0.016892 0.000000 0.000000 0.000000 0.016892 0.000000 0.000000 0.000000 0.005562 0.000000 0.000000 0.000000 Le Trong, I. Freitag, S. Klumb, L.A. Chu, V. Stayton, P.S. Stenkamp, R.E. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 16 90.00 90.00 90.00 59.2 59.2 179.8 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 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 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 S C N 76 N C N 77 N O N 78 N C N 79 N C N 80 N C N 81 N O N 82 N N N 83 N O N 84 N H N 85 N H N 86 N H N 87 N H N 88 N H N 89 N H N 90 N H N 91 N H N 92 N H N 93 N H N 94 N N N 95 S C N 96 N C N 97 N O N 98 N C N 99 N C N 100 N C N 101 N O N 102 N O N 103 N O N 104 N H N 105 N H N 106 N H N 107 N H N 108 N H N 109 N H N 110 N H N 111 N H N 112 N H N 113 N N N 114 N C N 115 N C 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 N N 124 S C N 125 N C N 126 N O N 127 N C Y 128 N C Y 129 N N Y 130 N C Y 131 N C Y 132 N N N 133 N O N 134 N H N 135 N H N 136 N H N 137 N H N 138 N H N 139 N H N 140 N H N 141 N H N 142 N H N 143 N H N 144 N O N 145 N H N 146 N H N 147 N N N 148 S C N 149 N C N 150 N O N 151 S C N 152 N C N 153 N C N 154 N C N 155 N O N 156 N H N 157 N H N 158 N H N 159 N H N 160 N H N 161 N H N 162 N H N 163 N H N 164 N H N 165 N H N 166 N H N 167 N H N 168 N H N 169 N N N 170 S C N 171 N C N 172 N O N 173 N C N 174 N C N 175 N C N 176 N C N 177 N O N 178 N H N 179 N H N 180 N H N 181 N H N 182 N H N 183 N H N 184 N H N 185 N H N 186 N H N 187 N H N 188 N H N 189 N H N 190 N H N 191 N N N 192 S C N 193 N C N 194 N O N 195 N C N 196 N C N 197 N C N 198 N C N 199 N N N 200 N O N 201 N H N 202 N H N 203 N H N 204 N H N 205 N H N 206 N H N 207 N H N 208 N H N 209 N H N 210 N H N 211 N H N 212 N H N 213 N H N 214 N H N 215 N H N 216 N N N 217 S C N 218 N C N 219 N O N 220 N C Y 221 N C Y 222 N C Y 223 N C Y 224 N C Y 225 N C Y 226 N C N 227 N O N 228 N H N 229 N H N 230 N H N 231 N H N 232 N H N 233 N H N 234 N H N 235 N H N 236 N H N 237 N H N 238 N H N 239 N N N 240 S C N 241 N C N 242 N O N 243 N C N 244 N C N 245 N C N 246 N O N 247 N H N 248 N H N 249 N H N 250 N H N 251 N H N 252 N H N 253 N H N 254 N H N 255 N H N 256 N N N 257 S C N 258 N C N 259 N O N 260 N C N 261 N O N 262 N O N 263 N H N 264 N H N 265 N H N 266 N H N 267 N H N 268 N H N 269 N H N 270 N N N 271 S C N 272 N C N 273 N O N 274 R C N 275 N O N 276 N C N 277 N O N 278 N H N 279 N H N 280 N H N 281 N H N 282 N H N 283 N H N 284 N H N 285 N H N 286 N H N 287 N N N 288 S C N 289 N C N 290 N O N 291 N C Y 292 N C Y 293 N C Y 294 N C Y 295 N N Y 296 N C Y 297 N C Y 298 N C Y 299 N C Y 300 N C N 301 N O N 302 N H N 303 N H N 304 N H N 305 N H N 306 N H N 307 N H N 308 N H N 309 N H N 310 N H N 311 N H N 312 N H N 313 N H N 314 N N N 315 S C N 316 N C N 317 N O N 318 N C Y 319 N C Y 320 N C Y 321 N C Y 322 