HEADER IMMUNE SYSTEM 02-AUG-07 2QTJ TITLE Solution structure of human dimeric immunoglobulin A COMPND MOL_ID: 2; COMPND 2 MOLECULE: Ig alpha-1 chain C region; COMPND 3 CHAIN: A, B, C, D; EXPDTA SOLUTION SCATTERING DBREF 2QTJ D 1 475 UNP P01876 IGHA1_HUMAN 1 475 SEQRES 1 D 108 ASN THR PHE ARG PRO GLU VAL HIS LEU LEU PRO PRO PRO SEQRES 2 D 108 SER GLU GLU LEU ALA LEU ASN GLU LEU VAL THR LEU THR SEQRES 3 D 108 CYS LEU ALA ARG GLY PHE SER PRO LYS ASP VAL LEU VAL SEQRES 4 D 108 ARG TRP LEU GLN GLY SER GLN GLU LEU PRO ARG GLU LYS SEQRES 5 D 108 TYR LEU THR TRP ALA SER ARG GLN GLU PRO SER GLN GLY SEQRES 6 D 108 THR THR THR PHE ALA VAL THR SER ILE LEU ARG VAL ALA SEQRES 7 D 108 ALA GLU ASP TRP LYS LYS GLY ASP THR PHE SER CYS MET SEQRES 8 D 108 VAL GLY HIS GLU ALA LEU PRO LEU ALA PHE THR GLN LYS SEQRES 9 D 108 THR ILE ASP ARG ATOM 1 CA ASN D 346 -32.295 -72.702 -24.288 0.00 0.00 ATOM 2 CA THR D 347 -30.633 -69.210 -24.736 0.00 0.00 ATOM 3 CA PHE D 348 -27.384 -67.729 -23.161 0.00 0.00 ATOM 4 CA ARG D 349 -26.051 -64.078 -23.424 0.00 0.00 ATOM 5 CA PRO D 350 -22.715 -63.764 -25.418 0.00 0.00 ATOM 6 CA GLU D 351 -19.749 -62.351 -23.443 0.00 0.00 ATOM 7 CA VAL D 352 -17.862 -60.066 -25.937 0.00 0.00 ATOM 8 CA HIS D 353 -14.191 -59.197 -25.059 0.00 0.00 ATOM 9 CA LEU D 354 -12.025 -57.226 -27.569 0.00 0.00 ATOM 10 CA LEU D 355 -8.303 -58.134 -27.581 0.00 0.00 ATOM 11 CA PRO D 356 -5.564 -55.774 -28.962 0.00 0.00 ATOM 12 CA PRO D 357 -2.580 -57.225 -30.959 0.00 0.00 ATOM 13 CA PRO D 358 0.390 -59.001 -29.310 0.00 0.00 ATOM 14 CA SER D 359 3.618 -56.927 -28.793 0.00 0.00 ATOM 15 CA GLU D 360 5.524 -59.195 -31.297 0.00 0.00 ATOM 16 CA GLU D 361 2.879 -58.614 -34.088 0.00 0.00 ATOM 17 CA LEU D 362 3.801 -54.854 -33.983 0.00 0.00 ATOM 18 CA ALA D 363 7.146 -56.003 -35.540 0.00 0.00 ATOM 19 CA LEU D 364 4.846 -56.846 -38.564 0.00 0.00 ATOM 20 CA ASN D 365 3.418 -54.130 -40.950 0.00 0.00 ATOM 21 CA GLU D 366 0.510 -54.541 -43.509 0.00 0.00 ATOM 22 CA LEU D 367 -2.008 -56.284 -41.145 0.00 0.00 ATOM 23 CA VAL D 368 -2.459 -55.812 -37.329 0.00 0.00 ATOM 24 CA THR D 369 -4.540 -58.580 -35.846 0.00 0.00 ATOM 25 CA LEU D 370 -7.543 -57.069 -33.933 0.00 0.00 ATOM 26 CA THR D 371 -9.391 -59.924 -32.194 0.00 0.00 ATOM 27 CA CYS D 372 -12.832 -60.113 -30.554 0.00 0.00 ATOM 28 CA LEU D 373 -13.826 -63.205 -28.522 0.00 0.00 ATOM 29 CA ALA D 374 -17.593 -63.962 -28.321 0.00 0.00 ATOM 30 CA ARG D 375 -17.946 -66.730 -25.677 0.00 0.00 ATOM 31 CA GLY D 376 -20.564 -68.589 -23.542 0.00 0.00 ATOM 32 CA PHE D 377 -23.414 -68.035 -26.081 0.00 0.00 ATOM 33 CA SER D 378 -26.384 -70.281 -27.138 0.00 0.00 ATOM 34 CA PRO D 379 -27.857 -71.131 -29.517 0.00 0.00 ATOM 35 CA LYS D 380 -24.954 -71.031 -32.086 0.00 0.00 ATOM 36 CA ASP D 381 -26.997 -68.537 -34.097 0.00 0.00 ATOM 37 CA VAL D 382 -25.000 -65.216 -34.086 0.00 0.00 ATOM 38 CA LEU D 383 -23.797 -62.336 -36.376 0.00 0.00 ATOM 39 CA VAL D 384 -20.474 -60.581 -35.749 0.00 0.00 ATOM 40 CA ARG D 385 -19.330 -57.520 -37.788 0.00 0.00 ATOM 41 CA TRP D 386 -16.563 -54.874 -37.489 0.00 0.00 ATOM 42 CA LEU D 387 -16.700 -51.050 -37.767 0.00 0.00 ATOM 43 CA GLN D 388 -14.105 -48.263 -38.206 0.00 0.00 ATOM 44 CA GLY D 389 -14.575 -45.185 -35.900 0.00 0.00 ATOM 45 CA SER D 390 -12.027 -43.040 -37.871 0.00 0.00 ATOM 46 CA GLN D 391 -14.110 -43.022 -41.155 0.00 0.00 ATOM 47 CA GLU D 392 -17.607 -43.739 -39.596 0.00 0.00 ATOM 48 CA LEU D 393 -17.898 -46.833 -41.885 0.00 0.00 ATOM 49 CA PRO D 394 -18.086 -50.687 -41.816 0.00 0.00 ATOM 50 CA ARG D 395 -14.769 -52.561 -42.367 0.00 0.00 ATOM 51 CA GLU D 396 -13.640 -55.103 -45.006 0.00 0.00 ATOM 52 CA LYS D 397 -10.537 -57.111 -44.005 0.00 0.00 ATOM 53 CA TYR D 398 -12.072 -59.391 -41.351 0.00 0.00 ATOM 54 CA LEU D 399 -12.688 -63.157 -40.983 0.00 0.00 ATOM 55 CA THR D 400 -14.865 -65.052 -38.391 0.00 0.00 ATOM 56 CA TRP D 401 -14.253 -68.760 -37.416 0.00 0.00 ATOM 57 CA ALA D 402 -16.399 -71.235 -35.270 0.00 0.00 ATOM 58 CA SER D 403 -16.420 -73.516 -32.104 0.00 0.00 ATOM 59 CA ARG D 404 -19.443 -75.406 -30.563 0.00 0.00 ATOM 60 CA GLN D 405 -18.285 -76.643 -27.075 0.00 0.00 ATOM 61 CA GLU D 406 -19.636 -80.118 -25.997 0.00 0.00 ATOM 62 CA PRO D 407 -17.688 -82.633 -23.761 0.00 0.00 ATOM 63 CA SER D 408 -19.102 -85.659 -21.757 0.00 0.00 ATOM 64 CA GLN D 409 -20.613 -83.336 -19.040 0.00 0.00 ATOM 65 CA GLY D 410 -23.710 -81.020 -18.931 0.00 0.00 ATOM 66 CA THR D 411 -21.565 -77.988 -20.004 0.00 0.00 ATOM 67 CA THR D 412 -22.521 -77.074 -23.660 0.00 0.00 ATOM 68 