HEADER TRANSPORT PROTEIN 07-FEB-22 7TX6 TITLE CRYO-EM STRUCTURE OF THE HUMAN REDUCED FOLATE CARRIER IN COMPLEX WITH TITLE 2 METHOTREXATE COMPND MOL_ID: 1; COMPND 2 MOLECULE: REDUCED FOLATE TRANSPORTER,SOLUBLE CYTOCHROME B562; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: FOLT,INTESTINAL FOLATE CARRIER 1,IFC-1,PLACENTAL FOLATE COMPND 5 TRANSPORTER,REDUCED FOLATE CARRIER PROTEIN,RFC,HRFC,REDUCED FOLATE COMPND 6 TRANSPORTER 1,RFT-1,SOLUTE CARRIER FAMILY 19 MEMBER 1,HSLC19A1, COMPND 7 CYTOCHROME B-562; COMPND 8 ENGINEERED: YES; COMPND 9 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS, ESCHERICHIA COLI; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606, 562; SOURCE 5 GENE: SLC19A1, FLOT1, RFC1, CYBC; SOURCE 6 EXPRESSION_SYSTEM: HOMO SAPIENS; SOURCE 7 EXPRESSION_SYSTEM_COMMON: HUMAN; SOURCE 8 EXPRESSION_SYSTEM_TAXID: 9606; SOURCE 9 EXPRESSION_SYSTEM_CELL_LINE: HEK293S GNTI- KEYWDS TRANSPORTER, REDUCED FOLATE CARRIER, SLC19A1, TRANSPORT PROTEIN, KEYWDS 2 ANION EXCHANGER EXPDTA ELECTRON MICROSCOPY AUTHOR N.J.WRIGHT,J.G.FEDOR,S.-Y.LEE REVDAT 4 13-MAR-24 7TX6 1 SOURCE REVDAT 3 12-OCT-22 7TX6 1 JRNL REVDAT 2 05-OCT-22 7TX6 1 COMPND SOURCE REMARK SEQADV REVDAT 2 2 1 SEQRES REVDAT 1 21-SEP-22 7TX6 0 JRNL AUTH N.J.WRIGHT,J.G.FEDOR,H.ZHANG,P.JEONG,Y.SUO,J.YOO,J.HONG, JRNL AUTH 2 W.IM,S.Y.LEE JRNL TITL METHOTREXATE RECOGNITION BY THE HUMAN REDUCED FOLATE CARRIER JRNL TITL 2 SLC19A1. JRNL REF NATURE V. 609 1056 2022 JRNL REFN ESSN 1476-4687 JRNL PMID 36071163 JRNL DOI 10.1038/S41586-022-05168-0 REMARK 2 REMARK 2 RESOLUTION. 3.30 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 SOFTWARE PACKAGES : LATITUDE, CRYOSPARC, CTFFIND, COOT, REMARK 3 RELION, CRYOSPARC, CRYOSPARC, PHENIX REMARK 3 RECONSTRUCTION SCHEMA : FOURIER SPACE REMARK 3 REMARK 3 EM MAP-MODEL FITTING AND REFINEMENT REMARK 3 PDB ENTRY : NULL REMARK 3 REFINEMENT SPACE : REAL REMARK 3 REFINEMENT PROTOCOL : FLEXIBLE FIT REMARK 3 REFINEMENT TARGET : NULL REMARK 3 OVERALL ANISOTROPIC B VALUE : 53.600 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) : 3.300 REMARK 3 NUMBER OF PARTICLES : 492117 REMARK 3 CTF CORRECTION METHOD : PHASE FLIPPING AND AMPLITUDE REMARK 3 CORRECTION REMARK 3 REMARK 3 EM RECONSTRUCTION MAGNIFICATION CALIBRATION: NULL REMARK 3 REMARK 3 OTHER DETAILS: NULL REMARK 4 REMARK 4 7TX6 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 08-FEB-22. REMARK 100 THE DEPOSITION ID IS D_1000263022. 