N C Y 323 N C Y 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 H N 335 N H N 336 N H N 337 N H N 338 N N N 339 S C N 340 N C N 341 N O N 342 N C N 343 N C N 344 N C N 345 N O N 346 N H N 347 N H N 348 N H N 349 N H N 350 N H N 351 N H N 352 N H N 353 N H N 354 N H N 355 N H N 356 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 doub N 85 N sing N 86 N sing N 87 N sing N 88 N sing N 89 N sing N 90 N sing N 91 N sing N 92 N sing N 93 N sing N 94 N sing N 95 N doub N 96 N sing N 97 N sing N 98 N sing N 99 N sing N 100 N sing N 101 N sing N 102 N sing N 103 N doub N 104 N sing N 105 N sing N 106 N sing N 107 N sing N 108 N sing N 109 N sing N 110 N sing N 111 N sing N 112 N sing N 113 N doub N 114 N sing N 115 N sing N 116 N sing N 117 N sing N 118 N sing N 119 N sing N 120 N sing N 121 N sing N 122 N doub N 123 N sing N 124 N sing N 125 N sing N 126 N sing Y 127 N sing Y 128 N doub Y 129 N doub N 130 N sing Y 131 N sing N 132 N sing Y 133 N sing N 134 N sing N 135 N sing N 136 N sing N 137 N sing N 138 N sing N 139 N sing N 140 N sing N 141 N sing N 142 N sing N 143 N sing N 144 N sing N 145 N doub N 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 sing 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 doub 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 sing 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 doub 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 sing 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 doub N 212 N sing N 213 N sing N 214 N sing N 215 N sing Y 216 N doub Y 217 N sing Y 218 N sing N 219 N sing Y 220 N doub N 221 N sing Y 222 N doub N 223 N sing Y 224 N sing 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 doub 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 doub 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 sing N 259 N sing N 260 N sing N 261 N sing N 262 N sing N 263 N sing N 264 N doub 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 sing N 274 N sing N 275 N sing N 276 N sing N 277 N sing N 278 N sing N 279 N sing N 280 N doub N 281 N sing N 282 N sing N 283 N sing N 284 N sing Y 285 N doub Y 286 N sing Y 287 N sing N 288 N sing Y 289 N doub Y 290 N sing Y 291 N sing N 292 N sing Y 293 N sing Y 294 N doub N 295 N sing Y 296 N doub N 297 N sing Y 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 doub N 309 N sing N 310 N sing N 311 N sing N 312 N sing Y 313 N doub Y 314 N sing Y 315 N sing N 316 N sing Y 317 N doub N 318 N sing Y 319 N doub N 320 N sing Y 321 N sing N 322 N sing N 323 N sing N 324 N sing N 325 N sing N 326 N sing N 327 N sing N 328 N sing N 329 N sing N 330 N sing N 331 N sing N 332 N doub 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 sing N 343 N sing DK Acta Crystallogr.,Sect.D ABCRE6 0766 0907-4449 59 1567 1573 10.1107/S0907444903014562 12925786 Structural studies of hydrogen bonds in the high-affinity streptavidin-biotin complex: mutations of amino acids interacting with the ureido oxygen of biotin. 