HEADER IMMUNE SYSTEM 21-MAR-08 3CM9 TITLE Solution Structure of Human SIgA2 COMPND MOL_ID: 3; COMPND 2 MOLECULE: Ig alpha-2 chain C region; COMPND 3 CHAIN: L, M, N, O; EXPDTA SOLUTION SCATTERING DBREF 3CM9 M 1 214 PDB 3CM9 3CM9 1 214 SEQRES 1 M 107 GLU LEU VAL MET THR GLN SER PRO SER SER LEU SER ALA SEQRES 2 M 107 SER VAL GLY ASP ARG VAL ASN ILE ALA CYS ARG ALA SER SEQRES 3 M 107 GLN GLY ILE SER SER ALA LEU ALA TRP TYR GLN GLN LYS SEQRES 4 M 107 PRO GLY LYS ALA PRO ARG LEU LEU ILE TYR ASP ALA SER SEQRES 5 M 107 ASN LEU GLU SER GLY VAL PRO SER ARG PHE SER GLY SER SEQRES 6 M 107 GLY SER GLY THR ASP PHE THR LEU THR ILE SER SER LEU SEQRES 7 M 107 GLN PRO GLU ASP PHE ALA ILE TYR TYR CYS GLN GLN PHE SEQRES 8 M 107 ASN SER TYR PRO LEU THR PHE GLY GLY GLY THR LYS VAL SEQRES 9 M 107 GLU ILE LYS ATOM 1 CA GLU M 1 -14.961 154.588 -14.366 0.00 0.00 ATOM 2 CA LEU M 2 -16.028 154.932 -10.729 0.00 0.00 ATOM 3 CA VAL M 3 -13.050 154.962 -8.346 0.00 0.00 ATOM 4 CA MET M 4 -13.130 152.882 -5.152 0.00 0.00 ATOM 5 CA THR M 5 -10.614 153.801 -2.437 0.00 0.00 ATOM 6 CA GLN M 6 -10.118 151.598 0.640 0.00 0.00 ATOM 7 CA SER M 7 -8.138 152.371 3.813 0.00 0.00 ATOM 8 CA PRO M 8 -5.840 151.635 5.492 0.00 0.00 ATOM 9 CA SER M 9 -3.306 149.862 3.264 0.00 0.00 ATOM 10 CA SER M 10 -2.339 147.423 6.027 0.00 0.00 ATOM 11 CA LEU M 11 -3.819 146.327 9.373 0.00 0.00 ATOM 12 CA SER M 12 -2.133 145.022 12.519 0.00 0.00 ATOM 13 CA ALA M 13 -4.171 143.590 15.414 0.00 0.00 ATOM 14 CA SER M 14 -4.130 140.739 17.942 0.00 0.00 ATOM 15 CA VAL M 15 -6.800 138.034 18.265 0.00 0.00 ATOM 16 CA GLY M 16 -9.979 139.582 19.648 0.00 0.00 ATOM 17 CA ASP M 17 -9.736 143.207 18.504 0.00 0.00 ATOM 18 CA ARG M 18 -12.494 144.714 16.353 0.00 0.00 ATOM 19 CA VAL M 19 -11.070 145.987 13.044 0.00 0.00 ATOM 20 CA ASN M 20 -12.741 148.555 10.767 0.00 0.00 ATOM 21 CA ILE M 21 -12.278 148.539 6.970 0.00 0.00 ATOM 22 CA ALA M 22 -13.600 151.466 4.898 0.00 0.00 ATOM 23 CA CYS M 23 -14.648 151.567 1.222 0.00 0.00 ATOM 24 CA ARG M 24 -15.531 154.995 -0.199 0.00 0.00 ATOM 25 CA ALA M 25 -16.695 155.765 -3.750 0.00 0.00 ATOM 26 CA SER M 26 -16.449 158.697 -6.179 0.00 0.00 ATOM 27 CA GLN M 27 -20.241 159.115 -6.268 0.00 0.00 ATOM 28 CA GLY M 28 -23.353 157.592 -4.688 0.00 0.00 ATOM 29 CA ILE M 29 -24.050 153.973 -5.635 0.00 0.00 ATOM 30 CA SER M 30 -26.875 153.337 -3.140 0.00 0.00 ATOM 31 CA SER M 31 -26.806 149.822 -1.629 0.00 0.00 ATOM 32 CA ALA M 32 -24.642 148.247 -4.364 0.00 0.00 ATOM 33 CA LEU M 33 -21.422 146.903 -2.789 0.00 0.00 ATOM 34 CA ALA M 34 -19.866 143.473 -2.173 0.00 0.00 ATOM 35 CA TRP M 35 -17.050 142.385 0.161 0.00 0.00 ATOM 36 CA TYR M 36 -14.574 139.585 -0.569 0.00 0.00 ATOM 37 CA GLN M 37 -11.999 137.353 1.133 0.00 0.00 ATOM 38 CA GLN M 38 -8.900 136.289 -0.786 0.00 0.00 ATOM 39 CA LYS M 39 -6.606 133.868 1.035 0.00 0.00 ATOM 40 CA PRO M 40 -3.127 134.264 -0.549 0.00 0.00 ATOM 41 CA GLY M 41 -2.885 131.823 -3.444 0.00 0.00 ATOM 42 CA LYS M 42 -6.645 131.274 -3.741 0.00 0.00 ATOM 43 CA ALA M 43 -9.751 132.613 -5.476 0.00 0.00 ATOM 44 CA PRO M 44 -11.866 135.336 -3.774 0.00 0.00 ATOM 45 CA ARG M 45 -14.814 134.396 -1.556 0.00 0.00 ATOM 46 CA LEU M 46 -18.069 136.345 -1.273 0.00 0.00 ATOM 47 CA