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 : HUMAN REDUCED FOLATE CARRIER REMARK 245 SLC19A1 REMARK 245 SAMPLE CONCENTRATION (MG ML-1) : 5.00 REMARK 245 SAMPLE SUPPORT DETAILS : NULL REMARK 245 SAMPLE VITRIFICATION DETAILS : NULL REMARK 245 SAMPLE BUFFER : NULL REMARK 245 PH : 8.00 REMARK 245 SAMPLE DETAILS : COVALENTLY MODIFIED LYS411 WITH REMARK 245 METHOTREXATE REMARK 245 REMARK 245 DATA ACQUISITION REMARK 245 DATE OF EXPERIMENT : NULL REMARK 245 NUMBER OF MICROGRAPHS-IMAGES : 25507 REMARK 245 TEMPERATURE (KELVIN) : NULL REMARK 245 MICROSCOPE MODEL : FEI TITAN 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) : 1800.00 REMARK 245 MINIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 MAXIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 NOMINAL CS : 2.70 REMARK 245 IMAGING MODE : BRIGHT FIELD REMARK 245 ELECTRON DOSE (ELECTRONS NM**-2) : 6000.00 REMARK 245 ILLUMINATION MODE : FLOOD BEAM REMARK 245 NOMINAL MAGNIFICATION : 81000 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: MONOMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 1000 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 20200 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: 0.0 KCAL/MOL REMARK 350 APPLY THE FOLLOWING TO CHAINS: A 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 VAL A 2 REMARK 465 PRO A 3 REMARK 465 SER A 4 REMARK 465 SER A 5 REMARK 465 PRO A 6 REMARK 465 ALA A 7 REMARK 465 VAL A 8 REMARK 465 GLU A 9 REMARK 465 LYS A 10 REMARK 465 GLN A 11 REMARK 465 VAL A 12 REMARK 465 PRO A 13 REMARK 465 VAL A 14 REMARK 465 GLU A 15 REMARK 465 PRO A 16 REMARK 465 GLY A 17 REMARK 465 PRO A 18 REMARK 465 ASP A 19 REMARK 465 PRO A 20 REMARK 465 GLU A 21 REMARK 465 LEU A 22 REMARK 465 PHE A 211A REMARK 465 ASN A 211B REMARK 465 ARG A 211C REMARK 465 ASP A 211D REMARK 465 LEU A 211E REMARK 465 GLU A 211F REMARK 465 ASP A 211G REMARK 465 ASN A 211H REMARK 465 TRP A 211I REMARK 465 GLU A 211J REMARK 465 THR A 211K REMARK 465 LEU A 211L REMARK 465 ASN A 211M REMARK 465 ASP A 211N REMARK 465 ASN A 211O REMARK 465 LEU A 211P REMARK 465 LYS A 211Q REMARK 465 VAL A 211R REMARK 465 ILE A 211S REMARK 465 GLU A 211T REMARK 465 LYS A 211U REMARK 465 ALA A 211V REMARK 465 ASP A 211W REMARK 465 ASN A 211X REMARK 465 ALA A 211Y REMARK 465 ALA A 211Z REMARK 465 GLN A 212A REMARK 