HEADER MEMBRANE PROTEIN 11-JAN-26 10BZ TITLE STRUCTURE OF HUMAN PTDSS1 IN COMPLEX WITH CALCIUM COMPND MOL_ID: 1; COMPND 2 MOLECULE: PHOSPHATIDYLSERINE SYNTHASE 1; COMPND 3 CHAIN: A, B; COMPND 4 SYNONYM: PSS-1,PTDSER SYNTHASE 1,SERINE-EXCHANGE ENZYME I; COMPND 5 EC: 2.7.8.29; COMPND 6 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606; SOURCE 5 GENE: PTDSS1, KIAA0024, PSSA; SOURCE 6 EXPRESSION_SYSTEM: SPODOPTERA FRUGIPERDA; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 7108 KEYWDS PHOSPHATIDYLSERINE SYNTHESIS, MEMBRANE PROTEIN EXPDTA ELECTRON MICROSCOPY AUTHOR W.LIE,Z.MING REVDAT 1 28-OCT-26 10BZ 0 JRNL AUTH L.WANG,Z.ZHANG,H.YANG,A.LAGANOWSKY,M.ZHOU JRNL TITL MECHANISMS OF SUBSTRATE RECOGNITION AND CATALYSIS IN A JRNL TITL 2 MAMMALIAN PHOSPHATIDYLSERINE SYNTHASE 2. JRNL REF PROC.NATL.ACAD.SCI.USA V. 123 82123 2026 JRNL REFN ESSN 1091-6490 JRNL PMID 42809401 JRNL DOI 10.1073/PNAS.2607382123 REMARK 2 REMARK 2 RESOLUTION. 3.10 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 SOFTWARE PACKAGES : CRYOSPARC, PHENIX, CRYOSPARC REMARK 3 RECONSTRUCTION SCHEMA : NULL REMARK 3 REMARK 3 EM MAP-MODEL FITTING AND REFINEMENT REMARK 3 PDB ENTRY : NULL REMARK 3 REFINEMENT SPACE : NULL REMARK 3 REFINEMENT PROTOCOL : NULL REMARK 3 REFINEMENT TARGET : NULL REMARK 3 OVERALL ANISOTROPIC B VALUE : NULL REMARK 3 REMARK 3 FITTING PROCEDURE : NULL REMARK 3 REMARK 3 EM IMAGE RECONSTRUCTION STATISTICS REMARK 3 NOMINAL PIXEL SIZE (ANGSTROMS) : NULL REMARK 3 ACTUAL PIXEL SIZE (ANGSTROMS) : NULL REMARK 3 EFFECTIVE RESOLUTION (ANGSTROMS) : 3.100 REMARK 3 NUMBER OF PARTICLES : 340120 REMARK 3 CTF CORRECTION METHOD : NONE REMARK 3 REMARK 3 EM RECONSTRUCTION MAGNIFICATION CALIBRATION: NULL REMARK 3 REMARK 3 OTHER DETAILS: NULL REMARK 4 REMARK 4 10BZ COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 15-JAN-26. REMARK 100 THE DEPOSITION ID IS D_1000304171. REMARK 245 REMARK 245 EXPERIMENTAL DETAILS REMARK 245 RECONSTRUCTION METHOD : SINGLE PARTICLE REMARK 245 SPECIMEN TYPE : NULL REMARK 245 REMARK 245 ELECTRON MICROSCOPE SAMPLE REMARK 245 SAMPLE TYPE : PARTICLE REMARK 245 PARTICLE TYPE : POINT REMARK 245 NAME OF SAMPLE : PHOSPHATIDYLSERINE SYNTHASE REMARK 245 SAMPLE CONCENTRATION (MG ML-1) : NULL REMARK 245 SAMPLE SUPPORT DETAILS : NULL REMARK 245 SAMPLE VITRIFICATION DETAILS : NULL REMARK 245 SAMPLE BUFFER : NULL REMARK 245 PH : 7.50 REMARK 245 SAMPLE DETAILS : NULL REMARK 245 REMARK 245 DATA ACQUISITION REMARK 245 DATE OF EXPERIMENT : NULL REMARK 245 NUMBER OF MICROGRAPHS-IMAGES : NULL REMARK 245 TEMPERATURE (KELVIN) : NULL REMARK 