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 C 1 475 UNP P01876 IGHA1_HUMAN 1 475 SEQRES 1 C 108 ALA SER PRO THR SER PRO LYS VAL PHE PRO LEU SER LEU SEQRES 2 C 108 CYS SER THR GLN PRO ASP GLY ASN VAL VAL ILE ALA CYS SEQRES 3 C 108 LEU VAL GLN GLY PHE PHE PRO GLN GLU PRO LEU SER VAL SEQRES 4 C 108 THR TRP SER GLU SER GLY GLN GLY VAL THR ALA ARG ASN SEQRES 5 C 108 PHE PRO PRO SER GLN ASP ALA SER GLY ASP LEU TYR THR SEQRES 6 C 108 THR SER SER GLN LEU THR LEU PRO ALA THR GLN CYS LEU SEQRES 7 C 108 ALA GLY LYS SER VAL THR CYS HIS VAL LYS HIS TYR THR SEQRES 8 C 108 ASN PRO SER GLN ASP VAL THR VAL PRO CYS PRO VAL PRO SEQRES 9 C 108 SER THR PRO PRO ATOM 1 CA ALA C 123 -111.043-119.893 -61.690 0.00 0.00 ATOM 2 CA SER C 124 -111.244-123.325 -60.135 0.00 0.00 ATOM 3 CA PRO C 125 -109.361-124.428 -56.939 0.00 0.00 ATOM 4 CA THR C 126 -106.708-127.136 -57.704 0.00 0.00 ATOM 5 CA SER C 127 -104.550-129.072 -55.149 0.00 0.00 ATOM 6 CA PRO C 128 -100.713-129.299 -55.697 0.00 0.00 ATOM 7 CA LYS C 129 -99.071-132.436 -57.156 0.00 0.00 ATOM 8 CA VAL C 130 -95.749-132.963 -55.339 0.00 0.00 ATOM 9 CA PHE C 131 -92.774-134.395 -57.318 0.00 0.00 ATOM 10 CA PRO C 132 -89.257-135.379 -56.118 0.00 0.00 ATOM 11 CA LEU C 133 -86.155-133.501 -57.333 0.00 0.00 ATOM 12 CA SER C 134 -83.173-135.895 -56.841 0.00 0.00 ATOM 13 CA LEU C 135 -79.909-136.825 -58.684 0.00 0.00 ATOM 14 CA CYS C 136 -78.183-140.264 -58.859 0.00 0.00 ATOM 15 CA SER C 137 -74.424-139.499 -59.543 0.00 0.00 ATOM 16 CA THR C 138 -75.292-136.238 -61.473 0.00 0.00 ATOM 17 CA GLN C 139 -74.532-133.859 -58.487 0.00 0.00 ATOM 18 CA PRO C 140 -70.901-132.812 -57.558 0.00 0.00 ATOM 19 CA ASP C 141 -68.946-135.117 -55.104 0.00 0.00 ATOM 20 CA GLY C 142 -69.239-133.455 -51.612 0.00 0.00 ATOM 21 CA ASN C 143 -72.638-131.678 -51.163 0.00 0.00 ATOM 22 CA VAL C 144 -76.203-132.918 -51.953 0.00 0.00 ATOM 23 CA VAL C 145 -79.172-130.847 -53.313 0.00 0.00 ATOM 24 CA ILE C 146 -82.614-132.509 -53.143 0.00 0.00 ATOM 25 CA ALA C 147 -85.988-130.822 -53.542 0.00 0.00 ATOM 26 CA CYS C 148 -89.790-131.060 -53.899 0.00 0.00 ATOM 27 CA LEU C 149 -91.588-129.476 -56.887 0.00 0.00 ATOM 28 CA VAL C 150 -95.088-128.368 -55.595 0.00 0.00 ATOM 29 CA GLN C 151 -96.864-128.156 -58.970 0.00 0.00 ATOM 30 CA GLY C 152 -100.143-126.901 -60.506 0.00 0.00 ATOM 31 CA PHE C 153 -102.113-125.411 -57.604 0.00 0.00 ATOM 32 CA PHE C 154 -104.668-122.563 -57.270 0.00 0.00 ATOM 33 CA PRO C 155 -105.111-120.318 -55.439 0.00 0.00 ATOM 34 CA GLN C 156 -101.628-119.352 -53.994 0.00 0.00 ATOM 35 CA GLU C 157 -102.580-119.509 -50.207 0.00 0.00 ATOM 36 CA PRO C 158 -100.014-120.143 -47.346 0.00 0.00 ATOM 37 CA LEU C 159 -97.797-123.138 -48.246 0.00 0.00 ATOM 38 CA SER C 160 -96.023-124.666 -45.171 0.00 0.00 ATOM 39 CA VAL C 161 -92.987-126.727 -46.346 0.00 0.00 ATOM 40 CA THR C 162 -90.980-128.582 -43.678 0.00 0.00 ATOM 41 CA TRP C 163 -88.134-131.157 -44.228 0.00 0.00 ATOM 42 CA SER C 164 -87.422-134.254 -41.970 0.00 0.00 ATOM 43 CA GLU C 165 -83.683-133.336 -41.489 0.00 0.00 ATOM 44 CA SER C 166 -82.535-130.067 -39.738 0.00 0.00 ATOM 45 CA GLY C 167 -79.013-128.928 -38.622 0.00 0.00 ATOM 46 CA GLN C 168 -76.084-126.414 -38.818 0.00 0.00 ATOM 47 CA GLY C 169 -74.959-127.110 -42.453 0.00 0.00 ATOM 48 CA VAL C 170 -78.436-128.189 -43.795 0.00 0.00 ATOM 49 CA