1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 0.00000 0.00000 0.00000 0000-0001-5421-6112 Liaci, A.M. 0009-0006-5724-1771 Vismpas, D. 0000-0002-3077-9014 Skalidis, I. 0000-0001-6682-4449 Koh, F.A. 0000-0002-4480-5439 Abhay, K. 0000-0002-6044-2746 Forster, G.F. http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic 90.00 90.00 90.00 1.00 1.00 1.00 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 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 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 N N 159 S C N 160 N C N 161 N O N 162 S C N 163 N C N 164 N C N 165 N C N 166 N O N 167 N H N 168 N H N 169 N H 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 N N 181 S C N 182 N C N 183 N O N 184 N C N 185 N C N 186 N C N 187 N C N 188 N O N 189 N H N 190 N H N 191 N H 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 N N 203 S C N 204 N C N 205 N O N 206 N C N 207 N C N 208 N C N 209 N C N 210 N N N 211 N O N 212 N H N 213 N H N 214 N H 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 N N 228 S C N 229 N C N 230 N O N 231 N C N 232 N C N 233 N S N 234 N C N 235 N O N 236 N H N 237 N H N 238 N H 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 N N 248 S C N 249 N C N 250 N O N 251 N C Y 252 N C Y 253 N C Y 254 N C Y 255 N C Y 256 N C Y 257 N C N 258 N O N 259 N H N 260 N H N 261 N H N 262 N H 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 N C N 275 N C 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 N 292 N O N 293 N O 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 N N 302 S C N 303 N C N 304 N O N 305 R C N 306 N O N 307 N C N 308 N O N 309 N H N 310 N H 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 N N 319 S C N 320 N C N 321 N O N 322 N C Y 323 N C Y 324 N C Y 325 N C Y 326 N N Y 327 N C Y 328 N C Y 329 N C Y 330 N C Y 331 N C N 332 N O N 333 N H N 334 N H N 335 N H N 336 N H N 337 N H N 338 N H N 339 N H N 340 N H N 341 N H N 342 N H N 343 N H N 344 N H N 345 N N N 346 S C N 347 N C N 348 N O N 349 N C Y 350 N C Y 351 N C Y 352 N C Y 353 N C Y 354 N C Y 355 N C N 356 N O N 357 N O N 358 N H N 359 N H N 360 N H N 361 N H N 362 N H N 363 N H N 364 N H N 365 N H N 366 N H N 367 N H N 368 N H N 369 N N N 370 S C N 371 N C N 372 N O N 373 N C N 374 N C N 375 N C N 376 N O N 377 N H N 378 N H N 379 N H N 380 N H N 381 N H N 382 N H N 383 N H N 384 N H N 385 N H N 386 N H N 387 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 doub 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 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 doub 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 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 doub 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 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 doub N 223 N sing N 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 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 doub N 242 N sing N 243 N sing N 244 N sing N 245 N sing Y 246 N doub Y 247 N sing Y 248 N sing N 249 N sing Y 250 N doub N 251 N sing Y 252 N doub N 253 N sing Y 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 sing N 281 N doub N 282 N sing N 283 N sing N 284 N sing N 285 N sing N 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 doub N 295 N sing N 296 N sing 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 doub N 311 N sing N 