HEADER IMMUNE SYSTEM 02-AUG-07 2QTJ TITLE Solution structure of human dimeric immunoglobulin A COMPND MOL_ID: 1; COMPND 2 MOLECULE: Kappa light chain IgA1; COMPND 3 CHAIN: L, M, N, O; EXPDTA SOLUTION SCATTERING DBREF 2QTJ N 1 214 PDB 2QTJ 2QTJ 1 214 SEQRES 1 N 107 GLU LEU VAL MET THR GLN SER PRO SER SER LEU SER ALA SEQRES 2 N 107 SER VAL GLY ASP ARG VAL ASN ILE ALA CYS ARG ALA SER SEQRES 3 N 107 GLN GLY ILE SER SER ALA LEU ALA TRP TYR GLN GLN LYS SEQRES 4 N 107 PRO GLY LYS ALA PRO ARG LEU LEU ILE TYR ASP ALA SER SEQRES 5 N 107 ASN LEU GLU SER GLY VAL PRO SER ARG PHE SER GLY SER SEQRES 6 N 107 GLY SER GLY THR ASP PHE THR LEU THR ILE SER SER LEU SEQRES 7 N 107 GLN PRO GLU ASP PHE ALA ILE TYR TYR CYS GLN GLN PHE SEQRES 8 N 107 ASN SER TYR PRO LEU THR PHE GLY GLY GLY THR LYS VAL SEQRES 9 N 107 GLU ILE LYS ATOM 1 CA GLU N 1 -109.027 -90.649 -42.425 1.00 44.73 ATOM 2 CA LEU N 2 -105.687 -89.354 -41.178 1.00 35.54 ATOM 3 CA VAL N 3 -103.066 -90.147 -43.768 1.00 31.56 ATOM 4 CA MET N 4 -99.693 -91.585 -42.661 1.00 22.17 ATOM 5 CA THR N 5 -96.895 -91.124 -45.201 1.00 21.72 ATOM 6 CA GLN N 6 -93.484 -92.781 -44.775 1.00 21.28 ATOM 7 CA SER N 7 -90.244 -91.644 -46.264 1.00 26.91 ATOM 8 CA PRO N 8 -88.404 -93.341 -47.966 1.00 23.87 ATOM 9 CA SER N 9 -90.029 -96.374 -49.530 1.00 25.30 ATOM 10 CA SER N 10 -86.691 -98.274 -49.712 1.00 19.86 ATOM 11 CA LEU N 11 -83.180 -97.915 -48.321 1.00 23.29 ATOM 12 CA SER N 12 -80.081-100.109 -48.611 1.00 23.31 ATOM 13 CA ALA N 13 -77.390 -99.513 -45.991 1.00 17.57 ATOM 14 CA SER N 14 -74.373-101.431 -44.682 1.00 22.73 ATOM 15 CA VAL N 15 -74.285-103.039 -41.262 1.00 28.57 ATOM 16 CA GLY N 16 -73.129-100.540 -38.656 1.00 21.03 ATOM 17 CA ASP N 17 -74.849 -97.677 -40.469 1.00 22.77 ATOM 18 CA ARG N 18 -77.394 -95.519 -38.725 1.00 23.60 ATOM 19 CA VAL N 19 -80.740 -95.367 -40.565 1.00 23.83 ATOM 20 CA ASN N 20 -83.660 -92.948 -39.972 1.00 23.16 ATOM 21 CA ILE N 21 -87.214 -93.538 -41.443 1.00 17.54 ATOM 22 CA ALA N 22 -89.722 -90.654 -41.303 1.00 16.62 ATOM 23 CA CYS N 23 -93.510 -90.822 -40.991 1.00 18.46 ATOM 24 CA ARG N 24 -95.836 -87.797 -41.364 1.00 25.96 ATOM 25 CA ALA N 25 -99.327 -87.534 -40.020 1.00 23.98 ATOM 26 CA SER N 26 -101.575 -85.350 -42.289 1.00 26.04 ATOM 27 CA