1EXZ - Header Asymmetric Unit

HEADER HORMONE/GROWTH FACTOR 05-MAY-00 1EXZ

TITLE STRUCTURE OF STEM CELL FACTOR

COMPND MOL_ID: 1; COMPND 2 MOLECULE: STEM CELL FACTOR; COMPND 3 CHAIN: A, B, C, D; COMPND 4 FRAGMENT: 26-166; COMPND 5 SYNONYM: SCF; 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 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562

KEYWDS SCF, HORMONE/GROWTH FACTOR COMPLEX

EXPDTA X-RAY DIFFRACTION

AUTHOR Z.ZHANG,R.ZHANG,A.JOACHIMIAK,J.SCHLESSINGER,X.KONG

REVDAT 3 24-FEB-09 1EXZ 1 VERSN REVDAT 2 01-APR-03 1EXZ 1 JRNL REVDAT 1 06-JUL-00 1EXZ 0

JRNL AUTH Z.ZHANG,R.ZHANG,A.JOACHIMIAK,J.SCHLESSINGER, JRNL AUTH 2 X.P.KONG JRNL TITL CRYSTAL STRUCTURE OF HUMAN STEM CELL FACTOR: JRNL TITL 2 IMPLICATION FOR STEM CELL FACTOR RECEPTOR JRNL TITL 3 DIMERIZATION AND ACTIVATION. JRNL REF PROC.NATL.ACAD.SCI.USA V. 97 7732 2000 JRNL REFN ISSN 0027-8424 JRNL PMID 10884405 JRNL DOI 10.1073/PNAS.97.14.7732

REMARK 1

REMARK 2 REMARK 2 RESOLUTION. 2.30 ANGSTROMS.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS REMARK 3 AUTHORS : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE- REMARK 3 : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES, PANNU, REMARK 3 : READ,RICE,SIMONSON,WARREN REMARK 3 REMARK 3 REFINEMENT TARGET : MLF REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.30 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 40.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 2.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : NULL REMARK 3 DATA CUTOFF LOW (ABS(F)) : NULL REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 10.0 REMARK 3 NUMBER OF REFLECTIONS : 21494 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOMLY SELECTED 10% OF REMARK 3 REFLECTIONS REMARK 3 R VALUE (WORKING SET) : 0.223 REMARK 3 FREE R VALUE : 0.294 REMARK 3 FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 FREE R VALUE TEST SET COUNT : 2133 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : NULL REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : NULL REMARK 3 BIN RESOLUTION RANGE HIGH (A) : NULL REMARK 3 BIN RESOLUTION RANGE LOW (A) : NULL REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 REFLECTIONS IN BIN (WORKING SET) : NULL REMARK 3 BIN R VALUE (WORKING SET) : NULL REMARK 3 BIN FREE R VALUE : NULL REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 BIN FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 4090 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 14 REMARK 3 SOLVENT ATOMS : 132 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 45.00 REMARK 3 MEAN B VALUE (OVERALL, A**2) : NULL REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : NULL REMARK 3 B22 (A**2) : NULL REMARK 3 B33 (A**2) : NULL REMARK 3 B12 (A**2) : NULL REMARK 3 B13 (A**2) : NULL REMARK 3 B23 (A**2) : NULL REMARK 3 REMARK 3 ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM SIGMAA (A) : NULL REMARK 3 LOW RESOLUTION CUTOFF (A) : NULL REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM C-V SIGMAA (A) : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.007 REMARK 3 BOND ANGLES (DEGREES) : 1.22 REMARK 3 DIHEDRAL ANGLES (DEGREES) : NULL REMARK 3 IMPROPER ANGLES (DEGREES) : NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : NULL REMARK 3 KSOL : NULL REMARK 3 BSOL : NULL REMARK 3 REMARK 3 NCS MODEL : NULL REMARK 3 REMARK 3 NCS RESTRAINTS. RMS SIGMA/WEIGHT REMARK 3 GROUP 1 POSITIONAL (A) : NULL ; NULL REMARK 3 GROUP 1 B-FACTOR (A**2) : NULL ; NULL REMARK 3 REMARK 3 PARAMETER FILE 1 : NULL REMARK 3 TOPOLOGY FILE 1 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: MAXIMUM LIKELIHOOD TARGET USING REMARK 3 AMPLITUDES

REMARK 4 REMARK 4 1EXZ COMPLIES WITH FORMAT V. 3.15, 01-DEC-08

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 12-MAY-00. REMARK 100 THE RCSB ID CODE IS RCSB011008.

REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 26-NOV-99; NULL REMARK 200 TEMPERATURE (KELVIN) : 100; NULL REMARK 200 PH : 7.0 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y; Y REMARK 200 RADIATION SOURCE : APS; APS REMARK 200 BEAMLINE : 19-ID; 19-ID REMARK 200 X-RAY GENERATOR MODEL : NULL; NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M; NULL REMARK 200 WAVELENGTH OR RANGE (A) : 1.03; 1.55 REMARK 200 MONOCHROMATOR : NULL; NULL REMARK 200 OPTICS : NULL; NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD; NULL REMARK 200 DETECTOR MANUFACTURER : BRANDEIS; NULL REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 21454 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.300 REMARK 200 RESOLUTION RANGE LOW (A) : 40.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 2.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.5 REMARK 200 DATA REDUNDANCY : 8.000 REMARK 200 R MERGE (I) : 0.05800 REMARK 200 R SYM (I) : NULL REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 29.0000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.30 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.38 REMARK 200 COMPLETENESS FOR SHELL (%) : 90.1 REMARK 200 DATA REDUNDANCY IN SHELL : 7.00 REMARK 200 R MERGE FOR SHELL (I) : 0.25000 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH; NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL REMARK 200 SOFTWARE USED: PHASES REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL

REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 36.73 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.94 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 28% PEG 400, 250 MM CACL2, 1 MM REMARK 280 SMCL3, PH 7.0, VAPOR DIFFUSION, HANGING DROP

REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,Y+1/2,-Z REMARK 290 REMARK 290 WHERE NNN -> OPERATOR NUMBER REMARK 290 MMM -> TRANSLATION VECTOR REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY REMARK 290 RELATED MOLECULES. REMARK 290 SMTRY1 1 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 1 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 1 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 2 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 2 0.000000 1.000000 0.000000 43.76300 REMARK 290 SMTRY3 2 0.000000 0.000000 -1.000000 0.00000 REMARK 290 REMARK 290 REMARK: NULL

REMARK 300 REMARK 300 BIOMOLECULE: 1, 2, 3 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 TOTAL BURIED SURFACE AREA: 2440 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 14630 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -36.0 KCAL/MOL 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 350 REMARK 350 BIOMOLECULE: 2 REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: DIMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 1890 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 13680 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -13.0 KCAL/MOL REMARK 350 APPLY THE FOLLOWING TO CHAINS: C, D 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 350 REMARK 350 BIOMOLECULE: 3 REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 6950 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 25680 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -65.0 KCAL/MOL REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C, D 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 GLU A 1 REMARK 465 GLY A 2 REMARK 465 ILE A 3 REMARK 465 GLU A 134 REMARK 465 THR A 135 REMARK 465 SER A 136 REMARK 465 VAL A 140 REMARK 465 SER A 141 REMARK 465 GLU B 201 REMARK 465 GLU C 401 REMARK 465 GLY C 402 REMARK 465 ILE C 403 REMARK 465 CYS C 404 REMARK 465 ARG C 405 REMARK 465 ASN C 406 REMARK 465 ARG C 407 REMARK 465 VAL C 408 REMARK 465 VAL C 540 REMARK 465 SER C 541 REMARK 465 GLU D 601 REMARK 465 GLY D 602 REMARK 465 ILE D 603 REMARK 465 CYS D 604 REMARK 465 ARG D 605 REMARK 465 ASN D 606 REMARK 465 ARG D 607 REMARK 465 VAL D 608 REMARK 465 SER D 733 REMARK 465 GLU D 734 REMARK 465 THR D 735 REMARK 465 SER D 736 REMARK 465 ASP D 737 REMARK 465 CYS D 738 REMARK 465 VAL D 739 REMARK 465 VAL D 740 REMARK 465 SER D 741