312 N sing N 313 N sing N 314 N sing Y 315 N doub Y 316 N sing Y 317 N sing N 318 N sing Y 319 N doub Y 320 N sing Y 321 N sing N 322 N sing Y 323 N sing Y 324 N doub N 325 N sing Y 326 N doub N 327 N sing Y 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 doub N 339 N sing N 340 N sing N 341 N sing N 342 N sing Y 343 N doub Y 344 N sing Y 345 N sing N 346 N sing Y 347 N doub N 348 N sing Y 349 N doub N 350 N sing Y 351 N sing N 352 N sing N 353 N sing N 354 N sing N 355 N sing N 356 N sing N 357 N sing N 358 N sing N 359 N sing N 360 N sing N 361 N sing N 362 N doub 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 sing N 371 N sing N 372 N sing N 373 N sing UK Nat Commun 0353 2041-1723 10.1038/s41467-026-73423-3 Structure of the human signal peptidase complex with a signal peptide 2026 0000-0001-5421-6112 0009-0006-5724-1771 0000-0003-2834-3411 0000-0002-3077-9014 0000-0002-6277-0006 0000-0001-6682-4449 0009-0004-8793-0880 0000-0002-4480-5439 0000-0003-0660-1301 0000-0002-6044-2746 10.2210/pdb9rjc/pdb pdb_00009rjc FLEXIBLE FIT REAL 7P2P PDB 1 7P2P PDB experimental model SIMULTANEOUS ITERATIVE (SIRT) 9RJC 1 516615 4.2 FSC 0.143 CUT-OFF POINT REL 2025-06-12 PDBE 2026-05-27 2026-05-27 Apo Structure of the Human Signal Peptidase addition of 1.5 mM fluorinated, fos-choline (FFosC, Anatrace) directly before vitrification 7.8 10 mM HEPES 85 mM NaCl sodium chloride 0.0174 % DDM CHS 1 mM EDTA 1 PHASE FLIPPING AND AMPLITUDE CORRECTION 3,1,4,2 Apo Structure of the Human Signal Peptidase Complex 0 RECOMBINANT COMPLEX NO MEGADALTONS 0.09334 9606 Homo sapiens HEK 293 9606 Homo sapiens PARTICLE 1 1 SINGLE PARTICLE 60 FEI FALCON IV (4k x 4k) 1 6537 300 COMA FREE FIELD EMISSION GUN FLOOD BEAM TFS KRIOS BRIGHT FIELD 1200 800 1 2457714 COPPER 200 Quantifoil Active R2/1 PARTICLE SELECTION 1 cryoSPARC 3.3.1 IMAGE ACQUISITION 1 EPU 3.1 MASKING CTF CORRECTION 1 cryoSPARC 3.3.1 LAYERLINE INDEXING DIFFRACTION INDEXING MODEL FITTING 1 Coot 0.9.8.3 OTHER MODEL REFINEMENT 1 PHENIX 1.20.1_4487 INITIAL EULER ASSIGNMENT ab initio 1 cryoSPARC 3.3.1 FINAL EULER ASSIGNMENT homogeneous refinement 1 cryoSPARC 3.3.1 CLASSIFICATION non uniform refinement 1 cryoSPARC 3.3.1 RECONSTRUCTION 1 cryoSPARC 3.3.1 VOLUME SELECTION 1 1 1 SERIES ALIGNMENT 1 1 1 MOLECULAR REPLACEMENT 1 1 1 LATTICE DISTORTION CORRECTION 1 1 1 SYMMETRY DETERMINATION 1 1 1 CRYSTALLOGRAPHY MERGING 1 1 1 4 NO NO NO YES 277 ETHANE-PROPANE 9RJC 100 FEI VITROBOT MARK IV 20394.979 Signal peptidase complex catalytic subunit SEC11A 3.4.21.89 1 man polymer 7386.763 Signal peptidase complex subunit 1 1 man polymer 20338.516 Signal peptidase complex subunit 2 1 man polymer 19611.531 Signal peptidase complex subunit 3 1 man polymer Endopeptidase SP18,Microsomal signal peptidase 18 kDa subunit,SPase 18 kDa subunit,SEC11 homolog A,SEC11-like protein 1,SPC18 Microsomal signal peptidase 12 kDa subunit,SPase 12 kDa subunit Microsomal signal peptidase 25 kDa subunit,SPase 25 kDa subunit Microsomal signal peptidase 22/23 kDa subunit,SPC22/23,SPase 22/23 kDa subunit no no SLDFLDDVRRMNKRQLYYQVLNFGMIVSSALMIWKGLMVITGSESPIVVVLSGAMEPAFHRGDLLFLTNRVEDPIRVGEI VVFRIEGREIPIVHRVLKIHEKQNGHIKFLTKGDNNAVDDRGLYKQGQHWLEKKDVVGRARGFVPYIGIVTILMNDYPKF KYAVLFLLGLFVLVHRE SLDFLDDVRRMNKRQLYYQVLNFGMIVSSALMIWKGLMVITGSESPIVVVLSGAMEPAFHRGDLLFLTNRVEDPIRVGEI VVFRIEGREIPIVHRVLKIHEKQNGHIKFLTKGDNNAVDDRGLYKQGQHWLEKKDVVGRARGFVPYIGIVTILMNDYPKF