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 ARG THR VAL ALA ALA PRO SER VAL PHE ILE PHE PRO PRO SEQRES 2 N 107 SER ASP GLU GLN LEU LYS SER GLY THR ALA SER VAL VAL SEQRES 3 N 107 CYS LEU LEU ASN ASN PHE TYR PRO ARG GLU ALA LYS VAL SEQRES 4 N 107 GLN TRP LYS VAL ASP ASN ALA LEU GLN SER GLY ASN SER SEQRES 5 N 107 GLN GLU SER VAL THR GLU GLN ASP SER LYS ASP SER THR SEQRES 6 N 107 TYR SER LEU SER SER THR LEU THR LEU SER LYS ALA ASP SEQRES 7 N 107 TYR GLU LYS HIS LYS VAL TYR ALA CYS GLU VAL THR HIS SEQRES 8 N 107 GLN GLY LEU SER SER PRO VAL THR LYS SER PHE ASN ARG SEQRES 9 N 107 GLY GLU CYS ATOM 1 CA ARG N 108 16.392 132.244 30.054 1.00 24.49 ATOM 2 CA THR N 109 18.437 132.496 26.812 1.00 29.53 ATOM 3 CA VAL N 110 20.650 135.550 26.099 1.00 29.75 ATOM 4 CA ALA N 111 18.965 138.423 24.371 1.00 23.83 ATOM 5 CA ALA N 112 20.985 141.287 22.970 1.00 21.37 ATOM 6 CA PRO N 113 19.763 144.778 23.691 1.00 22.37 ATOM 7 CA SER N 114 18.248 147.339 21.327 1.00 26.25 ATOM 8 CA VAL N 115 20.189 150.570 21.962 1.00 23.61 ATOM 9 CA PHE N 116 18.818 154.094 21.610 1.00 24.26 ATOM 10 CA ILE N 117 20.359 157.492 22.405 1.00 27.56 ATOM 11 CA PHE N 118 18.459 160.754 22.989 1.00 34.05 ATOM 12 CA PRO N 119 19.856 164.342 22.881 1.00 42.24 ATOM 13 CA PRO N 120 18.843 167.055 25.489 1.00 36.96 ATOM 14 CA SER N 121 15.523 168.665 24.641 1.00 39.63 ATOM 15 CA ASP N 122 15.373 172.363 23.824 1.00 49.87 ATOM 16 CA GLU N 123 13.525 173.538 26.869 1.00 43.74 ATOM 17 CA GLN N 124 15.898 171.567 28.991 1.00 38.32 ATOM 18 CA LEU N 125 18.946 173.484 27.605 1.00 43.28 ATOM 19 CA LYS N 126 16.859 176.647 28.365 1.00 49.04 ATOM 20 CA SER N 127 17.277 175.805 32.128 1.00 49.80 ATOM 21 CA GLY N 128 21.062 175.651 31.783 1.00 47.11 ATOM 22 CA THR N 129 21.324 171.734 32.014 1.00 43.85 ATOM 23 CA ALA N 130 21.589 168.931 29.511 1.00 34.62 ATOM 24 CA SER N 131 20.665 165.276 30.148 1.00 27.40 ATOM 25 CA VAL N 132 21.677 162.761 27.474 1.00 24.83 ATOM 26 CA VAL N 133 19.937 159.330 27.759 1.00 21.58 ATOM 27 CA CYS N 134 21.082 155.982 26.360 1.00 19.24 ATOM 28 CA LEU N 135 18.482 153.154 26.408 1.00 20.22 ATOM 29 CA LEU N 136 19.270 149.442 26.259 1.00 20.07 ATOM 30 CA ASN N 137 15.915 147.753 25.742 1.00 21.10 ATOM 31 CA ASN N 138 14.990 144.174 26.453 1.00 21.31 ATOM 32 CA PHE N 139 17.985 142.060 27.204 1.00 24.82 ATOM 33 CA TYR N 140 19.047 138.994 29.182 1.00 24.60 ATOM 34 CA PRO N 141 21.297 138.443 31.380 1.00 24.13 ATOM 35 CA ARG N 142 21.174 141.718 33.368 1.00 29.02 ATOM 36 CA GLU N 143 24.910 142.471 33.204 1.00 38.03 ATOM 37 CA ALA N 144 25.826 145.079 30.549 1.00 31.79 ATOM 38 CA LYS N 145 28.347 147.969 30.436 1.00 33.25 ATOM 39 CA VAL N 146 27.548 151.494 29.133 1.00 33.79 ATOM 40 CA GLN N 147 30.442 153.836 28.396 1.00 37.56 ATOM 41 CA TRP N 148 29.997 157.477 27.457 1.00 33.14 ATOM 42 CA LYS N 149 32.503 159.193 25.193 1.00 33.87 ATOM 43 CA VAL N 150 32.207 162.925 24.387 1.00 38.45 ATOM 44 CA ASP N 151 34.594 164.047 21.585 1.00 52.78 ATOM 45 CA ASN N 152 35.531 160.479 20.873 1.00 62.57 ATOM 46 CA ALA N 153 37.603 158.676 23.562 1.00 68.87 ATOM 47 CA LEU N 154 37.190 161.472 26.121 1.00 64.52 ATOM 48 CA GLN N 155 35.101 158.930 27.871 1.00 56.73 ATOM 