465 VAL A 212B REMARK 465 LYS A 212C REMARK 465 ASP A 212D REMARK 465 ALA A 212E REMARK 465 LEU A 212F REMARK 465 THR A 212G REMARK 465 LYS A 212H REMARK 465 MET A 212I REMARK 465 ARG A 212J REMARK 465 ALA A 212K REMARK 465 ALA A 212L REMARK 465 ALA A 212M REMARK 465 LEU A 212N REMARK 465 ASP A 212O REMARK 465 ALA A 212P REMARK 465 GLN A 212Q REMARK 465 LYS A 212R REMARK 465 ALA A 212S REMARK 465 THR A 212T REMARK 465 PRO A 212U REMARK 465 PRO A 212V REMARK 465 LYS A 212W REMARK 465 LEU A 212X REMARK 465 GLU A 212Y REMARK 465 ASP A 212Z REMARK 465 LYS A 213A REMARK 465 SER A 213B REMARK 465 PRO A 213C REMARK 465 ASP A 213D REMARK 465 SER A 213E REMARK 465 PRO A 213F REMARK 465 GLU A 213G REMARK 465 MET A 213H REMARK 465 LYS A 213I REMARK 465 ASP A 213J REMARK 465 PHE A 213K REMARK 465 ARG A 213L REMARK 465 HIS A 213M REMARK 465 GLY A 213N REMARK 465 PHE A 213O REMARK 465 ASP A 213P REMARK 465 ILE A 213Q REMARK 465 LEU A 213R REMARK 465 VAL A 213S REMARK 465 GLY A 213T REMARK 465 GLN A 213U REMARK 465 ILE A 213V REMARK 465 ASP A 213W REMARK 465 ASP A 213X REMARK 465 ALA A 213Y REMARK 465 LEU A 213Z REMARK 465 LYS A 214A REMARK 465 LEU A 214B REMARK 465 ALA A 214C REMARK 465 ASN A 214D REMARK 465 GLU A 214E REMARK 465 GLY A 214F REMARK 465 LYS A 214G REMARK 465 VAL A 214H REMARK 465 LYS A 214I REMARK 465 GLU A 214J REMARK 465 ALA A 214K REMARK 465 GLN A 214L REMARK 465 ALA A 214M REMARK 465 ALA A 214N REMARK 465 ALA A 214O REMARK 465 GLU A 214P REMARK 465 GLN A 214Q REMARK 465 LEU A 214R REMARK 465 LYS A 214S REMARK 465 THR A 214T REMARK 465 THR A 214U REMARK 465 ARG A 214V REMARK 465 ASN A 214W REMARK 465 ALA A 214X REMARK 465 TYR A 214Y REMARK 465 ILE A 214Z REMARK 465 GLN A 215A REMARK 465 LYS A 215B REMARK 465 TYR A 215C REMARK 465 LEU A 215D REMARK 465 LEU A 215E REMARK 465 ARG A 215F REMARK 465 VAL A 215G REMARK 465 ALA A 215H REMARK 465 CYS A 215I REMARK 465 GLY A 215J REMARK 465 ASP A 215K REMARK 465 SER A 215L REMARK 465 VAL A 215M REMARK 465 ARG A 460 REMARK 465 GLY A 461 REMARK 465 HIS A 462 REMARK 465 HIS A 463 REMARK 465 PRO A 464 REMARK 465 ARG A 465 REMARK 465 GLN A 466 REMARK 465 PRO A 467 REMARK 465 PRO A 468 REMARK 465 ALA A 469 REMARK 465 GLN A 470 REMARK 465 GLY A 471 REMARK 465 LEU A 472 REMARK 465 ARG A 473 REMARK 465 SER A 474 REMARK 465 ALA A 475 REMARK 465 ALA A 476 REMARK 465 GLU A 477 REMARK 465 GLU