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 ARG THR VAL ALA ALA PRO SER VAL PHE ILE PHE PRO PRO SEQRES 2 M 107 SER ASP GLU GLN LEU LYS SER GLY THR ALA SER VAL VAL SEQRES 3 M 107 CYS LEU LEU ASN ASN PHE TYR PRO ARG GLU ALA LYS VAL SEQRES 4 M 107 GLN TRP LYS VAL ASP ASN ALA LEU GLN SER GLY ASN SER SEQRES 5 M 107 GLN GLU SER VAL THR GLU GLN ASP SER LYS ASP SER THR SEQRES 6 M 107 TYR SER LEU SER SER THR LEU THR LEU SER LYS ALA ASP SEQRES 7 M 107 TYR GLU LYS HIS LYS VAL TYR ALA CYS GLU VAL THR HIS SEQRES 8 M 107 GLN GLY LEU SER SER PRO VAL THR LYS SER PHE ASN ARG SEQRES 9 M 107 GLY GLU CYS ATOM 1 CA ARG M 108 64.959 -1.139 78.259 1.00 24.49 ATOM 2 CA THR M 109 64.564 -4.021 75.749 1.00 29.53 ATOM 3 CA VAL M 110 64.586 -7.679 76.909 1.00 29.75 ATOM 4 CA ALA M 111 67.956 -9.311 77.108 1.00 23.83 ATOM 5 CA ALA M 112 68.268 -13.043 77.596 1.00 21.37 ATOM 6 CA PRO M 113 70.753 -14.246 80.162 1.00 22.37 ATOM 7 CA SER M 114 74.048 -16.068 79.660 1.00 26.25 ATOM 8 CA VAL M 115 73.917 -19.064 82.033 1.00 23.61 ATOM 9 CA PHE M 116 76.898 -20.687 83.737 1.00 24.26 ATOM 10 CA ILE M 117 77.112 -23.475 86.330 1.00 27.56 ATOM 11 CA PHE M 118 80.067 -24.177 88.650 1.00 34.05 ATOM 12 CA PRO M 119 80.796 -27.415 90.608 1.00 42.24 ATOM 13 CA PRO M 120 82.078 -27.380 94.288 1.00 36.96 ATOM 14 CA SER M 121 85.813 -26.801 94.481 1.00 39.63 ATOM 15 CA ASP M 122 88.072 -29.489 95.908 1.00 49.87 ATOM 16 CA GLU M 123 89.096 -27.747 99.068 1.00 43.74 ATOM 17 CA GLN M 124 85.498 -26.937 99.711 1.00 38.32 ATOM 18 CA LEU M 125 84.511 -30.667 99.682 1.00 43.28 ATOM 19 CA LYS M 126 87.505 -31.117 102.089 1.00 49.04 ATOM 20 CA SER M 127 85.467 -29.112 104.710 1.00 49.80 ATOM 21 CA GLY M 128 82.501 -31.467 104.368 1.00 47.11 ATOM 22 CA THR M 129 80.244 -28.969 102.331 1.00 43.85 ATOM 23 CA ALA M 130 79.474 -28.440 98.683 1.00 34.62 ATOM 24 CA SER M 131 78.152 -25.210 97.127 1.00 27.40 ATOM 25 CA VAL M 132 76.994 -25.401 93.502 1.00 24.83 ATOM 26 CA VAL M 133 76.549 -21.978 91.779 1.00 21.58 ATOM 27 CA CYS M 134 74.433 -21.130 88.733 1.00 19.24 ATOM 28 CA LEU M 135 75.061 -17.688 87.148 1.00 20.22 ATOM 29 CA LEU M 136 72.617 -15.818 84.924 1.00 20.07 ATOM 30 CA ASN M 137 74.608 -12.913 83.512 1.00 21.10 ATOM 31 CA ASN M 138 73.299 -9.695 82.058 1.00 21.31 ATOM 32 CA PHE M 139 69.602 -9.797 81.500 1.00 24.82 ATOM 33 CA TYR M 140 66.540 -7.546 81.395 1.00 24.60 ATOM 34 CA PRO M 141 63.730 -7.555 82.905 1.00 24.13 ATOM 35 CA ARG M 142 64.799 -8.707 86.401 1.00 29.02 ATOM 36 CA GLU M 143 62.266 -11.544 86.721 1.00 38.03 ATOM 37 CA ALA M 144 63.754 -15.006 86.025 1.00 31.79 ATOM 38 CA LYS M 145 63.243 -18.471 87.589 1.00 33.25 ATOM 39 CA VAL M 146 66.095 -20.874 88.515 1.00 33.79 ATOM 40 CA GLN M 147 65.226 -24.494 89.257 1.00 37.56 ATOM 41 CA TRP M 148 67.731 -27.022 90.550 1.00 33.14 ATOM 42 CA LYS M 149 67.375 -30.691 89.677 1.00 33.87 ATOM 43 CA VAL M 150 69.761 -33.308 91.130 1.00 38.45 ATOM 44 CA ASP M 151 69.382 -36.763 89.477 1.00 52.78 ATOM 45 CA ASN M 152 67.083 -35.333 86.874 1.00 62.57 ATOM 46 CA ALA M 153 63.616 -34.194 88.077 1.00 68.87 ATOM 47 CA LEU M 154 64.483 -34.599 91.769 1.00 64.52 ATOM 48 CA GLN M 155 64.265 -30.877 91.753 1.00 56.73 ATOM 