THR C 171 -79.984-125.161 -45.637 0.00 0.00 ATOM 50 CA ALA C 172 -83.681-125.014 -46.685 0.00 0.00 ATOM 51 CA ARG C 173 -84.708-122.605 -49.499 0.00 0.00 ATOM 52 CA ASN C 174 -88.468-122.104 -50.076 0.00 0.00 ATOM 53 CA PHE C 175 -88.878-120.433 -53.545 0.00 0.00 ATOM 54 CA PRO C 176 -91.931-118.010 -53.745 0.00 0.00 ATOM 55 CA PRO C 177 -94.966-119.075 -55.930 0.00 0.00 ATOM 56 CA SER C 178 -94.569-118.392 -59.694 0.00 0.00 ATOM 57 CA GLN C 179 -97.758-118.030 -61.800 0.00 0.00 ATOM 58 CA ASP C 180 -98.185-119.770 -65.252 0.00 0.00 ATOM 59 CA ALA C 181 -99.977-117.502 -67.882 0.00 0.00 ATOM 60 CA SER C 182 -103.197-115.535 -66.900 0.00 0.00 ATOM 61 CA GLY C 183 -103.902-116.928 -63.368 0.00 0.00 ATOM 62 CA ASP C 184 -104.064-120.582 -64.668 0.00 0.00 ATOM 63 CA LEU C 185 -101.759-122.509 -62.212 0.00 0.00 ATOM 64 CA TYR C 186 -99.104-121.647 -59.531 0.00 0.00 ATOM 65 CA THR C 187 -95.838-123.675 -59.026 0.00 0.00 ATOM 66 CA THR C 188 -93.316-123.429 -56.085 0.00 0.00 ATOM 67 CA SER C 189 -90.107-125.445 -55.425 0.00 0.00 ATOM 68 CA SER C 190 -88.644-126.248 -51.925 0.00 0.00 ATOM 69 CA GLN C 191 -84.877-127.110 -51.929 0.00 0.00 ATOM 70 CA LEU C 192 -82.769-128.811 -49.168 0.00 0.00 ATOM 71 CA THR C 193 -78.938-128.367 -49.544 0.00 0.00 ATOM 72 CA LEU C 194 -76.957-130.643 -47.076 0.00 0.00 ATOM 73 CA PRO C 195 -73.449-132.326 -46.906 0.00 0.00 ATOM 74 CA ALA C 196 -73.108-135.721 -48.774 0.00 0.00 ATOM 75 CA THR C 197 -72.035-137.410 -45.444 0.00 0.00 ATOM 76 CA GLN C 198 -75.488-136.325 -44.014 0.00 0.00 ATOM 77 CA CYS C 199 -77.421-137.638 -47.119 0.00 0.00 ATOM 78 CA LEU C 200 -75.842-141.034 -48.106 0.00 0.00 ATOM 79 CA ALA C 201 -76.891-143.239 -51.139 0.00 0.00 ATOM 80 CA GLY C 202 -79.925-145.504 -50.349 0.00 0.00 ATOM 81 CA LYS C 203 -81.250-143.077 -47.638 0.00 0.00 ATOM 82 CA SER C 204 -84.153-140.539 -48.005 0.00 0.00 ATOM 83 CA VAL C 205 -85.370-137.165 -46.534 0.00 0.00 ATOM 84 CA THR C 206 -89.146-136.479 -46.181 0.00 0.00 ATOM 85 CA CYS C 207 -90.658-133.184 -47.434 0.00 0.00 ATOM 86 CA HIS C 208 -93.949-132.249 -45.625 0.00 0.00 ATOM 87 CA VAL C 209 -96.199-129.837 -47.614 0.00 0.00 ATOM 88 CA LYS C 210 -99.290-128.162 -46.072 0.00 0.00 ATOM 89 CA HIS C 211 -101.462-126.145 -48.533 0.00 0.00 ATOM 90 CA TYR C 212 -103.958-123.898 -46.418 0.00 0.00 ATOM 91 CA THR C 213 -105.981-125.852 -43.785 0.00 0.00 ATOM 92 CA ASN C 214 -105.837-129.050 -45.936 0.00 0.00 ATOM 93 CA PRO C 215 -104.170-132.329 -44.670 0.00 0.00 ATOM 94 CA SER C 216 -100.326-132.582 -44.976 0.00 0.00 ATOM 95 CA GLN C 217 -98.971-134.119 -48.240 0.00 0.00 ATOM 96 CA ASP C 218 -95.719-136.050 -47.574 0.00 0.00 ATOM 97 CA VAL C 219 -93.046-137.191 -50.105 0.00 0.00 ATOM 98 CA THR C 220 -89.971-139.327 -49.352 0.00 0.00 ATOM 99 CA VAL C 221 -87.153-137.795 -51.513 0.00 0.00 ATOM 100 CA PRO C 222 -83.953-139.936 -52.158 0.00 0.00 ATOM 101 CA CYS C 223 -82.670-139.649 -53.579 0.00 0.00 ATOM 102 CA PRO C 224 -81.386-139.361 -55.000 1.00 0.00 ATOM 103 CA VAL C 225 -78.912-137.360 -55.076 1.00 0.00 ATOM 104 CA PRO C 226 -77.306-134.465 -52.782 1.00 0.00 ATOM 105 CA SER C 227 -74.569-133.764 -55.676 1.00 0.00 ATOM 106 CA THR C 228 -73.135-130.357 -57.045 1.00 0.00 ATOM 107 CA PRO C 229 -69.392-130.852 -58.185 1.00 0.00 ATOM 108 CA PRO C 230 -67.454-128.444 -60.770 1.00 0.00 TER