0.031646 0.016692 0.016910 0.000000 0.033982 0.008369 0.000000 0.000000 0.026275 0.00000 0.00000 0.00000 Prota, A.E. Sage, D.R. Stehle, T. Fingeroth, J.D. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 1 91.51 111.44 117.81 31.6 33.27 42.11 C3 H7 N O2 89.093 y ALANINE L-peptide linking C6 H15 N4 O2 1 175.209 y ARGININE L-peptide linking C4 H8 N2 O3 132.118 y ASPARAGINE L-peptide linking C4 H7 N O4 133.103 y ASPARTIC ACID L-peptide linking C3 H7 N O2 S 121.158 y CYSTEINE L-peptide linking C5 H10 N2 O3 146.144 y GLUTAMINE L-peptide linking C5 H9 N O4 147.129 y GLUTAMIC ACID L-peptide linking C2 H5 N O2 75.067 y GLYCINE peptide linking C6 H10 N3 O2 1 156.162 y HISTIDINE L-peptide linking H2 O 18.015 WATER non-polymer C6 H13 N O2 131.173 y ISOLEUCINE L-peptide linking C6 H13 N O2 131.173 y LEUCINE L-peptide linking C6 H15 N2 O2 1 147.195 y LYSINE L-peptide linking C5 H11 N O2 S 149.211 y METHIONINE L-peptide linking C8 H15 N O6 221.208 2-acetamido-2-deoxy-beta-D-glucopyranose N-acetyl-beta-D-glucosamine; 2-acetamido-2-deoxy-beta-D-glucose; 2-acetamido-2-deoxy-D-glucose; 2-acetamido-2-deoxy-glucose; N-ACETYL-D-GLUCOSAMINE D-saccharide, beta linking C9 H11 N O2 165.189 y PHENYLALANINE L-peptide linking C5 H9 N O2 115.130 y PROLINE L-peptide linking C3 H7 N O3 105.093 y SERINE L-peptide linking C4 H9 N O3 119.119 y THREONINE L-peptide linking C11 H12 N2 O2 204.225 y TRYPTOPHAN L-peptide linking C9 H11 N O3 181.189 y TYROSINE L-peptide linking C5 H11 N O2 117.146 y VALINE L-peptide linking N 1 N N N 2 S C N 3 N C N 4 N O N 5 N C N 6 N O N 7 N H N 8 N H N 9 N H N 10 N H N 11 N H N 12 N H N 13 N H N 14 N N N 15 S C N 16 N C N 17 N O N 18 N C N 19 N C N 20 N C N 21 N N N 22 N C N 23 N N N 24 N N N 25 N O N 26 N H N 27 N H N 28 N H N 29 N H N 30 N H N 31 N H N 32 N H N 33 N H N 34 N H N 35 N H N 36 N H N 37 N H N 38 N H N 39 N H N 40 N H N 41 N N N 42 S C N 43 N C N 44 N O N 45 N C N 46 N C N 47 N O N 48 N N N 49 N O N 50 N H N 51 N H N 52 N H N 53 N H N 54 N H N 55 N H N 56 N H N 57 N H N 58 N N N 59 S C N 60 N C N 61 N O N 62 N C N 63 N C N 64 N O N 65 N O N 66 N O N 67 N H N 68 N H N 69 N H N 70 N H N 71 N H N 72 N H N 73 N H N 74 N N N 75 R C N 76 N C N 77 N O N 78 N C N 79 N S N 80 N O N 81 N H N 82 N H N 83 N H N 84 N H N 85 N H N 86 N H N 87 N H N 88 N N N 89 S C N 90 N C N 91 N O N 92 N C N 93 N C N 94 N C N 95 N O N 96 N N N 97 N O N 98 N H N 99 N H N 100 N H N 101 N H N 102 N H N 103 N H N 104 N H N 105 N H N 106 N H N 107 N H N 108 N N N 109 S C N 110 N C N 111 N O N 112 N C N 113 N C N 114 N C N 115 N O N 116 N O N 117 N O N 118 N H N 119 N H N 120 N H N 121 N H N 122 N H N 123 N H N 124 N H N 125 N H N 126 N H N 127 N N N 128 N C N 129 N C N 130 N O N 131 N O N 132 N H N 133 N H N 134 N H N 135 N H N 136 N H N 137 N N N 138 S C