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 108 ALA SER PRO THR SER PRO LYS VAL PHE PRO LEU SER LEU SEQRES 2 D 108 CYS SER THR GLN PRO ASP GLY ASN VAL VAL ILE ALA CYS SEQRES 3 D 108 LEU VAL GLN GLY PHE PHE PRO GLN GLU PRO LEU SER VAL SEQRES 4 D 108 THR TRP SER GLU SER GLY GLN GLY VAL THR ALA ARG ASN SEQRES 5 D 108 PHE PRO PRO SER GLN ASP ALA SER GLY ASP LEU TYR THR SEQRES 6 D 108 THR SER SER GLN LEU THR LEU PRO ALA THR GLN CYS LEU SEQRES 7 D 108 ALA GLY LYS SER VAL THR CYS HIS VAL LYS HIS TYR THR SEQRES 8 D 108 ASN PRO SER GLN ASP VAL THR VAL PRO CYS PRO VAL PRO SEQRES 9 D 108 SER THR PRO PRO ATOM 1 CA ALA D 123 -7.349-151.148-113.592 0.00 0.00 ATOM 2 CA SER D 124 -8.515-149.810-116.921 0.00 0.00 ATOM 3 CA PRO D 125 -8.354-146.099-118.004 0.00 0.00 ATOM 4 CA THR D 126 -11.884-144.578-118.431 0.00 0.00 ATOM 5 CA SER D 127 -12.761-141.060-119.768 0.00 0.00 ATOM 6 CA PRO D 128 -15.216-138.826-117.757 0.00 0.00 ATOM 7 CA LYS D 129 -18.890-138.454-118.770 0.00 0.00 ATOM 8 CA VAL D 130 -19.909-134.822-118.148 0.00 0.00 ATOM 9 CA PHE D 131 -23.500-134.092-116.970 0.00 0.00 ATOM 10 CA PRO D 132 -25.263-130.731-116.363 0.00 0.00 ATOM 11 CA LEU D 133 -26.391-129.692-112.860 0.00 0.00 ATOM 12 CA SER D 134 -29.173-127.067-113.349 0.00 0.00 ATOM 13 CA LEU D 135 -32.519-126.090-111.686 0.00 0.00 ATOM 14 CA CYS D 136 -35.688-124.700-113.376 0.00 0.00 ATOM 15 CA SER D 137 -37.558-122.716-110.587 0.00 0.00 ATOM 16 CA THR D 138 -36.157-125.035-107.801 0.00 0.00 ATOM 17 CA GLN D 139 -33.335-122.589-106.704 0.00 0.00 ATOM 18 CA PRO D 140 -34.031-119.550-104.375 0.00 0.00 ATOM 19 CA ASP D 141 -35.093-116.206-106.065 0.00 0.00 ATOM 20 CA GLY D 142 -31.883-114.037-106.254 0.00 0.00 ATOM 21 CA ASN D 143 -28.734-116.202-106.808 0.00 0.00 ATOM 22 CA VAL D 144 -28.114-119.074-109.304 0.00 0.00 ATOM 23 CA VAL D 145 -26.043-122.289-108.731 0.00 0.00 ATOM 24 CA ILE D 146 -25.200-124.340-111.849 0.00 0.00 ATOM 25 CA ALA D 147 -22.610-127.094-112.144 0.00 0.00 ATOM 26 CA CYS D 148 -20.984-129.914-114.152 0.00 0.00 ATOM 27 CA LEU D 149 -20.767-133.467-112.737 0.00 0.00 ATOM 28 CA VAL D 150 -17.501-135.020-114.176 0.00 0.00 ATOM 29 CA GLN D 151 -18.383-138.699-113.657 0.00 0.00 ATOM 30 CA GLY D 152 -16.766-142.171-113.805 0.00 0.00 ATOM 31 CA PHE D 153 -13.132-141.552-114.769 0.00 0.00 ATOM 32 CA PHE D 154 -9.811-143.334-114.022 0.00 0.00 ATOM 33 CA PRO D 155 -7.111-142.531-113.214 0.00 0.00 ATOM 34 CA GLN D 156 -7.485-139.211-111.219 0.00 0.00 ATOM 35 CA GLU D 157 -4.910-137.093-113.257 0.00 0.00 ATOM 36 CA PRO D 158 -5.003-133.205-113.500 0.00 0.00 ATOM 37 CA LEU D 159 -8.566-132.050-114.320 0.00 0.00 ATOM 38 CA SER D 160 -8.684-128.457-115.740 0.00 0.00 ATOM 39 CA VAL D 161 -12.242-127.040-115.316 0.00 0.00 ATOM 40 CA THR D 162 -12.924-123.550-116.712 0.00 0.00 ATOM 41 CA TRP D 163 -16.347-121.756-117.018 0.00 0.00 ATOM 42 CA SER D 164 -17.375-119.320-119.883 0.00 0.00 ATOM 43 CA GLU D 165 -18.465-116.520-117.429 0.00 0.00 ATOM 44 CA SER D 166 -15.993-114.796-114.983 0.00 0.00 ATOM 45 CA GLY D 167 -16.468-111.705-112.709 0.00 0.00 ATOM 46 CA GLN D 168 -16.519-110.108-109.191 0.00 0.00 ATOM 47 CA GLY D 169 -19.635-111.912-107.774 0.00 0.00 ATOM 48 CA VAL D 170 -19.276-115.145-109.892 0.00 0.00 ATOM 49 CA THR D 171 -17.619-117.838-107.668 