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 O 1 214 PDB 3CM9 3CM9 1 214 SEQRES 1 O 107 GLU LEU VAL MET THR GLN SER PRO SER SER LEU SER ALA SEQRES 2 O 107 SER VAL GLY ASP ARG VAL ASN ILE ALA CYS ARG ALA SER SEQRES 3 O 107 GLN GLY ILE SER SER ALA LEU ALA TRP TYR GLN GLN LYS SEQRES 4 O 107 PRO GLY LYS ALA PRO ARG LEU LEU ILE TYR ASP ALA SER SEQRES 5 O 107 ASN LEU GLU SER GLY VAL PRO SER ARG PHE SER GLY SER SEQRES 6 O 107 GLY SER GLY THR ASP PHE THR LEU THR ILE SER SER LEU SEQRES 7 O 107 GLN PRO GLU ASP PHE ALA ILE TYR TYR CYS GLN GLN PHE SEQRES 8 O 107 ASN SER TYR PRO LEU THR PHE GLY GLY GLY THR LYS VAL SEQRES 9 O 107 GLU ILE LYS ATOM 1 CA GLU O 1 75.357 156.565-137.658 0.00 0.00 ATOM 2 CA LEU O 2 74.552 155.339-141.171 0.00 0.00 ATOM 3 CA VAL O 3 71.595 152.931-141.217 0.00 0.00 ATOM 4 CA MET O 4 71.771 149.718-143.263 0.00 0.00 ATOM 5 CA THR O 5 68.461 147.989-144.038 0.00 0.00 ATOM 6 CA GLN O 6 68.357 144.517-145.623 0.00 0.00 ATOM 7 CA SER O 7 65.341 142.650-147.039 0.00 0.00 ATOM 8 CA PRO O 8 63.590 140.303-146.785 0.00 0.00 ATOM 9 CA SER O 9 63.747 139.133-143.162 0.00 0.00 ATOM 10 CA SER O 10 63.578 135.461-144.169 0.00 0.00 ATOM 11 CA LEU O 11 64.058 133.468-147.390 0.00 0.00 ATOM 12 CA SER O 12 62.545 130.165-148.508 0.00 0.00 ATOM 13 CA ALA O 13 63.788 128.376-151.645 0.00 0.00 ATOM 14 CA SER O 14 64.602 124.885-152.938 0.00 0.00 ATOM 15 CA VAL O 15 68.014 123.735-154.200 0.00 0.00 ATOM 16 CA GLY O 16 68.752 125.436-157.514 0.00 0.00 ATOM 17 CA ASP O 17 66.753 128.671-157.283 0.00 0.00 ATOM 18 CA ARG O 18 68.520 132.028-157.617 0.00 0.00 ATOM 19 CA VAL O 19 67.954 134.160-154.497 0.00 0.00 ATOM 20 CA ASN O 20 68.356 137.950-154.314 0.00 0.00 ATOM 21 CA ILE O 21 69.434 139.748-151.116 0.00 0.00 ATOM 22 CA ALA O 22 69.295 143.563-150.959 0.00 0.00 ATOM 23 CA CYS O 23 71.305 145.985-148.787 0.00 0.00 ATOM 24 CA ARG O 24 70.312 149.663-148.976 0.00 0.00 ATOM 25 CA ALA O 25 71.942 152.569-147.116 0.00 0.00 ATOM 26 CA SER O 26 70.843 155.954-145.745 0.00 0.00 ATOM 27 CA GLN O 27 73.247 157.819-148.048 0.00 0.00 ATOM 28 CA GLY O 28 75.771 157.076-150.799 0.00 0.00 ATOM 29 CA ILE O 29 78.846 155.124-149.699 0.00 0.00 ATOM 30 CA SER O 30 80.286 154.455-153.175 0.00 0.00 ATOM 31 CA SER O 31 81.865 150.986-153.525 0.00 0.00 ATOM 32 CA ALA O 32 82.342 150.378-149.778 0.00 0.00 ATOM 33 CA LEU O 33 80.365 147.262-148.758 0.00 0.00 ATOM 34 CA ALA O 34 81.188 143.739-147.543 0.00 0.00 ATOM 35 CA TRP O 35 79.055 140.578-147.406 0.00 0.00 ATOM 36 CA TYR O 36 79.342 137.870-144.744 0.00 0.00 ATOM 37 CA GLN O 37 78.315 134.275-144.015 0.00 0.00 ATOM 38 CA GLN O 38 77.529 133.252-140.444 0.00 0.00 ATOM 39 CA LYS O 39 76.773 129.564-139.933 0.00 0.00 ATOM 40 CA PRO O 40 74.694 129.314-136.710 0.00 0.00 ATOM 41 CA GLY O 41 77.101 128.898-133.806 0.00 0.00 ATOM 42 CA LYS O 42 80.158 130.131-135.719 0.00 0.00 ATOM 43 CA ALA O 43 82.118 133.282-136.546 0.00 0.00 ATOM 44 CA PRO O 44 81.272 135.278-139.723 0.00 0.00 ATOM 45 CA ARG O 45 83.087 134.575-142.993 0.00 0.00 ATOM 46 CA LEU O 46 84.033 137.184-145.595 0.00 0.00 ATOM 47 CA LEU O 47 82.468 136.519-148.998 0.00 0.00 ATOM 48 CA ILE O 48 82.690 139.720-151.050 