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 5 CG CD NE CZ NH1 NH2 REMARK 470 ARG A 7 CG CD NE CZ NH1 NH2 REMARK 470 ASN A 10 CG OD1 ND2 REMARK 470 GLU B 292 CG CD OE1 OE2 REMARK 470 ASN B 293 CG OD1 ND2 REMARK 470 SER B 294 OG REMARK 470 SER B 295 OG REMARK 470 LYS B 296 CG CD CE NZ REMARK 470 ASP B 297 CG OD1 OD2 REMARK 470 LEU B 298 CG CD1 CD2 REMARK 470 LYS B 299 CG CD CE NZ REMARK 470 LYS B 300 CG CD CE NZ REMARK 470 SER B 301 OG REMARK 470 PHE B 302 CG CD1 CD2 CE1 CE2 CZ REMARK 470 LYS B 303 CG CD CE NZ REMARK 470 SER B 341 OG REMARK 470 ASN C 410 CG OD1 ND2 REMARK 470 LYS C 413 CG CD CE NZ REMARK 470 LYS C 491 CG CD CE NZ REMARK 470 GLU C 492 CG CD OE1 OE2 REMARK 470 ASN C 493 CG OD1 ND2 REMARK 470 SER C 494 OG REMARK 470 SER C 495 OG REMARK 470 LYS C 496 CG CD CE NZ REMARK 470 ASP C 497 CG OD1 OD2 REMARK 470 LEU C 498 CG CD1 CD2 REMARK 470 LYS C 499 CG CD CE NZ REMARK 470 LYS C 500 CG CD CE NZ REMARK 470 SER C 501 OG REMARK 470 PHE C 502 CG CD1 CD2 CE1 CE2 CZ REMARK 470 LYS D 696 CG CD CE NZ REMARK 470 LYS D 699 CG CD CE NZ REMARK 470 LYS D 700 CG CD CE NZ REMARK 470 SER D 701 OG REMARK 470 PHE D 702 CG CD1 CD2 CE1 CE2 CZ REMARK 470 LYS D 703 CG CD CE NZ

REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS REMARK 500 REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC REMARK 500 SYMMETRY ARE IN CLOSE CONTACT. AN ATOM LOCATED WITHIN 0.15 REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375 REMARK 500 INSTEAD OF REMARK 500. ATOMS WITH NON-BLANK ALTERNATE REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS. REMARK 500 REMARK 500 DISTANCE CUTOFF: REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI SSYMOP DISTANCE REMARK 500 OE1 GLU D 713 SM SM B 803 2645 2.12 REMARK 500 OE2 GLU A 88 SM SM C 801 2656 2.17 REMARK 500 REMARK 500 REMARK: NULL 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 5 -65.87 -4.28 REMARK 500 THR A 9 90.96 38.88 REMARK 500 VAL A 12 3.11 -60.25 REMARK 500 VAL A 38 -36.73 -146.47 REMARK 500 TRP A 44 -21.13 -142.18 REMARK 500 ILE A 66 35.65 166.97 REMARK 500 SER A 67 13.51 -50.81 REMARK 500 GLU A 68 42.53 -98.98 REMARK 500 ASN A 93 54.54 -99.72 REMARK 500 SER A 95 126.17 169.36 REMARK 500 LYS A 96 -9.40 67.02 REMARK 500 LEU A 98 57.40 -66.75 REMARK 500 LYS A 99 99.50 -42.89 REMARK 500 LYS A 100 -159.84 60.57 REMARK 500 SER A 101 120.52 104.88 REMARK 500 PHE A 102 -100.99 78.79 REMARK 500 LYS A 103 67.43 72.96 REMARK 500 SER A 104 49.82 -174.65 REMARK 500 PRO A 105 -174.23 -69.18 REMARK 500 ASP A 128 77.39 -104.68 REMARK 500 VAL A 130 -38.11 -140.22 REMARK 500 ALA A 132 -109.35 -67.13 REMARK 500 CYS B 204 48.64 33.49 REMARK 500 VAL B 208 41.56 -100.74 REMARK 500 ASN B 211 86.07 65.79 REMARK 500 PRO B 234 -60.17 -18.72 REMARK 500 LYS B 291 -88.25 -57.38 REMARK 500 ASN B 293 114.50 -31.48 REMARK 500 ASP B 297 -44.02 -144.70 REMARK 500 LEU B 298 17.24 163.50 REMARK 500 LYS B 299 66.66 -64.06 REMARK 500 LYS B 300 -70.48 -156.74 REMARK 500 SER B 301 33.75 79.48 REMARK 500 PHE B 302 -96.61 50.55 REMARK 500 LYS B 303 -135.72 -110.80 REMARK 500 ASP B 328 46.04 -91.09 REMARK 500 ALA B 332 -52.19 -155.77 REMARK 500 ASP B 337 -170.84 -66.40 REMARK 500 VAL C 412 82.43 -62.81 REMARK 500 LYS C 413 -50.46 -144.05 REMARK 500 TRP C 444 -30.36 -135.06 REMARK 500 LYS C 491 35.27 -85.08 REMARK 500 GLU C 492 74.18 166.92 REMARK 500 ASN C 493 -90.23 -99.98 REMARK 500 SER C 494 -70.57 -148.85 REMARK 500 SER C 495 -21.21 177.16 REMARK 500 LYS C 500 -141.40 -63.37 REMARK 500 SER C 501 -26.26 69.81 REMARK 500 PHE C 502 -95.94 54.70 REMARK 500 SER C 504 23.12 -179.37 REMARK 500 ALA C 525 25.94 -73.48 REMARK 500 LYS C 527 -93.39 -127.07 REMARK 500 ASP C 528 -113.66 25.52 REMARK 500 PHE C 529 -76.15 -157.68 REMARK 500 VAL C 530 113.93 33.44 REMARK 500 VAL C 531 -163.83 38.30 REMARK 500 ALA C 532 83.17 -57.87 REMARK 500 THR C 535 -92.49 -89.22 REMARK 500 ASP C 537 -177.17 -62.65 REMARK 500 ASN D 610 -131.60 -161.28 REMARK 500 ASN D 611 151.23 -34.49 REMARK 500 VAL D 612 -27.12 -168.83 REMARK 500 PRO D 634 -106.45 -22.48 REMARK 500 MET D 636 14.30 -65.43 REMARK 500 SER D 641 43.50 -71.02 REMARK 500 TRP D 644 -131.64 -82.88 REMARK 500 ILE D 645 -60.00 61.98 REMARK 500 ASN D 693 8.20 -64.37 REMARK 500 LYS D 696 17.16 42.21 REMARK 500 LYS D 699 77.31 179.24 REMARK 500 SER D 701 56.68 165.35 REMARK 500 PHE D 702 83.85 -157.18 REMARK 500 LYS D 703 -88.87 -66.00 REMARK 500 PRO D 705 103.86 -43.94 REMARK 500 ASP D 728 26.85 -153.77 REMARK 500 PHE D 729 -84.23 -51.64 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 SM B 803 SM REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP B 337 OD2 REMARK 620 2 ASP B 337 OD1 44.1 REMARK 620 3 HOH B 859 O 65.7 109.1 REMARK 620 4 VAL B 339 O 87.2 91.9 93.4 REMARK 620 N 1 2 3 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA A 806 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP A 58 OD1 REMARK 620 2 ASP A 54 OD1 74.4 REMARK 620 3 ASP A 54 OD2 79.4 52.5 REMARK 620 4 HOH A 861 O 106.4 128.7 76.8 REMARK 620 N 1 2 3 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 SM B 802 SM REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLU B 288 OE2 REMARK 620 2 ASP D 677 OD1 112.6 REMARK 620 3 ASP B 285 OD1 73.5 173.9 REMARK 620 4 ARG B 207 NH1 103.9 126.1 50.0 REMARK 620 5 ASP D 677 OD2 114.5 46.3 131.8 83.2 REMARK 620 N 1 2 3 4 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 SM C 801 SM REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ASP C 454 OD2 REMARK 620 2 HOH C 946 O 71.7 REMARK 620 3 ASP C 454 OD1 52.8 81.2 REMARK 620 4 ASP C 458 OD2 79.7 145.2 97.0 REMARK 620 5 ASP C 458 OD1 108.5 161.2 84.3 48.7 REMARK 620 N 1 2 3 4 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 SM C 804 SM REMARK 620 N RES CSSEQI ATOM REMARK 620 1 SER C 533 OG REMARK 620 2 VAL C 531 O 108.3 REMARK 620 3 ASP A 128 OD2 80.5 75.7 REMARK 620 4 ASP A 124 OD2 141.7 109.5 103.1 REMARK 620 5 ASP A 124 OD1 164.3 60.3 85.9 49.4 REMARK 620 N 1 2 3 4 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA C 805 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLU C 513 OE1 REMARK 620 2 GLU C 513 OE2 54.0 REMARK 620 3 HOH B 937 O 84.5 94.7 REMARK 620 4 SER B 267 O 118.5 66.8 85.4 REMARK 620 5 HOH B 943 O 86.2 108.6 142.5 130.4 REMARK 620 N 1 2 3 4

REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SM C 801 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SM B 802 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SM B 803 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SM C 804 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA C 805 REMARK 800 SITE_IDENTIFIER: AC6 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA A 806 REMARK 800 SITE_IDENTIFIER: AC7 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE TRS D 807

DBREF 1EXZ A 1 141 UNP P21583 SCF_HUMAN 26 166 DBREF 1EXZ B 201 341 UNP P21583 SCF_HUMAN 26 166 DBREF 1EXZ C 401 541 UNP P21583 SCF_HUMAN 26 166 DBREF 1EXZ D 601 741 UNP P21583 SCF_HUMAN 26 166

SEQRES 1 A 141 GLU GLY ILE CYS ARG ASN ARG VAL THR ASN ASN VAL LYS SEQRES 2 A 141 ASP VAL THR LYS LEU VAL ALA ASN LEU PRO LYS ASP TYR SEQRES 3 A 141 MET ILE THR LEU LYS TYR VAL PRO GLY MET ASP VAL LEU SEQRES 4 A 141 PRO SER HIS CYS TRP ILE SER GLU MET VAL VAL GLN LEU SEQRES 5 A 141 SER ASP SER LEU THR ASP LEU LEU ASP LYS PHE SER ASN SEQRES 6 A 141 ILE SER GLU GLY LEU SER ASN TYR SER ILE ILE ASP LYS SEQRES 7 A 141 LEU VAL ASN ILE VAL ASP ASP LEU VAL GLU CYS VAL LYS SEQRES 8 A 141 GLU ASN SER SER LYS ASP LEU LYS LYS SER PHE LYS SER SEQRES 9 A 141 PRO GLU PRO ARG LEU PHE THR PRO GLU GLU PHE PHE ARG SEQRES 10 A 141 ILE PHE ASN ARG SER ILE ASP ALA PHE LYS ASP PHE VAL SEQRES 11 A 141 VAL ALA SER GLU THR SER ASP CYS VAL VAL SER SEQRES 1 B 141 GLU GLY ILE CYS ARG ASN ARG VAL THR ASN ASN VAL LYS SEQRES 2 B 141 ASP VAL THR LYS LEU VAL ALA ASN LEU PRO LYS ASP TYR SEQRES 3 B 141 MET ILE THR LEU LYS TYR VAL PRO GLY MET ASP VAL LEU SEQRES 4 B 141 PRO SER HIS CYS TRP ILE SER GLU MET VAL VAL GLN LEU SEQRES 5 B 141 SER ASP SER LEU THR ASP LEU LEU ASP LYS PHE SER ASN SEQRES 6 B 141 ILE SER GLU GLY LEU SER ASN TYR SER ILE ILE ASP LYS SEQRES 7 B 141 LEU VAL ASN ILE VAL ASP ASP LEU VAL GLU CYS VAL LYS SEQRES 8 B 141 GLU ASN SER SER LYS ASP LEU LYS LYS SER PHE LYS SER SEQRES 9 B 141 PRO GLU PRO ARG LEU PHE THR PRO GLU GLU PHE PHE ARG SEQRES 10 B 141 ILE PHE ASN ARG SER ILE ASP ALA PHE LYS ASP PHE VAL SEQRES 11 B 141 VAL ALA SER GLU THR SER ASP CYS VAL VAL SER SEQRES 1 C 141 GLU GLY ILE CYS ARG ASN ARG VAL THR ASN ASN VAL LYS SEQRES 2 C 141 ASP VAL THR LYS LEU VAL ALA ASN LEU PRO LYS ASP TYR SEQRES 3 C 141 MET ILE THR LEU LYS TYR VAL PRO GLY MET ASP VAL LEU SEQRES 4 C 141 PRO SER HIS CYS TRP ILE SER GLU MET VAL VAL GLN LEU SEQRES 5 C 141 SER ASP SER LEU THR ASP LEU LEU ASP LYS PHE SER ASN SEQRES 6 C 141 ILE SER GLU GLY LEU SER ASN TYR SER ILE ILE ASP LYS SEQRES 7 C 141 LEU VAL ASN ILE VAL ASP ASP LEU VAL GLU CYS VAL LYS SEQRES 8 C 141 GLU ASN SER SER LYS ASP LEU LYS LYS SER PHE LYS SER SEQRES 9 C 141 PRO GLU PRO ARG LEU PHE THR PRO GLU GLU PHE PHE ARG SEQRES 10 C 141 ILE PHE ASN ARG SER ILE ASP ALA PHE LYS ASP PHE VAL SEQRES 11 C 141 VAL ALA SER GLU THR SER ASP CYS VAL VAL SER SEQRES 1 D 141 GLU GLY ILE CYS ARG ASN ARG VAL THR ASN ASN VAL LYS SEQRES 2 D 141 ASP VAL THR LYS LEU VAL ALA ASN LEU PRO LYS ASP TYR SEQRES 3 D 141 MET ILE THR LEU LYS TYR VAL PRO GLY MET ASP VAL LEU SEQRES 4 D 141 PRO SER HIS CYS TRP ILE SER GLU MET VAL VAL GLN LEU SEQRES 5 D 141 SER ASP SER LEU THR ASP LEU LEU ASP LYS PHE SER ASN SEQRES 6 D 141 ILE SER GLU GLY LEU SER ASN TYR SER ILE ILE ASP LYS SEQRES 7 D 141 LEU VAL ASN ILE VAL ASP ASP LEU VAL GLU CYS VAL LYS SEQRES 8 D 141 GLU ASN SER SER LYS ASP LEU LYS LYS SER PHE LYS SER SEQRES 9 D 141 PRO GLU PRO ARG LEU PHE THR PRO GLU GLU PHE PHE ARG SEQRES 10 D 141 ILE PHE ASN ARG SER ILE ASP ALA PHE LYS ASP PHE VAL SEQRES 11 D 141 VAL ALA SER GLU THR SER ASP CYS VAL VAL SER

