1NQI - Sequence, Chains, Asymmetric and Biological Units

• Title: CRYSTAL STRUCTURE OF LACTOSE SYNTHASE, A 1:1 COMPLEX BETWEEN GALACTOSYLTRANSFERASE AND ALPHA-LACTALBUMIN IN THE PRESENCE
• Keywords: LACTOSE SYNTHASE, N-ACETYLGLUCOSAMINE BINDING, TRANSFERASE A TRANSFERASE COMPLEX
• Experiment: X-ray diffraction
• Number of Models: 1

Database	ID code	Status	Coordinate files
			Header	Asymmetric unit	Biological unit
PDB	1NQI	released	available	available	Quaternary Structure Server

Asymmetric unit from PDB

Unit	Type	Name	Chain ID	Residues	Atoms	Hetatoms
1	Protein	ALPHA-LACTALBUMIN	A	123	980	0
2	Protein	BETA-1,4-GALACTOSYLTRANSFERASE	B	272	2218	0
3	Protein	ALPHA-LACTALBUMIN	C	123	980	0
4	Protein	BETA-1,4-GALACTOSYLTRANSFERASE	D	272	2218	0
5	Ligand	ALPHA-LACTALBUMIN	A	1	0	1
6	Ligand	BETA-1,4-GALACTOSYLTRANSFERASE	B	1	0	15
7	Ligand	ALPHA-LACTALBUMIN	C	1	0	1
8	Ligand	BETA-1,4-GALACTOSYLTRANSFERASE	D	1	0	15
9	Water			770	0	770
total				1564	6396	802

