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 L 1 214 PDB 2QTJ 2QTJ 1 214 SEQRES 1 L 107 GLU LEU VAL MET THR GLN SER PRO SER SER LEU SER ALA SEQRES 2 L 107 SER VAL GLY ASP ARG VAL ASN ILE ALA CYS ARG ALA SER SEQRES 3 L 107 GLN GLY ILE SER SER ALA LEU ALA TRP TYR GLN GLN LYS SEQRES 4 L 107 PRO GLY LYS ALA PRO ARG LEU LEU ILE TYR ASP ALA SER SEQRES 5 L 107 ASN LEU GLU SER GLY VAL PRO SER ARG PHE SER GLY SER SEQRES 6 L 107 GLY SER GLY THR ASP PHE THR LEU THR ILE SER SER LEU SEQRES 7 L 107 GLN PRO GLU ASP PHE ALA ILE TYR TYR CYS GLN GLN PHE SEQRES 8 L 107 ASN SER TYR PRO LEU THR PHE GLY GLY GLY THR LYS VAL SEQRES 9 L 107 GLU ILE LYS ATOM 1 CA GLU L 1 71.084 41.185 6.643 1.00 44.73 ATOM 2 CA LEU L 2 69.040 38.007 6.307 1.00 35.54 ATOM 3 CA VAL L 3 66.092 38.725 4.071 1.00 31.56 ATOM 4 CA MET L 4 62.616 37.462 5.066 1.00 22.17 ATOM 5 CA THR L 5 60.160 37.217 2.167 1.00 21.72 ATOM 6 CA GLN L 6 56.459 36.463 2.712 1.00 21.28 ATOM 7 CA SER L 7 54.094 34.961 0.229 1.00 26.91 ATOM 8 CA PRO L 8 51.460 36.174 -0.639 1.00 23.87 ATOM 9 CA SER L 9 51.121 39.882 0.014 1.00 25.30 ATOM 10 CA SER L 10 47.286 39.665 0.202 1.00 19.86 ATOM 11 CA LEU L 11 44.639 36.960 0.448 1.00 23.29 ATOM 12 CA SER L 12 40.846 37.119 0.752 1.00 23.31 ATOM 13 CA ALA L 13 39.163 33.964 2.048 1.00 17.57 ATOM 14 CA SER L 14 35.772 33.086 3.536 1.00 22.73 ATOM 15 CA VAL L 15 35.288 32.232 7.187 1.00 28.57 ATOM 16 CA GLY L 16 35.880 28.533 7.770 1.00 21.03 ATOM 17 CA ASP L 17 38.585 28.427 5.102 1.00 22.77 ATOM 18 CA ARG L 18 42.059 27.218 5.902 1.00 23.60 ATOM 19 CA VAL L 19 44.773 29.748 4.982 1.00 23.83 ATOM 20 CA ASN L 20 48.563 29.182 4.772 1.00 23.16 ATOM 21 CA ILE L 21 51.121 32.109 4.592 1.00 17.54 ATOM 22 CA ALA L 22 54.742 31.281 3.679 1.00 16.62 ATOM 23 CA CYS L 23 57.926 33.044 4.788 1.00 18.46 ATOM 24 CA ARG L 24 61.402 32.319 3.342 1.00 25.96 ATOM 25 CA ALA L 25 64.674 33.072 5.011 1.00 23.98 ATOM 26 CA SER L 26 67.431 33.933 2.436 1.00 26.04 ATOM 27 CA GLN L 27 69.532 31.394 4.420 1.00 30.74 ATOM 28 CA GLY L 28 69.075 28.900 7.280 1.00 22.50 ATOM 29 CA ILE L 29 67.750 30.190 10.615 1.00 23.00 ATOM 30 CA SER L 30 66.974 26.829 12.286 1.00 28.25 ATOM 31 CA SER L 31 63.765 27.526 14.281 1.00 24.99 ATOM 32 CA ALA L 32 64.336 31.179 15.118 1.00 18.53 ATOM 33 CA LEU L 33 61.195 32.510 13.625 1.00 14.34 ATOM 34 CA ALA L 34 58.331 34.340 15.370 1.00 12.12 ATOM 35 CA TRP L 35 54.925 35.328 13.732 1.00 11.73 ATOM 36 CA TYR L 36 52.974 38.531 14.667 1.00 12.91 ATOM 37 CA GLN L 37 49.439 39.657 14.054 1.00 14.01 ATOM 38 CA GLN L 38 48.861 43.421 13.636 1.00 17.89 ATOM 39 CA LYS L 39 45.320 44.759 13.459 1.00 28.11 ATOM 40 CA PRO L 40 45.382 48.005 11.534 1.00 48.58 ATOM 41 CA GLY L 41 46.444 50.820 13.842 1.00 50.05 ATOM 42 CA LYS L 42 47.720 48.767 16.726 1.00 36.39 ATOM 43 CA ALA L 43 50.796 47.385 18.170 1.00 25.74 ATOM 44 CA PRO L 44 51.818 43.983 16.728 1.00 19.57 ATOM 45 CA ARG L 45 50.968 40.838 18.805 1.00 18.49 ATOM 46 CA LEU L 46 52.962 37.635 19.224 1.00 16.21 ATOM 47 CA LEU L 47 51.240 34.451 18.021 1.00 12.87 ATOM 48 CA ILE L 48 54.046 31.953 