0.00 0.00 ATOM 50 CA ALA D 172 -16.203-121.128-109.068 0.00 0.00 ATOM 51 CA ARG D 173 -15.766-124.111-106.684 0.00 0.00 ATOM 52 CA ASN D 174 -13.823-127.139-108.023 0.00 0.00 ATOM 53 CA PHE D 175 -14.550-130.104-105.641 0.00 0.00 ATOM 54 CA PRO D 176 -11.544-132.568-105.277 0.00 0.00 ATOM 55 CA PRO D 177 -11.893-136.112-106.838 0.00 0.00 ATOM 56 CA SER D 178 -13.832-138.645-104.690 0.00 0.00 ATOM 57 CA GLN D 179 -13.155-142.379-105.262 0.00 0.00 ATOM 58 CA ASP D 180 -16.015-145.003-105.520 0.00 0.00 ATOM 59 CA ALA D 181 -15.162-148.357-103.710 0.00 0.00 ATOM 60 CA SER D 182 -11.680-150.032-104.227 0.00 0.00 ATOM 61 CA GLY D 183 -10.161-147.808-106.996 0.00 0.00 ATOM 62 CA ASP D 184 -13.130-148.495-109.399 0.00 0.00 ATOM 63 CA LEU D 185 -14.135-144.951-110.617 0.00 0.00 ATOM 64 CA TYR D 186 -13.431-141.284-109.594 0.00 0.00 ATOM 65 CA THR D 187 -16.122-138.493-109.659 0.00 0.00 ATOM 66 CA THR D 188 -15.588-134.667-109.277 0.00 0.00 ATOM 67 CA SER D 189 -18.153-131.801-109.422 0.00 0.00 ATOM 68 CA SER D 190 -17.409-128.186-110.603 0.00 0.00 ATOM 69 CA GLN D 191 -19.918-125.540-109.321 0.00 0.00 ATOM 70 CA LEU D 192 -20.501-121.929-110.582 0.00 0.00 ATOM 71 CA THR D 193 -22.434-119.642-108.122 0.00 0.00 ATOM 72 CA LEU D 194 -23.483-116.275-109.781 0.00 0.00 ATOM 73 CA PRO D 195 -26.274-113.596-109.331 0.00 0.00 ATOM 74 CA ALA D 196 -29.666-114.381-111.063 0.00 0.00 ATOM 75 CA THR D 197 -29.376-111.061-113.062 0.00 0.00 ATOM 76 CA GLN D 198 -26.071-112.480-114.548 0.00 0.00 ATOM 77 CA CYS D 199 -27.679-115.918-115.386 0.00 0.00 ATOM 78 CA LEU D 200 -31.211-115.222-116.811 0.00 0.00 ATOM 79 CA ALA D 201 -33.800-117.915-117.906 0.00 0.00 ATOM 80 CA GLY D 202 -33.194-119.177-121.510 0.00 0.00 ATOM 81 CA LYS D 203 -29.415-118.353-121.348 0.00 0.00 ATOM 82 CA SER D 204 -26.512-120.850-120.758 0.00 0.00 ATOM 83 CA VAL D 205 -22.904-120.947-119.343 0.00 0.00 ATOM 84 CA THR D 206 -20.301-123.329-120.898 0.00 0.00 ATOM 85 CA CYS D 207 -18.154-125.598-118.670 0.00 0.00 ATOM 86 CA HIS D 208 -14.812-126.615-120.331 0.00 0.00 ATOM 87 CA VAL D 209 -13.261-129.833-118.887 0.00 0.00 ATOM 88 CA LYS D 210 -9.707-130.983-119.775 0.00 0.00 ATOM 89 CA HIS D 211 -8.717-134.451-118.417 0.00 0.00 ATOM 90 CA TYR D 212 -4.784-134.836-118.773 0.00 0.00 ATOM 91 CA THR D 213 -3.450-134.104-122.312 0.00 0.00 ATOM 92 CA ASN D 214 -6.780-135.247-123.886 0.00 0.00 ATOM 93 CA PRO D 215 -8.991-132.865-126.027 0.00 0.00 ATOM 94 CA SER D 216 -11.326-130.447-124.122 0.00 0.00 ATOM 95 CA GLN D 217 -14.878-131.741-123.376 0.00 0.00 ATOM 96 CA ASP D 218 -17.410-128.853-123.433 0.00 0.00 ATOM 97 CA VAL D 219 -20.976-128.757-121.977 0.00 0.00 ATOM 98 CA THR D 220 -23.493-125.907-122.319 0.00 0.00 ATOM 99 CA VAL D 221 -25.344-125.827-118.936 0.00 0.00 ATOM 100 CA PRO D 222 -28.714-123.904-118.641 0.00 0.00 ATOM 101 CA CYS D 223 -30.018-124.090-117.208 0.00 0.00 ATOM 102 CA PRO D 224 -31.321-124.275-115.801 1.00 0.00 ATOM 103 CA VAL D 225 -31.387-122.848-112.956 1.00 0.00 ATOM 104 CA PRO D 226 -29.073-120.385-110.766 1.00 0.00 ATOM 105 CA SER D 227 -31.720-120.692-107.723 1.00 0.00 ATOM 106 CA THR D 228 -31.102-121.054-103.846 1.00 0.00 ATOM 107 CA PRO D 229 -34.015-119.281-101.865 1.00 0.00 ATOM 108 CA PRO D 230 -34.992-120.081 -98.038 1.00 0.00 TER