Proteins

Unit 1	THR 1 GLU 2 LEU 3 THR 4 LYS 5 CYS 6 LYS 7 VAL 8 SER 9 HIS 10 ALA 11 ILE 12 LYS 13 ASP 14 ILE 15 ASP 16 GLY 17 TYR 18 GLN 19 GLY 20 ILE 21 SER 22 LEU 23 LEU 24 GLU 25 TRP 26 ALA 27 CYS 28 VAL 29 LEU 30 PHE 31 HIS 32 THR 33 SER 34 GLY 35 TYR 36 ASP 37 THR 38 GLN 39 ALA 40 VAL 41 VAL 42 ASN 43 ASP 44 ASN 45 GLY 46 SER 47 THR 48 GLU 49 TYR 50 GLY 51 LEU 52 PHE 53 GLN 54 ILE 55 SER 56 ASP 57 ARG 58 PHE 59 TRP 60 CYS 61 LYS 62 SER 63 SER 64 GLU 65 PHE 66 PRO 67 GLU 68 SER 69 GLU 70 ASN 71 ILE 72 CYS 73 GLY 74 ILE 75 SER 76 CYS 77 ASP 78 LYS 79 LEU 80 LEU 81 ASP 82 ASP 83 GLU 84 LEU 85 ASP 86 ASP 87 ASP 88 ILE 89 ALA 90 CYS 91 ALA 92 LYS 93 LYS 94 ILE 95 LEU 96 ALA 97 ILE 98 LYS 99 GLY 100 ILE 101 ASP 102 TYR 103 TRP 104 LYS 105 ALA 106 TYR 107 LYS 108 PRO 109 MET 110 CYS 111 SER 112 GLU 113 LYS 114 LEU 115 GLU 116 GLN 117 TRP 118 ARG 119 CYS 120 GLU 121 LYS 122 PRO 123
Unit 2	LEU 131 THR 132 ALA 133 CYS 134 PRO 135 GLU 136 GLU 137 SER 138 PRO 139 LEU 140 LEU 141 VAL 142 GLY 143 PRO 144 MET 145 LEU 146 ILE 147 GLU 148 PHE 149 ASN 150 ILE 151 PRO 152 VAL 153 ASP 154 LEU 155 LYS 156 LEU 157 VAL 158 GLU 159 GLN 160 GLN 161 ASN 162 PRO 163 LYS 164 VAL 165 LYS 166 LEU 167 GLY 168 GLY 169 ARG 170 TYR 171 THR 172 PRO 173 MET 174 ASP 175 CYS 176 ILE 177 SER 178 PRO 179 HIS 180 LYS 181 VAL 182 ALA 183 ILE 184 ILE 185 ILE 186 PRO 187 PHE 188 ARG 189 ASN 190 ARG 191 GLN 192 GLU 193 HIS 194 LEU 195 LYS 196 TYR 197 TRP 198 LEU 199 TYR 200 TYR 201 LEU 202 HIS 203 PRO 204 ILE 205 LEU 206 GLN 207 ARG 208 GLN 209 GLN 210 LEU 211 ASP 212 TYR 213 GLY 214 ILE 215 TYR 216 VAL 217 ILE 218 ASN 219 GLN 220 ALA 221 GLY 222 GLU 223 SER 224 MET 225 PHE 226 ASN 227 ARG 228 ALA 229 LYS 230 LEU 231 LEU 232 ASN 233 VAL 234 GLY 235 PHE 236 LYS 237 GLU 238 ALA 239 LEU 240 LYS 241 ASP 242 TYR 243 ASP 244 TYR 245 ASN 246 CYS 247 PHE 248 VAL 249 PHE 250 SER 251 ASP 252 VAL 253 ASP 254 LEU 255 ILE 256 PRO 257 MET 258 ASN 259 ASP 260 HIS 261 ASN 262 THR 263 TYR 264 ARG 265 CYS 266 PHE 267 SER 268 GLN 269 PRO 270 ARG 271 HIS 272 ILE 273 SER 274 VAL 275 ALA 276 MET 277 ASP 278 LYS 279 PHE 280 GLY 281 PHE 282 SER 283 LEU 284 PRO 285 TYR 286 VAL 287 GLN 288 TYR 289 PHE 290 GLY 291 GLY 292 VAL 293 SER 294 ALA 295 LEU 296 SER 297 LYS 298 GLN 299 GLN 300 PHE 301 LEU 302 SER 303 ILE 304 ASN 305 GLY 306 PHE 307 PRO 308 ASN 309 ASN 310 TYR 311 TRP 312 GLY 313 TRP 314 GLY 315 GLY 316 GLU 317 ASP 318 ASP 319 ASP 320 ILE 321 TYR 322 ASN 323 ARG 324 LEU 325 ALA 326 PHE 327 ARG 328 GLY 329 MET 330 SER 331 VAL 332 SER 333 ARG 334 PRO 335 ASN 336 ALA 337 VAL 338 ILE 339 GLY 340 LYS 341 CYS 342 ARG 343 MET 344 ILE 345 ARG 346 HIS 347 SER 348 ARG 349 ASP 350 LYS 351 LYS 352 ASN 353 GLU 354 PRO 355 ASN 356 PRO 357 GLN 358 ARG 359 PHE 360 ASP 361 ARG 362 ILE 363 ALA 364 HIS 365 THR 366 LYS 367 GLU 368 THR 369 MET 370 LEU 371 SER 372 ASP 373 GLY 374 LEU 375 ASN 376 SER 377 LEU 378 THR 379 TYR 380 MET 381 VAL 382 LEU 383 GLU 384 VAL 385 GLN 386 ARG 387 TYR 388 PRO 389 LEU 390 TYR 391 THR 392 LYS 393 ILE 394 THR 395 VAL 396 ASP 397 ILE 398 GLY 399 THR 400 PRO 401 SER 402
