HEADER IMMUNE SYSTEM 02-AUG-07 2QTJ TITLE Solution structure of human dimeric immunoglobulin A COMPND MOL_ID: 2; COMPND 2 MOLECULE: Ig alpha-1 chain C region; COMPND 3 CHAIN: A, B, C, D; EXPDTA SOLUTION SCATTERING DBREF 2QTJ D 1 475 UNP P01876 IGHA1_HUMAN 1 475 SEQRES 1 D 122 GLN VAL LYS LEU LEU GLU GLN SER GLY ALA GLU VAL LYS SEQRES 2 D 122 LYS PRO GLY ALA SER VAL LYS VAL SER CYS LYS ALA SER SEQRES 3 D 122 GLY TYR SER PHE THR SER TYR GLY LEU HIS TRP VAL ARG SEQRES 4 D 122 GLN ALA PRO GLY GLN ARG LEU GLU TRP MET GLY TRP ILE SEQRES 5 D 122 SER ALA GLY THR GLY ASN THR LYS TYR SER GLN LYS PHE SEQRES 6 D 122 ARG GLY ARG VAL THR PHE THR ARG ASP THR SER ALA THR SEQRES 7 D 122 THR ALA TYR MET GLY LEU SER SER LEU ARG PRO GLU ASP SEQRES 8 D 122 THR ALA VAL TYR TYR CYS ALA ARG ASP PRO TYR GLY GLY SEQRES 9 D 122 GLY LYS SER GLU PHE ASP TYR TRP GLY GLN GLY THR LEU SEQRES 10 D 122 VAL THR VAL SER SER ATOM 1 CA GLN D 1 6.368-116.463-122.182 0.00 0.00 ATOM 2 CA VAL D 2 3.781-119.152-123.082 0.00 0.00 ATOM 3 CA LYS D 3 4.835-120.039-119.550 0.00 0.00 ATOM 4 CA LEU D 4 8.657-120.011-118.844 0.00 0.00 ATOM 5 CA LEU D 5 9.212-123.731-118.140 0.00 0.00 ATOM 6 CA GLU D 6 6.248-125.797-119.554 0.00 0.00 ATOM 7 CA GLN D 7 5.654-129.543-119.315 0.00 0.00 ATOM 8 CA SER D 8 3.916-132.297-121.360 0.00 0.00 ATOM 9 CA GLY D 9 0.531-133.307-119.816 0.00 0.00 ATOM 10 CA ALA D 10 -0.480-136.501-118.059 0.00 0.00 ATOM 11 CA GLU D 11 -0.344-139.825-118.432 0.00 0.00 ATOM 12 CA VAL D 12 -1.441-143.275-117.543 0.00 0.00 ATOM 13 CA LYS D 13 1.095-146.035-118.090 0.00 0.00 ATOM 14 CA LYS D 14 0.754-149.770-117.368 0.00 0.00 ATOM 15 CA PRO D 15 3.112-151.238-114.639 0.00 0.00 ATOM 16 CA GLY D 16 6.362-152.343-116.405 0.00 0.00 ATOM 17 CA ALA D 17 6.131-149.631-119.118 0.00 0.00 ATOM 18 CA SER D 18 8.258-146.480-119.516 0.00 0.00 ATOM 19 CA VAL D 19 7.146-142.808-119.457 0.00 0.00 ATOM 20 CA LYS D 20 8.868-139.823-121.127 0.00 0.00 ATOM 21 CA VAL D 21 8.134-136.376-119.649 0.00 0.00 ATOM 22 CA SER D 22 9.266-133.188-121.485 0.00 0.00 ATOM 23 CA CYS D 23 10.011-129.675-120.251 0.00 0.00 ATOM 24 CA LYS D 24 10.213-126.830-122.844 0.00 0.00 ATOM 25 CA ALA D 25 12.120-123.673-121.720 0.00 0.00 ATOM 26 CA SER D 26 10.904-120.318-123.228 0.00 0.00 ATOM 27 CA GLY D 27 12.075-116.674-122.628 0.00 0.00 ATOM 28 CA TYR D 28 15.582-117.314-121.153 0.00 0.00 ATOM 29 CA SER D 29 18.850-118.671-122.718 0.00 0.00 ATOM 30 CA PHE D 30 18.333-122.490-122.407 0.00 