CA THR D 413 -22.345 -73.411 -25.028 0.00 0.00 ATOM 69 CA PHE D 414 -20.416 -71.872 -28.063 0.00 0.00 ATOM 70 CA ALA D 415 -17.345 -69.662 -28.642 0.00 0.00 ATOM 71 CA VAL D 416 -15.991 -67.821 -31.749 0.00 0.00 ATOM 72 CA THR D 417 -13.049 -65.502 -32.462 0.00 0.00 ATOM 73 CA SER D 418 -13.332 -62.762 -35.150 0.00 0.00 ATOM 74 CA ILE D 419 -10.121 -61.381 -36.728 0.00 0.00 ATOM 75 CA LEU D 420 -9.997 -57.783 -38.157 0.00 0.00 ATOM 76 CA ARG D 421 -6.658 -57.181 -39.909 0.00 0.00 ATOM 77 CA VAL D 422 -5.479 -53.473 -40.119 0.00 0.00 ATOM 78 CA ALA D 423 -2.377 -51.451 -41.154 0.00 0.00 ATOM 79 CA ALA D 424 0.025 -51.049 -38.118 0.00 0.00 ATOM 80 CA GLU D 425 -0.154 -47.223 -38.621 0.00 0.00 ATOM 81 CA ASP D 426 -3.996 -46.701 -38.212 0.00 0.00 ATOM 82 CA TRP D 427 -4.010 -48.582 -34.852 0.00 0.00 ATOM 83 CA LYS D 428 -1.103 -46.248 -33.735 0.00 0.00 ATOM 84 CA LYS D 429 -2.938 -43.167 -35.204 0.00 0.00 ATOM 85 CA GLY D 430 -5.335 -43.864 -32.249 0.00 0.00 ATOM 86 CA ASP D 431 -8.279 -45.275 -34.228 0.00 0.00 ATOM 87 CA THR D 432 -11.271 -46.886 -32.470 0.00 0.00 ATOM 88 CA PHE D 433 -12.421 -50.188 -34.063 0.00 0.00 ATOM 89 CA SER D 434 -15.628 -51.852 -32.749 0.00 0.00 ATOM 90 CA CYS D 435 -16.807 -55.470 -32.887 0.00 0.00 ATOM 91 CA MET D 436 -20.661 -55.555 -33.154 0.00 0.00 ATOM 92 CA VAL D 437 -22.334 -58.819 -31.988 0.00 0.00 ATOM 93 CA GLY D 438 -26.021 -59.635 -32.712 0.00 0.00 ATOM 94 CA HIS D 439 -27.636 -62.528 -30.819 0.00 0.00 ATOM 95 CA GLU D 440 -31.098 -63.733 -29.536 0.00 0.00 ATOM 96 CA ALA D 441 -30.099 -63.164 -25.832 0.00 0.00 ATOM 97 CA LEU D 442 -28.463 -59.679 -26.187 0.00 0.00 ATOM 98 CA PRO D 443 -30.340 -56.677 -24.555 0.00 0.00 ATOM 99 CA LEU D 444 -31.514 -54.956 -27.805 0.00 0.00 ATOM 100 CA ALA D 445 -30.445 -58.052 -29.877 0.00 0.00 ATOM 101 CA PHE D 446 -27.222 -56.028 -30.346 0.00 0.00 ATOM 102 CA THR D 447 -24.064 -55.195 -28.365 0.00 0.00 ATOM 103 CA GLN D 448 -20.834 -53.491 -29.503 0.00 0.00 ATOM 104 CA LYS D 449 -17.432 -53.624 -27.684 0.00 0.00 ATOM 105 CA THR D 450 -14.635 -51.206 -28.755 0.00 0.00 ATOM 106 CA ILE D 451 -10.790 -51.382 -29.261 0.00 0.00 ATOM 107 CA ASP D 452 -8.265 -48.490 -29.536 0.00 0.00 ATOM 108 CA ARG D 453 -4.500 -47.824 -28.892 0.00 0.00 TER