2003 10.2210/pdb1n4j/pdb pdb_00001n4j 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 293 1 AREA DETECTOR 1996-07-03 XENTRONICS graphite SINGLE WAVELENGTH M x-ray 1 1.5418 1.0 1.5418 ROTATING ANODE SIEMENS 13238.311 Streptavidin core streptavidin, residues 13-139 N23A 1 man polymer 18.015 water 63 nat water no no AEAGITGTWYAQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTW SGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAAS AEAGITGTWYAQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTW SGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAAS 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 Streptomyces Escherichia Escherichia coli sample core streptavidin 1895 Streptomyces avidinii 511693 Escherichia coli BL21 BL21 plasmid pET21a 1 2.81 58.65 VAPOR DIFFUSION, SITTING DROP 6.2 PEG4000, phosphate buffer, pH 6.2, VAPOR DIFFUSION, SITTING DROP, temperature 293K 293 software database_2 struct_ref_seq_dif chem_comp_atom chem_comp_bond pdbx_initial_refinement_model repository Initial release Version format compliance Version format compliance Refinement description Database references Data collection Refinement description 1 0 2003-09-02 1 1 2008-04-28 1 2 2011-07-13 1 3 2017-10-11 1 4 2021-10-27 1 5 2024-02-14 _database_2.pdbx_DOI _database_2.pdbx_database_accession _struct_ref_seq_dif.details Apo-Core-Streptavidin in Complex with Biotin at pH 4.5 Streptavidin Mutant N23A with Biotin at 1.89A resolution. RCSB Y RCSB 2002-10-31 REL REL HOH water 1RST PDB experimental model HOH 6001 2 HOH HOH 6001 A HOH 6002 2 HOH HOH 6002 A HOH 6003 2 HOH HOH 6003 A HOH 6004 2 HOH HOH 6004 A HOH 6005 2 HOH HOH 6005 A HOH 6006 2 HOH HOH 6006 A HOH 6007 2 HOH HOH 6007 A HOH 6008 2 HOH HOH 6008 A HOH 6009 2 HOH HOH 6009 A HOH 6010 2 HOH HOH 6010 A HOH 6011 2 HOH HOH 6011 A HOH 6012 2 HOH HOH 6012 A HOH 6013 2 HOH HOH 6013 A HOH 6014 2 HOH HOH 6014 A HOH 6015 2 HOH HOH 6015 A HOH 6016 2 HOH HOH 6016 A HOH 6017 2 HOH HOH 6017 A HOH 6018 2 HOH HOH 6018 A HOH 6019 2 HOH HOH 6019 A HOH 6020 2 HOH HOH 6020 A HOH 6021 2 HOH HOH 6021 A HOH 6022 2 HOH HOH 6022 A HOH 6023 2 HOH HOH 6023 A HOH 6024 2 HOH HOH 6024 A HOH 6025 2 HOH HOH 6025 A HOH 6026 2 HOH HOH 6026 A HOH 6027 2 HOH HOH 6027 A HOH 6028 2 HOH HOH 6028 A HOH 6029 2 HOH HOH 6029 A HOH 6030 2 HOH HOH 6030 A HOH 6031 2 HOH HOH 6031 A HOH 6032 2 HOH HOH 6032 A HOH 6033 2 HOH HOH 6033 A HOH 6034 2 HOH HOH 6034 A HOH 6035 2 HOH HOH 6035 A HOH 6036 2 HOH HOH 6036 A HOH 6037 2 HOH HOH 6037 A HOH 6038 2 HOH HOH 6038 A HOH 6039 2 HOH HOH 6039 A HOH 6040 2 HOH HOH 6040 A HOH 6041 2 HOH HOH 6041 A HOH 6042 2 HOH HOH 6042 A HOH 6043 2 HOH HOH 6043 A HOH 6044 2 HOH HOH 6044 A HOH 6045 2 HOH HOH 6045 A HOH 6046 2 HOH HOH 6046 A HOH 6047 2 