HEADER CHEMOKINE 22-DEC-97 1A15 TITLE SDF-1ALPHA COMPND MOL_ID: 1; COMPND 2 MOLECULE: STROMAL DERIVED FACTOR-1ALPHA; COMPND 3 CHAIN: A, B; COMPND 4 SYNONYM: SDF-1; COMPND 5 ENGINEERED: YES; COMPND 6 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 SYNTHETIC: YES; SOURCE 3 OTHER_DETAILS: CHEMICALLY SYNTHESIZED KEYWDS CHEMOKINE, HUMAN STROMAL CELL-DERIVED FACTOR-1ALPHA EXPDTA X-RAY DIFFRACTION AUTHOR C.G.DEALWIS,E.J.FERNANDEZ,E.LOLIS REVDAT 4 23-OCT-24 1A15 1 REMARK REVDAT 3 03-NOV-21 1A15 1 REMARK SEQADV REVDAT 2 24-FEB-09 1A15 1 VERSN REVDAT 1 12-AUG-98 1A15 0 JRNL AUTH C.DEALWIS,E.J.FERNANDEZ,D.A.THOMPSON,R.J.SIMON,M.A.SIANI, JRNL AUTH 2 E.LOLIS JRNL TITL CRYSTAL STRUCTURE OF CHEMICALLY SYNTHESIZED [N33A] STROMAL JRNL TITL 2 CELL-DERIVED FACTOR 1ALPHA, A POTENT LIGAND FOR THE HIV-1 JRNL TITL 3 "FUSIN" CORECEPTOR. JRNL REF PROC.NATL.ACAD.SCI.USA V. 95 6941 1998 JRNL REFN ISSN 0027-8424 JRNL PMID 9618518 JRNL DOI 10.1073/PNAS.95.12.6941 REMARK 2 REMARK 2 RESOLUTION. 2.20 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR 3.843 REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.20 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 5.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 3.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : NULL REMARK 3 DATA CUTOFF LOW (ABS(F)) : NULL REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 95.0 REMARK 3 NUMBER OF REFLECTIONS : 5753 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : THROUGHOUT REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 R VALUE (WORKING SET) : 0.233 REMARK 3 FREE R VALUE : 0.298 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 10.000 REMARK 3 FREE R VALUE TEST SET COUNT : 575 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 : 8 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 2.20 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 2.30 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 92.00 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 85 REMARK 3 BIN R VALUE (WORKING SET) : 0.2600 REMARK 3 BIN FREE R VALUE : 0.3000 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 9.00 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 52 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 : 992 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 5 REMARK 3 SOLVENT ATOMS : 86 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 13.90 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) : 0.20 REMARK 3 LOW RESOLUTION CUTOFF (A) : 5.00 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) : 0.006 REMARK 3 BOND ANGLES (DEGREES) : 1.400 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 26.70 REMARK 3 IMPROPER ANGLES (DEGREES) : 1.200 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 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: BULK SOLVENT CORRECTION WAS USED DURING REMARK 3 SLOWCOOL AND POSITIONAL REFINEMENT IN XPLOR BETWEEN 25-2.2 REMARK 3 ANGSTROM RESOLUTION. REMARK 4 REMARK 4 1A15 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY BNL. REMARK 100 THE DEPOSITION ID IS D_1000170263. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : SEP-97 REMARK 200 TEMPERATURE (KELVIN) : 133 REMARK 200 PH : 8.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : NSLS REMARK 200 BEAMLINE : X12B REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.95 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : MAR SCANNER 300 MM PLATE REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 8725 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.200 REMARK 200 RESOLUTION RANGE LOW (A) : 25.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 97.6 REMARK 200 DATA REDUNDANCY : 2.700 REMARK 200 R MERGE (I) : 0.04600 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 9.3000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.20 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.24 REMARK 200 COMPLETENESS FOR SHELL (%) : 99.0 REMARK 200 DATA REDUNDANCY IN SHELL : 2.70 REMARK 200 R MERGE FOR SHELL (I) : 0.08700 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : 3.100 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MULTIPLE ISOMORPHOUS REMARK 200 REPLACEMENT WITH ANOMALOUS SCATTERING (MIRAS) REMARK 200 SOFTWARE USED: X-PLOR 3.843 REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 35.00 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.22 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PROTEIN CONCENTRATION 10MG/ML. WELL REMARK 280 SOLUTION 1.9M AMMONIUM SULFATE 0.1M TRIS-HCL PH 8.5. REMARK 280 CRYSTALLIZED USING VAPOR DIFFUSION., VAPOR DIFFUSION REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 21 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X+1/2,-Y,Z+1/2 REMARK 290 3555 -X,Y+1/2,-Z+1/2 REMARK 290 4555 X+1/2,-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 19.42000 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 32.36000 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 25.23500 