KYAVLFLLGLFVLVHRE A polypeptide(L) no no GQKLAEQMFQGIILFSAIVGFIYGYVAEQFGWTVYIVMAGFAFSCLLTLPPWPIYRRHPLKWLP GQKLAEQMFQGIILFSAIVGFIYGYVAEQFGWTVYIVMAGFAFSCLLTLPPWPIYRRHPLKWLP B polypeptide(L) no no DPVKIDKWDGSAVKNSLDDSAKKVLLEKYKYVENFGLIDGRLTICTISCFFAIVALIWDYMHPFPESKPVLALCVISYFV MMGILTIYTSYKEKSIFLVAHRKDPTGMDPDDIWQLSSSLKRFDDKYTLKLTFISGRTKQQREAEFTKSIAKFFDHSGTL VMDAYEPEISRLHDSLA DPVKIDKWDGSAVKNSLDDSAKKVLLEKYKYVENFGLIDGRLTICTISCFFAIVALIWDYMHPFPESKPVLALCVISYFV MMGILTIYTSYKEKSIFLVAHRKDPTGMDPDDIWQLSSSLKRFDDKYTLKLTFISGRTKQQREAEFTKSIAKFFDHSGTL VMDAYEPEISRLHDSLA C polypeptide(L) no no MNTVLSRANSLFAFSLSVMAALTFGCFITTAFKDRSVPVRLHVSRIMLKNVEDFTGPRERSDLGFITFDITADLENIFDW NVKQLFLYLSAEYSTKNNALNQVVLWDKIVLRGDNPKLLLKDMKTKYFFFDDGNGLKGNRNVTLTLSWNVVPNAGILPLV TGSGHVSVPFPDTY MNTVLSRANSLFAFSLSVMAALTFGCFITTAFKDRSVPVRLHVSRIMLKNVEDFTGPRERSDLGFITFDITADLENIFDW NVKQLFLYLSAEYSTKNNALNQVVLWDKIVLRGDNPKLLLKDMKTKYFFFDDGNGLKGNRNVTLTLSWNVVPNAGILPLV TGSGHVSVPFPDTY D 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 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 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 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 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 sample 1 177 SEC11A, SEC11L1, SPC18, SPCS4A 9606 Homo sapiens 9606 Homo sapiens Biological sequence human sample 1 64 SPCS1, SPC12, HSPC033 9606 Homo sapiens 9606 Homo sapiens Biological sequence human sample 1 177 SPCS2, KIAA0102, SPC25 9606 Homo sapiens 9606 Homo sapiens Biological sequence human sample 1 174 SPCS3, SPC22, UNQ1841/PRO3567 9606 Homo sapiens 9606 Homo sapiens Biological sequence repository Initial release repository Initial release repository Initial release repository Initial release repository Initial release repository Initial release repository Initial release repository Initial release 1 0 2026-05-27 1 0 2026-05-27 1 0 2026-05-27 1 0 1 2026-05-27 1 0 2 2026-05-27 1 0 2026-05-27 1 0 1 2026-05-27 1 0 2026-05-27 Netherlands Netherlands Organisation for Scientific Research (NWO) OCENW.M.22.151 Netherlands Netherlands Organisation for Scientific Research (NWO) 184.034.014 f.g.forster@uu.nl 0000-0002-6044-2746 Friedrich Forster G principal investigator/group leader Apo Structure of the Human Signal Peptidase N PDBE N PDBE 2025-06-12 REL N 7P2P PDB experimental model n 1 3 A n 2 4 A n 3 5 A n 4 6 A n 5 7 A n 6 8 A n 7 9 A n 8 10 A n 9 11 A n 10 12 A n 11 13 A n 12 14 A n 13 15 A ARG 16 n 14 ARG 16 A GLN 17 n 15 GLN 17 A LEU 18 n 16 LEU 18 A TYR 19 n 17 TYR 19 A TYR 20 n 18 TYR 20 A GLN 21 n 19 GLN 21 A VAL 22 n 20 VAL 22 A LEU 23 n 21 LEU 23 A ASN 24 n 22 ASN 24 A PHE 25 n 23 PHE 25 A GLY 26 n 24 GLY 26 A MET 27 n 25 MET 27 A ILE 28 n 26 ILE 28 A VAL 29 n 27 VAL 29 A SER 30 n 28 SER 30 A SER 31 n 29 SER 31 A ALA 32 n 30 ALA 32 A LEU 33 n 31 LEU 33 A MET 34 n 32 MET 34 A ILE 35 n 33 ILE 35 A TRP 36 n 34 TRP 36 A LYS 37 n 35 LYS 37 A GLY 38 n 36 GLY 38 A LEU 39 n 37 LEU 39 A MET 40 n 38 MET 40 A VAL 41 n 39 VAL 41 A ILE 42 n 40 ILE 42 A THR 43 n 41 THR 43 A GLY 44 n 42 GLY 44 A SER 45 n 43 SER 45 A GLU 46 n 44 GLU 46 A SER 47 n 45 SER 47 A PRO 48 n 46 PRO 48 A ILE 49 n 47 ILE 49 A VAL 50 n 48 VAL 50 A VAL 51 n 49 VAL 51 A VAL 52 n 50 VAL 52 A LEU 53 n 51 LEU 53 A SER 54 n 52 SER 54 A GLY 55 n 53 GLY 55 A ALA 56 n 54 ALA 56 A MET 57 n 55 MET 57 A GLU 58 n 56 GLU 