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 O 1 214 PDB 2QTJ 2QTJ 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 21.096-138.814 -97.216 1.00 44.73 ATOM 2 CA LEU O 2 20.889-135.767 -94.967 1.00 35.54 ATOM 3 CA VAL O 3 17.531-135.781 -93.253 1.00 31.56 ATOM 4 CA MET O 4 15.509-132.537 -93.038 1.00 22.17 ATOM 5 CA THR O 5 12.881-132.524 -90.284 1.00 21.72 ATOM 6 CA GLN O 6 10.306-129.726 -89.961 1.00 21.28 ATOM 7 CA SER O 7 8.477-128.717 -86.856 1.00 26.91 ATOM 8 CA PRO O 8 5.469-128.530 -86.574 1.00 23.87 ATOM 9 CA SER O 9 3.503-130.466 -89.159 1.00 25.30 ATOM 10 CA SER O 10 0.462-128.132 -88.833 1.00 19.86 ATOM 11 CA LEU O 11 -0.338-124.769 -87.270 1.00 23.29 ATOM 12 CA SER O 12 -3.502-122.649 -87.253 1.00 23.31 ATOM 13 CA ALA O 13 -3.020-118.976 -86.393 1.00 17.57 ATOM 14 CA SER O 14 -5.045-115.779 -86.809 1.00 22.73 ATOM 15 CA VAL O 15 -4.135-113.078 -89.290 1.00 28.57 ATOM 16 CA GLY O 16 -1.662-110.650 -87.749 1.00 21.03 ATOM 17 CA ASP O 17 -0.004-113.425 -85.750 1.00 22.77 ATOM 18 CA ARG O 18 3.684-114.110 -86.058 1.00 23.60 ATOM 19 CA VAL O 19 4.465-117.738 -86.970 1.00 23.83 ATOM 20 CA ASN O 20 7.850-119.540 -86.836 1.00 23.16 ATOM 21 CA ILE O 21 8.483-122.964 -88.570 1.00 17.54 ATOM 22 CA ALA O 22 11.685-124.861 -87.691 1.00 16.62 ATOM 23 CA CYS O 23 13.730-127.193 -89.891 1.00 18.46 ATOM 24 CA ARG O 24 16.634-129.355 -88.622 1.00 25.96 ATOM 25 CA ALA O 25 19.392-130.779 -90.724 1.00 23.98 ATOM 26 CA SER O 26 20.630-134.178 -89.346 1.00 26.04 ATOM 27 CA GLN O 27 24.128-132.621 -89.753 1.00 30.74 ATOM 28 CA GLY O 28 25.684-129.254 -90.665 1.00 22.50 ATOM 29 CA ILE O 29 24.753-127.671 -94.007 1.00 23.00 ATOM 30 CA SER O 30 26.183-124.165 -93.426 1.00 28.25 ATOM 31 CA SER O 31 23.650-121.853 -95.157 1.00 24.99 ATOM 32 CA ALA O 32 22.514-124.153 -97.948 1.00 18.53 ATOM 33 CA LEU O 33 18.871-124.088 -97.171 1.00 14.34 ATOM 34 CA ALA O 34 16.004-122.844 -99.363 1.00 12.12 ATOM 35 CA TRP O 35 12.277-122.480 -98.249 1.00 11.73 ATOM 36 CA TYR O 36 9.288-123.058-100.632 1.00 12.91 ATOM 37 CA GLN O 37 5.633-122.189-100.428 1.00 14.01 ATOM 38 CA GLN O 38 3.180-124.581-102.138 1.00 17.89 ATOM 39 CA LYS O 39 -0.475-123.626-102.411 1.00 28.11 ATOM 40 CA PRO O 40 -2.508-126.800-102.653 1.00 48.58 ATOM 41 CA GLY O 41 -2.458-128.059-106.228 1.00 50.05 ATOM 42 CA LYS O 42 0.326-125.916-107.572 1.00 36.39 ATOM 43 CA ALA O 43 3.927-125.935-108.274 1.00 25.74 ATOM 44 CA PRO O 44 6.117-124.980-105.276 1.00 19.57 ATOM 45 CA ARG O 45 7.481-121.366-105.141 1.00 18.49 ATOM 46 CA LEU O 46 10.834-120.116-103.876 1.00 16.21 ATOM 47 CA LEU O 47 10.689-117.685-100.944 1.00 12.87 ATOM 48 CA ILE O 48 14.149-117.813 -99.405 1.00 14.65 ATOM 49 CA TYR O 49 17.552-119.214-100.571 1.00 17.16 ATOM 50 CA ASP O 50 20.913-119.367 -98.667 1.00 18.89 ATOM 51 CA ALA O 51 18.938-119.517 -95.345 1.00 18.17 ATOM 52 CA SER O 52 18.142-115.817 -95.328 1.00 20.97 ATOM 53 CA ASN O 53 18.003-114.198 -98.828 