A 478 REMARK 465 LYS A 479 REMARK 465 ALA A 480 REMARK 465 ALA A 481 REMARK 465 GLN A 482 REMARK 465 ALA A 483 REMARK 465 LEU A 484 REMARK 465 SER A 485 REMARK 465 VAL A 486 REMARK 465 GLN A 487 REMARK 465 ASP A 488 REMARK 465 LYS A 489 REMARK 465 GLY A 490 REMARK 465 LEU A 491 REMARK 465 GLY A 492 REMARK 465 GLY A 493 REMARK 465 LEU A 494 REMARK 465 GLN A 495 REMARK 465 PRO A 496 REMARK 465 ALA A 497 REMARK 465 GLN A 498 REMARK 465 SER A 499 REMARK 465 PRO A 500 REMARK 465 PRO A 501 REMARK 465 LEU A 502 REMARK 465 SER A 503 REMARK 465 PRO A 504 REMARK 465 GLU A 505 REMARK 465 ASP A 506 REMARK 465 SER A 507 REMARK 465 LEU A 508 REMARK 465 GLY A 509 REMARK 465 ALA A 510 REMARK 465 VAL A 511 REMARK 465 GLY A 512 REMARK 465 PRO A 513 REMARK 465 ALA A 514 REMARK 465 SER A 515 REMARK 465 LEU A 516 REMARK 465 GLU A 517 REMARK 465 GLN A 518 REMARK 465 ARG A 519 REMARK 465 GLN A 520 REMARK 465 SER A 521 REMARK 465 ASP A 522 REMARK 465 PRO A 523 REMARK 465 TYR A 524 REMARK 465 LEU A 525 REMARK 465 ALA A 526 REMARK 465 GLN A 527 REMARK 465 ALA A 528 REMARK 465 PRO A 529 REMARK 465 ALA A 530 REMARK 465 PRO A 531 REMARK 465 GLN A 532 REMARK 465 ALA A 533 REMARK 465 ALA A 534 REMARK 465 GLU A 535 REMARK 465 PHE A 536 REMARK 465 LEU A 537 REMARK 465 SER A 538 REMARK 465 PRO A 539 REMARK 465 VAL A 540 REMARK 465 THR A 541 REMARK 465 THR A 542 REMARK 465 PRO A 543 REMARK 465 SER A 544 REMARK 465 PRO A 545 REMARK 465 CYS A 546 REMARK 465 THR A 547 REMARK 465 LEU A 548 REMARK 465 CYS A 549 REMARK 465 SER A 550 REMARK 465 ALA A 551 REMARK 465 GLN A 552 REMARK 465 ALA A 553 REMARK 465 SER A 554 REMARK 465 GLY A 555 REMARK 465 PRO A 556 REMARK 465 GLU A 557 REMARK 465 ALA A 558 REMARK 465 ALA A 559 REMARK 465 ASP A 560 REMARK 465 GLU A 561 REMARK 465 THR A 562 REMARK 465 CYS A 563 REMARK 465 PRO A 564 REMARK 465 GLN A 565 REMARK 465 LEU A 566 REMARK 465 ALA A 567 REMARK 465 VAL A 568 REMARK 465 HIS A 569 REMARK 465 PRO A 570 REMARK 465 PRO A 571 REMARK 465 GLY A 572 REMARK 465 VAL A 573 REMARK 465 SER A 574 REMARK 465 LYS A 575 REMARK 465 LEU A 576 REMARK 465 GLY A 577 REMARK 465 LEU A 578 REMARK 465 GLN A 579 REMARK 465 CYS A 580 REMARK 465 LEU A 581 REMARK 465 PRO A 582 REMARK 465 SER A 583 REMARK 465 ASP A 584 REMARK 465 GLY A 585 REMARK 465 VAL A 586 REMARK 465 GLN A 587 REMARK 465 ASN A 588 REMARK 465 VAL A 589 REMARK 465 ASN A 590 REMARK 465 