58 A PRO 59 n 57 PRO 59 A ALA 60 n 58 ALA 60 A PHE 61 n 59 PHE 61 A HIS 62 n 60 HIS 62 A ARG 63 n 61 ARG 63 A GLY 64 n 62 GLY 64 A ASP 65 n 63 ASP 65 A LEU 66 n 64 LEU 66 A LEU 67 n 65 LEU 67 A PHE 68 n 66 PHE 68 A LEU 69 n 67 LEU 69 A THR 70 n 68 THR 70 A ASN 71 n 69 ASN 71 A ARG 72 n 70 ARG 72 A VAL 73 n 71 VAL 73 A GLU 74 n 72 GLU 74 A ASP 75 n 73 ASP 75 A PRO 76 n 74 PRO 76 A ILE 77 n 75 ILE 77 A ARG 78 n 76 ARG 78 A VAL 79 n 77 VAL 79 A GLY 80 n 78 GLY 80 A GLU 81 n 79 GLU 81 A ILE 82 n 80 ILE 82 A VAL 83 n 81 VAL 83 A VAL 84 n 82 VAL 84 A PHE 85 n 83 PHE 85 A ARG 86 n 84 ARG 86 A ILE 87 n 85 ILE 87 A n 86 88 A n 87 89 A n 88 90 A n 89 91 A ILE 92 n 90 ILE 92 A PRO 93 n 91 PRO 93 A ILE 94 n 92 ILE 94 A VAL 95 n 93 VAL 95 A HIS 96 n 94 HIS 96 A ARG 97 n 95 ARG 97 A VAL 98 n 96 VAL 98 A LEU 99 n 97 LEU 99 A LYS 100 n 98 LYS 100 A ILE 101 n 99 ILE 101 A HIS 102 n 100 HIS 102 A GLU 103 n 101 GLU 103 A LYS 104 n 102 LYS 104 A GLN 105 n 103 GLN 105 A ASN 106 n 104 ASN 106 A GLY 107 n 105 GLY 107 A HIS 108 n 106 HIS 108 A ILE 109 n 107 ILE 109 A LYS 110 n 108 LYS 110 A PHE 111 n 109 PHE 111 A LEU 112 n 110 LEU 112 A THR 113 n 111 THR 113 A LYS 114 n 112 LYS 114 A GLY 115 n 113 GLY 115 A ASP 116 n 114 ASP 116 A ASN 117 n 115 ASN 117 A ASN 118 n 116 ASN 118 A ALA 119 n 117 ALA 119 A VAL 120 n 118 VAL 120 A ASP 121 n 119 ASP 121 A ASP 122 n 120 ASP 122 A ARG 123 n 121 ARG 123 A GLY 124 n 122 GLY 124 A LEU 125 n 123 LEU 125 A TYR 126 n 124 TYR 126 A LYS 127 n 125 LYS 127 A GLN 128 n 126 GLN 128 A GLY 129 n 127 GLY 129 A GLN 130 n 128 GLN 130 A HIS 131 n 129 HIS 131 A TRP 132 n 130 TRP 132 A LEU 133 n 131 LEU 133 A GLU 134 n 132 GLU 134 A LYS 135 n 133 LYS 135 A LYS 136 n 134 LYS 136 A ASP 137 n 135 ASP 137 A VAL 138 n 136 VAL 138 A VAL 139 n 137 VAL 139 A GLY 140 n 138 GLY 140 A ARG 141 n 139 ARG 141 A ALA 142 n 140 ALA 142 A ARG 143 n 141 ARG 143 A GLY 144 n 142 GLY 144 A PHE 145 n 143 PHE 145 A VAL 146 n 144 VAL 146 A PRO 147 n 145 PRO 147 A TYR 148 n 146 TYR 148 A ILE 149 n 147 ILE 149 A GLY 150 n 148 GLY 150 A ILE 151 n 149 ILE 151 A VAL 152 n 150 VAL 152 A THR 153 n 151 THR 153 A ILE 154 n 152 ILE 154 A LEU 155 n 153 LEU 155 A MET 156 n 154 MET 156 A ASN 157 n 155 ASN 157 A ASP 158 n 156 ASP 158 A TYR 159 n 157 TYR 159 A n 158 160 A n 159 161 A n 160 162 A n 161 163 A n 162 164 A n 163 165 A n 164 166 A n 165 167 A n 166 168 A n 167 169 A n 168 170 A n 169 171 A n 170 172 A n 171 173 A n 172 174 A n 173 175 A n 174 176 A n 175 177 A n 176 178 A n 177 179 A GLY 83 n 1 GLY 83 B GLN 84 n 2 GLN 84 B LYS 85 n 3 LYS 85 B LEU 86 n 4 LEU 86 B ALA 87 n 5 ALA 87 B GLU 88 n 6 GLU 88 B GLN 89 n 7 GLN 89 B MET 90 n 8 MET 90 B PHE 91 n 9 PHE 91 B GLN 92 n 10 GLN 92 B GLY 93 n 11 GLY 93 B ILE 94 n 12 ILE 94 B ILE 95 n 13 ILE 95 B LEU 96 n 14 LEU 96 B PHE 97 n 15 PHE 97 B SER 98 n 16 SER 98 B ALA 99 n 17 ALA 99 B ILE 100 n 18 ILE 100 B VAL 101 n 19 VAL 101 B GLY 102 n 20 GLY 102 B PHE 103 n 21 PHE 103 B ILE 104 n 22 ILE 104 B TYR 105 n 23 TYR 105 B GLY 106 n 24 GLY 106 B TYR 107 n 25 TYR 107 B VAL 108 n 26 VAL 108 B ALA 109 n 27 ALA 109 B GLU 110 n 28 GLU 110 B GLN 111 n 29 GLN 111 B PHE 112 n 30 PHE 112 B GLY 113 n 31 GLY 113 B TRP 114 n 32 TRP 114 B THR 115 n 33 THR 115 B VAL 116 n 34 VAL 116 B TYR 117 n 35 TYR 117 B ILE 118 n 36 ILE 118 B VAL 119 n 37 VAL 119 B MET 120 n 38 MET 120 B ALA 121 n 39 ALA 121 