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 B 1 475 UNP P01876 IGHA1_HUMAN 1 475 SEQRES 1 B 108 ASN THR PHE ARG PRO GLU VAL HIS LEU LEU PRO PRO PRO SEQRES 2 B 108 SER GLU GLU LEU ALA LEU ASN GLU LEU VAL THR LEU THR SEQRES 3 B 108 CYS LEU ALA ARG GLY PHE SER PRO LYS ASP VAL LEU VAL SEQRES 4 B 108 ARG TRP LEU GLN GLY SER GLN GLU LEU PRO ARG GLU LYS SEQRES 5 B 108 TYR LEU THR TRP ALA SER ARG GLN GLU PRO SER GLN GLY SEQRES 6 B 108 THR THR THR PHE ALA VAL THR SER ILE LEU ARG VAL ALA SEQRES 7 B 108 ALA GLU ASP TRP LYS LYS GLY ASP THR PHE SER CYS MET SEQRES 8 B 108 VAL GLY HIS GLU ALA LEU PRO LEU ALA PHE THR GLN LYS SEQRES 9 B 108 THR ILE ASP ARG ATOM 1 CA ASN B 346 16.874 -17.962 -3.441 0.00 0.00 ATOM 2 CA THR B 347 17.175 -20.879 -6.001 0.00 0.00 ATOM 3 CA PHE B 348 15.341 -24.321 -6.146 0.00 0.00 ATOM 4 CA ARG B 349 16.025 -27.291 -8.572 0.00 0.00 ATOM 5 CA PRO B 350 13.100 -27.999 -11.051 0.00 0.00 ATOM 6 CA GLU B 351 11.522 -31.481 -10.775 0.00 0.00 ATOM 7 CA VAL B 352 10.774 -32.552 -14.421 0.00 0.00 ATOM 8 CA HIS B 353 8.187 -35.394 -14.900 0.00 0.00 ATOM 9 CA LEU B 354 7.040 -36.376 -18.449 0.00 0.00 ATOM 10 CA LEU B 355 3.402 -37.543 -18.725 0.00 0.00 ATOM 11 CA PRO B 356 2.098 -39.693 -21.667 0.00 0.00 ATOM 12 CA PRO B 357 -1.423 -39.033 -23.139 0.00 0.00 ATOM 13 CA PRO B 358 -4.662 -40.174 -21.437 0.00 0.00 ATOM 14 CA SER B 359 -6.303 -43.419 -22.764 0.00 0.00 ATOM 15 CA GLU B 360 -9.378 -41.406 -24.002 0.00 0.00 ATOM 16 CA GLU B 361 -7.159 -38.977 -26.074 0.00 0.00 ATOM 17 CA LEU B 362 -6.025 -42.028 -28.172 0.00 0.00 ATOM 18 CA ALA B 363 -9.648 -41.992 -29.516 0.00 0.00 ATOM 19 CA LEU B 364 -8.473 -38.633 -31.092 0.00 0.00 ATOM 20 CA ASN B 365 -6.161 -38.462 -34.211 0.00 0.00 ATOM 21 CA GLU B 366 -4.192 -35.363 -35.512 0.00 0.00 ATOM 22 CA LEU B 367 -2.647 -34.284 -32.134 0.00 0.00 ATOM 23 CA VAL B 368 -1.568 -36.509 -29.155 0.00 0.00 ATOM 24 CA THR B 369 -1.020 -34.456 -26.044 0.00 0.00 ATOM 25 CA LEU B 370 2.537 -35.100 -24.669 0.00 0.00 ATOM 26 CA THR B 371 2.872 -33.242 -21.349 0.00 0.00 ATOM 27 CA CYS B 372 5.908 -32.371 -19.207 0.00 0.00 ATOM 28 CA LEU B 373 5.429 -30.927 -15.691 0.00 0.00 ATOM 29 CA ALA B 374 8.284 -28.714 -14.365 0.00 0.00 ATOM 30 CA ARG B 375 7.495 -28.137 -10.647 0.00 0.00 ATOM 31 CA GLY B 376 9.040 -26.805 -7.376 0.00 0.00 ATOM 32 CA PHE B 377 11.451 -24.399 -9.185 0.00 0.00 ATOM 33 CA SER B 378 12.719 -20.861 -8.263 0.00 0.00 ATOM 34 CA PRO B 379 13.262 -18.254 -9.471 0.00 0.00 ATOM 35 CA LYS B 380 10.529 -18.289 -12.222 0.00 0.00 ATOM 36 CA ASP B 381 13.299 -17.880 -14.791 0.00 0.00 ATOM 37 CA VAL B 382 13.281 -21.098 -16.949 0.00 0.00 ATOM 38 CA LEU B 383 13.443 -22.356 -20.606 0.00 0.00 ATOM 39 CA VAL B 384 11.573 -25.492 -21.692 0.00 0.00 ATOM 40 CA ARG B 385 11.907 -26.984 -25.228 0.00 0.00 ATOM 41 CA TRP B 386 10.924 -30.275 -26.945 0.00 0.00 ATOM 42 CA LEU B 387 12.949 -32.647 -29.180 0.00 0.00 ATOM 43 CA GLN B 388 12.096 -35.540 -31.545 0.00 0.00 ATOM 44 CA GLY B 389 14.334 -38.683 -31.189 0.00 0.00 ATOM 45 CA SER B 390 13.013 -40.267 -34.464 0.00 0.00 ATOM 46 CA GLN B 391 14.409 -37.452 -36.756 0.00 0.00 ATOM 47 CA GLU B 392 17.215 -36.151 -34.388 0.00 0.00 ATOM 48 CA LEU B 393 15.620 -32.641 -34.568 