N 139 N C N 140 N O N 141 N C Y 142 N C Y 143 N N Y 144 N C Y 145 N C Y 146 N N N 147 N O N 148 N H N 149 N H N 150 N H N 151 N H N 152 N H N 153 N H N 154 N H N 155 N H N 156 N H N 157 N H N 158 N O N 159 N H N 160 N H N 161 N N N 162 S C N 163 N C N 164 N O N 165 S C N 166 N C N 167 N C N 168 N C N 169 N O N 170 N H N 171 N H N 172 N H N 173 N H N 174 N H N 175 N H N 176 N H N 177 N H N 178 N H N 179 N H N 180 N H N 181 N H N 182 N H N 183 N N N 184 S C N 185 N C N 186 N O N 187 N C N 188 N C N 189 N C N 190 N C N 191 N O N 192 N H N 193 N H N 194 N H N 195 N H N 196 N H N 197 N H N 198 N H N 199 N H N 200 N H N 201 N H N 202 N H N 203 N H N 204 N H N 205 N N N 206 S C N 207 N C N 208 N O N 209 N C N 210 N C N 211 N C N 212 N C N 213 N N N 214 N O N 215 N H N 216 N H N 217 N H N 218 N H N 219 N H N 220 N H N 221 N H N 222 N H N 223 N H N 224 N H N 225 N H N 226 N H N 227 N H N 228 N H N 229 N H N 230 N N N 231 S C N 232 N C N 233 N O N 234 N C N 235 N C N 236 N S N 237 N C N 238 N O N 239 N H N 240 N H N 241 N H N 242 N H N 243 N H N 244 N H N 245 N H N 246 N H N 247 N H N 248 N H N 249 N H N 250 R C N 251 R C N 252 R C N 253 S C N 254 R C N 255 N C N 256 N C N 257 N C N 258 N N N 259 N O N 260 N O N 261 N O N 262 N O N 263 N O N 264 N O N 265 N H N 266 N H N 267 N H N 268 N H N 269 N H N 270 N H N 271 N H N 272 N H N 273 N H N 274 N H N 275 N H N 276 N H N 277 N H N 278 N H N 279 N H N 280 N N N 281 S C N 282 N C N 283 N O N 284 N C Y 285 N C Y 286 N C Y 287 N C Y 288 N C Y 289 N C Y 290 N C N 291 N O N 292 N H N 293 N H N 294 N H N 295 N H N 296 N H N 297 N H N 298 N H N 299 N H N 300 N H N 301 N H N 302 N H N 303 N N N 304 S C N 305 N C N 306 N O N 307 N C N 308 N C N 309 N C N 310 N O N 311 N H N 312 N H N 313 N H N 314 N H N 315 N H N 316 N H N 317 N H N 318 N H N 319 N H N 320 N N N 321 S C N 322 N C N 323 N O N 324 N C N 325 N O N 326 N O N 327 N H N 328 N H N 329 N H N 330 N H N 331 N H N 332 N H N 333 N H N 334 N N N 335 S C N 336 N C N 337 N O N 338 R C N 339 N O N 340 N C N 341 N O N 342 N H N 343 N H N 344 N H N 345 N H N 346 N H N 347 N H N 348 N H N 349 N H N 350 N H N 351 N N N 352 S C N 353 N C N 354 N O N 355 N C Y 356 N C Y 357 N C Y 358 N C Y 359 N N Y 360 N C Y 361 N C Y 362 N C Y 363 N C Y 364 N C N 365 N O N 366 N H N 367 N H N 368 N H N 369 N H N 370 N H N 371 N H N 372 N H N 373 N H N 374 N H N 375 N H N 376 N H N 377 N H N 378 N N N 379 S C N 380 N C N 381 N O N 382 N C Y 383 N C Y 384 N C Y 385 N C Y 386 N C Y 387 N C Y 388 N C N 389 N O N 390 N O N 391 N H N 392 N H N 393 N H N 394 N H N 395 N H N 396 N H N 397 N H N 398 N H N 399 N H N 400 N H N 401 N H N 402 N N N 403 S C N 404 N C N 405 N O N 406 N C N 407 N C N 408 N C N 409 N O N 410 N H N 411 N H N 412 N H N 413 N H N 414 N H N 415 N H N 416 N H N 417 