B GLY 122 n 40 GLY 122 B PHE 123 n 41 PHE 123 B ALA 124 n 42 ALA 124 B PHE 125 n 43 PHE 125 B SER 126 n 44 SER 126 B CYS 127 n 45 CYS 127 B LEU 128 n 46 LEU 128 B LEU 129 n 47 LEU 129 B THR 130 n 48 THR 130 B LEU 131 n 49 LEU 131 B PRO 132 n 50 PRO 132 B PRO 133 n 51 PRO 133 B TRP 134 n 52 TRP 134 B PRO 135 n 53 PRO 135 B ILE 136 n 54 ILE 136 B TYR 137 n 55 TYR 137 B ARG 138 n 56 ARG 138 B ARG 139 n 57 ARG 139 B HIS 140 n 58 HIS 140 B PRO 141 n 59 PRO 141 B LEU 142 n 60 LEU 142 B LYS 143 n 61 LYS 143 B TRP 144 n 62 TRP 144 B LEU 145 n 63 LEU 145 B PRO 146 n 64 PRO 146 B ASP 42 n 1 ASP 42 C n 2 44 C n 3 45 C LYS 46 n 4 LYS 46 C ILE 47 n 5 ILE 47 C ASP 48 n 6 ASP 48 C LYS 49 n 7 LYS 49 C TRP 50 n 8 TRP 50 C ASP 51 n 9 ASP 51 C GLY 52 n 10 GLY 52 C SER 53 n 11 SER 53 C ALA 54 n 12 ALA 54 C VAL 55 n 13 VAL 55 C LYS 56 n 14 LYS 56 C ASN 57 n 15 ASN 57 C SER 58 n 16 SER 58 C LEU 59 n 17 LEU 59 C ASP 60 n 18 ASP 60 C ASP 61 n 19 ASP 61 C SER 62 n 20 SER 62 C ALA 63 n 21 ALA 63 C LYS 64 n 22 LYS 64 C LYS 65 n 23 LYS 65 C VAL 66 n 24 VAL 66 C LEU 67 n 25 LEU 67 C LEU 68 n 26 LEU 68 C GLU 69 n 27 GLU 69 C LYS 70 n 28 LYS 70 C TYR 71 n 29 TYR 71 C LYS 72 n 30 LYS 72 C TYR 73 n 31 TYR 73 C VAL 74 n 32 VAL 74 C GLU 75 n 33 GLU 75 C ASN 76 n 34 ASN 76 C PHE 77 n 35 PHE 77 C GLY 78 n 36 GLY 78 C LEU 79 n 37 LEU 79 C ILE 80 n 38 ILE 80 C ASP 81 n 39 ASP 81 C GLY 82 n 40 GLY 82 C ARG 83 n 41 ARG 83 C LEU 84 n 42 LEU 84 C THR 85 n 43 THR 85 C ILE 86 n 44 ILE 86 C CYS 87 n 45 CYS 87 C THR 88 n 46 THR 88 C ILE 89 n 47 ILE 89 C SER 90 n 48 SER 90 C CYS 91 n 49 CYS 91 C PHE 92 n 50 PHE 92 C PHE 93 n 51 PHE 93 C ALA 94 n 52 ALA 94 C ILE 95 n 53 ILE 95 C VAL 96 n 54 VAL 96 C ALA 97 n 55 ALA 97 C LEU 98 n 56 LEU 98 C ILE 99 n 57 ILE 99 C TRP 100 n 58 TRP 100 C ASP 101 n 59 ASP 101 C TYR 102 n 60 TYR 102 C MET 103 n 61 MET 103 C HIS 104 n 62 HIS 104 C PRO 105 n 63 PRO 105 C PHE 106 n 64 PHE 106 C PRO 107 n 65 PRO 107 C GLU 108 n 66 GLU 108 C SER 109 n 67 SER 109 C LYS 110 n 68 LYS 110 C PRO 111 n 69 PRO 111 C VAL 112 n 70 VAL 112 C LEU 113 n 71 LEU 113 C ALA 114 n 72 ALA 114 C LEU 115 n 73 LEU 115 C CYS 116 n 74 CYS 116 C VAL 117 n 75 VAL 117 C ILE 118 n 76 ILE 118 C SER 119 n 77 SER 119 C TYR 120 n 78 TYR 120 C PHE 121 n 79 PHE 121 C VAL 122 n 80 VAL 122 C MET 123 n 81 MET 123 C MET 124 n 82 MET 124 C GLY 125 n 83 GLY 125 C ILE 126 n 84 ILE 126 C LEU 127 n 85 LEU 127 C THR 128 n 86 THR 128 C ILE 129 n 87 ILE 129 C TYR 130 n 88 TYR 130 C THR 131 n 89 THR 131 C SER 132 n 90 SER 132 C TYR 133 n 91 TYR 133 C LYS 134 n 92 LYS 134 C GLU 135 n 93 GLU 135 C LYS 136 n 94 LYS 136 C SER 137 n 95 SER 137 C ILE 138 n 96 ILE 138 C PHE 139 n 97 PHE 139 C LEU 140 n 98 LEU 140 C VAL 141 n 99 VAL 141 C ALA 142 n 100 ALA 142 C HIS 143 n 101 HIS 143 C ARG 144 n 102 ARG 144 C LYS 145 n 103 LYS 145 C ASP 146 n 104 ASP 146 C n 105 147 C n 106 148 C n 107 149 C n 108 150 C n 109 151 C n 110 152 C ASP 153 n 111 ASP 153 C ASP 154 n 112 ASP 154 C ILE 155 n 113 ILE 155 C TRP 156 n 114 TRP 156 C GLN 157 n 115 GLN 157 C LEU 158 n 116 LEU 158 C SER 159 n 117 SER 159 C SER 160 n 118 SER 160 C SER 161 n 119 SER 161 C LEU 162 n 120 LEU 162 C LYS 163 n 121 LYS 163 C ARG 164 n 122 ARG 164 C PHE 165 n 123 PHE 165 C ASP 166 n 124 ASP 166 C ASP 167 n 125 ASP 167 C LYS 168 n 126 LYS 168 C TYR 169 n 127 TYR 169 C THR 170 n 128 THR 170 C LEU 171 n 129 LEU 