245 MICROSCOPE MODEL : TFS KRIOS REMARK 245 DETECTOR TYPE : GATAN K3 BIOQUANTUM (6K X REMARK 245 4K) REMARK 245 MINIMUM DEFOCUS (NM) : 800.00 REMARK 245 MAXIMUM DEFOCUS (NM) : 2000.00 REMARK 245 MINIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 MAXIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 NOMINAL CS : NULL REMARK 245 IMAGING MODE : DARK FIELD REMARK 245 ELECTRON DOSE (ELECTRONS NM**-2) : 5000.00 REMARK 245 ILLUMINATION MODE : FLOOD BEAM REMARK 245 NOMINAL MAGNIFICATION : NULL REMARK 245 CALIBRATED MAGNIFICATION : NULL REMARK 245 SOURCE : FIELD EMISSION GUN REMARK 245 ACCELERATION VOLTAGE (KV) : 300 REMARK 245 IMAGING DETAILS : NULL REMARK 247 REMARK 247 ELECTRON MICROSCOPY REMARK 247 THE COORDINATES IN THIS ENTRY WERE GENERATED FROM ELECTRON REMARK 247 MICROSCOPY DATA. PROTEIN DATA BANK CONVENTIONS REQUIRE REMARK 247 THAT CRYST1 AND SCALE RECORDS BE INCLUDED, BUT THE VALUES REMARK 247 ON THESE RECORDS ARE MEANINGLESS EXCEPT FOR THE CALCULATION REMARK 247 OF THE STRUCTURE FACTORS. REMARK 300 REMARK 300 BIOMOLECULE: 1 REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON REMARK 300 BURIED SURFACE AREA. REMARK 350 REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS REMARK 350 GIVEN BELOW. BOTH NON-CRYSTALLOGRAPHIC AND REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN. REMARK 350 REMARK 350 BIOMOLECULE: 1 REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: DIMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B REMARK 350 BIOMT1 1 1.000000 0.000000 0.000000 0.00000 REMARK 350 BIOMT2 1 0.000000 1.000000 0.000000 0.00000 REMARK 350 BIOMT3 1 0.000000 0.000000 1.000000 0.00000 REMARK 465 REMARK 465 MISSING RESIDUES REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.) REMARK 465 REMARK 465 M RES C SSSEQI REMARK 465 MET A 1 REMARK 465 ALA A 2 REMARK 465 SER A 3 REMARK 465 CYS A 4 REMARK 465 VAL A 5 REMARK 465 GLY A 6 REMARK 465 SER A 7 REMARK 465 ARG A 8 REMARK 465 THR A 9 REMARK 465 LEU A 10 REMARK 465 SER A 11 REMARK 465 LYS A 12 REMARK 465 ASP A 13 REMARK 465 ASP A 14 REMARK 465 VAL A 15 REMARK 465 ASN A 16 REMARK 465 TYR A 17 REMARK 465 LYS A 18 REMARK 465 MET A 19 REMARK 465 HIS A 20 REMARK 465 PHE A 21 REMARK 465 ARG A 22 REMARK 465 MET A 23 REMARK 465 ILE A 24 REMARK 465 ASN A 25 REMARK 465 GLU A 26 REMARK 465 GLN A 27 REMARK 465 GLN A 28 REMARK 465 VAL A 29 REMARK 465 GLU A 30 REMARK 465 ASP A 31 REMARK 465 ILE A 32 REMARK 465 THR A 33 REMARK 465 ILE A 34 REMARK 465 ASP A 35 REMARK 465 PHE A 36 REMARK 465 PHE A 37 REMARK 465 TYR A 38 REMARK 465 ARG A 39 REMARK 465 PRO