HEADER IMMUNE SYSTEM 31-DEC-69 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 90 PRO GLU LEU VAL TYR GLU ASP LEU ARG GLY SER VAL THR SEQRES 2 S 90 PHE HIS CYS ALA LEU GLY PRO GLU VAL ALA ASN VAL ALA SEQRES 3 S 90 LYS PHE LEU CYS ARG GLN SER SER GLY GLU ASN CYS ASP SEQRES 4 S 90 VAL VAL VAL ASN THR LEU GLY LYS ARG ALA PRO ALA PHE SEQRES 5 S 90 GLU GLY ARG ILE LEU LEU ASN PRO GLN ASP LYS ASP GLY SEQRES 6 S 90 SER PHE SER VAL VAL ILE THR GLY LEU ARG LYS GLU ASP SEQRES 7 S 90 ALA GLY ARG TYR LEU CYS GLY ALA HIS SER ASP GLY ATOM 1 CA PRO S 224 47.566 31.254 -38.295 1.00129.70 ATOM 2 CA GLU S 225 44.586 32.606 -36.447 1.00 39.61 ATOM 3 CA LEU S 226 44.209 35.413 -38.897 1.00 86.51 ATOM 4 CA VAL S 227 45.732 35.996 -42.281 1.00 36.20 ATOM 5 CA TYR S 228 45.405 39.293 -44.070 1.00 93.48 ATOM 6 CA GLU S 229 46.591 40.065 -47.549 1.00 88.60 ATOM 7 CA ASP S 230 45.965 42.392 -50.437 1.00 50.39 ATOM 8 CA LEU S 231 44.088 41.600 -53.591 1.00 49.22 ATOM 9 CA ARG S 232 46.022 39.919 -56.366 1.00217.23 ATOM 10 CA GLY S 233 48.543 38.782 -53.828 1.00 23.40 ATOM 11 CA SER S 234 49.546 35.230 -53.143 1.00 34.69 ATOM 12 CA VAL S 235 49.193 33.801 -49.694 1.00 90.98 ATOM 13 CA THR S 236 50.318 30.694 -47.937 1.00 95.59 ATOM 14 CA PHE S 237 48.869 29.126 -44.849 1.00105.63 ATOM 15 CA HIS S 238 50.906 26.830 -42.676 1.00 66.98 ATOM 16 CA CYS S 239 49.187 24.343 -40.397 1.00 55.93 ATOM 17 CA ALA S 240 50.892 22.024 -37.903 1.00 47.95 ATOM 18 CA LEU S 241 49.957 18.556 -36.599 1.00109.16 ATOM 19 CA GLY S 242 51.017 15.292 -34.767 1.00187.97 ATOM 20 CA PRO S 243 51.792 11.691 -35.571 1.00199.83 ATOM 21 CA GLU S 244 48.519 10.070 -36.540 1.00 54.25 ATOM 22 CA VAL S 245 48.262 13.175 -38.544 1.00 73.73 ATOM 23 CA ALA S 246 51.334 12.556 -40.657 1.00 49.50 ATOM 24 CA ASN S 247 49.617 9.904 -42.756 1.00 68.50 ATOM 25 CA VAL S 248 46.085 11.258 -42.415 1.00 68.63 ATOM 26 CA ALA S 249 44.484 13.244 -45.221 1.00 46.11 ATOM 27 CA LYS S 250 44.994 16.983 -45.012 1.00102.63 ATOM 28 CA PHE S 251 42.360 19.368 -46.158 1.00 73.40 ATOM 29 CA LEU S 252 41.568 23.025 -46.493 1.00142.09 ATOM 30 CA CYS S 253 37.934 23.959 -46.493 1.00 54.20 ATOM 31 CA ARG S 254 35.805 27.053 -46.521 1.00114.19 ATOM 32 CA GLN S 255 33.269 27.380 -43.771 1.00107.69 ATOM 33 CA SER S 256 29.742 27.751 -44.959 1.00130.75 ATOM 34 CA SER S 257 26.367 28.191 -43.385 1.00153.82 ATOM 35 CA GLY S 258 25.259 25.112 -41.551 1.00 80.51 ATOM 36 CA GLU S 259 27.707 22.604 -40.245 1.00166.84 ATOM 37 CA ASN S 260 29.431 21.919 -43.511 1.00173.06 ATOM 38 CA CYS S 261 32.775 23.024 -44.787 1.00 87.30 ATOM 39 CA ASP S 262 33.481 22.465 -48.429 1.00 40.22 ATOM 40 CA VAL S 263 36.890 21.140 -49.169 1.00104.71 ATOM 41 CA