49 CA SER N 156 33.488 160.122 31.028 1.00 51.84 ATOM 50 CA GLY N 157 32.612 159.298 34.726 1.00 52.14 ATOM 51 CA ASN N 158 29.401 161.529 35.475 1.00 46.46 ATOM 52 CA SER N 159 26.428 159.240 34.601 1.00 38.82 ATOM 53 CA GLN N 160 23.723 157.405 36.564 1.00 35.88 ATOM 54 CA GLU N 161 21.941 154.136 35.680 1.00 30.57 ATOM 55 CA SER N 162 18.541 152.573 36.322 1.00 24.52 ATOM 56 CA VAL N 163 17.506 148.966 35.510 1.00 21.28 ATOM 57 CA THR N 164 13.938 147.769 35.525 1.00 26.66 ATOM 58 CA GLU N 165 12.870 144.494 37.298 1.00 29.01 ATOM 59 CA GLN N 166 12.390 141.321 35.212 1.00 23.36 ATOM 60 CA ASP N 167 9.460 141.441 32.840 1.00 23.58 ATOM 61 CA SER N 168 6.802 138.835 33.688 1.00 28.49 ATOM 62 CA LYS N 169 6.172 138.106 30.028 1.00 35.63 ATOM 63 CA ASP N 170 9.638 137.647 28.448 1.00 28.71 ATOM 64 CA SER N 171 12.075 137.749 31.413 1.00 22.47 ATOM 65 CA THR N 172 14.187 140.668 30.170 1.00 21.14 ATOM 66 CA TYR N 173 15.558 143.857 31.725 1.00 22.96 ATOM 67 CA SER N 174 15.838 147.322 30.225 1.00 20.50 ATOM 68 CA LEU N 175 18.379 149.942 31.391 1.00 18.39 ATOM 69 CA SER N 176 18.926 153.727 31.094 1.00 20.18 ATOM 70 CA SER N 177 22.095 155.674 31.544 1.00 22.83 ATOM 71 CA THR N 178 21.724 159.440 31.959 1.00 25.67 ATOM 72 CA LEU N 179 24.741 161.625 31.387 1.00 31.29 ATOM 73 CA THR N 180 24.217 165.080 32.889 1.00 36.96 ATOM 74 CA LEU N 181 26.290 168.111 32.059 1.00 41.68 ATOM 75 CA SER N 182 25.683 171.858 32.163 1.00 42.32 ATOM 76 CA LYS N 183 24.410 173.756 29.008 1.00 44.83 ATOM 77 CA ALA N 184 27.928 175.290 28.697 1.00 49.35 ATOM 78 CA ASP N 185 29.670 171.909 28.980 1.00 55.55 ATOM 79 CA TYR N 186 27.391 170.404 26.382 1.00 51.76 ATOM 80 CA GLU N 187 27.926 173.500 24.119 1.00 55.70 ATOM 81 CA LYS N 188 31.565 172.805 23.758 1.00 52.94 ATOM 82 CA HIS N 189 31.638 169.259 22.514 1.00 55.05 ATOM 83 CA LYS N 190 30.055 167.797 19.349 1.00 52.83 ATOM 84 CA VAL N 191 30.163 163.923 19.198 1.00 47.03 ATOM 85 CA TYR N 192 28.196 162.341 22.056 1.00 38.28 ATOM 86 CA ALA N 193 28.274 158.535 22.123 1.00 34.05 ATOM 87 CA CYS N 194 26.973 155.572 24.112 1.00 33.19 ATOM 88 CA GLU N 195 29.053 152.354 23.797 1.00 34.51 ATOM 89 CA VAL N 196 27.435 149.099 24.942 1.00 28.87 ATOM 90 CA THR N 197 28.905 145.759 25.911 1.00 27.94 ATOM 91 CA HIS N 198 26.682 142.763 26.629 1.00 28.54 ATOM 92 CA GLN N 199 26.973 138.984 26.009 1.00 33.17 ATOM 93 CA GLY N 200 24.387 138.768 23.175 1.00 27.71 ATOM 94 CA LEU N 201 26.160 141.297 20.940 1.00 25.11 ATOM 95 CA SER N 202 29.060 140.172 18.694 1.00 34.19 ATOM 96 CA SER N 203 30.773 143.558 18.927 1.00 35.61 ATOM 97 CA PRO N 204 30.394 146.594 21.292 1.00 33.06 ATOM 98 CA VAL N 205 27.613 148.824 19.947 1.00 34.47 ATOM 99 CA THR N 206 27.862 152.633 19.633 1.00 35.46 ATOM 100 CA LYS N 207 25.020 155.105 19.152 1.00 36.49 ATOM 101 CA SER N 208 26.265 158.648 18.603 1.00 38.05 ATOM 102 CA PHE N 209 24.898 162.003 17.570 1.00 41.72 ATOM 103 CA ASN N 210 26.353 165.340 16.612 1.00 54.97 ATOM 104 CA ARG N 211 25.466 168.461 18.640 1.00 61.26 ATOM 105 CA GLY N 212 23.439 170.319 15.973 1.00 79.44 ATOM 106 CA GLU N 213 20.666 167.736 15.085 1.00 93.23 ATOM 107 CA CYS N 214 17.949 168.225 12.363 1.00101.74 TER