A 40 REMARK 465 MET A 242 REMARK 465 ARG A 243 REMARK 465 THR A 244 REMARK 465 TYR A 245 REMARK 465 HIS A 246 REMARK 465 TRP A 247 REMARK 465 ALA A 248 REMARK 465 SER A 249 REMARK 465 PHE A 250 REMARK 465 LYS A 251 REMARK 465 ASP A 252 REMARK 465 ILE A 253 REMARK 465 HIS A 254 REMARK 465 THR A 255 REMARK 465 THR A 256 REMARK 465 THR A 257 REMARK 465 GLY A 258 REMARK 465 LYS A 259 REMARK 465 ILE A 260 REMARK 465 LYS A 261 REMARK 465 ARG A 262 REMARK 465 ALA A 263 REMARK 465 VAL A 264 REMARK 465 LEU A 265 REMARK 465 GLN A 266 REMARK 465 PHE A 267 REMARK 465 THR A 268 REMARK 465 PRO A 269 REMARK 465 ALA A 270 REMARK 465 SER A 271 REMARK 465 TRP A 272 REMARK 465 HIS A 411 REMARK 465 ARG A 412 REMARK 465 GLU A 413 REMARK 465 LYS A 414 REMARK 465 THR A 415 REMARK 465 TYR A 416 REMARK 465 SER A 417 REMARK 465 GLU A 418 REMARK 465 CYS A 419 REMARK 465 GLU A 420 REMARK 465 ASP A 421 REMARK 465 GLY A 422 REMARK 465 THR A 423 REMARK 465 TYR A 424 REMARK 465 SER A 425 REMARK 465 PRO A 426 REMARK 465 GLU A 427 REMARK 465 ILE A 428 REMARK 465 SER A 429 REMARK 465 TRP A 430 REMARK 465 HIS A 431 REMARK 465 HIS A 432 REMARK 465 ARG A 433 REMARK 465 LYS A 434 REMARK 465 GLY A 435 REMARK 465 THR A 436 REMARK 465 LYS A 437 REMARK 465 GLY A 438 REMARK 465 SER A 439 REMARK 465 GLU A 440 REMARK 465 ASP A 441 REMARK 465 SER A 442 REMARK 465 PRO A 443 REMARK 465 PRO A 444 REMARK 465 LYS A 445 REMARK 465 HIS A 446 REMARK 465 ALA A 447 REMARK 465 GLY A 448 REMARK 465 ASN A 449 REMARK 465 ASN A 450 REMARK 465 GLU A 451 REMARK 465 SER A 452 REMARK 465 HIS A 453 REMARK 465 SER A 454 REMARK 465 SER A 455 REMARK 465 ARG A 456 REMARK 465 ARG A 457 REMARK 465 ARG A 458 REMARK 465 ASN A 459 REMARK 465 ARG A 460 REMARK 465 HIS A 461 REMARK 465 SER A 462 REMARK 465 LYS A 463 REMARK 465 SER A 464 REMARK 465 LYS A 465 REMARK 465 VAL A 466 REMARK 465 THR A 467 REMARK 465 ASN A 468 REMARK 465 GLY A 469 REMARK 465 VAL A 470 REMARK 465 GLY A 471 REMARK 465 LYS A 472 REMARK 465 LYS A 473 REMARK 465 MET B 1 REMARK 465 ALA B 2 REMARK 465 SER B 3 REMARK 465 CYS B 4 REMARK 465 VAL B 5 REMARK 465 GLY B 6 REMARK 465 SER B 7 REMARK 465 ARG B 8 REMARK 465 THR B 9 REMARK 465 LEU B 10 REMARK 465 SER B 11 REMARK 465 LYS B 12 REMARK 465 ASP B 13 REMARK 465 ASP B 14 REMARK 465 VAL B 15 REMARK 465 ASN B 16 REMARK 465 TYR B 17 REMARK 465 LYS B 18 REMARK 465 MET B 19 REMARK 465 HIS B 20 REMARK 465 PHE B 21 REMARK 465 ARG B 22 REMARK 465 MET B 23 REMARK 465 ILE B 24 REMARK 465 ASN B 25 REMARK 465 GLU B 26 REMARK 465 GLN B 27 REMARK 465 GLN B 28 REMARK 465 VAL B 29 REMARK 465 GLU