GLN A 591 REMARK 465 ALA A 592 REMARK 465 ASN A 593 REMARK 465 SER A 594 REMARK 465 LEU A 595 REMARK 465 GLU A 596 REMARK 465 VAL A 597 REMARK 465 LEU A 598 REMARK 465 PHE A 599 REMARK 465 GLN A 600 REMARK 470 REMARK 470 MISSING ATOM REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER; REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; REMARK 470 I=INSERTION CODE): REMARK 470 M RES CSSEQI ATOMS REMARK 470 ARG A 23 CG CD NE CZ NH1 NH2 REMARK 470 ARG A 26 CG CD NE CZ NH1 NH2 REMARK 470 LYS A 207 CG CD CE NZ REMARK 470 ARG A 208 CG CD NE CZ NH1 NH2 REMARK 470 LEU A 251 CG CD1 CD2 REMARK 470 ARG A 253 CG CD NE CZ NH1 NH2 REMARK 470 MET A 254 CG SD CE REMARK 470 LEU A 255 CG CD1 CD2 REMARK 470 ARG A 256 CG CD NE CZ NH1 NH2 REMARK 470 GLU A 257 CG CD OE1 OE2 REMARK 470 LEU A 258 CG CD1 CD2 REMARK 470 ASP A 260 CG OD1 OD2 REMARK 470 SER A 261 OG REMARK 470 LEU A 262 CG CD1 CD2 REMARK 470 ARG A 263 CG CD NE CZ NH1 NH2 REMARK 470 ARG A 264 CG CD NE CZ NH1 NH2 REMARK 470 LYS A 328 CG CD CE NZ REMARK 470 ARG A 333 CG CD NE CZ NH1 NH2 REMARK 470 ASP A 420 CG OD1 OD2 REMARK 470 ARG A 422 CG CD NE CZ NH1 NH2 REMARK 470 ARG A 456 CG CD NE CZ NH1 NH2 REMARK 470 GLN A 459 CG CD OE1 NE2 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 ARG A 42 86.18 -156.19 REMARK 500 GLU A 67 -66.17 -96.13 REMARK 500 SER A 115 -168.06 -163.70 REMARK 500 SER A 419 -56.72 -131.87 REMARK 500 PRO A 427 -177.88 -64.41 REMARK 500 REMARK 500 REMARK: NULL REMARK 610 REMARK 610 MISSING HETEROATOM REMARK 610 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER; REMARK 610 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; REMARK 610 I=INSERTION CODE): REMARK 610 M RES C SSEQI REMARK 610 AJP A 2501 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-26155 RELATED DB: EMDB REMARK 900 RELATED ID: EMD-26156 RELATED DB: EMDB DBREF 7TX6 A 1 211D UNP P41440 S19A1_HUMAN 1 215 DBREF 7TX6 A 211E 215C UNP P0ABE7 C562_ECOLX 25 127 DBREF 7TX6 A 215E 591 UNP P41440 S19A1_HUMAN 242 591 SEQADV 7TX6 TRP A 211I UNP P0ABE7 MET 29 ENGINEERED MUTATION SEQADV 7TX6 ILE A 214Z UNP P0ABE7 HIS 124 ENGINEERED MUTATION SEQADV 7TX6 LEU A 215D UNP P0ABE7 LINKER SEQADV 7TX6 ALA A 592 UNP P41440 EXPRESSION TAG SEQADV 7TX6 ASN A 593 UNP P41440 EXPRESSION TAG SEQADV 7TX6 SER A 594 UNP P41440 EXPRESSION TAG SEQADV 7TX6 LEU A 595 UNP P41440 EXPRESSION TAG SEQADV 7TX6 GLU A 596 