N H N 418 N H N 419 N H N 420 N H N 1 N sing N 2 N sing N 3 N sing N 4 N sing N 5 N sing N 6 N sing N 7 N doub N 8 N sing N 9 N sing N 10 N sing N 11 N sing N 12 N sing N 13 N sing N 14 N sing N 15 N sing N 16 N sing N 17 N sing N 18 N sing N 19 N doub N 20 N sing N 21 N sing N 22 N sing N 23 N sing N 24 N sing N 25 N sing N 26 N sing N 27 N sing N 28 N sing N 29 N sing N 30 N sing N 31 N sing N 32 N sing N 33 N doub N 34 N sing N 35 N sing N 36 N sing N 37 N sing N 38 N sing N 39 N sing N 40 N sing N 41 N sing N 42 N sing N 43 N sing N 44 N sing N 45 N doub N 46 N sing N 47 N sing N 48 N sing N 49 N sing N 50 N doub N 51 N sing N 52 N sing N 53 N sing N 54 N sing N 55 N sing N 56 N sing N 57 N sing N 58 N sing N 59 N sing N 60 N sing N 61 N doub N 62 N sing N 63 N sing N 64 N sing N 65 N sing N 66 N doub N 67 N sing N 68 N sing N 69 N sing N 70 N sing N 71 N sing N 72 N sing N 73 N sing N 74 N sing N 75 N sing N 76 N doub N 77 N sing N 78 N sing N 79 N sing N 80 N sing N 81 N sing N 82 N sing N 83 N sing N 84 N sing N 85 N sing N 86 N sing N 87 N sing N 88 N sing N 89 N doub N 90 N sing N 91 N sing N 92 N sing N 93 N sing N 94 N sing N 95 N sing N 96 N sing N 97 N doub N 98 N sing N 99 N sing N 100 N sing N 101 N sing N 102 N sing N 103 N sing N 104 N sing N 105 N sing N 106 N sing N 107 N sing N 108 N doub N 109 N sing N 110 N sing N 111 N sing N 112 N sing N 113 N sing N 114 N sing N 115 N sing N 116 N doub N 117 N sing N 118 N sing N 119 N sing N 120 N sing N 121 N sing N 122 N sing N 123 N sing N 124 N sing N 125 N sing N 126 N doub N 127 N sing N 128 N sing N 129 N sing N 130 N sing N 131 N sing N 132 N sing N 133 N sing N 134 N sing N 135 N doub N 136 N sing N 137 N sing N 138 N sing N 139 N sing Y 140 N sing Y 141 N doub Y 142 N doub N 143 N sing Y 144 N sing N 145 N sing Y 146 N sing N 147 N sing N 148 N sing N 149 N sing N 150 N sing N 151 N sing N 152 N sing N 153 N sing N 154 N sing N 155 N sing N 156 N sing N 157 N sing N 158 N doub N 159 N sing N 160 N sing N 161 N sing N 162 N sing N 163 N sing N 164 N sing N 165 N sing N 166 N sing N 167 N sing N 168 N sing N 169 N sing N 170 N sing N 171 N sing N 172 N sing N 173 N sing N 174 N sing N 175 N sing N 176 N sing N 177 N sing N 178 N sing N 179 N doub N 180 N sing N 181 N sing N 182 N sing N 183 N sing N 184 N sing N 185 N sing N 186 N sing N 187 N sing N 188 N sing N 189 N sing N 190 N sing N 191 N sing N 192 N sing N 193 N sing N 194 N sing N 195 N sing N 196 N sing N 197 N sing N 198 N sing N 199 N sing N 200 N doub N 201 N sing N 202 N sing N 203 N sing N 204 N sing N 205 N sing N 206 N sing N 207 N sing N 208 N sing N 209 N sing N 210 N sing N 211 N sing N 212 N sing N 213 N sing N 214 N sing N 215 N sing N 216 N sing N 217 N sing N 218 N sing N 219 N sing N 220 N sing