B 30 REMARK 465 ASP B 31 REMARK 465 ILE B 32 REMARK 465 THR B 33 REMARK 465 ILE B 34 REMARK 465 ASP B 35 REMARK 465 PHE B 36 REMARK 465 PHE B 37 REMARK 465 TYR B 38 REMARK 465 ARG B 39 REMARK 465 PRO B 40 REMARK 465 MET B 242 REMARK 465 ARG B 243 REMARK 465 THR B 244 REMARK 465 TYR B 245 REMARK 465 HIS B 246 REMARK 465 TRP B 247 REMARK 465 ALA B 248 REMARK 465 SER B 249 REMARK 465 PHE B 250 REMARK 465 LYS B 251 REMARK 465 ASP B 252 REMARK 465 ILE B 253 REMARK 465 HIS B 254 REMARK 465 THR B 255 REMARK 465 THR B 256 REMARK 465 THR B 257 REMARK 465 GLY B 258 REMARK 465 LYS B 259 REMARK 465 ILE B 260 REMARK 465 LYS B 261 REMARK 465 ARG B 262 REMARK 465 ALA B 263 REMARK 465 VAL B 264 REMARK 465 LEU B 265 REMARK 465 GLN B 266 REMARK 465 PHE B 267 REMARK 465 THR B 268 REMARK 465 PRO B 269 REMARK 465 ALA B 270 REMARK 465 SER B 271 REMARK 465 TRP B 272 REMARK 465 HIS B 411 REMARK 465 ARG B 412 REMARK 465 GLU B 413 REMARK 465 LYS B 414 REMARK 465 THR B 415 REMARK 465 TYR B 416 REMARK 465 SER B 417 REMARK 465 GLU B 418 REMARK 465 CYS B 419 REMARK 465 GLU B 420 REMARK 465 ASP B 421 REMARK 465 GLY B 422 REMARK 465 THR B 423 REMARK 465 TYR B 424 REMARK 465 SER B 425 REMARK 465 PRO B 426 REMARK 465 GLU B 427 REMARK 465 ILE B 428 REMARK 465 SER B 429 REMARK 465 TRP B 430 REMARK 465 HIS B 431 REMARK 465 HIS B 432 REMARK 465 ARG B 433 REMARK 465 LYS B 434 REMARK 465 GLY B 435 REMARK 465 THR B 436 REMARK 465 LYS B 437 REMARK 465 GLY B 438 REMARK 465 SER B 439 REMARK 465 GLU B 440 REMARK 465 ASP B 441 REMARK 465 SER B 442 REMARK 465 PRO B 443 REMARK 465 PRO B 444 REMARK 465 LYS B 445 REMARK 465 HIS B 446 REMARK 465 ALA B 447 REMARK 465 GLY B 448 REMARK 465 ASN B 449 REMARK 465 ASN B 450 REMARK 465 GLU B 451 REMARK 465 SER B 452 REMARK 465 HIS B 453 REMARK 465 SER B 454 REMARK 465 SER B 455 REMARK 465 ARG B 456 REMARK 465 ARG B 457 REMARK 465 ARG B 458 REMARK 465 ASN B 459 REMARK 465 ARG B 460 REMARK 465 HIS B 461 REMARK 465 SER B 462 REMARK 465 LYS B 463 REMARK 465 SER B 464 REMARK 465 LYS B 465 REMARK 465 VAL B 466 REMARK 465 THR B 467 REMARK 465 ASN B 468 REMARK 465 GLY B 469 REMARK 465 VAL B 470 REMARK 465 GLY B 471 REMARK 465 LYS B 472 REMARK 465 LYS B 473 REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: TORSION ANGLES REMARK 500 REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS: REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 STANDARD TABLE: REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2) REMARK 500 REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI- REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400 