LEU M 47 -18.766 137.559 2.264 0.00 0.00 ATOM 48 CA ILE M 48 -21.423 140.282 2.080 0.00 0.00 ATOM 49 CA TYR M 49 -23.830 141.386 -0.660 0.00 0.00 ATOM 50 CA ASP M 50 -26.362 144.236 -0.979 0.00 0.00 ATOM 51 CA ALA M 51 -24.387 146.126 1.705 0.00 0.00 ATOM 52 CA SER M 52 -25.372 144.228 4.875 0.00 0.00 ATOM 53 CA ASN M 53 -26.725 140.770 3.952 0.00 0.00 ATOM 54 CA LEU M 54 -24.472 137.803 4.773 0.00 0.00 ATOM 55 CA GLU M 55 -24.015 134.673 2.645 0.00 0.00 ATOM 56 CA SER M 56 -24.979 131.192 3.887 0.00 0.00 ATOM 57 CA GLY M 57 -21.919 129.726 5.582 0.00 0.00 ATOM 58 CA VAL M 58 -20.050 132.941 6.363 0.00 0.00 ATOM 59 CA PRO M 59 -19.468 133.318 10.147 0.00 0.00 ATOM 60 CA SER M 60 -21.832 135.405 12.277 0.00 0.00 ATOM 61 CA ARG M 61 -18.970 137.724 13.283 0.00 0.00 ATOM 62 CA PHE M 62 -18.732 139.353 9.838 0.00 0.00 ATOM 63 CA SER M 63 -21.012 142.314 9.007 0.00 0.00 ATOM 64 CA GLY M 64 -21.192 145.972 7.961 0.00 0.00 ATOM 65 CA SER M 65 -23.350 148.867 6.737 0.00 0.00 ATOM 66 CA GLY M 66 -23.328 152.204 4.898 0.00 0.00 ATOM 67 CA SER M 67 -25.600 154.049 2.452 0.00 0.00 ATOM 68 CA GLY M 68 -24.331 155.917 -0.601 0.00 0.00 ATOM 69 CA THR M 69 -20.708 156.996 -0.217 0.00 0.00 ATOM 70 CA ASP M 70 -19.222 155.800 3.093 0.00 0.00 ATOM 71 CA PHE M 71 -19.036 152.023 3.684 0.00 0.00 ATOM 72 CA THR M 72 -17.497 149.819 6.399 0.00 0.00 ATOM 73 CA LEU M 73 -16.542 146.169 7.046 0.00 0.00 ATOM 74 CA THR M 74 -16.490 145.003 10.675 0.00 0.00 ATOM 75 CA ILE M 75 -15.217 141.919 12.564 0.00 0.00 ATOM 76 CA SER M 76 -16.210 141.648 16.252 0.00 0.00 ATOM 77 CA SER M 77 -13.755 138.840 17.103 0.00 0.00 ATOM 78 CA LEU M 78 -10.565 138.546 15.051 0.00 0.00 ATOM 79 CA GLN M 79 -9.345 134.958 14.648 0.00 0.00 ATOM 80 CA PRO M 80 -6.136 133.565 13.077 0.00 0.00 ATOM 81 CA GLU M 81 -8.129 132.110 10.173 0.00 0.00 ATOM 82 CA ASP M 82 -8.985 135.620 8.912 0.00 0.00 ATOM 83 CA PHE M 83 -5.642 136.201 7.145 0.00 0.00 ATOM 84 CA ALA M 84 -6.729 137.493 3.724 0.00 0.00 ATOM 85 CA ILE M 85 -6.730 140.570 1.485 0.00 0.00 ATOM 86 CA TYR M 86 -10.275 141.971 1.432 0.00 0.00 ATOM 87 CA TYR M 87 -11.847 143.826 -1.509 0.00 0.00 ATOM 88 CA CYS M 88 -15.023 145.812 -2.253 0.00 0.00 ATOM 89 CA GLN M 89 -16.529 146.276 -5.715 0.00 0.00 ATOM 90 CA GLN M 90 -19.623 148.123 -6.949 0.00 0.00 ATOM 91 CA PHE M 91 -22.483 147.082 -9.236 0.00 0.00 ATOM 92 CA ASN M 92 -24.564 150.120 -10.223 0.00 0.00 ATOM 93 CA SER M 93 -22.947 150.970 -13.576 0.00 0.00 ATOM 94 CA TYR M 94 -20.221 149.816 -15.982 0.00 0.00 ATOM 95 CA PRO M 95 -17.490 148.850 -15.822 0.00 0.00 ATOM 96 CA LEU M 96 -17.486 147.103 -12.438 0.00 0.00 ATOM 97 CA THR M 97 -14.488 148.201 -10.350 0.00 0.00 ATOM 98 CA PHE M 98 -12.661 146.768 -7.315 0.00 0.00 ATOM 99 CA GLY M 99 -11.037 148.256 -4.220 0.00 0.00 ATOM 100 CA GLY M 100 -7.327 148.646 -3.526 0.00 0.00 ATOM 101 CA GLY M 101 -7.243 145.786 -1.037 0.00 0.00 ATOM 102 CA THR M 102 -6.738 145.854 2.730 0.00 0.00 ATOM 103 CA LYS M 103 -4.399 143.133 4.018 0.00 0.00 ATOM 104 CA VAL M 104 -4.973 141.844 7.560 0.00 0.00 ATOM 105 CA GLU M 105 -1.865 140.751 9.470 0.00 0.00 ATOM 106 CA ILE M 106 -2.397 138.880 12.759 0.00 0.00 ATOM 107 CA LYS M 107 -0.549 139.673 16.007 0.00 0.00 TER