N 221 N sing N 222 N sing N 223 N sing N 224 N doub N 225 N sing N 226 N sing N 227 N sing N 228 N sing N 229 N sing N 230 N sing N 231 N sing N 232 N sing N 233 N sing N 234 N sing N 235 N sing N 236 N sing N 237 N sing N 238 N sing N 239 N sing N 240 N sing N 241 N sing N 242 N sing N 243 N sing N 244 N sing N 245 N sing N 246 N sing N 247 N sing N 248 N sing N 249 N sing N 250 N sing N 251 N sing N 252 N sing N 253 N sing N 254 N sing N 255 N sing N 256 N sing N 257 N sing N 258 N doub N 259 N sing N 260 N sing N 261 N sing N 262 N sing N 263 N sing N 264 N sing N 265 N sing N 266 N sing N 267 N sing N 268 N sing N 269 N sing N 270 N sing N 271 N sing N 272 N sing N 273 N doub N 274 N sing N 275 N sing N 276 N sing N 277 N sing Y 278 N doub Y 279 N sing Y 280 N sing N 281 N sing Y 282 N doub N 283 N sing Y 284 N doub N 285 N sing Y 286 N sing N 287 N sing N 288 N sing N 289 N sing N 290 N sing N 291 N sing N 292 N sing N 293 N sing N 294 N sing N 295 N sing N 296 N doub N 297 N sing N 298 N sing N 299 N sing N 300 N sing N 301 N sing N 302 N sing N 303 N sing N 304 N sing N 305 N sing N 306 N sing N 307 N sing N 308 N sing N 309 N sing N 310 N sing N 311 N sing N 312 N sing N 313 N doub N 314 N sing N 315 N sing N 316 N sing N 317 N sing N 318 N sing N 319 N sing N 320 N sing N 321 N sing N 322 N sing N 323 N sing N 324 N sing N 325 N sing N 326 N doub N 327 N sing N 328 N sing N 329 N sing N 330 N sing N 331 N sing N 332 N sing N 333 N sing N 334 N sing N 335 N sing N 336 N sing N 337 N sing N 338 N sing N 339 N sing N 340 N sing N 341 N sing N 342 N doub N 343 N sing N 344 N sing N 345 N sing N 346 N sing Y 347 N doub Y 348 N sing Y 349 N sing N 350 N sing Y 351 N doub Y 352 N sing Y 353 N sing N 354 N sing Y 355 N sing Y 356 N doub N 357 N sing Y 358 N doub N 359 N sing Y 360 N sing N 361 N sing N 362 N sing N 363 N sing N 364 N sing N 365 N sing N 366 N sing N 367 N sing N 368 N sing N 369 N sing N 370 N doub N 371 N sing N 372 N sing N 373 N sing N 374 N sing Y 375 N doub Y 376 N sing Y 377 N sing N 378 N sing Y 379 N doub N 380 N sing Y 381 N doub N 382 N sing Y 383 N sing N 384 N sing N 385 N sing N 386 N sing N 387 N sing N 388 N sing N 389 N sing N 390 N sing N 391 N sing N 392 N sing N 393 N sing N 394 N doub N 395 N sing N 396 N sing N 397 N sing N 398 N sing N 399 N sing N 400 N sing N 401 N sing N 402 N sing N 403 N sing N 404 N sing N 405 N sing US Proc.Natl.Acad.Sci.USA PNASA6 0040 0027-8424 99 10641 10646 10.1073/pnas.162360499 12122212 The crystal structure of human CD21: Implications for Epstein-Barr virus and C3d binding. 