17.535 1.00 14.65 ATOM 49 CA TYR L 49 57.757 31.841 18.604 1.00 17.16 ATOM 50 CA ASP L 50 60.458 29.206 17.775 1.00 18.89 ATOM 51 CA ALA L 51 58.584 28.426 14.487 1.00 18.17 ATOM 52 CA SER L 52 55.903 26.361 16.179 1.00 20.97 ATOM 53 CA ASN L 53 55.234 27.321 19.856 1.00 19.22 ATOM 54 CA LEU L 54 51.904 29.181 20.430 1.00 19.53 ATOM 55 CA GLU L 55 52.143 32.033 22.846 1.00 17.43 ATOM 56 CA SER L 56 49.802 31.648 25.904 1.00 20.00 ATOM 57 CA GLY L 57 46.208 32.855 25.201 1.00 20.01 ATOM 58 CA VAL L 58 46.472 32.595 21.317 1.00 21.23 ATOM 59 CA PRO L 59 43.601 30.538 19.812 1.00 16.07 ATOM 60 CA SER L 60 44.325 26.927 18.993 1.00 22.82 ATOM 61 CA ARG L 61 43.411 27.558 15.280 1.00 21.29 ATOM 62 CA PHE L 62 46.817 29.212 14.720 1.00 17.51 ATOM 63 CA SER L 63 49.750 26.826 14.056 1.00 19.32 ATOM 64 CA GLY L 64 53.236 27.271 12.528 1.00 20.78 ATOM 65 CA SER L 65 55.752 24.934 10.896 1.00 23.83 ATOM 66 CA GLY L 66 59.146 24.941 9.154 1.00 21.33 ATOM 67 CA SER L 67 62.809 24.730 9.931 1.00 24.78 ATOM 68 CA GLY L 68 65.854 25.956 8.081 1.00 20.79 ATOM 69 CA THR L 69 64.597 28.299 5.433 1.00 21.84 ATOM 70 CA ASP L 70 60.828 27.749 4.798 1.00 22.29 ATOM 71 CA PHE L 71 58.148 28.450 7.403 1.00 18.92 ATOM 72 CA THR L 72 54.276 28.294 7.234 1.00 16.74 ATOM 73 CA LEU L 73 51.635 29.876 9.459 1.00 17.41 ATOM 74 CA THR L 74 48.211 28.092 9.101 1.00 18.15 ATOM 75 CA ILE L 75 44.886 29.534 10.334 1.00 18.09 ATOM 76 CA SER L 76 42.725 26.429 10.238 1.00 26.38 ATOM 77 CA SER L 77 39.226 28.011 10.292 1.00 21.00 ATOM 78 CA LEU L 78 39.393 31.693 9.404 1.00 18.63 ATOM 79 CA GLN L 79 37.199 33.857 11.612 1.00 18.79 ATOM 80 CA PRO L 80 36.172 37.693 11.033 1.00 20.11 ATOM 81 CA GLU L 81 38.387 38.782 13.869 1.00 20.56 ATOM 82 CA ASP L 82 41.377 37.363 11.975 1.00 17.09 ATOM 83 CA PHE L 83 41.495 40.369 9.597 1.00 19.73 ATOM 84 CA ALA L 84 45.030 41.703 10.079 1.00 14.48 ATOM 85 CA ILE L 85 48.511 42.007 8.531 1.00 18.56 ATOM 86 CA TYR L 86 50.705 39.033 9.569 1.00 15.43 ATOM 87 CA TYR L 87 54.616 39.330 9.845 1.00 12.46 ATOM 88 CA CYS L 88 57.390 36.854 10.334 1.00 17.01 ATOM 89 CA GLN L 89 60.632 37.948 12.011 1.00 17.53 ATOM 90 CA GLN L 90 64.005 36.053 12.306 1.00 15.70 ATOM 91 CA PHE L 91 66.203 36.242 15.437 1.00 19.77 ATOM 92 CA ASN L 92 69.036 34.016 14.391 1.00 24.81 ATOM 93 CA SER L 93 71.226 36.931 13.285 1.00 25.13 ATOM 94 CA TYR L 94 71.586 40.659 13.899 1.00 27.26 ATOM 95 CA PRO L 95 70.038 42.907 12.370 1.00 22.87 ATOM 96 CA LEU L 96 66.847 41.202 13.385 1.00 17.90 ATOM 97 CA THR L 97 64.595 41.390 10.301 1.00 20.34 ATOM 98 CA PHE L 98 60.904 41.266 9.430 1.00 20.06 ATOM 99 CA GLY L 99 59.135 40.028 6.399 1.00 18.84 ATOM 100 CA GLY L 100 56.985 42.354 4.294 1.00 20.40 ATOM 101 CA GLY L 101 53.459 41.328 5.511 1.00 17.69 ATOM 102 CA THR L 102 50.501 39.293 4.329 1.00 17.17 ATOM 103 CA LYS L 103 47.214 41.212 4.623 1.00 19.91 ATOM 104 CA VAL L 104 44.278 38.842 5.149 1.00 19.16 ATOM 105 CA GLU L 105 40.837 40.309 4.241 1.00 24.03 ATOM 106 CA ILE L 106 37.559 38.351 4.905 1.00 24.32 ATOM 107 CA LYS L 107 35.195 37.444 1.971 1.00 25.43 TER