VAL S 264 38.738 23.464 -51.476 1.00112.81 ATOM 42 CA VAL S 265 41.702 21.135 -51.796 1.00106.92 ATOM 43 CA ASN S 266 42.999 17.969 -50.176 1.00 64.01 ATOM 44 CA THR S 267 46.147 15.894 -49.861 1.00111.21 ATOM 45 CA LEU S 268 43.955 13.168 -51.338 1.00103.03 ATOM 46 CA GLY S 269 44.363 14.545 -54.802 1.00 42.20 ATOM 47 CA LYS S 270 41.094 16.357 -55.079 1.00 92.07 ATOM 48 CA ARG S 271 41.292 19.930 -56.258 1.00145.32 ATOM 49 CA ALA S 272 38.208 22.105 -56.533 1.00 32.98 ATOM 50 CA PRO S 273 37.723 23.848 -59.773 1.00125.00 ATOM 51 CA ALA S 274 37.684 27.271 -58.161 1.00 43.10 ATOM 52 CA PHE S 275 41.082 26.395 -56.752 1.00160.15 ATOM 53 CA GLU S 276 42.396 24.390 -59.688 1.00 66.49 ATOM 54 CA GLY S 277 45.635 25.887 -60.917 1.00 37.96 ATOM 55 CA ARG S 278 45.165 28.710 -58.441 1.00233.75 ATOM 56 CA ILE S 279 46.230 26.825 -55.337 1.00123.44 ATOM 57 CA LEU S 280 48.491 24.068 -54.079 1.00 65.05 ATOM 58 CA LEU S 281 48.534 22.081 -50.864 1.00122.02 ATOM 59 CA ASN S 282 51.702 20.287 -49.920 1.00 99.34 ATOM 60 CA PRO S 283 52.422 18.249 -46.895 1.00 92.25 ATOM 61 CA GLN S 284 55.714 17.893 -45.118 1.00 74.63 ATOM 62 CA ASP S 285 55.619 15.041 -42.664 1.00 87.51 ATOM 63 CA LYS S 286 58.982 15.735 -41.126 1.00 85.13 ATOM 64 CA ASP S 287 58.219 19.288 -40.163 1.00110.37 ATOM 65 CA GLY S 288 54.699 18.325 -39.272 1.00 59.38 ATOM 66 CA SER S 289 53.167 20.941 -41.453 1.00125.82 ATOM 67 CA PHE S 290 51.334 21.295 -44.680 1.00160.24 ATOM 68 CA SER S 291 51.066 24.473 -46.618 1.00 47.59 ATOM 69 CA VAL S 292 48.248 25.791 -48.699 1.00 47.53 ATOM 70 CA VAL S 293 49.349 28.271 -51.303 1.00 94.15 ATOM 71 CA ILE S 294 46.694 30.418 -52.875 1.00 52.52 ATOM 72 CA THR S 295 47.278 32.940 -55.606 1.00114.37 ATOM 73 CA GLY S 296 45.185 35.571 -57.311 1.00 32.49 ATOM 74 CA LEU S 297 43.570 36.499 -54.025 1.00 76.09 ATOM 75 CA ARG S 298 40.227 38.145 -54.594 1.00111.75 ATOM 76 CA LYS S 299 37.607 39.725 -52.400 1.00121.79 ATOM 77 CA GLU S 300 35.801 36.430 -52.686 1.00 85.15 ATOM 78 CA ASP S 301 38.636 34.881 -50.700 1.00 78.11 ATOM 79 CA ALA S 302 37.944 36.723 -47.455 1.00 39.12 ATOM 80 CA GLY S 303 36.127 34.437 -45.054 1.00 25.30 ATOM 81 CA ARG S 304 36.585 31.648 -42.539 1.00112.50 ATOM 82 CA TYR S 305 38.402 28.475 -43.437 1.00 80.43 ATOM 83 CA LEU S 306 39.607 25.370 -41.667 1.00111.31 ATOM 84 CA CYS S 307 42.645 23.264 -42.208 1.00 78.33 ATOM 85 CA GLY S 308 42.604 19.891 -40.614 1.00 45.41 ATOM 86 CA ALA S 309 43.256 16.211 -40.862 1.00 73.91 ATOM 87 CA HIS S 310 40.975 13.306 -41.594 1.00183.81 ATOM 88 CA SER S 311 37.403 14.048 -42.466 1.00 76.84 ATOM 89 CA ASP S 312 35.994 17.518 -42.016 1.00243.14 ATOM 90 CA GLY S 313 33.286 17.491 -39.395 1.00214.88 TER