51.439 3.050 -2.741 1.00 39.17 ATOM 106 CA LEU S 107 54.781 3.878 -4.246 1.00115.15 ATOM 107 CA GLU S 108 55.435 7.052 -6.133 1.00 79.32 ATOM 108 CA VAL S 109 58.750 7.335 -7.879 1.00 21.18 TER