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 32.36000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 19.42000 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 25.23500 REMARK 290 SMTRY3 4 0.000000 0.000000 -1.000000 0.00000 REMARK 290 REMARK 290 REMARK: NULL 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 TOTAL BURIED SURFACE AREA: 1640 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 8170 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -19.0 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 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 LYS B 1 REMARK 465 PRO B 2 REMARK 465 VAL B 3 REMARK 465 SER B 4 REMARK 465 LEU B 5 REMARK 465 SER B 6 REMARK 465 TYR B 7 REMARK 465 ALA B 65 REMARK 465 LEU B 66 REMARK 465 ASN B 67 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 VAL A 3 CG1 CG2 REMARK 470 ARG A 8 CG CD NE CZ NH1 NH2 REMARK 470 ASN A 67 CG OD1 ND2 REMARK 470 ARG B 8 CG CD NE CZ NH1 NH2 REMARK 470 GLU B 63 CG CD OE1 OE2 REMARK 470 LYS B 64 CG CD CE NZ REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT REMARK 500 REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT. REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI DISTANCE REMARK 500 O VAL A 3 OG SER A 6 1.85 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS REMARK 500 REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 STANDARD TABLE: REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3) REMARK 500 REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999 REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996 REMARK 500 REMARK 500 M RES CSSEQI ATM1 RES CSSEQI ATM2 DEVIATION REMARK 500 PRO A 2 C VAL A 3 N -0.296 REMARK 500 TYR A 7 C ARG A 8 N 0.265 REMARK 500 LEU B 62 C GLU B 63 N 0.243 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: COVALENT BOND ANGLES REMARK 500 REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 STANDARD TABLE: REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1) REMARK 500 REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999 REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996 REMARK 500 REMARK 500 M RES CSSEQI ATM1 ATM2 ATM3 REMARK 500 LEU B 62 CA - C - N ANGL. DEV. = -16.6 DEGREES REMARK 500 GLU B 63 N - CA - C ANGL. DEV. = 21.6 DEGREES 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 SER A 6 -25.53 -140.18 REMARK 500 TYR A 7 78.48 -108.99 REMARK 500 ALA A 35 -166.93 64.00 REMARK 500 ASN A 46 18.91 58.69 REMARK 500 LYS A 54 4.04 -69.32 REMARK 500 ALA B 33 -26.08 104.45 REMARK 500 ASN B 44 -41.17 70.19 REMARK 500 GLU B 63 157.57 26.59 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: MAIN CHAIN PLANARITY REMARK 500 REMARK 500 THE FOLLOWING RESIDUES HAVE A PSEUDO PLANARITY REMARK 500 TORSION ANGLE, C(I) - CA(I) - N(I+1) - O(I), GREATER REMARK 500 10.0 DEGREES. (M=MODEL NUMBER; RES=RESIDUE NAME; REMARK 500 C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; REMARK 500 I=INSERTION CODE). REMARK 500 REMARK 500 M RES CSSEQI ANGLE REMARK 500 LEU B 62 -19.17 REMARK 500 REMARK 500 REMARK: NULL REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 0 DBREF 1A15 A 1 67 UNP P48061 SDF1_HUMAN 22 88 DBREF 1A15 B 1 67 UNP P48061 SDF1_HUMAN 22 88 SEQADV 1A15 ALA A 33 UNP P48061 ASN 54 ENGINEERED MUTATION SEQADV 1A15 ALA B 33 UNP P48061 ASN 54 ENGINEERED MUTATION SEQRES 1 A 67 LYS PRO VAL SER LEU SER TYR ARG CYS PRO CYS ARG PHE SEQRES 2 A 67 PHE GLU SER HIS VAL ALA ARG ALA ASN VAL LYS HIS LEU SEQRES 3 A 67 LYS ILE LEU ASN THR PRO ALA CYS ALA LEU GLN ILE VAL SEQRES 4 A 67 ALA ARG LEU LYS ASN ASN ASN ARG GLN VAL CYS ILE ASP SEQRES 5 A 67 PRO LYS LEU LYS TRP ILE GLN GLU TYR LEU GLU LYS ALA SEQRES 6 A 67 LEU ASN SEQRES 1 B 67 LYS PRO VAL SER LEU SER TYR ARG CYS PRO CYS ARG PHE SEQRES 2 B 67 PHE GLU SER HIS VAL ALA ARG ALA ASN VAL LYS HIS LEU SEQRES 3 B 67 LYS ILE LEU ASN THR PRO ALA CYS ALA LEU GLN ILE VAL SEQRES 4 B 67 ALA ARG LEU LYS ASN ASN ASN ARG GLN VAL CYS ILE ASP SEQRES 5 B 67 PRO LYS LEU LYS TRP ILE GLN GLU TYR LEU GLU LYS ALA SEQRES 6 B 67 LEU ASN HET SO4 A 0 5 HETNAM SO4 SULFATE ION FORMUL 3 SO4 O4 S 2- FORMUL 4 HOH *86(H2 O) HELIX 1 1 ARG A 20 ASN A 22 5 3 HELIX 2 2 TRP A 57 LYS A 64 1 8 HELIX 3 3 ARG B 20 ASN B 22 5 3 HELIX 4 4 ILE B 58 TYR B 61 1 4 SHEET 1 A 3 GLN A 48 ILE A 51 0 SHEET 2 A 3 ALA A 35 LEU A 42 -1 N ALA A 40 O VAL A 49 SHEET 3 A 3 VAL A 23 THR A 31 -1 N THR A 31 O ALA A 35 SHEET 1 B 3 GLN B 48 CYS B 50 0 SHEET 2 B 3 ILE B 38 LEU B 42 -1 N ALA B 40 O VAL B 49 SHEET 3 B 3 VAL B 23 ILE B 28 -1 N LYS B 27 O VAL B 39 SSBOND 1 CYS A 9 CYS A 34 1555 1555 2.39 SSBOND 2 CYS A 11 CYS A 50 1555 1555 2.35 SSBOND 3 CYS B 9 CYS B 34 1555 1555 2.39 SSBOND 4 CYS B 11 CYS B 50 1555 1555 2.35 SITE 1 AC1 7 ALA A 19 ARG A 20 ALA A 21 HOH A 82 SITE 2 AC1 7 HOH A 84 LYS B 24 ASN B 46 CRYST1 38.840 50.470 64.720 90.00 90.00 90.00 P 21 21 21 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 0.025747 0.000000 0.000000 0.00000 SCALE2 0.000000 0.019814 0.000000 0.00000 SCALE3 0.000000 0.000000 0.015451 0.00000