0.00 ATOM 31 CA THR D 31 22.065-123.556-122.494 0.00 0.00 ATOM 32 CA SER D 32 23.128-121.119-119.669 0.00 0.00 ATOM 33 CA TYR D 33 21.307-123.069-116.854 0.00 0.00 ATOM 34 CA GLY D 34 20.802-126.610-115.571 0.00 0.00 ATOM 35 CA LEU D 35 17.366-128.230-115.048 0.00 0.00 ATOM 36 CA HIS D 36 16.486-130.315-111.979 0.00 0.00 ATOM 37 CA TRP D 37 13.777-133.086-111.945 0.00 0.00 ATOM 38 CA VAL D 38 11.679-133.547-108.766 0.00 0.00 ATOM 39 CA ARG D 39 8.606-135.683-108.008 0.00 0.00 ATOM 40 CA GLN D 40 5.798-135.597-105.426 0.00 0.00 ATOM 41 CA ALA D 41 3.879-138.841-104.733 0.00 0.00 ATOM 42 CA PRO D 42 0.351-138.326-103.226 0.00 0.00 ATOM 43 CA GLY D 43 0.518-137.100 -99.581 0.00 0.00 ATOM 44 CA GLN D 44 4.325-137.232 -99.627 0.00 0.00 ATOM 45 CA ARG D 45 7.280-134.861 -99.598 0.00 0.00 ATOM 46 CA LEU D 46 9.097-133.733-102.748 0.00 0.00 ATOM 47 CA GLU D 47 11.856-136.130-103.853 0.00 0.00 ATOM 48 CA TRP D 48 14.831-134.984-105.952 0.00 0.00 ATOM 49 CA MET D 49 15.490-137.390-108.923 0.00 0.00 ATOM 50 CA GLY D 50 18.276-135.784-111.003 0.00 0.00 ATOM 51 CA TRP D 51 19.735-132.799-112.897 0.00 0.00 ATOM 52 CA ILE D 52 20.927-132.085-116.480 0.00 0.00 ATOM 53 CA SER D 53 23.257-129.270-117.677 0.00 0.00 ATOM 54 CA ALA D 54 21.559-127.859-120.875 0.00 0.00 ATOM 55 CA GLY D 55 24.985-126.677-122.209 0.00 0.00 ATOM 56 CA THR D 56 27.082-129.923-121.879 0.00 0.00 ATOM 57 CA GLY D 57 24.304-132.600-121.622 0.00 0.00 ATOM 58 CA ASN D 58 25.982-133.863-118.366 0.00 0.00 ATOM 59 CA THR D 59 23.919-135.733-115.894 0.00 0.00 ATOM 60 CA LYS D 60 23.586-136.260-112.139 0.00 0.00 ATOM 61 CA TYR D 61 20.971-138.425-110.449 0.00 0.00 ATOM 62 CA SER D 62 19.643-139.911-107.219 0.00 0.00 ATOM 63 CA GLN D 63 20.888-143.504-106.713 0.00 0.00 ATOM 64 CA LYS D 64 17.283-144.379-105.628 0.00 0.00 ATOM 65 CA PHE D 65 16.597-144.353-109.463 0.00 0.00 ATOM 66 CA ARG D 66 19.914-146.133-110.393 0.00 0.00 ATOM 67 CA GLY D 67 19.541-148.035-113.680 0.00 0.00 ATOM 68 CA ARG D 68 15.992-146.782-114.583 0.00 0.00 ATOM 69 CA VAL D 69 16.130-142.944-115.050 0.00 0.00 ATOM 70 CA THR D 70 17.541-141.134-118.180 0.00 0.00 ATOM 71 CA PHE D 71 17.947-137.327-118.786 0.00 0.00 ATOM 72 CA THR D 72 18.228-135.857-122.308 0.00 0.00 ATOM 73 CA ARG D 73 18.099-132.303-123.766 0.00 0.00 ATOM 74 CA ASP D 74 17.263-131.234-127.345 0.00 0.00 ATOM 75 CA THR D 75 19.283-128.005-127.410 0.00 0.00 ATOM 76 CA SER D 76 17.728-126.793-130.769 0.00 0.00 ATOM 77 CA ALA D 