HET SM C 801 1 HET SM B 802 1 HET SM B 803 1 HET SM C 804 1 HET CA C 805 1 HET CA A 806 1 HET TRS D 807 8

HETNAM SM SAMARIUM (III) ION HETNAM CA CALCIUM ION HETNAM TRS 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL

HETSYN TRS TRIS BUFFER

FORMUL 5 SM 4(SM 3+) FORMUL 9 CA 2(CA 2+) FORMUL 11 TRS C4 H12 N O3 1+ FORMUL 12 HOH *132(H2 O)

HELIX 1 1 ASN A 11 ASN A 21 1 11 HELIX 2 2 PRO A 40 CYS A 43 5 4 HELIX 3 3 TRP A 44 ASP A 61 1 18 HELIX 4 4 SER A 71 ASN A 93 1 23 HELIX 5 5 THR A 111 ASP A 128 1 18 HELIX 6 6 ASN B 211 ASN B 221 1 11 HELIX 7 7 PRO B 240 CYS B 243 5 4 HELIX 8 8 TRP B 244 ASP B 261 1 18 HELIX 9 9 SER B 271 VAL B 290 1 20 HELIX 10 10 THR B 311 ALA B 325 1 15 HELIX 11 11 LYS C 413 ASN C 421 1 9 HELIX 12 12 PRO C 440 CYS C 443 5 4 HELIX 13 13 TRP C 444 ASP C 461 1 18 HELIX 14 14 SER C 471 LYS C 491 1 21 HELIX 15 15 THR C 511 ALA C 525 1 15 HELIX 16 16 VAL D 612 ASN D 621 1 10 HELIX 17 17 ILE D 645 ASP D 661 1 17 HELIX 18 18 SER D 671 ASN D 693 1 23 HELIX 19 19 THR D 711 LYS D 727 1 17