49 CA SER M 156 65.073 -29.242 95.014 1.00 51.84 ATOM 50 CA GLY M 157 64.097 -26.489 97.584 1.00 52.14 ATOM 51 CA ASN M 158 67.515 -25.651 99.444 1.00 46.46 ATOM 52 CA SER M 159 69.021 -22.752 97.405 1.00 38.82 ATOM 53 CA GLN M 160 69.579 -19.024 97.959 1.00 35.88 ATOM 54 CA GLU M 161 69.650 -16.212 95.363 1.00 30.57 ATOM 55 CA SER M 162 71.349 -12.837 94.979 1.00 24.52 ATOM 56 CA VAL M 163 70.630 -10.229 92.253 1.00 21.28 ATOM 57 CA THR M 164 72.857 -7.275 91.564 1.00 26.66 ATOM 58 CA GLU M 165 71.457 -3.686 91.153 1.00 29.01 ATOM 59 CA GLN M 166 70.950 -2.277 87.630 1.00 23.36 ATOM 60 CA ASP M 167 74.145 -1.652 85.726 1.00 23.58 ATOM 61 CA SER M 168 74.658 2.044 84.925 1.00 28.49 ATOM 62 CA LYS M 169 76.036 1.237 81.493 1.00 35.63 ATOM 63 CA ASP M 170 73.587 -1.287 79.958 1.00 28.71 ATOM 64 CA SER M 171 70.695 -1.486 82.473 1.00 22.47 ATOM 65 CA THR M 172 70.907 -5.234 83.123 1.00 21.14 ATOM 66 CA TYR M 173 70.896 -7.439 86.223 1.00 22.96 ATOM 67 CA SER M 174 72.926 -10.547 86.958 1.00 20.50 ATOM 68 CA LEU M 175 71.832 -13.268 89.424 1.00 18.39 ATOM 69 CA SER M 176 73.402 -16.203 91.333 1.00 20.18 ATOM 70 CA SER M 177 71.711 -19.188 92.830 1.00 22.83 ATOM 71 CA THR M 178 73.758 -21.228 95.310 1.00 25.67 ATOM 72 CA LEU M 179 72.657 -24.741 96.104 1.00 31.29 ATOM 73 CA THR M 180 74.300 -25.991 99.297 1.00 36.96 ATOM 74 CA LEU M 181 74.459 -29.604 100.348 1.00 41.68 ATOM 75 CA SER M 182 76.794 -31.629 102.557 1.00 42.32 ATOM 76 CA LYS M 183 79.832 -33.525 101.030 1.00 44.83 ATOM 77 CA ALA M 184 77.912 -36.803 101.670 1.00 49.35 ATOM 78 CA ASP M 185 74.732 -35.530 99.996 1.00 55.55 ATOM 79 CA TYR M 186 76.671 -34.348 96.989 1.00 51.76 ATOM 80 CA GLU M 187 78.574 -37.720 96.886 1.00 55.70 ATOM 81 CA LYS M 188 75.454 -39.640 96.219 1.00 52.94 ATOM 82 CA HIS M 189 74.038 -37.943 93.184 1.00 55.05 ATOM 83 CA LYS M 190 75.633 -37.466 89.735 1.00 52.83 ATOM 84 CA VAL M 191 73.651 -35.079 87.412 1.00 47.03 ATOM 85 CA TYR M 192 73.446 -31.551 88.853 1.00 38.28 ATOM 86 CA ALA M 193 71.447 -29.091 86.747 1.00 34.05 ATOM 87 CA CYS M 194 70.311 -25.467 86.691 1.00 33.19 ATOM 88 CA GLU M 195 67.149 -24.776 84.622 1.00 34.51 ATOM 89 CA VAL M 196 66.408 -21.151 83.703 1.00 28.87 ATOM 90 CA THR M 197 63.229 -19.430 82.614 1.00 27.94 ATOM 91 CA HIS M 198 63.243 -15.798 81.489 1.00 28.54 ATOM 92 CA GLN M 199 61.320 -13.796 78.833 1.00 33.17 ATOM 93 CA GLY M 200 64.230 -13.374 76.361 1.00 27.71 ATOM 94 CA LEU M 201 64.854 -17.115 75.970 1.00 25.11 ATOM 95 CA SER M 202 62.750 -19.164 73.502 1.00 34.19 ATOM 96 CA SER M 203 63.013 -22.304 75.628 1.00 35.61 ATOM 97 CA PRO M 204 64.036 -22.975 79.298 1.00 33.06 ATOM 98 CA VAL M 205 67.827 -23.353 79.435 1.00 34.47 ATOM 99 CA THR M 206 69.651 -26.123 81.344 1.00 35.46 ATOM 100 CA LYS M 207 73.318 -26.228 82.330 1.00 36.49 ATOM 101 CA SER M 208 74.296 -29.542 83.901 1.00 38.05 ATOM 102 CA PHE M 209 77.421 -31.368 84.944 1.00 41.72 ATOM 103 CA ASN M 210 78.274 -34.860 86.059 1.00 54.97 ATOM 104 CA ARG M 211 79.857 -35.434 89.495 1.00 61.26 ATOM 105 CA GLY M 212 83.309 -36.627 88.341 1.00 79.44 ATOM 106 CA GLU M 213 84.514 -33.662 86.124 1.00 93.23 ATOM 107 CA CYS M 214 87.844 -33.568 84.145 1.00101.74 TER