2002 10.2210/pdb1ly2/pdb pdb_00001ly2 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 100 1 wiggler CCD 2001-02-01 CUSTOM-MADE wiggler SINGLE WAVELENGTH M x-ray 1 1.05 1.0 X25 NSLS 1.05 SYNCHROTRON NSLS BEAMLINE X25 14256.318 complement receptor type 2 1 man polymer 221.208 2-acetamido-2-deoxy-beta-D-glucopyranose 2 man non-polymer 18.015 water 146 nat water CD21; Epstein-Barr virus receptor no no EASCGSPPPILNGRISYYSTPIAVGTVIRYSCSGTFRLIGEKSLLCITKDKVDGTWDKPAPKCEYFNKYSSCPEPIVPGG YKIRGSTPYRHGDSVTFACKTNFSMNGNKSVWCQANNMWGPTRLPTCVSI EASCGSPPPILNGRISYYSTPIAVGTVIRYSCSGTFRLIGEKSLLCITKDKVDGTWDKPAPKCEYFNKYSSCPEPIVPGG YKIRGSTPYRHGDSVTFACKTNFSMNGNKSVWCQANNMWGPTRLPTCVSI A polypeptide(L) n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n human Homo Pichia sample CR2 9606 Homo sapiens 4922 Pichia pastoris X-33 PicZa (Invitrogen) secreted protein 2 2.48 50.41 VAPOR DIFFUSION, HANGING DROP 7.5 PEG 4000, pH 7.5, VAPOR DIFFUSION, HANGING DROP at 298K, temperature 298.0K 298.0 chem_comp entity pdbx_chem_comp_identifier pdbx_entity_nonpoly struct_conn struct_ref_seq_dif struct_site struct_site_gen chem_comp chem_comp_atom chem_comp_bond database_2 pdbx_initial_refinement_model repository Initial release Carbohydrate remediation repository Remediation Version format compliance Non-polymer description Version format compliance Data collection Database references Derived calculations Structure summary Data collection Database references Refinement description Structure summary 1 0 2002-07-05 1 1 2008-04-28 1 2 2011-07-13 1 3 2020-07-29 1 4 2024-04-03 _chem_comp.name _chem_comp.type _entity.pdbx_description _pdbx_entity_nonpoly.name _struct_conn.pdbx_leaving_atom_flag _struct_conn.pdbx_role _struct_ref_seq_dif.details _chem_comp.pdbx_synonyms _database_2.pdbx_DOI _database_2.pdbx_database_accession DGlcpNAcb N-acetyl-b-D-glucopyranosamine b-D-GlcpNAc GlcNAc RCSB Y RCSB 2002-06-06 REL REL NAG 2-acetamido-2-deoxy-beta-D-glucopyranose HOH water Crystal structure of liganded CD21 (complex with C3d) Other experimental model NAG 1001 2 NAG NAG 1001 A NAG 1002 2 NAG NAG 1002 A HOH 1 3 HOH HOH 1003 A HOH 2 3 HOH HOH 1004 A HOH 3 3 HOH HOH 1005 A HOH 4 3 HOH HOH 1006 A HOH 5 3 HOH HOH 1007 A HOH 6 3 HOH HOH 1008 A HOH 7 3 HOH HOH 1009 A HOH 8 3 HOH HOH 1010 A HOH 9 3 HOH HOH 1011 A HOH 10 3 HOH HOH 1012 A HOH 11 3 HOH HOH 1013 A HOH 12 3 HOH HOH 1014 A HOH 13 3 HOH HOH 1015 A HOH 14 3 HOH HOH 1016 A HOH 15 3 HOH HOH 1017 A HOH 16 3 HOH HOH 1018 A HOH 17 3 HOH HOH 1019 A HOH 18 3 HOH HOH 1020 A HOH 19 3 HOH HOH 1021 A HOH 20 3 HOH HOH 1022 A HOH 21 3 HOH HOH 1023 A HOH 22 3 HOH HOH 1024 A HOH 23 3 HOH HOH 1025 A HOH 24 3 HOH HOH 1026 A HOH 25 3 HOH HOH 1027 A HOH 26 3 HOH HOH 1028 A HOH 27 3 HOH HOH 1029 A HOH 28 3 HOH HOH 1030 A HOH 29 3 HOH HOH 1031 A HOH 30 3 HOH HOH 1032 A HOH 31 3 HOH HOH 1033 A HOH 32 3 HOH HOH 1034 A HOH 33 3 HOH HOH 1035 A HOH 34 3 HOH HOH 1036 A HOH 35 3 HOH HOH 1037 A HOH 36 3 HOH HOH 1038 A HOH 37 3 HOH HOH 1039 A HOH 38 