UNP P41440 EXPRESSION TAG SEQADV 7TX6 VAL A 597 UNP P41440 EXPRESSION TAG SEQADV 7TX6 LEU A 598 UNP P41440 EXPRESSION TAG SEQADV 7TX6 PHE A 599 UNP P41440 EXPRESSION TAG SEQADV 7TX6 GLN A 600 UNP P41440 EXPRESSION TAG SEQRES 1 A 678 MET VAL PRO SER SER PRO ALA VAL GLU LYS GLN VAL PRO SEQRES 2 A 678 VAL GLU PRO GLY PRO ASP PRO GLU LEU ARG SER TRP ARG SEQRES 3 A 678 HIS LEU VAL CYS TYR LEU CYS PHE TYR GLY PHE MET ALA SEQRES 4 A 678 GLN ILE ARG PRO GLY GLU SER PHE ILE THR PRO TYR LEU SEQRES 5 A 678 LEU GLY PRO ASP LYS ASN PHE THR ARG GLU GLN VAL THR SEQRES 6 A 678 ASN GLU ILE THR PRO VAL LEU SER TYR SER TYR LEU ALA SEQRES 7 A 678 VAL LEU VAL PRO VAL PHE LEU LEU THR ASP TYR LEU ARG SEQRES 8 A 678 TYR THR PRO VAL LEU LEU LEU GLN GLY LEU SER PHE VAL SEQRES 9 A 678 SER VAL TRP LEU LEU LEU LEU LEU GLY HIS SER VAL ALA SEQRES 10 A 678 HIS MET GLN LEU MET GLU LEU PHE TYR SER VAL THR MET SEQRES 11 A 678 ALA ALA ARG ILE ALA TYR SER SER TYR ILE PHE SER LEU SEQRES 12 A 678 VAL ARG PRO ALA ARG TYR GLN ARG VAL ALA GLY TYR SER SEQRES 13 A 678 ARG ALA ALA VAL LEU LEU GLY VAL PHE THR SER SER VAL SEQRES 14 A 678 LEU GLY GLN LEU LEU VAL THR VAL GLY ARG VAL SER PHE SEQRES 15 A 678 SER THR LEU ASN TYR ILE SER LEU ALA PHE LEU THR PHE SEQRES 16 A 678 SER VAL VAL LEU ALA LEU PHE LEU LYS ARG PRO LYS ARG SEQRES 17 A 678 SER LEU PHE PHE ASN ARG ASP LEU GLU ASP ASN TRP GLU SEQRES 18 A 678 THR LEU ASN ASP ASN LEU LYS VAL ILE GLU LYS ALA ASP SEQRES 19 A 678 ASN ALA ALA GLN VAL LYS ASP ALA LEU THR LYS MET ARG SEQRES 20 A 678 ALA ALA ALA LEU ASP ALA GLN LYS ALA THR PRO PRO LYS SEQRES 21 A 678 LEU GLU ASP LYS SER PRO ASP SER PRO GLU MET LYS ASP SEQRES 22 A 678 PHE ARG HIS GLY PHE ASP ILE LEU VAL GLY GLN ILE ASP SEQRES 23 A 678 ASP ALA LEU LYS LEU ALA ASN GLU GLY LYS VAL LYS GLU SEQRES 24 A 678 ALA GLN ALA ALA ALA GLU GLN LEU LYS THR THR ARG ASN SEQRES 25 A 678 ALA TYR ILE GLN LYS TYR LEU LEU ARG VAL ALA CYS GLY SEQRES 26 A 678 ASP SER VAL LEU ALA ARG MET LEU ARG GLU LEU GLY ASP SEQRES 27 A 678 SER LEU ARG ARG PRO GLN LEU ARG LEU TRP SER LEU TRP SEQRES 28 A 678 TRP VAL PHE ASN SER ALA GLY TYR TYR LEU VAL VAL TYR SEQRES 29 A 678 TYR VAL HIS ILE LEU TRP ASN GLU VAL ASP PRO THR THR SEQRES 30 A 678 ASN SER ALA ARG VAL TYR ASN GLY ALA ALA ASP ALA ALA SEQRES 31 A 678 SER THR LEU LEU GLY ALA ILE THR SER PHE ALA ALA GLY SEQRES 32 A 678 PHE VAL LYS ILE ARG TRP ALA ARG TRP