171 C LYS 172 n 130 LYS 172 C LEU 173 n 131 LEU 173 C THR 174 n 132 THR 174 C PHE 175 n 133 PHE 175 C ILE 176 n 134 ILE 176 C SER 177 n 135 SER 177 C n 136 178 C n 137 179 C n 138 180 C n 139 181 C n 140 182 C GLN 183 n 141 GLN 183 C ARG 184 n 142 ARG 184 C GLU 185 n 143 GLU 185 C ALA 186 n 144 ALA 186 C GLU 187 n 145 GLU 187 C PHE 188 n 146 PHE 188 C THR 189 n 147 THR 189 C LYS 190 n 148 LYS 190 C SER 191 n 149 SER 191 C ILE 192 n 150 ILE 192 C ALA 193 n 151 ALA 193 C LYS 194 n 152 LYS 194 C PHE 195 n 153 PHE 195 C PHE 196 n 154 PHE 196 C ASP 197 n 155 ASP 197 C HIS 198 n 156 HIS 198 C SER 199 n 157 SER 199 C GLY 200 n 158 GLY 200 C THR 201 n 159 THR 201 C LEU 202 n 160 LEU 202 C VAL 203 n 161 VAL 203 C MET 204 n 162 MET 204 C ASP 205 n 163 ASP 205 C ALA 206 n 164 ALA 206 C TYR 207 n 165 TYR 207 C GLU 208 n 166 GLU 208 C PRO 209 n 167 PRO 209 C GLU 210 n 168 GLU 210 C ILE 211 n 169 ILE 211 C SER 212 n 170 SER 212 C ARG 213 n 171 ARG 213 C LEU 214 n 172 LEU 214 C HIS 215 n 173 HIS 215 C ASP 216 n 174 ASP 216 C SER 217 n 175 SER 217 C LEU 218 n 176 LEU 218 C ALA 219 n 177 ALA 219 C MET 1 n 1 MET 1 D ASN 2 n 2 ASN 2 D THR 3 n 3 THR 3 D VAL 4 n 4 VAL 4 D LEU 5 n 5 LEU 5 D SER 6 n 6 SER 6 D ARG 7 n 7 ARG 7 D ALA 8 n 8 ALA 8 D ASN 9 n 9 ASN 9 D SER 10 n 10 SER 10 D LEU 11 n 11 LEU 11 D PHE 12 n 12 PHE 12 D ALA 13 n 13 ALA 13 D PHE 14 n 14 PHE 14 D SER 15 n 15 SER 15 D LEU 16 n 16 LEU 16 D SER 17 n 17 SER 17 D VAL 18 n 18 VAL 18 D MET 19 n 19 MET 19 D ALA 20 n 20 ALA 20 D ALA 21 n 21 ALA 21 D LEU 22 n 22 LEU 22 D THR 23 n 23 THR 23 D PHE 24 n 24 PHE 24 D GLY 25 n 25 GLY 25 D CYS 26 n 26 CYS 26 D PHE 27 n 27 PHE 27 D ILE 28 n 28 ILE 28 D THR 29 n 29 THR 29 D THR 30 n 30 THR 30 D ALA 31 n 31 ALA 31 D PHE 32 n 32 PHE 32 D LYS 33 n 33 LYS 33 D ASP 34 n 34 ASP 34 D ARG 35 n 35 ARG 35 D SER 36 n 36 SER 36 D VAL 37 n 37 VAL 37 D PRO 38 n 38 PRO 38 D VAL 39 n 39 VAL 39 D ARG 40 n 40 ARG 40 D LEU 41 n 41 LEU 41 D HIS 42 n 42 HIS 42 D VAL 43 n 43 VAL 43 D SER 44 n 44 SER 44 D ARG 45 n 45 ARG 45 D ILE 46 n 46 ILE 46 D MET 47 n 47 MET 47 D LEU 48 n 48 LEU 48 D LYS 49 n 49 LYS 49 D ASN 50 n 50 ASN 50 D VAL 51 n 51 VAL 51 D n 52 52 D n 53 53 D n 54 54 D n 55 55 D n 56 56 D n 57 57 D n 58 58 D n 59 59 D ARG 60 n 60 ARG 60 D SER 61 n 61 SER 61 D ASP 62 n 62 ASP 62 D LEU 63 n 63 LEU 63 D GLY 64 n 64 GLY 64 D PHE 65 n 65 PHE 65 D ILE 66 n 66 ILE 66 D THR 67 n 67 THR 67 D PHE 68 n 68 PHE 68 D ASP 69 n 69 ASP 69 D ILE 70 n 70 ILE 70 D THR 71 n 71 THR 71 D ALA 72 n 72 ALA 72 D ASP 73 n 73 ASP 73 D LEU 74 n 74 LEU 74 D GLU 75 n 75 GLU 75 D ASN 76 n 76 ASN 76 D ILE 77 n 77 ILE 77 D PHE 78 n 78 PHE 78 D ASP 79 n 79 ASP 79 D TRP 80 n 80 TRP 80 D ASN 81 n 81 ASN 81 D VAL 82 n 82 VAL 82 D LYS 83 n 83 LYS 83 D GLN 84 n 84 GLN 84 D LEU 85 n 85 LEU 85 D PHE 86 n 86 PHE 86 D LEU 87 n 87 LEU 87 D TYR 88 n 88 TYR 88 D LEU 89 n 89 LEU 89 D SER 90 n 90 SER 90 D ALA 91 n 91 ALA 91 D GLU 92 n 92 GLU 92 D TYR 93 n 93 TYR 93 D SER 94 n 94 SER 94 D THR 95 n 95 THR 95 D LYS 96 n 96 LYS 96 D ASN 97 n 97 ASN 97 D ASN 98 n 98 ASN 98 D ALA 99 n 99 ALA 99 D LEU 100 n 100 LEU 100 D ASN 101 n 101 ASN 101 D GLN 102 n 102 GLN 102 D VAL 103 n 103 VAL 103 D VAL 104 n 104 VAL 104 D LEU 105 n 105 LEU 105 D TRP 106 n 106 TRP 106 D ASP 107 n 107 ASP 107 D LYS 108 n 108 LYS 108 D ILE 109 n 109 ILE 109 D VAL 110 n 110 VAL 110 D LEU 111 n 111 LEU 111 D