REMARK 500 REMARK 500 M RES CSSEQI PSI PHI REMARK 500 SER A 63 -25.05 -141.38 REMARK 500 GLU A 66 -63.38 63.78 REMARK 500 PRO A 96 145.07 -39.95 REMARK 500 HIS A 97 119.45 -28.59 REMARK 500 PRO A 98 50.56 -67.54 REMARK 500 VAL A 146 -61.95 -120.71 REMARK 500 VAL A 312 78.24 57.52 REMARK 500 GLN A 380 72.53 57.73 REMARK 500 SER B 63 -25.05 -141.38 REMARK 500 GLU B 66 -63.38 63.78 REMARK 500 PRO B 96 145.07 -39.95 REMARK 500 HIS B 97 119.45 -28.59 REMARK 500 PRO B 98 50.56 -67.54 REMARK 500 VAL B 146 -61.95 -120.71 REMARK 500 VAL B 312 78.24 57.52 REMARK 500 GLN B 380 72.53 57.73 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: NON-CIS, NON-TRANS REMARK 500 REMARK 500 THE FOLLOWING PEPTIDE BONDS DEVIATE SIGNIFICANTLY FROM BOTH REMARK 500 CIS AND TRANS CONFORMATION. CIS BONDS, IF ANY, ARE LISTED REMARK 500 ON CISPEP RECORDS. TRANS IS DEFINED AS 180 +/- 30 AND REMARK 500 CIS IS DEFINED AS 0 +/- 30 DEGREES. REMARK 500 MODEL OMEGA REMARK 500 ARG A 95 PRO A 96 -138.52 REMARK 500 ARG B 95 PRO B 96 -138.52 REMARK 500 REMARK 500 REMARK: NULL REMARK 620 REMARK 620 METAL COORDINATION REMARK 620 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 620 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE): REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA A 502 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLU A 197 OE1 REMARK 620 2 GLU A 197 OE2 43.8 REMARK 620 3 GLU A 200 OE1 90.9 106.6 REMARK 620 4 GLU A 212 OE2 95.8 139.5 63.8 REMARK 620 5 ASP A 221 OD2 112.1 103.4 150.0 93.8 REMARK 620 N 1 2 3 4 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA A 501 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP A 221 OD1 REMARK 620 2 ASP A 221 OD2 43.9 REMARK 620 N 1 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA B 502 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLU B 197 OE1 REMARK 620 2 GLU B 197 OE2 43.8 REMARK 620 3 GLU B 200 OE1 90.9 106.6 REMARK 620 4 GLU B 212 OE2 95.8 139.5 63.8 REMARK 620 5 ASP B 221 OD2 112.1 103.4 150.0 93.8 REMARK 620 N 1 2 3 4 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA B 501 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP B 221 OD1 REMARK 620 2 ASP B 221 OD2 43.9 REMARK 620 N 1 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-75057 RELATED DB: EMDB REMARK 900 STRUCTURE OF HUMAN PTDSS1 IN COMPLEX WITH CALCIUM DBREF 10BZ A 1 473 UNP P48651 PTSS1_HUMAN 1 473 DBREF 10BZ B 1 473 UNP P48651 PTSS1_HUMAN 1 473 SEQRES 1 A 473 MET ALA SER CYS VAL GLY SER ARG THR LEU SER LYS ASP SEQRES 2 A 473 ASP VAL ASN TYR LYS MET HIS PHE ARG MET