HOH HOH 6047 A HOH 6048 2 HOH HOH 6048 A HOH 6049 2 HOH HOH 6049 A HOH 6050 2 HOH HOH 6050 A HOH 6051 2 HOH HOH 6051 A HOH 6052 2 HOH HOH 6052 A HOH 6053 2 HOH HOH 6053 A HOH 6054 2 HOH HOH 6054 A HOH 6055 2 HOH HOH 6055 A HOH 6056 2 HOH HOH 6056 A HOH 6057 2 HOH HOH 6057 A HOH 6058 2 HOH HOH 6058 A HOH 6059 2 HOH HOH 6059 A HOH 6060 2 HOH HOH 6060 A HOH 6061 2 HOH HOH 6061 A HOH 6062 2 HOH HOH 6062 A HOH 6063 2 HOH HOH 6063 A n 1 13 A n 2 14 A n 3 15 A GLY 16 n 4 GLY 16 A ILE 17 n 5 ILE 17 A THR 18 n 6 THR 18 A GLY 19 n 7 GLY 19 A THR 20 n 8 THR 20 A TRP 21 n 9 TRP 21 A TYR 22 n 10 TYR 22 A ALA 23 n 11 ALA 23 A GLN 24 n 12 GLN 24 A LEU 25 n 13 LEU 25 A GLY 26 n 14 GLY 26 A SER 27 n 15 SER 27 A THR 28 n 16 THR 28 A PHE 29 n 17 PHE 29 A ILE 30 n 18 ILE 30 A VAL 31 n 19 VAL 31 A THR 32 n 20 THR 32 A ALA 33 n 21 ALA 33 A GLY 34 n 22 GLY 34 A ALA 35 n 23 ALA 35 A ASP 36 n 24 ASP 36 A GLY 37 n 25 GLY 37 A ALA 38 n 26 ALA 38 A LEU 39 n 27 LEU 39 A THR 40 n 28 THR 40 A GLY 41 n 29 GLY 41 A THR 42 n 30 THR 42 A TYR 43 n 31 TYR 43 A GLU 44 n 32 GLU 44 A n 33 45 A n 34 46 A n 35 47 A n 36 48 A n 37 49 A ALA 50 n 38 ALA 50 A GLU 51 n 39 GLU 51 A SER 52 n 40 SER 52 A ARG 53 n 41 ARG 53 A TYR 54 n 42 TYR 54 A VAL 55 n 43 VAL 55 A LEU 56 n 44 LEU 56 A THR 57 n 45 THR 57 A GLY 58 n 46 GLY 58 A ARG 59 n 47 ARG 59 A TYR 60 n 48 TYR 60 A ASP 61 n 49 ASP 61 A SER 62 n 50 SER 62 A ALA 63 n 51 ALA 63 A PRO 64 n 52 PRO 64 A ALA 65 n 53 ALA 65 A THR 66 n 54 THR 66 A ASP 67 n 55 ASP 67 A GLY 68 n 56 GLY 68 A SER 69 n 57 SER 69 A GLY 70 n 58 GLY 70 A THR 71 n 59 THR 71 A ALA 72 n 60 ALA 72 A LEU 73 n 61 LEU 73 A GLY 74 n 62 GLY 74 A TRP 75 n 63 TRP 75 A THR 76 n 64 THR 76 A VAL 77 n 65 VAL 77 A ALA 78 n 66 ALA 78 A TRP 79 n 67 TRP 79 A LYS 80 n 68 LYS 80 A ASN 81 n 69 ASN 81 A ASN 82 n 70 ASN 82 A TYR 83 n 71 TYR 83 A ARG 84 n 72 ARG 84 A ASN 85 n 73 ASN 85 A ALA 86 n 74 ALA 86 A HIS 87 n 75 HIS 87 A SER 88 n 76 SER 88 A ALA 89 n 77 ALA 89 A THR 90 n 78 THR 90 A THR 91 n 79 THR 91 A TRP 92 n 80 TRP 92 A SER 93 n 81 SER 93 A GLY 94 n 82 GLY 94 A GLN 95 n 83 GLN 95 A TYR 96 n 84 TYR 96 A VAL 97 n 85 VAL 97 A GLY 98 n 86 GLY 98 A GLY 99 n 87 GLY 99 A ALA 100 n 88 ALA 100 A GLU 101 n 89 GLU 101 A ALA 102 n 90 ALA 102 A ARG 103 n 91 ARG 103 A ILE 104 n 92 ILE 104 A ASN 105 n 93 ASN 105 A THR 106 n 94 THR 106 A GLN 107 n 95 GLN 107 A TRP 108 n 96 TRP 108 A LEU 109 n 97 LEU 109 A LEU 110 n 98 LEU 110 A THR 111 n 99 THR 111 A SER 112 n 100 SER 112 A GLY 113 n 101 GLY 113 A THR 114 n 102 THR 114 A THR 115 n 103 THR 115 A GLU 116 n 104 GLU 116 A ALA 117 n 105 ALA 117 A ASN 118 n 106 ASN 118 A ALA 119 n 107 ALA 119 A TRP 120 n 108 TRP 120 A LYS 121 n 109 LYS 121 A SER 122 n 110 SER 122 A THR 123 n 111 THR 123 A LEU 124 n 112 LEU 124 A VAL 125 n 113 VAL 125 A GLY 126 n 114 GLY 126 A HIS 127 n 115 HIS 127 A ASP 128 n 116 ASP 128 A THR 129 n 117 THR 129 A PHE 130 n 118 PHE 130 A THR 131 n 119 THR 131 A LYS 132 n 120 LYS 132 A VAL 133 n 121 VAL 133 A n 122 134 A n 123 135 A n 124 136 A n 125 137 A n 126 138 A n 127 139 A 0.1617 0.19 0.1579 0.1867 0.2202 0.2526 574 739 9.7 10.0 5898 author_defined_assembly 4 tetrameric 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 0.0000000000 1.0000000000 0.0000000000 1.