ARG 112 n 112 ARG 112 D GLY 113 n 113 GLY 113 D ASP 114 n 114 ASP 114 D ASN 115 n 115 ASN 115 D PRO 116 n 116 PRO 116 D LYS 117 n 117 LYS 117 D LEU 118 n 118 LEU 118 D LEU 119 n 119 LEU 119 D LEU 120 n 120 LEU 120 D LYS 121 n 121 LYS 121 D ASP 122 n 122 ASP 122 D MET 123 n 123 MET 123 D LYS 124 n 124 LYS 124 D THR 125 n 125 THR 125 D LYS 126 n 126 LYS 126 D TYR 127 n 127 TYR 127 D PHE 128 n 128 PHE 128 D PHE 129 n 129 PHE 129 D PHE 130 n 130 PHE 130 D ASP 131 n 131 ASP 131 D ASP 132 n 132 ASP 132 D GLY 133 n 133 GLY 133 D ASN 134 n 134 ASN 134 D GLY 135 n 135 GLY 135 D LEU 136 n 136 LEU 136 D LYS 137 n 137 LYS 137 D GLY 138 n 138 GLY 138 D ASN 139 n 139 ASN 139 D ARG 140 n 140 ARG 140 D ASN 141 n 141 ASN 141 D VAL 142 n 142 VAL 142 D THR 143 n 143 THR 143 D LEU 144 n 144 LEU 144 D THR 145 n 145 THR 145 D LEU 146 n 146 LEU 146 D SER 147 n 147 SER 147 D TRP 148 n 148 TRP 148 D ASN 149 n 149 ASN 149 D VAL 150 n 150 VAL 150 D VAL 151 n 151 VAL 151 D PRO 152 n 152 PRO 152 D ASN 153 n 153 ASN 153 D ALA 154 n 154 ALA 154 D GLY 155 n 155 GLY 155 D ILE 156 n 156 ILE 156 D LEU 157 n 157 LEU 157 D PRO 158 n 158 PRO 158 D LEU 159 n 159 LEU 159 D VAL 160 n 160 VAL 160 D THR 161 n 161 THR 161 D GLY 162 n 162 GLY 162 D SER 163 n 163 SER 163 D GLY 164 n 164 GLY 164 D HIS 165 n 165 HIS 165 D VAL 166 n 166 VAL 166 D SER 167 n 167 SER 167 D VAL 168 n 168 VAL 168 D PRO 169 n 169 PRO 169 D PHE 170 n 170 PHE 170 D PRO 171 n 171 PRO 171 D ASP 172 n 172 ASP 172 D THR 173 n 173 THR 173 D TYR 174 n 174 TYR 174 D author_and_software_defined_assembly 4 tetrameric not applicable electron microscopy 1.0 0.0 0.0 0.0 1.0 0.0 0.0 0.0 1.0 1_555 x,y,z identity operation 0.0 0.0 0.0 A N VAL 50 A N VAL 48 A O LEU 67 A O LEU 65 A N THR 70 A N THR 68 A O ARG 141 A O ARG 139 A N PHE 85 A N PHE 83 A O ILE 94 A O ILE 92 A N ILE 82 A N ILE 80 A O ALA 142 A O ALA 140 A N LEU 99 A N LEU 97 A O LEU 112 A O LEU 110 A N GLU 103 A N GLU 101 D O LEU 100 D O LEU 100 A N PHE 145 A N PHE 143 D O GLY 155 D O GLY 155 D N LEU 89 D N LEU 89 D O LEU 105 D O LEU 105 D N GLU 92 D N GLU 92 D O THR 143 D O THR 143 D N TRP 148 D N TRP 148 D O VAL 160 D O VAL 160 D N LEU 144 D N LEU 144 D O VAL 166 D O VAL 166 C N VAL 74 C N VAL 32 C O HIS 143 C O HIS 101 C N ALA 142 C N ALA 100 C O TRP 156 C O TRP 114 C N ILE 155 C N ILE 113 C O ILE 176 C O ILE 134 C N TYR 169 C N TYR 127 C O LYS 190 C O LYS 148 D N SER 44 D N SER 44 D O THR 67 D O THR 67 D N ILE 70 D N ILE 70 D O LEU 120 D O LEU 120 1 A SER 3 A SER 1 1 Y 1 A LEU 4 A LEU 2 1 Y 1 A ASP 5 A ASP 3 1 Y 1 A PHE 6 A PHE 4 1 Y 1 A LEU 7 A LEU 5 1 Y 1 A ASP 8 A ASP 6 1 Y 1 A ASP 9 A ASP 7 1 Y 1 A VAL 10 A VAL 8 1 Y 1 A ARG 11 A ARG 9 1 Y 1 A ARG 12 A ARG 10 1 Y 1 A MET 13 A MET 11 1 Y 1 A ASN 14 A ASN 12 1 Y 1 A LYS 15 A LYS 13 1 Y 1 A GLU 88 A GLU 86 1 Y 1 A GLY 89 A GLY 87 1 Y 1 A ARG 90 A ARG 88 1 Y 1 A GLU 91 A GLU 89 1 Y 1 A PRO 160 A PRO 158 1 Y 1 A LYS 161 A LYS 159 1 Y 1 A PHE 162 A PHE 160 1 Y 1 A LYS 163 A LYS 161 1 Y 1 A TYR 164 A TYR 162 1 Y 1 A ALA 165 A ALA 163 1 Y 1 A VAL 166 A VAL 164 1 Y 1 A LEU 167 A LEU 165 1 Y 1 A PHE 168 A PHE 166 1 Y 1 A LEU 169 A LEU 167 1 Y 1 A LEU 170 A LEU 168 1 Y 1 A GLY 171 A GLY 169 1 Y 1 A LEU 172 A LEU 170 1 Y 1 A PHE 173 A PHE 171 1 Y 1 A VAL 174 A VAL 172 1 Y 1 A LEU 175 A LEU 173 1 Y 1 A VAL 176 A VAL 174 1 Y 1 A HIS 177 A HIS 175 1 Y 1 A ARG 178 A ARG 176 1 Y 