ILE ASN GLU SEQRES 3 A 473 GLN GLN VAL GLU ASP ILE THR ILE ASP PHE PHE TYR ARG SEQRES 4 A 473 PRO HIS THR ILE THR LEU LEU SER PHE THR ILE VAL SER SEQRES 5 A 473 LEU MET TYR PHE ALA PHE THR ARG ASP ASP SER VAL PRO SEQRES 6 A 473 GLU ASP ASN ILE TRP ARG GLY ILE LEU SER VAL ILE PHE SEQRES 7 A 473 PHE PHE LEU ILE ILE SER VAL LEU ALA PHE PRO ASN GLY SEQRES 8 A 473 PRO PHE THR ARG PRO HIS PRO ALA LEU TRP ARG MET VAL SEQRES 9 A 473 PHE GLY LEU SER VAL LEU TYR PHE LEU PHE LEU VAL PHE SEQRES 10 A 473 LEU LEU PHE LEU ASN PHE GLU GLN VAL LYS SER LEU MET SEQRES 11 A 473 TYR TRP LEU ASP PRO ASN LEU ARG TYR ALA THR ARG GLU SEQRES 12 A 473 ALA ASP VAL MET GLU TYR ALA VAL ASN CYS HIS VAL ILE SEQRES 13 A 473 THR TRP GLU ARG ILE ILE SER HIS PHE ASP ILE PHE ALA SEQRES 14 A 473 PHE GLY HIS PHE TRP GLY TRP ALA MET LYS ALA LEU LEU SEQRES 15 A 473 ILE ARG SER TYR GLY LEU CYS TRP THR ILE SER ILE THR SEQRES 16 A 473 TRP GLU LEU THR GLU LEU PHE PHE MET HIS LEU LEU PRO SEQRES 17 A 473 ASN PHE ALA GLU CYS TRP TRP ASP GLN VAL ILE LEU ASP SEQRES 18 A 473 ILE LEU LEU CYS ASN GLY GLY GLY ILE TRP LEU GLY MET SEQRES 19 A 473 VAL VAL CYS ARG PHE LEU GLU MET ARG THR TYR HIS TRP SEQRES 20 A 473 ALA SER PHE LYS ASP ILE HIS THR THR THR GLY LYS ILE SEQRES 21 A 473 LYS ARG ALA VAL LEU GLN PHE THR PRO ALA SER TRP THR SEQRES 22 A 473 TYR VAL ARG TRP PHE ASP PRO LYS SER SER PHE GLN ARG SEQRES 23 A 473 VAL ALA GLY VAL TYR LEU PHE MET ILE ILE TRP GLN LEU SEQRES 24 A 473 THR GLU LEU ASN THR PHE PHE LEU LYS HIS ILE PHE VAL SEQRES 25 A 473 PHE GLN ALA SER HIS PRO LEU SER TRP GLY ARG ILE LEU SEQRES 26 A 473 PHE ILE GLY GLY ILE THR ALA PRO THR VAL ARG GLN TYR SEQRES 27 A 473 TYR ALA TYR LEU THR ASP THR GLN CYS LYS ARG VAL GLY SEQRES 28 A 473 THR GLN CYS TRP VAL PHE GLY VAL ILE GLY PHE LEU GLU SEQRES 29 A 473 ALA ILE VAL CYS ILE LYS PHE GLY GLN ASP LEU PHE SER SEQRES 30 A 473 LYS THR GLN ILE LEU TYR VAL VAL LEU TRP LEU LEU CYS SEQRES 31 A 473 VAL ALA PHE THR THR PHE LEU CYS LEU TYR GLY MET ILE SEQRES 32 A 473 TRP TYR ALA GLU HIS TYR GLY HIS ARG GLU LYS THR TYR SEQRES 33 A 473 SER GLU CYS GLU ASP GLY THR TYR SER PRO GLU ILE SER SEQRES 34 A 473 TRP HIS HIS ARG LYS GLY THR LYS GLY SER GLU ASP SER SEQRES 35 A 473 PRO PRO LYS HIS ALA GLY ASN ASN GLU SER HIS SER SER SEQRES 36 A 473 ARG ARG ARG ASN ARG HIS SER LYS SER LYS VAL THR ASN SEQRES 37 A 473 GLY VAL GLY LYS LYS SEQRES 1 B 473 MET ALA SER CYS VAL GLY SER ARG THR LEU SER LYS ASP SEQRES 2 B 473 ASP VAL ASN TYR LYS MET HIS PHE ARG MET ILE ASN GLU SEQRES 3 B 473 GLN GLN VAL GLU ASP ILE THR ILE ASP PHE PHE TYR ARG SEQRES 