GLN N 27 -102.546 -83.617 -38.994 1.00 30.74 ATOM 28 CA GLY N 28 -101.533 -83.679 -35.310 1.00 22.50 ATOM 29 CA ILE N 29 -101.695 -86.999 -33.442 1.00 23.00 ATOM 30 CA SER N 30 -99.753 -86.003 -30.291 1.00 28.25 ATOM 31 CA SER N 31 -97.752 -89.165 -29.419 1.00 24.99 ATOM 32 CA ALA N 32 -100.164 -91.797 -30.694 1.00 18.53 ATOM 33 CA LEU N 33 -97.823 -93.500 -33.036 1.00 14.34 ATOM 34 CA ALA N 34 -96.611 -97.121 -32.959 1.00 12.12 ATOM 35 CA TRP N 35 -93.850 -98.650 -35.261 1.00 11.73 ATOM 36 CA TYR N 36 -93.913-102.309 -36.505 1.00 12.91 ATOM 37 CA GLN N 37 -91.315-104.540 -38.056 1.00 14.01 ATOM 38 CA GLN N 38 -92.547-107.164 -40.562 1.00 17.89 ATOM 39 CA LYS N 39 -90.134-109.774 -41.872 1.00 28.11 ATOM 40 CA PRO N 40 -91.359-110.920 -45.253 1.00 48.58 ATOM 41 CA GLY N 41 -94.085-113.516 -44.793 1.00 50.05 ATOM 42 CA LYS N 42 -94.767-113.010 -41.128 1.00 36.39 ATOM 43 CA ALA N 43 -97.018-111.279 -38.806 1.00 25.74 ATOM 44 CA PRO N 44 -95.964-107.688 -37.978 1.00 19.57 ATOM 45 CA ARG N 45 -94.145-107.091 -34.622 1.00 18.49 ATOM 46 CA LEU N 46 -94.391-104.130 -32.260 1.00 16.21 ATOM 47 CA LEU N 47 -91.148-102.207 -31.684 1.00 12.87 ATOM 48 CA ILE N 48 -92.243 -98.830 -30.361 1.00 14.65 ATOM 49 CA TYR N 49 -95.571 -97.438 -28.978 1.00 17.16 ATOM 50 CA ASP N 50 -96.442 -93.841 -27.873 1.00 18.89 ATOM 51 CA ALA N 51 -93.805 -92.514 -30.367 1.00 18.17 ATOM 52 CA SER N 52 -90.865 -93.375 -28.146 1.00 20.97 ATOM 53 CA ASN N 53 -91.497 -96.320 -25.735 1.00 19.22 ATOM 54 CA LEU N 54 -89.666 -99.576 -26.694 1.00 19.53 ATOM 55 CA GLU N 55 -91.728-102.674 -26.263 1.00 17.43 ATOM 56 CA SER N 56 -90.161-105.227 -23.812 1.00 20.00 ATOM 57 CA GLY N 57 -87.532-107.495 -25.489 1.00 20.01 ATOM 58 CA VAL N 58 -86.851-105.120 -28.509 1.00 21.23 ATOM 59 CA PRO N 59 -83.108-104.383 -28.945 1.00 16.07 ATOM 60 CA SER N 60 -81.825-101.132 -27.525 1.00 22.82 ATOM 61 CA ARG N 61 -80.600-100.049 -31.039 1.00 21.29 ATOM 62 CA PHE N 62 -84.189 -99.144 -32.013 1.00 17.51 ATOM 63 CA SER N 63 -85.410 -95.685 -30.884 1.00 19.32 ATOM 64 CA GLY N 64 -88.291 -93.404 -31.973 1.00 20.78 ATOM 65 CA SER N 65 -88.986 -89.675 -31.717 1.00 23.83 ATOM 66 CA GLY N 66 -91.534 -87.031 -32.750 1.00 21.33 ATOM 67 CA SER N 67 -94.715 -85.442 -31.557 