0.00 0.00 ATOM 49 CA PRO B 394 13.833 -29.976 -32.424 0.00 0.00 ATOM 50 CA ARG B 395 9.986 -29.994 -32.549 0.00 0.00 ATOM 51 CA GLU B 396 7.419 -27.346 -33.596 0.00 0.00 ATOM 52 CA LYS B 397 3.871 -28.033 -32.329 0.00 0.00 ATOM 53 CA TYR B 398 4.340 -27.224 -28.625 0.00 0.00 ATOM 54 CA LEU B 399 2.999 -24.580 -26.196 0.00 0.00 ATOM 55 CA THR B 400 4.203 -23.689 -22.618 0.00 0.00 ATOM 56 CA TRP B 401 1.915 -22.011 -19.968 0.00 0.00 ATOM 57 CA ALA B 402 2.746 -20.494 -16.455 0.00 0.00 ATOM 58 CA SER B 403 1.984 -20.697 -12.634 0.00 0.00 ATOM 59 CA ARG B 404 3.788 -18.819 -9.753 0.00 0.00 ATOM 60 CA GLN B 405 2.587 -20.476 -6.459 0.00 0.00 ATOM 61 CA GLU B 406 2.105 -18.070 -3.453 0.00 0.00 ATOM 62 CA PRO B 407 -0.567 -18.544 -0.669 0.00 0.00 ATOM 63 CA SER B 408 -0.657 -16.926 2.873 0.00 0.00 ATOM 64 CA GLN B 409 2.135 -19.285 4.177 0.00 0.00 ATOM 65 CA GLY B 410 5.965 -19.427 3.659 0.00 0.00 ATOM 66 CA THR B 411 5.546 -21.917 0.733 0.00 0.00 ATOM 67 CA THR B 412 6.390 -20.046 -2.568 0.00 0.00 ATOM 68 CA THR B 413 7.936 -21.853 -5.676 0.00 0.00 ATOM 69 CA PHE B 414 6.709 -22.137 -9.379 0.00 0.00 ATOM 70 CA ALA B 415 5.141 -24.790 -11.648 0.00 0.00 ATOM 71 CA VAL B 416 4.550 -24.962 -15.456 0.00 0.00 ATOM 72 CA THR B 417 3.131 -27.553 -17.868 0.00 0.00 ATOM 73 CA SER B 418 4.443 -27.780 -21.478 0.00 0.00 ATOM 74 CA ILE B 419 2.216 -29.383 -24.157 0.00 0.00 ATOM 75 CA LEU B 420 3.766 -31.088 -27.271 0.00 0.00 ATOM 76 CA ARG B 421 1.013 -32.128 -29.704 0.00 0.00 ATOM 77 CA VAL B 422 1.864 -35.092 -32.085 0.00 0.00 ATOM 78 CA ALA B 423 0.120 -37.379 -34.636 0.00 0.00 ATOM 79 CA ALA B 424 -1.364 -40.494 -32.836 0.00 0.00 ATOM 80 CA GLU B 425 0.670 -42.722 -35.248 0.00 0.00 ATOM 81 CA ASP B 426 4.262 -41.456 -34.415 0.00 0.00 ATOM 82 CA TRP B 427 3.720 -42.042 -30.649 0.00 0.00 ATOM 83 CA LYS B 428 2.556 -45.643 -31.556 0.00 0.00 ATOM 84 CA LYS B 429 5.511 -46.033 -34.033 0.00 0.00 ATOM 85 CA GLY B 430 7.554 -46.051 -30.749 0.00 0.00 ATOM 86 CA ASP B 431 9.115 -42.579 -31.034 0.00 0.00 ATOM 87 CA THR B 432 11.060 -41.025 -28.129 0.00 0.00 ATOM 88 CA PHE B 433 10.176 -37.348 -27.452 0.00 0.00 ATOM 89 CA SER B 434 12.225 -35.408 -24.841 0.00 0.00 ATOM 90 CA CYS B 435 11.378 -32.312 -22.794 0.00 0.00 ATOM 91 CA MET B 436 14.592 -30.252 -22.192 0.00 0.00 ATOM 92 CA VAL B 437 14.502 -27.884 -19.161 0.00 0.00 ATOM 93 CA GLY B 438 17.148 -25.155 -18.580 0.00 0.00 ATOM 94 CA HIS B 439 17.283 -23.469 -15.160 0.00 0.00 ATOM 95 CA GLU B 440 19.779 -21.701 -12.767 0.00 0.00 ATOM 96 CA ALA B 441 19.657 -24.626 -10.224 0.00 0.00 ATOM 97 CA LEU B 442 19.986 -27.578 -12.698 0.00 0.00 ATOM 98 CA PRO B 443 23.306 -29.618 -12.574 0.00 0.00 ATOM 99 CA LEU B 444 24.794 -28.414 -15.926 0.00 0.00 ATOM 100 CA ALA B 445 22.064 -25.677 -16.199 0.00 0.00 ATOM 101 CA PHE B 446 20.285 -28.338 -18.310 0.00 0.00 ATOM 102 CA THR B 447 18.249 -31.522 -17.759 0.00 0.00 ATOM 103 CA GLN B 448 16.222 -33.598 -20.251 0.00 0.00 ATOM 104 CA LYS B 449 13.468 -36.155 -19.369 0.00 0.00 ATOM 105 CA THR B 450 12.181 -38.544 -22.099 0.00 0.00 ATOM 106 CA ILE B 451 8.750 -39.991 -23.196 0.00 0.00 ATOM 107 CA ASP B 452 8.030 -43.014 -25.468 0.00 0.00 ATOM 108 CA ARG B 453 5.232 -45.633 -26.050 0.00 0.00 TER