3 HOH HOH 1040 A HOH 39 3 HOH HOH 1041 A HOH 40 3 HOH HOH 1042 A HOH 41 3 HOH HOH 1043 A HOH 42 3 HOH HOH 1044 A HOH 43 3 HOH HOH 1045 A HOH 44 3 HOH HOH 1046 A HOH 45 3 HOH HOH 1047 A HOH 46 3 HOH HOH 1048 A HOH 47 3 HOH HOH 1049 A HOH 48 3 HOH HOH 1050 A HOH 49 3 HOH HOH 1051 A HOH 50 3 HOH HOH 1052 A HOH 51 3 HOH HOH 1053 A HOH 52 3 HOH HOH 1054 A HOH 53 3 HOH HOH 1055 A HOH 54 3 HOH HOH 1056 A HOH 55 3 HOH HOH 1057 A HOH 56 3 HOH HOH 1058 A HOH 57 3 HOH HOH 1059 A HOH 58 3 HOH HOH 1060 A HOH 59 3 HOH HOH 1061 A HOH 60 3 HOH HOH 1062 A HOH 61 3 HOH HOH 1063 A HOH 62 3 HOH HOH 1064 A HOH 63 3 HOH HOH 1065 A HOH 64 3 HOH HOH 1066 A HOH 65 3 HOH HOH 1067 A HOH 66 3 HOH HOH 1068 A HOH 67 3 HOH HOH 1069 A HOH 68 3 HOH HOH 1070 A HOH 69 3 HOH HOH 1071 A HOH 70 3 HOH HOH 1072 A HOH 71 3 HOH HOH 1073 A HOH 72 3 HOH HOH 1074 A HOH 73 3 HOH HOH 1075 A HOH 74 3 HOH HOH 1076 A HOH 75 3 HOH HOH 1077 A HOH 76 3 HOH HOH 1078 A HOH 77 3 HOH HOH 1079 A HOH 78 3 HOH HOH 1080 A HOH 79 3 HOH HOH 1081 A HOH 80 3 HOH HOH 1082 A HOH 81 3 HOH HOH 1083 A HOH 82 3 HOH HOH 1084 A HOH 83 3 HOH HOH 1085 A HOH 84 3 HOH HOH 1086 A HOH 85 3 HOH HOH 1087 A HOH 86 3 HOH HOH 1088 A HOH 87 3 HOH HOH 1089 A HOH 88 3 HOH HOH 1090 A HOH 89 3 HOH HOH 1091 A HOH 90 3 HOH HOH 1092 A HOH 91 3 HOH HOH 1093 A HOH 92 3 HOH HOH 1094 A HOH 93 3 HOH HOH 1095 A HOH 94 3 HOH HOH 1096 A HOH 95 3 HOH HOH 1097 A HOH 96 3 HOH HOH 1098 A HOH 97 3 HOH HOH 1099 A HOH 98 3 HOH HOH 1100 A HOH 99 3 HOH HOH 1101 A HOH 100 3 HOH HOH 1102 A HOH 101 3 HOH HOH 1103 A HOH 102 3 HOH HOH 1104 A HOH 103 3 HOH HOH 1105 A HOH 104 3 HOH HOH 1106 A HOH 105 3 HOH HOH 1107 A HOH 106 3 HOH HOH 1108 A HOH 107 3 HOH HOH 1109 A HOH 109 3 HOH HOH 1110 A HOH 111 3 HOH HOH 1111 A HOH 112 3 HOH HOH 1112 A HOH 113 3 HOH HOH 1113 A HOH 114 3 HOH HOH 1114 A HOH 115 3 HOH HOH 1115 A HOH 116 3 HOH HOH 1116 A HOH 117 3 HOH HOH 1117 A HOH 118 3 HOH HOH 1118 A HOH 119 3 HOH HOH 1119 A HOH 120 3 HOH HOH 1120 A HOH 121 3 HOH HOH 1121 A HOH 122 3 HOH HOH 1122 A HOH 123 3 HOH HOH 1123 A HOH 124 3 HOH HOH 1124 A HOH 125 3 HOH HOH 1125 A HOH 126 3 HOH HOH 1126 A HOH 127 3 HOH HOH 1127 A HOH 129 3 HOH HOH 1128 A HOH 130 3 HOH HOH 1129 A HOH 131 3 HOH HOH 1130 A HOH 132 3 HOH HOH 1131 A HOH 133 3 HOH HOH 1132 A HOH 134 3 HOH HOH 1133 A HOH 135 3 HOH HOH 1134 A HOH 136 3 HOH HOH 1135 A HOH 137 3 HOH HOH 1136 A HOH 138 3 HOH HOH 1137 A HOH 139 3 HOH HOH 1138 A HOH 140 3 HOH HOH 1139 A HOH 141 3 HOH HOH 1140 A HOH 142 3 HOH HOH 1141 A HOH 143 3 HOH HOH 1142 A HOH 144 3 HOH HOH 1143 A HOH 145 3 HOH HOH 1144 A HOH 146 3 HOH HOH 1145 A HOH 147 3 HOH HOH 1146 A HOH 148 3 HOH HOH 1147 A HOH 149 3 HOH HOH 1148 A GLU 0 n 1 GLU 0 A ALA 1 n 2 ALA 1 A SER 2 n 3 SER 2 A CYS 3 n 4 CYS 3 A GLY 4 n 5 GLY 4 A SER 5 n 6 SER 5 A PRO 6 n 7 PRO 6 A PRO 