1.00 19.22 ATOM 54 CA LEU O 54 14.445-113.320-100.032 1.00 19.53 ATOM 55 CA GLU O 55 13.816-114.099-103.643 1.00 17.43 ATOM 56 CA SER O 56 12.805-110.997-105.721 1.00 20.00 ATOM 57 CA GLY O 57 9.042-110.197-105.481 1.00 20.01 ATOM 58 CA VAL O 58 8.444-112.164-102.168 1.00 21.23 ATOM 59 CA PRO O 59 6.706-110.007 -99.506 1.00 16.07 ATOM 60 CA SER O 60 8.907-108.431 -96.876 1.00 22.82 ATOM 61 CA ARG O 61 6.926-110.258 -94.088 1.00 21.29 ATOM 62 CA PHE O 62 8.805-113.497 -94.875 1.00 17.51 ATOM 63 CA SER O 63 12.270-113.858 -93.267 1.00 19.32 ATOM 64 CA GLY O 64 14.581-116.840 -92.584 1.00 20.78 ATOM 65 CA SER O 65 17.440-117.503 -90.168 1.00 23.83 ATOM 66 CA GLY O 66 19.839-120.251 -89.056 1.00 21.33 ATOM 67 CA SER O 67 23.183-121.710 -89.923 1.00 24.78 ATOM 68 CA GLY O 68 24.661-125.137 -89.374 1.00 20.79 ATOM 69 CA THR O 69 21.804-127.363 -88.389 1.00 21.84 ATOM 70 CA ASP O 70 18.781-125.265 -87.205 1.00 22.29 ATOM 71 CA PHE O 71 16.837-122.932 -89.490 1.00 18.92 ATOM 72 CA THR O 72 13.647-120.803 -88.901 1.00 16.74 ATOM 73 CA LEU O 73 11.206-119.267 -91.372 1.00 17.41 ATOM 74 CA THR O 74 9.151-116.404 -89.756 1.00 18.15 ATOM 75 CA ILE O 75 5.967-114.910 -91.265 1.00 18.09 ATOM 76 CA SER O 76 5.687-111.723 -89.243 1.00 26.38 ATOM 77 CA SER O 77 2.000-110.834 -89.848 1.00 21.00 ATOM 78 CA LEU O 78 0.092-113.822 -91.194 1.00 18.63 ATOM 79 CA GLN O 79 -2.272-112.926 -94.021 1.00 18.79 ATOM 80 CA PRO O 80 -5.176-115.203 -95.596 1.00 20.11 ATOM 81 CA GLU O 81 -3.180-115.675 -98.749 1.00 20.56 ATOM 82 CA ASP O 82 -0.446-117.339 -96.675 1.00 17.09 ATOM 83 CA PHE O 83 -2.422-120.615 -96.415 1.00 19.73 ATOM 84 CA ALA O 84 -0.024-123.180 -97.891 1.00 14.48 ATOM 85 CA ILE O 85 2.348-126.076 -97.115 1.00 18.56 ATOM 86 CA TYR O 86 5.904-124.770 -96.506 1.00 15.43 ATOM 87 CA TYR O 87 9.081-126.958 -97.266 1.00 12.46 ATOM 88 CA CYS O 88 12.744-126.580 -96.542 1.00 17.01 ATOM 89 CA GLN O 89 15.305-128.211 -98.836 1.00 17.53 ATOM 90 CA GLN O 90 19.132-128.644 -98.333 1.00 15.70 ATOM 91 CA PHE O 91 21.631-128.362-101.224 1.00 19.77 ATOM 92 CA ASN O 92 24.842-128.969 -99.380 1.00 24.81 ATOM 93 CA SER O 93 24.947-132.663-100.310 1.00 25.13 ATOM 94 CA TYR O 94 23.543-135.014-102.937 1.00 27.26 ATOM 95 CA PRO O 95 20.765-136.444-102.795 1.00 22.87 ATOM 96 CA LEU O 96 19.201-133.054-102.375 1.00 17.90 ATOM 97 CA THR O 97 16.482-133.533 -99.732 1.00 20.34 ATOM 98 CA PHE O 98 13.255-131.882 -98.599 1.00 20.06 ATOM 99 CA GLY O 99 11.659-131.656 -95.246 1.00 18.84 ATOM 100 CA GLY O 100 8.200-133.104 -94.616 1.00 20.40 ATOM 101 CA GLY O 101 6.071-129.875 -94.710 1.00 17.69 ATOM 102 CA THR O 102 4.330-127.521 -92.320 1.00 17.17 ATOM 103 CA LYS O 103 0.710-126.846 -93.328 1.00 19.91 ATOM 104 CA VAL O 104 -0.430-123.406 -92.160 1.00 19.16 ATOM 105 CA GLU O 105 -4.246-122.967 -91.911 1.00 24.03 ATOM 106 CA ILE O 106 -5.840-119.542 -91.053 1.00 24.32 ATOM 107 CA LYS O 107 -8.073-119.156 -87.908 1.00 25.43 TER