0.00 0.00 ATOM 49 CA TYR O 49 84.678 142.943-150.634 0.00 0.00 ATOM 50 CA ASP O 50 84.783 146.262-152.536 0.00 0.00 ATOM 51 CA ALA O 51 81.258 145.493-153.824 0.00 0.00 ATOM 52 CA SER O 52 81.959 142.791-156.436 0.00 0.00 ATOM 53 CA ASN O 53 85.380 141.207-155.784 0.00 0.00 ATOM 54 CA LEU O 54 85.356 137.649-154.409 0.00 0.00 ATOM 55 CA GLU O 55 87.760 136.225-151.815 0.00 0.00 ATOM 56 CA SER O 56 90.133 133.334-152.588 0.00 0.00 ATOM 57 CA GLY O 57 88.298 130.127-151.730 0.00 0.00 ATOM 58 CA VAL O 58 84.722 131.398-151.909 0.00 0.00 ATOM 59 CA PRO O 59 82.698 129.465-154.549 0.00 0.00 ATOM 60 CA SER O 60 82.264 130.857-158.064 0.00 0.00 ATOM 61 CA ARG O 61 78.472 130.941-157.624 0.00 0.00 ATOM 62 CA PHE O 62 78.558 133.883-155.190 0.00 0.00 ATOM 63 CA SER O 63 78.607 137.452-156.570 0.00 0.00 ATOM 64 CA GLY O 64 76.847 140.828-156.676 0.00 0.00 ATOM 65 CA SER O 65 76.997 144.506-157.666 0.00 0.00 ATOM 66 CA GLY O 66 75.585 147.976-156.970 0.00 0.00 ATOM 67 CA SER O 67 76.912 151.551-156.862 0.00 0.00 ATOM 68 CA GLY O 68 75.991 154.057-154.161 0.00 0.00 ATOM 69 CA THR O 69 72.670 153.233-152.514 0.00 0.00 ATOM 70 CA ASP O 70 71.167 150.005-153.902 0.00 0.00 ATOM 71 CA PHE O 71 73.164 146.775-153.418 0.00 0.00 ATOM 72 CA THR O 72 72.470 143.081-154.096 0.00 0.00 ATOM 73 CA LEU O 73 73.834 139.614-153.219 0.00 0.00 ATOM 74 CA THR O 74 73.192 136.809-155.722 0.00 0.00 ATOM 75 CA ILE O 75 73.531 132.991-155.732 0.00 0.00 ATOM 76 CA SER O 76 73.036 131.245-159.104 0.00 0.00 ATOM 77 CA SER O 77 72.764 127.709-157.667 0.00 0.00 ATOM 78 CA LEU O 78 71.485 127.300-154.107 0.00 0.00 ATOM 79 CA GLN O 79 73.011 124.326-152.278 0.00 0.00 ATOM 80 CA PRO O 80 72.224 122.828-148.837 0.00 0.00 ATOM 81 CA GLU O 81 75.573 124.046-147.485 0.00 0.00 ATOM 82 CA ASP O 82 74.452 127.691-147.800 0.00 0.00 ATOM 83 CA PHE O 83 72.420 127.731-144.559 0.00 0.00 ATOM 84 CA ALA O 84 73.625 130.932-142.867 0.00 0.00 ATOM 85 CA ILE O 85 72.537 134.424-141.820 0.00 0.00 ATOM 86 CA TYR O 86 74.146 136.914-144.218 0.00 0.00 ATOM 87 CA TYR O 87 75.164 140.476-143.310 0.00 0.00 ATOM 88 CA CYS O 88 76.407 143.622-145.081 0.00 0.00 ATOM 89 CA GLN O 89 78.432 146.386-143.429 0.00 0.00 ATOM 90 CA GLN O 90 79.885 149.652-144.747 0.00 0.00 ATOM 91 CA PHE O 91 83.352 151.201-144.481 0.00 0.00 ATOM 92 CA ASN O 92 83.272 154.832-145.640 0.00 0.00 ATOM 93 CA SER O 93 82.852 156.592-142.276 0.00 0.00 ATOM 94 CA TYR O 94 82.557 155.905-138.536 0.00 0.00 ATOM 95 CA PRO O 95 81.203 154.010-136.805 0.00 0.00 ATOM 96 CA LEU O 96 81.046 150.917-139.020 0.00 0.00 ATOM 97 CA THR O 97 77.520 149.459-139.062 0.00 0.00 ATOM 98 CA PHE O 98 76.030 146.063-139.982 0.00 0.00 ATOM 99 CA GLY O 99 72.847 144.915-141.708 0.00 0.00 ATOM 100 CA GLY O 100 69.778 143.375-140.097 0.00 0.00 ATOM 101 CA GLY O 101 70.582 139.880-141.333 0.00 0.00 ATOM 102 CA THR O 102 68.809 137.754-143.938 0.00 0.00 ATOM 103 CA LYS O 103 68.402 134.103-142.926 0.00 0.00 ATOM 104 CA VAL O 104 68.304 131.499-145.710 0.00 0.00 ATOM 105 CA GLU O 105 66.126 128.441-145.069 0.00 0.00 ATOM 106 CA ILE O 106 66.450 125.516-147.507 0.00 0.00 ATOM 107 CA LYS O 107 63.488 123.677-149.065 0.00 0.00 TER