7 n 8 PRO 7 A PRO 8 n 9 PRO 8 A ILE 9 n 10 ILE 9 A LEU 10 n 11 LEU 10 A ASN 11 n 12 ASN 11 A GLY 12 n 13 GLY 12 A ARG 13 n 14 ARG 13 A ILE 14 n 15 ILE 14 A SER 15 n 16 SER 15 A TYR 16 n 17 TYR 16 A TYR 17 n 18 TYR 17 A SER 18 n 19 SER 18 A THR 19 n 20 THR 19 A PRO 20 n 21 PRO 20 A ILE 21 n 22 ILE 21 A ALA 22 n 23 ALA 22 A VAL 23 n 24 VAL 23 A GLY 24 n 25 GLY 24 A THR 25 n 26 THR 25 A VAL 26 n 27 VAL 26 A ILE 27 n 28 ILE 27 A ARG 28 n 29 ARG 28 A TYR 29 n 30 TYR 29 A SER 30 n 31 SER 30 A CYS 31 n 32 CYS 31 A SER 32 n 33 SER 32 A GLY 33 n 34 GLY 33 A THR 34 n 35 THR 34 A PHE 35 n 36 PHE 35 A ARG 36 n 37 ARG 36 A LEU 37 n 38 LEU 37 A ILE 38 n 39 ILE 38 A GLY 39 n 40 GLY 39 A GLU 40 n 41 GLU 40 A LYS 41 n 42 LYS 41 A SER 42 n 43 SER 42 A LEU 43 n 44 LEU 43 A LEU 44 n 45 LEU 44 A CYS 45 n 46 CYS 45 A ILE 46 n 47 ILE 46 A THR 47 n 48 THR 47 A LYS 48 n 49 LYS 48 A ASP 49 n 50 ASP 49 A LYS 50 n 51 LYS 50 A VAL 51 n 52 VAL 51 A ASP 52 n 53 ASP 52 A GLY 53 n 54 GLY 53 A THR 54 n 55 THR 54 A TRP 55 n 56 TRP 55 A ASP 56 n 57 ASP 56 A LYS 57 n 58 LYS 57 A PRO 58 n 59 PRO 58 A ALA 59 n 60 ALA 59 A PRO 60 n 61 PRO 60 A LYS 61 n 62 LYS 61 A CYS 62 n 63 CYS 62 A GLU 63 n 64 GLU 63 A TYR 64 n 65 TYR 64 A PHE 65 n 66 PHE 65 A ASN 66 n 67 ASN 66 A LYS 67 n 68 LYS 67 A TYR 68 n 69 TYR 68 A SER 69 n 70 SER 69 A SER 70 n 71 SER 70 A CYS 71 n 72 CYS 71 A PRO 72 n 73 PRO 72 A GLU 73 n 74 GLU 73 A PRO 74 n 75 PRO 74 A ILE 75 n 76 ILE 75 A VAL 76 n 77 VAL 76 A PRO 77 n 78 PRO 77 A GLY 78 n 79 GLY 78 A GLY 79 n 80 GLY 79 A TYR 80 n 81 TYR 80 A LYS 81 n 82 LYS 81 A ILE 82 n 83 ILE 82 A ARG 83 n 84 ARG 83 A GLY 84 n 85 GLY 84 A SER 85 n 86 SER 85 A THR 86 n 87 THR 86 A PRO 87 n 88 PRO 87 A TYR 88 n 89 TYR 88 A ARG 89 n 90 ARG 89 A HIS 90 n 91 HIS 90 A GLY 91 n 92 GLY 91 A ASP 92 n 93 ASP 92 A SER 93 n 94 SER 93 A VAL 94 n 95 VAL 94 A THR 95 n 96 THR 95 A PHE 96 n 97 PHE 96 A ALA 97 n 98 ALA 97 A CYS 98 n 99 CYS 98 A LYS 99 n 100 LYS 99 A THR 100 n 101 THR 100 A ASN 101 n 102 ASN 101 A PHE 102 n 103 PHE 102 A SER 103 n 104 SER 103 A MET 104 n 105 MET 104 A ASN 105 n 106 ASN 105 A GLY 106 n 107 GLY 106 A ASN 107 n 108 ASN 107 A LYS 108 n 109 LYS 108 A SER 109 n 110 SER 109 A VAL 110 n 111 VAL 110 A TRP 111 n 112 TRP 111 A CYS 112 n 113 CYS 112 A GLN 113 n 114 GLN 113 A ALA 114 n 115 ALA 114 A ASN 115 n 116 ASN 115 A ASN 116 n 117 ASN 116 A MET 117 n 118 MET 117 A TRP 118 n 119 TRP 118 A GLY 119 n 120 GLY 119 A PRO 120 n 121 PRO 120 A THR 121 n 122 THR 121 A ARG 122 n 123 ARG 122 A LEU 123 n 124 LEU 123 A PRO 124 n 125 PRO 124 A THR 125 n 126 THR 125 A CYS 126 n 127 CYS 126 A VAL 127 n 128 VAL 127 A SER 128 n 129 SER 128 A ILE 129 n 130 ILE 129 A author_defined_assembly 1 monomeric A ASN 101 GLYCOSYLATION SITE A ASN 102 ASN A ASN 107 GLYCOSYLATION SITE A ASN 108 ASN 