77 14.052-127.335-129.638 0.00 0.00 ATOM 78 CA THR D 78 15.068-126.009-126.173 0.00 0.00 ATOM 79 CA THR D 79 13.413-128.985-124.416 0.00 0.00 ATOM 80 CA ALA D 80 14.743-131.330-121.705 0.00 0.00 ATOM 81 CA TYR D 81 13.274-134.824-121.091 0.00 0.00 ATOM 82 CA MET D 82 13.305-137.385-118.331 0.00 0.00 ATOM 83 CA GLY D 83 12.733-141.060-119.181 0.00 0.00 ATOM 84 CA LEU D 84 11.555-143.352-116.319 0.00 0.00 ATOM 85 CA SER D 85 11.618-147.126-117.070 0.00 0.00 ATOM 86 CA SER D 86 10.147-150.224-115.327 0.00 0.00 ATOM 87 CA LEU D 87 7.167-148.320-113.906 0.00 0.00 ATOM 88 CA ARG D 88 5.754-149.548-110.583 0.00 0.00 ATOM 89 CA PRO D 89 2.408-148.370-109.005 0.00 0.00 ATOM 90 CA GLU D 90 4.446-146.230-106.479 0.00 0.00 ATOM 91 CA ASP D 91 5.760-144.081-109.406 0.00 0.00 ATOM 92 CA THR D 92 2.231-142.482-109.492 0.00 0.00 ATOM 93 CA ALA D 93 3.287-138.894-108.726 0.00 0.00 ATOM 94 CA VAL D 94 3.501-135.348-110.128 0.00 0.00 ATOM 95 CA TYR D 95 6.841-134.892-112.003 0.00 0.00 ATOM 96 CA TYR D 96 8.235-131.348-112.013 0.00 0.00 ATOM 97 CA CYS D 97 11.189-129.919-113.847 0.00 0.00 ATOM 98 CA ALA D 98 12.688-126.874-112.048 0.00 0.00 ATOM 99 CA ARG D 99 15.506-124.485-112.967 0.00 0.00 ATOM 100 CA ASP D 100 19.030-124.395-111.453 0.00 0.00 ATOM 101 CA PRO D 101 19.777-120.567-111.430 0.00 0.00 ATOM 102 CA TYR D 102 23.589-121.142-111.664 0.00 0.00 ATOM 103 CA GLY D 103 24.188-124.230-113.931 0.00 0.00 ATOM 104 CA GLY D 104 26.285-126.140-111.296 0.00 0.00 ATOM 105 CA GLY D 105 23.864-128.909-110.113 0.00 0.00 ATOM 106 CA LYS D 106 23.535-128.040-106.402 0.00 0.00 ATOM 107 CA SER D 107 21.137-125.143-105.916 0.00 0.00 ATOM 108 CA GLU D 108 17.737-123.904-104.767 0.00 0.00 ATOM 109 CA PHE D 109 15.228-123.993-107.722 0.00 0.00 ATOM 110 CA ASP D 110 13.939-120.522-108.828 0.00 0.00 ATOM 111 CA TYR D 111 11.432-121.462-111.661 0.00 0.00 ATOM 112 CA TRP D 112 9.284-124.590-111.633 0.00 0.00 ATOM 113 CA GLY D 113 7.360-126.238-114.455 0.00 0.00 ATOM 114 CA GLN D 114 3.643-126.938-113.747 0.00 0.00 ATOM 115 CA GLY D 115 3.909-130.719-113.162 0.00 0.00 ATOM 116 CA THR D 116 2.757-133.782-115.136 0.00 0.00 ATOM 117 CA LEU D 117 0.879-136.447-113.244 0.00 0.00 ATOM 118 CA VAL D 118 1.934-139.947-114.351 0.00 0.00 ATOM 119 CA THR D 119 -0.464-142.584-113.054 0.00 0.00 ATOM 120 CA VAL D 120 0.768-146.208-113.169 0.00 0.00 ATOM 121 CA SER D 121 -2.265-148.576-113.583 0.00 0.00 ATOM 122 CA SER D 122 -3.866-151.668-115.244 0.00 0.00 TER