Unit 3	THR 1 GLU 2 LEU 3 THR 4 LYS 5 CYS 6 LYS 7 VAL 8 SER 9 HIS 10 ALA 11 ILE 12 LYS 13 ASP 14 ILE 15 ASP 16 GLY 17 TYR 18 GLN 19 GLY 20 ILE 21 SER 22 LEU 23 LEU 24 GLU 25 TRP 26 ALA 27 CYS 28 VAL 29 LEU 30 PHE 31 HIS 32 THR 33 SER 34 GLY 35 TYR 36 ASP 37 THR 38 GLN 39 ALA 40 VAL 41 VAL 42 ASN 43 ASP 44 ASN 45 GLY 46 SER 47 THR 48 GLU 49 TYR 50 GLY 51 LEU 52 PHE 53 GLN 54 ILE 55 SER 56 ASP 57 ARG 58 PHE 59 TRP 60 CYS 61 LYS 62 SER 63 SER 64 GLU 65 PHE 66 PRO 67 GLU 68 SER 69 GLU 70 ASN 71 ILE 72 CYS 73 GLY 74 ILE 75 SER 76 CYS 77 ASP 78 LYS 79 LEU 80 LEU 81 ASP 82 ASP 83 GLU 84 LEU 85 ASP 86 ASP 87 ASP 88 ILE 89 ALA 90 CYS 91 ALA 92 LYS 93 LYS 94 ILE 95 LEU 96 ALA 97 ILE 98 LYS 99 GLY 100 ILE 101 ASP 102 TYR 103 TRP 104 LYS 105 ALA 106 TYR 107 LYS 108 PRO 109 MET 110 CYS 111 SER 112 GLU 113 LYS 114 LEU 115 GLU 116 GLN 117 TRP 118 ARG 119 CYS 120 GLU 121 LYS 122 PRO 123
Unit 4	LEU 131 THR 132 ALA 133 CYS 134 PRO 135 GLU 136 GLU 137 SER 138 PRO 139 LEU 140 LEU 141 VAL 142 GLY 143 PRO 144 MET 145 LEU 146 ILE 147 GLU 148 PHE 149 ASN 150 ILE 151 PRO 152 VAL 153 ASP 154 LEU 155 LYS 156 LEU 157 VAL 158 GLU 159 GLN 160 GLN 161 ASN 162 PRO 163 LYS 164 VAL 165 LYS 166 LEU 167 GLY 168 GLY 169 ARG 170 TYR 171 THR 172 PRO 173 MET 174 ASP 175 CYS 176 ILE 177 SER 178 PRO 179 HIS 180 LYS 181 VAL 182 ALA 183 ILE 184 ILE 185 ILE 186 PRO 187 PHE 188 ARG 189 ASN 190 ARG 191 GLN 192 GLU 193 HIS 194 LEU 195 LYS 196 TYR 197 TRP 198 LEU 199 TYR 200 TYR 201 LEU 202 HIS 203 PRO 204 ILE 205 LEU 206 GLN 207 ARG 208 GLN 209 GLN 210 LEU 211 ASP 212 TYR 213 GLY 214 ILE 215 TYR 216 VAL 217 ILE 218 ASN 219 GLN 220 ALA 221 GLY 222 GLU 223 SER 224 MET 225 PHE 226 ASN 227 ARG 228 ALA 229 LYS 230 LEU 231 LEU 232 ASN 233 VAL 234 GLY 235 PHE 236 LYS 237 GLU 238 ALA 239 LEU 240 LYS 241 ASP 242 TYR 243 ASP 244 TYR 245 ASN 246 CYS 247 PHE 248 VAL 249 PHE 250 SER 251 ASP 252 VAL 253 ASP 254 LEU 255 ILE 256 PRO 257 MET 258 ASN 259 ASP 260 HIS 261 ASN 262 THR 263 TYR 264 ARG 265 CYS 266 PHE 267 SER 268 GLN 269 PRO 270 ARG 271 HIS 272 ILE 273 SER 274 VAL 275 ALA 276 MET 277 ASP 278 LYS 279 PHE 280 GLY 281 PHE 282 SER 283 LEU 284 PRO 285 TYR 286 VAL 287 GLN 288 TYR 289 PHE 290 GLY 291 GLY 292 VAL 293 SER 294 ALA 295 LEU 296 SER 297 LYS 298 GLN 299 GLN 300 PHE 301 LEU 302 SER 303 ILE 304 ASN 305 GLY 306 PHE 307 PRO 308 ASN 309 ASN 310 TYR 311 TRP 312 GLY 313 TRP 314 GLY 315 GLY 316 GLU 317 ASP 318 ASP 319 ASP 320 ILE 321 TYR 322 ASN 323 ARG 324 LEU 325 ALA 326 PHE 327 ARG 328 GLY 329 MET 330 SER 331 VAL 332 SER 333 ARG 334 PRO 335 ASN 336 ALA 337 VAL 338 ILE 339 GLY 340 LYS 341 CYS 342 ARG 343 MET 344 ILE 345 ARG 346 HIS 347 SER 348 ARG 349 ASP 350 LYS 351 LYS 352 ASN 353 GLU 354 PRO 355 ASN 356 PRO 357 GLN 358 ARG 359 PHE 360 ASP 361 ARG 362 ILE 363 ALA 364 HIS 365 THR 366 LYS 367 GLU 368 THR 369 MET 370 LEU 371 SER 372 ASP 373 GLY 374 LEU 375 ASN 376 SER 377 LEU 378 THR 379 TYR 380 MET 381 VAL 382 LEU 383 GLU 384 VAL 385 GLN 386 ARG 387 TYR 388 PRO 389 LEU 390 TYR 391 THR 392 LYS 393 ILE 394 THR 395 VAL 396 ASP 397 ILE 398 GLY 399 THR 400 PRO 401 SER 402

Ligands

Unit 5	CA 124
Unit 6	NAG 403
Unit 7	CA 526
Unit 8	NAG 527