1.00 24.78 ATOM 68 CA GLY N 68 -97.530 -83.744 -33.398 1.00 20.79 ATOM 69 CA THR N 69 -97.051 -84.562 -37.028 1.00 21.84 ATOM 70 CA ASP N 70 -93.442 -85.765 -37.694 1.00 22.29 ATOM 71 CA PHE N 71 -92.018 -88.986 -36.260 1.00 18.92 ATOM 72 CA THR N 72 -88.604 -90.755 -36.773 1.00 16.74 ATOM 73 CA LEU N 73 -87.559 -94.352 -36.137 1.00 17.41 ATOM 74 CA THR N 74 -83.707 -94.689 -35.847 1.00 18.15 ATOM 75 CA ILE N 75 -81.812 -98.010 -36.031 1.00 18.09 ATOM 76 CA SER N 76 -78.456 -96.952 -34.640 1.00 26.38 ATOM 77 CA SER N 77 -76.242 -99.829 -35.893 1.00 21.00 ATOM 78 CA LEU N 78 -77.975-101.768 -38.650 1.00 18.63 ATOM 79 CA GLN N 79 -77.589-105.523 -38.298 1.00 18.79 ATOM 80 CA PRO N 80 -78.441-108.337 -41.030 1.00 20.11 ATOM 81 CA GLU N 81 -81.426-109.458 -39.038 1.00 20.56 ATOM 82 CA ASP N 82 -82.914-105.972 -39.451 1.00 17.09 ATOM 83 CA PHE N 83 -83.980-106.686 -43.064 1.00 19.73 ATOM 84 CA ALA N 84 -87.735-106.053 -42.989 1.00 14.48 ATOM 85 CA ILE N 85 -90.540-103.669 -44.017 1.00 18.56 ATOM 86 CA TYR N 86 -91.191-101.090 -41.248 1.00 15.43 ATOM 87 CA TYR N 87 -94.727 -99.453 -40.720 1.00 12.46 ATOM 88 CA CYS N 88 -96.002 -96.627 -38.612 1.00 17.01 ATOM 89 CA GLN N 89 -99.632 -96.614 -37.454 1.00 17.53 ATOM 90 CA GLN N 90 -101.659 -93.774 -35.756 1.00 15.70 ATOM 91 CA PHE N 91 -104.257 -94.452 -33.024 1.00 19.77 ATOM 92 CA ASN N 92 -105.393 -90.948 -32.310 1.00 24.81 ATOM 93 CA SER N 93 -108.441 -91.224 -34.579 1.00 25.13 ATOM 94 CA TYR N 94 -110.664 -93.895 -36.104 1.00 27.26 ATOM 95 CA PRO N 95 -110.116 -95.393 -38.796 1.00 22.87 ATOM 96 CA LEU N 96 -106.778 -96.396 -37.393 1.00 17.90 ATOM 97 CA THR N 97 -104.325 -96.027 -40.302 1.00 20.34 ATOM 98 CA PHE N 98 -100.941 -97.353 -41.389 1.00 20.06 ATOM 99 CA GLY N 99 -98.224 -95.801 -43.405 1.00 18.84 ATOM 100 CA GLY N 100 -97.084 -97.349 -46.686 1.00 20.40 ATOM 101 CA GLY N 101 -93.827 -99.090 -45.535 1.00 17.69 ATOM 102 CA THR N 102 -90.087 -98.584 -45.727 1.00 17.17 ATOM 103 CA LYS N 103 -88.264-101.710 -46.944 1.00 19.91 ATOM 104 CA VAL N 104 -84.724-101.873 -45.543 1.00 19.16 ATOM 105 CA GLU N 105 -82.311-104.132 -47.515 1.00 24.03 ATOM 106 CA ILE N 106 -78.706-104.821 -46.271 1.00 24.32 ATOM 107 CA LYS N 107 -75.661-103.846 -48.462 1.00 25.43 TER