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000 -1.0000000000 15_556 y,x,-z+1 crystal symmetry operation 0.0000000000 0.0000000000 179.8000000000 -1.0000000000 0.0000000000 0.0000000000 0.0000000000 -1.0000000000 0.0000000000 0.0000000000 0.0000000000 1.0000000000 10_555 -x,-y,z crystal symmetry operation 0.0000000000 0.0000000000 0.0000000000 0.0000000000 -1.0000000000 0.0000000000 -1.0000000000 0.0000000000 0.0000000000 0.0000000000 0.0000000000 -1.0000000000 8_556 -y,-x,-z+1 crystal symmetry operation 0.0000000000 0.0000000000 179.8000000000 A N TRP 21 A N TRP 9 A O PHE 29 A O PHE 17 A N THR 32 A N THR 20 A O THR 40 A O THR 28 A N TYR 43 A N TYR 31 A O TYR 54 A O TYR 42 A N THR 57 A N THR 45 A O THR 76 A O THR 64 A N TRP 75 A N TRP 63 A O TRP 92 A O TRP 80 A N VAL 97 A N VAL 85 A O ARG 103 A O ARG 91 A N THR 106 A N THR 94 A O ASP 128 A O ASP 116 A O THR 131 A O THR 119 A N TYR 22 A N TYR 10 1 A HOH 6036 B HOH 1 A ALA 13 A ALA 1 1 Y 1 A GLU 14 A GLU 2 1 Y 1 A ALA 15 A ALA 3 1 Y 1 A SER 45 A SER 33 1 Y 1 A ALA 46 A ALA 34 1 Y 1 A VAL 47 A VAL 35 1 Y 1 A GLY 48 A GLY 36 1 Y 1 A ASN 49 A ASN 37 1 Y 1 A LYS 134 A LYS 122 1 Y 1 A PRO 135 A PRO 123 1 Y 1 A SER 136 A SER 124 1 Y 1 A ALA 137 A ALA 125 1 Y 1 A ALA 138 A ALA 126 1 Y 1 A SER 139 A SER 127 1 Y 1 A GLU 101 -111.61 61.64 0.2526 0.188 2.18 10.00 3649 739 7392 7392 3560 10.0 85.1 RANDOM 1 FREE R 0.0 isomorphous 1RST ENGH AND HUBER 0 799.00 911.50 2.18 10.00 63 912 0 0 849 0.005 0.022 0.000 0.0237 0.024 0.034 0.010 0.000 0.052 0.000 2.18 50 1N4J 26865 26865 0 0.07 1 86 data collection FRAMBO data reduction SAINT data reduction SADABS refinement SHELXL-97 data scaling SAINT data scaling SADABS STREPTAVIDIN MUTANT N23A AT 2.18A 1 N N 2 N N A ASN 118 A ASN 106 HELX_P A LYS 121 A LYS 109 5 1 4 BIOTIN-BINDING PROTEIN homotetramer, BIOTIN-BINDING PROTEIN SAV_STRAV UNP 1 37 P22629 AEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTW SGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAAS 37 163 1N4J 13 139 P22629 A 1 1 127 1 ASN engineered mutation ALA 23 1N4J A P22629 UNP 47 11 9 anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel A GLY 19 A GLY 7 A ALA 23 A ALA 11 A THR 28 A THR 16 A ALA 33 A ALA 21 A ALA 38 A ALA 26 A GLU 44 A GLU 32 A TYR 54 A TYR 42 A TYR 60 A TYR 48 A THR 71 A THR 59 A LYS 80 A LYS 68 A ASN 85 A ASN 73 A VAL 97 A VAL 85 A ARG 103 A ARG 91 A SER 112 A SER 100 A THR 123 A THR 111 A THR 131 A THR 119 A GLY 19 A GLY 7 A ALA 23 A ALA 11 98 I 41 2 2