1 A GLU 179 A GLU 177 1 Y 1 C PRO 44 C PRO 2 1 Y 1 C VAL 45 C VAL 3 1 Y 1 C PRO 147 C PRO 105 1 Y 1 C THR 148 C THR 106 1 Y 1 C GLY 149 C GLY 107 1 Y 1 C MET 150 C MET 108 1 Y 1 C ASP 151 C ASP 109 1 Y 1 C PRO 152 C PRO 110 1 Y 1 C GLY 178 C GLY 136 1 Y 1 C ARG 179 C ARG 137 1 Y 1 C THR 180 C THR 138 1 Y 1 C LYS 181 C LYS 139 1 Y 1 C GLN 182 C GLN 140 1 Y 1 D GLU 52 D GLU 52 1 Y 1 D ASP 53 D ASP 53 1 Y 1 D PHE 54 D PHE 54 1 Y 1 D THR 55 D THR 55 1 Y 1 D GLY 56 D GLY 56 1 Y 1 D PRO 57 D PRO 57 1 Y 1 D ARG 58 D ARG 58 1 Y 1 D GLU 59 D GLU 59 1 Y 1 A MET 57 -91.74 49.67 1 A LYS 114 -163.47 117.84 1 B TRP 134 51.47 75.17 1 B PRO 135 -56.15 -9.45 1 C LYS 136 52.91 -142.13 1 D SER 44 -99.88 -60.55 1 D ALA 154 -161.80 113.24 N Apo Structure of the Human Signal Peptidase 1 N N 2 N N 3 N N 4 N N A ARG 16 A ARG 14 HELX_P A GLY 44 A GLY 42 1 AA1 29 A GLU 134 A GLU 132 HELX_P A LYS 136 A LYS 134 5 AA2 3 A GLY 150 A GLY 148 HELX_P A TYR 159 A TYR 157 1 AA3 10 B GLN 84 B GLN 2 HELX_P B GLU 110 B GLU 28 1 AA4 27 B PHE 112 B PHE 30 HELX_P B LEU 131 B LEU 49 1 AA5 20 C GLY 52 C GLY 10 HELX_P C TYR 71 C TYR 29 1 AA6 20 C PHE 77 C PHE 35 HELX_P C HIS 104 C HIS 62 1 AA7 28 C PRO 105 C PRO 63 HELX_P C LYS 134 C LYS 92 1 AA8 30 C ALA 193 C ALA 151 HELX_P C PHE 195 C PHE 153 5 AA9 3 C VAL 203 C VAL 161 HELX_P C ALA 219 C ALA 177 1 AB1 17 D THR 3 D THR 3 HELX_P D THR 30 D THR 30 1 AB2 28 MEMBRANE PROTEIN Signal Peptidase Complex, protein biogenesis, secretory pathway, membrane thinning, MEMBRANE PROTEIN A GLU 58 A GLU 56 1 A PRO 59 A PRO 57 4.93 SC11A_HUMAN UNP 1 3 P67812 SLDFLDDVRRMNKRQLYYQVLNFGMIVSSALMIWKGLMVITGSESPIVVVLSGSMEPAFHRGDLLFLTNRVEDPIRVGEI VVFRIEGREIPIVHRVLKIHEKQNGHIKFLTKGDNNAVDDRGLYKQGQHWLEKKDVVGRARGFVPYIGIVTILMNDYPKF KYAVLFLLGLFVLVHRE SPCS1_HUMAN UNP 2 83 Q9Y6A9 GQKLAEQMFQGIILFSAIVGFIYGYVAEQFGWTVYIVMAGFAFSCLLTLPPWPIYRRHPLKWLP SPCS2_HUMAN UNP 3 45 Q15005 PVKIDKWDGSAVKNSLDDSAKKVLLEKYKYVENFGLIDGRLTICTISCFFAIVALIWDYMHPFPESKPVLALCVISYFVM MGILTIYTSYKEKSIFLVAHRKDPTGMDPDDIWQLSSSLKRFDDKYTLKLTFISGRTKQQREAEFTKSIAKFFDHSGTLV MDAYEPEISRLHDSLA SPCS3_HUMAN UNP 4 1 P61009 MNTVLSRANSLFAFSLSVMAALTFGCFITTAFKDRSVPVRLHVSRIMLKNVEDFTGPRERSDLGFITFDITADLENIFDW NVKQLFLYLSAEYSTKNNALNQVVLWDKIVLRGDNPKLLLKDMKTKYFFFDDGNGLKGNRNVTLTLSWNVVPNAGILPLV TGSGHVSVPFPDTY 3 179 9RJC 3 179 P67812 A 1 1 177 83 146 9RJC 83 146 Q9Y6A9 B 2 1 64 45 220 9RJC 44 219 Q15005 C 3 2 177 1 174 9RJC 1 174 P61009 D 4 1 174 1 SER engineered mutation ALA 56 9RJC A P67812 UNP 56 54 3 expression tag ASP 42 9RJC C Q15005 UNP 1 12 5 3 anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel anti-parallel A ILE 49 A ILE 47 A VAL 51 A VAL 49 A LEU 66 A LEU 64 A THR 70 A THR 68 A ILE 82 A ILE 80 A PHE 85 A PHE 83 A ILE 94 A ILE 92 A GLU 103 A GLU 101 A ILE 109 A ILE 107 A THR 113 A THR 111 A VAL 138 A VAL 136 A VAL 146 A VAL 144 D VAL 82 D VAL 82 D TYR 93 D TYR 93 D LEU 100 D LEU 100 D LEU 111 D LEU 111 D VAL 142 D VAL 142 D PRO 152 D PRO 152 D GLY 155 D GLY 155 D ILE 156 D ILE 156 D LEU 159 D LEU 159 D THR 161 D THR 161 D VAL 166 D VAL 166 D SER 167 D SER 167 C VAL 74 C VAL 32 C GLU 75 C GLU 33 C ILE 138 C ILE 96 C ARG 144 C ARG 102 C ASP 154 C ASP 112 C LEU 162 C LEU 120 C LYS 168 C LYS 126 C ILE 176 C ILE 134 C ARG 184 C ARG 142 C SER 191 C SER 149 D ARG 40 D ARG 40 D ASN 50 D ASN 50 D ASP 62 D ASP 62 D ALA 72 D ALA 72 D LEU 118 D LEU 118 D MET 123 D MET 123 1 P 1