SER LYS LEU LEU SEQRES 33 A 678 ILE ALA GLY VAL THR ALA THR GLN ALA GLY LEU VAL PHE SEQRES 34 A 678 LEU LEU ALA HIS THR ARG HIS PRO SER SER ILE TRP LEU SEQRES 35 A 678 CYS TYR ALA ALA PHE VAL LEU PHE ARG GLY SER TYR GLN SEQRES 36 A 678 PHE LEU VAL PRO ILE ALA THR PHE GLN ILE ALA SER SER SEQRES 37 A 678 LEU SER LYS GLU LEU CYS ALA LEU VAL PHE GLY VAL ASN SEQRES 38 A 678 THR PHE PHE ALA THR ILE VAL LYS THR ILE ILE THR PHE SEQRES 39 A 678 ILE VAL SER ASP VAL ARG GLY LEU GLY LEU PRO VAL ARG SEQRES 40 A 678 LYS GLN PHE GLN LEU TYR SER VAL TYR PHE LEU ILE LEU SEQRES 41 A 678 SER ILE ILE TYR PHE LEU GLY ALA MET LEU ASP GLY LEU SEQRES 42 A 678 ARG HIS CYS GLN ARG GLY HIS HIS PRO ARG GLN PRO PRO SEQRES 43 A 678 ALA GLN GLY LEU ARG SER ALA ALA GLU GLU LYS ALA ALA SEQRES 44 A 678 GLN ALA LEU SER VAL GLN ASP LYS GLY LEU GLY GLY LEU SEQRES 45 A 678 GLN PRO ALA GLN SER PRO PRO LEU SER PRO GLU ASP SER SEQRES 46 A 678 LEU GLY ALA VAL GLY PRO ALA SER LEU GLU GLN ARG GLN SEQRES 47 A 678 SER ASP PRO TYR LEU ALA GLN ALA PRO ALA PRO GLN ALA SEQRES 48 A 678 ALA GLU PHE LEU SER PRO VAL THR THR PRO SER PRO CYS SEQRES 49 A 678 THR LEU CYS SER ALA GLN ALA SER GLY PRO GLU ALA ALA SEQRES 50 A 678 ASP GLU THR CYS PRO GLN LEU ALA VAL HIS PRO PRO GLY SEQRES 51 A 678 VAL SER LYS LEU GLY LEU GLN CYS LEU PRO SER ASP GLY SEQRES 52 A 678 VAL GLN ASN VAL ASN GLN ALA ASN SER LEU GLU VAL LEU SEQRES 53 A 678 PHE GLN HET MTX A2644 32 HET AJP A2501 43 HETNAM MTX METHOTREXATE HETNAM AJP DIGITONIN FORMUL 2 MTX C20 H22 N8 O5 FORMUL 3 AJP C56 H92 O29 HELIX 1 AA1 ARG A 23 GLN A 40 1 18 HELIX 2 AA2 PHE A 47 LEU A 53 1 7 HELIX 3 AA3 THR A 60 GLU A 67 1 8 HELIX 4 AA4 GLU A 67 LEU A 90 1 24 HELIX 5 AA5 ARG A 91 GLY A 113 1 23 HELIX 6 AA6 SER A 115 ALA A 132 1 18 HELIX 7 AA7 ILE A 134 VAL A 144 1 11 HELIX 8 AA8 ARG A 145 ALA A 147 5 3 HELIX 9 AA9 ARG A 148 VAL A 177 1 30 HELIX 10 AB1 SER A 181 ALA A 200 1 20 HELIX 11 AB2 ALA A 252 ARG A 263 1 12 HELIX 12 AB3 ARG A 264 ASP A 296 1 33 HELIX 13 AB4 TYR A 305 PHE A 326 1 22 HELIX 14 AB5 VAL A 327 LYS A 328 5 2 HELIX 15 AB6 ILE A 329 TRP A 334 5 6 HELIX 16 AB7 SER A 335 THR A 356 1 22 HELIX 17 AB8 HIS A 358 SER A 360 5 3 HELIX 18 AB9 SER A 361 SER A 389 1 29 HELIX 19 AC1 SER A 392 SER A 419 1 28 HELIX 20 AC2 PRO A 427 GLN A 459 1 33 LINK NZ LYS A 411 CD MTX A2644 1555 1555 1.45 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