4 B 473 PRO HIS THR ILE THR LEU LEU SER PHE THR ILE VAL SER SEQRES 5 B 473 LEU MET TYR PHE ALA PHE THR ARG ASP ASP SER VAL PRO SEQRES 6 B 473 GLU ASP ASN ILE TRP ARG GLY ILE LEU SER VAL ILE PHE SEQRES 7 B 473 PHE PHE LEU ILE ILE SER VAL LEU ALA PHE PRO ASN GLY SEQRES 8 B 473 PRO PHE THR ARG PRO HIS PRO ALA LEU TRP ARG MET VAL SEQRES 9 B 473 PHE GLY LEU SER VAL LEU TYR PHE LEU PHE LEU VAL PHE SEQRES 10 B 473 LEU LEU PHE LEU ASN PHE GLU GLN VAL LYS SER LEU MET SEQRES 11 B 473 TYR TRP LEU ASP PRO ASN LEU ARG TYR ALA THR ARG GLU SEQRES 12 B 473 ALA ASP VAL MET GLU TYR ALA VAL ASN CYS HIS VAL ILE SEQRES 13 B 473 THR TRP GLU ARG ILE ILE SER HIS PHE ASP ILE PHE ALA SEQRES 14 B 473 PHE GLY HIS PHE TRP GLY TRP ALA MET LYS ALA LEU LEU SEQRES 15 B 473 ILE ARG SER TYR GLY LEU CYS TRP THR ILE SER ILE THR SEQRES 16 B 473 TRP GLU LEU THR GLU LEU PHE PHE MET HIS LEU LEU PRO SEQRES 17 B 473 ASN PHE ALA GLU CYS TRP TRP ASP GLN VAL ILE LEU ASP SEQRES 18 B 473 ILE LEU LEU CYS ASN GLY GLY GLY ILE TRP LEU GLY MET SEQRES 19 B 473 VAL VAL CYS ARG PHE LEU GLU MET ARG THR TYR HIS TRP SEQRES 20 B 473 ALA SER PHE LYS ASP ILE HIS THR THR THR GLY LYS ILE SEQRES 21 B 473 LYS ARG ALA VAL LEU GLN PHE THR PRO ALA SER TRP THR SEQRES 22 B 473 TYR VAL ARG TRP PHE ASP PRO LYS SER SER PHE GLN ARG SEQRES 23 B 473 VAL ALA GLY VAL TYR LEU PHE MET ILE ILE TRP GLN LEU SEQRES 24 B 473 THR GLU LEU ASN THR PHE PHE LEU LYS HIS ILE PHE VAL SEQRES 25 B 473 PHE GLN ALA SER HIS PRO LEU SER TRP GLY ARG ILE LEU SEQRES 26 B 473 PHE ILE GLY GLY ILE THR ALA PRO THR VAL ARG GLN TYR SEQRES 27 B 473 TYR ALA TYR LEU THR ASP THR GLN CYS LYS ARG VAL GLY SEQRES 28 B 473 THR GLN CYS TRP VAL PHE GLY VAL ILE GLY PHE LEU GLU SEQRES 29 B 473 ALA ILE VAL CYS ILE LYS PHE GLY GLN ASP LEU PHE SER SEQRES 30 B 473 LYS THR GLN ILE LEU TYR VAL VAL LEU TRP LEU LEU CYS SEQRES 31 B 473 VAL ALA PHE THR THR PHE LEU CYS LEU TYR GLY MET ILE SEQRES 32 B 473 TRP TYR ALA GLU HIS TYR GLY HIS ARG GLU LYS THR TYR SEQRES 33 B 473 SER GLU CYS GLU ASP GLY THR TYR SER PRO GLU ILE SER SEQRES 34 B 473 TRP HIS HIS ARG LYS GLY THR LYS GLY SER GLU ASP SER SEQRES 35 B 473 PRO PRO LYS HIS ALA GLY ASN ASN GLU SER HIS SER SER SEQRES 36 B 473 ARG ARG ARG ASN ARG HIS SER LYS SER LYS VAL THR ASN SEQRES 37 B 473 GLY VAL GLY LYS LYS HET CA A 501 1 HET CA A 502 1 HET CA B 501 1 HET CA B 502 1 HETNAM CA CALCIUM ION FORMUL 3 CA 4(CA 2+) HELIX 1 AA1 HIS A 41 ARG A 60 1 20 HELIX 2 AA2 GLU A 66 PHE A 88 1 23 HELIX 3 AA3 ALA A 99 LEU A 121 1 23 HELIX 4 AA4 ASN A 122 ASP A 134 1 13 HELIX 5 AA5 PRO A 135 ALA A 140 5 6 HELIX 6 AA6 ARG