SHEET 1 A 2 ILE A 28 TYR A 32 0 SHEET 2 A 2 GLU A 106 PHE A 110 -1 O GLU A 106 N TYR A 32 SHEET 1 B 2 ILE B 228 LYS B 231 0 SHEET 2 B 2 PRO B 307 PHE B 310 -1 O ARG B 308 N LEU B 230 SHEET 1 C 2 ILE C 428 LYS C 431 0 SHEET 2 C 2 PRO C 507 PHE C 510 -1 O ARG C 508 N LEU C 430 SHEET 1 D 2 ILE D 628 LYS D 631 0 SHEET 2 D 2 PRO D 707 PHE D 710 -1 N ARG D 708 O LEU D 630

SSBOND 1 CYS A 4 CYS A 89 1555 1555 2.03 SSBOND 2 CYS A 43 CYS A 138 1555 1555 2.03 SSBOND 3 CYS B 204 CYS B 289 1555 1555 2.04 SSBOND 4 CYS B 243 CYS B 338 1555 1555 2.03 SSBOND 5 CYS C 443 CYS C 538 1555 1555 2.03

LINK SM SM B 803 OD2 ASP B 337 1555 1555 2.17 LINK CA CA A 806 OD1 ASP A 58 1555 1555 3.29 LINK CA CA A 806 OD1 ASP A 54 1555 1555 2.04 LINK CA CA A 806 OD2 ASP A 54 1555 1555 2.74 LINK CA CA A 806 O HOH A 861 1555 1555 3.39 LINK SM SM B 802 OE2 GLU B 288 1555 1555 2.90 LINK SM SM B 802 OD1 ASP D 677 1555 1555 2.54 LINK SM SM B 802 OD1 ASP B 285 1555 1555 3.06 LINK SM SM B 802 NH1 ARG B 207 1555 1555 3.10 LINK SM SM B 802 OD2 ASP D 677 1555 1555 2.93 LINK SM SM B 803 OD1 ASP B 337 1555 1555 3.15 LINK SM SM B 803 O HOH B 859 1555 1555 2.47 LINK SM SM B 803 O VAL B 339 1555 1555 2.35 LINK SM SM C 801 OD2 ASP C 454 1555 1555 2.43 LINK SM SM C 801 O HOH C 946 1555 1555 1.92 LINK SM SM C 801 OD1 ASP C 454 1555 1555 2.49 LINK SM SM C 801 OD2 ASP C 458 1555 1555 2.45 LINK SM SM C 801 OD1 ASP C 458 1555 1555 2.81 LINK SM SM C 804 OG SER C 533 1555 1555 2.55 LINK SM SM C 804 O VAL C 531 1555 1555 2.70 LINK SM SM C 804 OD2 ASP A 128 1555 1555 2.61 LINK SM SM C 804 OD2 ASP A 124 1555 1555 2.71 LINK SM SM C 804 OD1 ASP A 124 1555 1555 2.53 LINK CA CA C 805 OE1 GLU C 513 1555 1555 2.46 LINK CA CA C 805 OE2 GLU C 513 1555 1555 2.42 LINK CA CA C 805 O HOH B 937 1555 1555 2.38 LINK CA CA C 805 O SER B 267 1555 1555 2.31 LINK CA CA C 805 O HOH B 943 1555 1555 2.91

SITE 1 AC1 3 ASP C 454 ASP C 458 HOH C 946 SITE 1 AC2 4 ARG B 207 ASP B 285 GLU B 288 ASP D 677 SITE 1 AC3 3 ASP B 337 VAL B 339 HOH B 859 SITE 1 AC4 5 ASP A 124 ASP A 128 PHE C 529 VAL C 531 SITE 2 AC4 5 SER C 533 SITE 1 AC5 4 SER B 267 HOH B 937 HOH B 943 GLU C 513 SITE 1 AC6 2 ASP A 54 ASP A 58 SITE 1 AC7 3 GLU B 288 ASN D 681 ASP D 685

CRYST1 36.154 87.526 79.434 90.00 97.76 90.00 P 1 21 1 8

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 0.027659 0.000000 0.003769 0.00000

SCALE2 0.000000 0.011425 0.000000 0.00000

SCALE3 0.000000 0.000000 0.012705 0.00000