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 1_555 x,y,z identity operation 0.0000000000 0.0000000000 0.0000000000 A N CYS 3 A N CYS 4 A O ILE 21 A O ILE 22 A N ARG 13 A N ARG 14 A O SER 30 A O SER 31 A N ILE 27 A N ILE 28 A O LEU 43 A O LEU 44 A N ILE 46 A N ILE 47 A O THR 54 A O THR 55 A N ILE 38 A N ILE 39 A O LYS 61 A O LYS 62 A N CYS 71 A N CYS 72 A O TYR 88 A O TYR 89 A N TYR 80 A N TYR 81 A O ALA 97 A O ALA 98 A N VAL 94 A N VAL 95 A O VAL 110 A O VAL 111 A N TRP 111 A N TRP 112 A O GLY 119 A O GLY 120 A N SER 103 A N SER 104 A O VAL 127 A O VAL 128 0.234 0.179 1.80 20.0 1127 12743 11265 10. random 1 THROUGHOUT 0.0 MOLECULAR REPLACEMENT Crystal structure of liganded CD21 (complex with C3d) Engh & Huber 1.80 20.0 146 1170 28 0 996 0.007 1.34 1.80 30 1LY2 12743 11265 1 88.4 1.80 1.90 0.1 1 55.8 data reduction DENZO data scaling SCALEPACK phasing AMoRE refinement X-PLOR Crystal structure of unliganded human CD21 SCR1-SCR2 (Complement receptor type 2) 1 N N 2 N N 2 N N 3 N N disulf 2.035 A CYS 3 A SG CYS 4 1_555 A CYS 45 A SG CYS 46 1_555 disulf 2.042 A CYS 31 A SG CYS 32 1_555 A CYS 62 A SG CYS 63 1_555 disulf 2.054 A CYS 71 A SG CYS 72 1_555 A CYS 112 A SG CYS 113 1_555 disulf 2.047 A CYS 98 A SG CYS 99 1_555 A CYS 126 A SG CYS 127 1_555 covale 1.455 one N-Glycosylation A ASN 101 A ND2 ASN 102 1_555 A NAG 1001 B C1 NAG 1_555 covale 1.459 one N-Glycosylation A ASN 107 A ND2 ASN 108 1_555 A NAG 1002 C C1 NAG 1_555 IMMUNE SYSTEM Complement receptor; Epstein Barr virus; Regulator of complement activation; short consensus repeat; viral receptor; complement control protein, IMMUNE SYSTEM A THR 19 A THR 20 1 A PRO 20 A PRO 21 -0.16 A THR 86 A THR 87 1 A PRO 87 A PRO 88 -0.22 A GLY 119 A GLY 120 1 A PRO 120 A PRO 121 0.15 CR2_HUMAN UNP 1 20 P20023 GISCGSPPPILNGRISYYSTPIAVGTVIRYSCSGTFRLIGEKSLLCITKDKVDGTWDKPAPKCEYFNKYSSCPEPIVPGG YKIRGSTPYRHGDSVTFACKTNFSMNGNKSVWCQANNMWGPTRLPTCVSV 20 149 1LY2 0 129 P20023 A 1 1 130 1 GLY cloning artifact GLU 0 1LY2 A P20023 UNP 20 1 1 ILE cloning artifact ALA 1 1LY2 A P20023 UNP 21 2 1 VAL cloning artifact ILE 129 1LY2 A P20023 UNP 149 130 2 4 2 2 4 2 anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel A SER 2 A SER 3 A CYS 3 A CYS 4 A ILE 21 A ILE 22 A ALA 22 A ALA 23 A GLY 12 A GLY 13 A ILE 14 A ILE 15 A VAL 26 A VAL 27 A CYS 31 A CYS 32 A SER 42 A SER 43 A ILE 46 A ILE 47 A THR 54 A THR 55 A TRP 55 A TRP 56 A PHE 35 A PHE 36 A ILE 38 A ILE 39 A LYS 61 A LYS 62 A TYR 64 A TYR 65 A SER 70 A SER 71 A CYS 71 A CYS 72 A TYR 88 A TYR 89 A ARG 89 A ARG 90 A GLY 79 A GLY 80 A ARG 83 A ARG 84 A SER 93 A SER 94 A CYS 98 A CYS 99 A SER 109 A SER 110 A CYS 112 A CYS 113 A TRP 118 A TRP 119 A GLY 119 A GLY 120 A PHE 102 A PHE 103 A ASN 105 A ASN 106 A THR 125 A THR 126 A SER 128 A SER 129 1 triclinic P 1