A 142 VAL A 146 5 5 HELIX 7 AA7 THR A 157 HIS A 164 1 8 HELIX 8 AA8 ASP A 166 ARG A 184 1 19 HELIX 9 AA9 SER A 185 PHE A 203 1 19 HELIX 10 AB1 MET A 204 LEU A 206 5 3 HELIX 11 AB2 LEU A 207 ALA A 211 5 5 HELIX 12 AB3 CYS A 213 GLU A 241 1 29 HELIX 13 AB4 SER A 283 VAL A 312 1 30 HELIX 14 AB5 HIS A 317 ASP A 344 1 28 HELIX 15 AB6 GLY A 351 GLY A 372 1 22 HELIX 16 AB7 GLY A 372 SER A 377 1 6 HELIX 17 AB8 GLN A 380 TYR A 409 1 30 HELIX 18 AB9 THR B 42 ARG B 60 1 19 HELIX 19 AC1 GLU B 66 PHE B 88 1 23 HELIX 20 AC2 ALA B 99 LEU B 121 1 23 HELIX 21 AC3 ASN B 122 ASP B 134 1 13 HELIX 22 AC4 PRO B 135 ALA B 140 5 6 HELIX 23 AC5 ARG B 142 VAL B 146 5 5 HELIX 24 AC6 THR B 157 HIS B 164 1 8 HELIX 25 AC7 ASP B 166 ARG B 184 1 19 HELIX 26 AC8 SER B 185 PHE B 203 1 19 HELIX 27 AC9 MET B 204 LEU B 206 5 3 HELIX 28 AD1 LEU B 207 ALA B 211 5 5 HELIX 29 AD2 CYS B 213 GLU B 241 1 29 HELIX 30 AD3 SER B 283 VAL B 312 1 30 HELIX 31 AD4 HIS B 317 ASP B 344 1 28 HELIX 32 AD5 GLY B 351 GLY B 372 1 22 HELIX 33 AD6 GLY B 372 SER B 377 1 6 HELIX 34 AD7 GLN B 380 TYR B 409 1 30 SSBOND 1 CYS A 153 CYS A 213 1555 1555 2.03 SSBOND 2 CYS B 153 CYS B 213 1555 1555 2.03 LINK OE1 GLU A 197 CA CA A 502 1555 1555 2.48 LINK OE2 GLU A 197 CA CA A 502 1555 1555 3.15 LINK OE1 GLU A 200 CA CA A 502 1555 1555 3.01 LINK OE2 GLU A 212 CA CA A 502 1555 1555 2.73 LINK OD1 ASP A 221 CA CA A 501 1555 1555 3.16 LINK OD2 ASP A 221 CA CA A 501 1555 1555 2.43 LINK OD2 ASP A 221 CA CA A 502 1555 1555 3.09 LINK OE1 GLU B 197 CA CA B 502 1555 1555 2.48 LINK OE2 GLU B 197 CA CA B 502 1555 1555 3.15 LINK OE1 GLU B 200 CA CA B 502 1555 1555 3.01 LINK OE2 GLU B 212 CA CA B 502 1555 1555 2.73 LINK OD1 ASP B 221 CA CA B 501 1555 1555 3.16 LINK OD2 ASP B 221 CA CA B 501 1555 1555 2.43 LINK OD2 ASP B 221 CA CA B 502 1555 1555 3.09 CRYST1 1.000 1.000 1.000 90.00 90.00 90.00 P 1 ORIGX1 1.000000 0.000000 0.000000 0.00000 ORIGX2 0.000000 1.000000 0.000000 0.00000 ORIGX3 0.000000 0.000000 1.000000 0.00000 SCALE1 1.000000 0.000000 0.000000 0.00000 SCALE2 0.000000 1.000000 0.000000 0.00000 SCALE3 0.000000 0.000000 1.000000 0.00000 CONECT 944 1458 CONECT 1323 5670 CONECT 1324 5670 CONECT 1347 5670 CONECT 1452 5670 CONECT 1458 944 CONECT 1533 5669 CONECT 1534 5669 5670 CONECT 3778 4292 CONECT 4157 5672 CONECT 4158 5672 CONECT 4181 5672 CONECT 4286 5672 CONECT 4292 3778 CONECT 4367 5671 CONECT 4368 5671 5672 CONECT 5669 1533 1534 CONECT 5670 1323 1324 1347 1452 CONECT 5670 1534 CONECT 5671 4367 4368 CONECT 5672 4157 4158 4181 4286 CONECT 5672 4368 MASTER 458 0 4 34 0 0 0 6 5670 2 22 74 END