HEADER ELECTRON TRANSPORT 18-NOV-97 1AZL TITLE G61V FLAVODOXIN MUTANT FROM DESULFOVIBRIO VULGARIS COMPND MOL_ID: 1; COMPND 2 MOLECULE: FLAVODOXIN; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES; COMPND 5 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: DESULFOVIBRIO VULGARIS SUBSP. VULGARIS STR. SOURCE 3 HILDENBOROUGH; SOURCE 4 ORGANISM_TAXID: 882; SOURCE 5 STRAIN: HILDENBOROUGH; SOURCE 6 ORGAN: SEED; SOURCE 7 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 8 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 9 EXPRESSION_SYSTEM_STRAIN: TG2; SOURCE 10 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 11 EXPRESSION_SYSTEM_PLASMID: PDK6 KEYWDS ELECTRON TRANSPORT, ELECTRON TRANSFER, FLAVOPROTEIN, FMN, FLAVODOXIN, KEYWDS 2 MUTANT EXPDTA X-RAY DIFFRACTION AUTHOR M.A.WALSH,A.MCCARTHY,P.A.O'FARRELL,G.VOORDOUW,T.HIGGINS,S.G.MAYHEW REVDAT 7 03-APR-24 1AZL 1 REMARK REVDAT 6 07-FEB-24 1AZL 1 REMARK REVDAT 5 03-NOV-21 1AZL 1 REMARK SEQADV REVDAT 4 24-FEB-09 1AZL 1 VERSN REVDAT 3 01-APR-03 1AZL 1 JRNL REVDAT 2 12-APR-99 1AZL 1 JRNL REMARK REVDAT 1 20-MAY-98 1AZL 0 JRNL AUTH P.A.O'FARRELL,M.A.WALSH,A.A.MCCARTHY,T.M.HIGGINS,G.VOORDOUW, JRNL AUTH 2 S.G.MAYHEW JRNL TITL MODULATION OF THE REDOX POTENTIALS OF FMN IN DESULFOVIBRIO JRNL TITL 2 VULGARIS FLAVODOXIN: THERMODYNAMIC PROPERTIES AND CRYSTAL JRNL TITL 3 STRUCTURES OF GLYCINE-61 MUTANTS. JRNL REF BIOCHEMISTRY V. 37 8405 1998 JRNL REFN ISSN 0006-2960 JRNL PMID 9622492 JRNL DOI 10.1021/BI973193K REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH W.WATT,A.TULINSKY,R.P.SWENSON,K.D.WATENPAUGH REMARK 1 TITL COMPARISON OF THE CRYSTAL STRUCTURES OF A FLAVODOXIN IN ITS REMARK 1 TITL 2 THREE OXIDATION STATES AT CRYOGENIC TEMPERATURES REMARK 1 REF J.MOL.BIOL. V. 218 195 1991 REMARK 1 REFN ISSN 0022-2836 REMARK 1 REFERENCE 2 REMARK 1 AUTH G.D.KREY,E.F.VANIN,R.P.SWENSON REMARK 1 TITL CLONING,NUCLEOTIDE SEQUENCE,AND EXPRESSION OF THE FLAVODOXIN REMARK 1 TITL 2 GENE FROM DESULFOVIBRIO VULGARIS (HILDENBOROUGH) REMARK 1 REF J.BIOL.CHEM. V. 263 15436 1988 REMARK 1 REFN ISSN 0021-9258 REMARK 1 REFERENCE 3 REMARK 1 AUTH G.P.CURLEY,G.VOORDOUW REMARK 1 TITL CLONING AND SEQUENCING OF THE GENE ENCODING FLAVODOXIN FROM REMARK 1 TITL 2 DESULFOVIBRIO VULGARIS HILDENBOROUGH REMARK 1 REF FEMS MICROBIOL.LETT. V. 49 295 1988 REMARK 1 REFN ISSN 0378-1097 REMARK 1 REFERENCE 4 REMARK 1 AUTH K.D.WATENPAUGH,L.C.SIEKER,L.H.JENSEN,J.LEGALL,M.DUBOURDIEU REMARK 1 TITL STRUCTURE OF THE OXIDIZED FORM OF A FLAVODOXIN AT REMARK 1 TITL 2 2.5-ANGSTROM RESOLUTION:RESOLUTION OF THE PHASE AMBIGUITY BY REMARK 1 TITL 3 ANOMALOUS SCATTERING REMARK 1 REF PROC.NATL.ACAD.SCI.USA V. 69 3185 1972 REMARK 1 REFN ISSN 0027-8424 REMARK 2 REMARK 2 RESOLUTION. 1.80 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CCP4 REMARK 3 AUTHORS : NULL REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.80 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 10.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 89.3 REMARK 3 NUMBER OF REFLECTIONS : 61954 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : NULL REMARK 3 R VALUE (WORKING + TEST SET) : NULL REMARK 3 R VALUE (WORKING SET) : 0.175 REMARK 3 FREE R VALUE : NULL REMARK 3 FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 FREE R VALUE TEST SET COUNT : NULL REMARK 3 REMARK 3 FIT/AGREEMENT OF MODEL WITH ALL DATA. REMARK 3 R VALUE (WORKING + TEST SET, NO CUTOFF) : NULL REMARK 3 R VALUE (WORKING SET, NO CUTOFF) : 0.1750 REMARK 3 FREE R VALUE (NO CUTOFF) : NULL REMARK 3 FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : NULL REMARK 3 FREE R VALUE TEST SET COUNT (NO CUTOFF) : NULL REMARK 3 TOTAL NUMBER OF REFLECTIONS (NO CUTOFF) : 61954 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 1107 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 31 REMARK 3 SOLVENT ATOMS : 126 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 18.50 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 24.50 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) : 0.19 REMARK 3 LOW RESOLUTION CUTOFF (A) : 10.0 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 DISTANCE RESTRAINTS. RMS SIGMA REMARK 3 BOND LENGTH (A) : 0.016 ; 0.020 REMARK 3 ANGLE DISTANCE (A) : 0.046 ; 0.040 REMARK 3 INTRAPLANAR 1-4 DISTANCE (A) : 0.045 ; 0.050 REMARK 3 H-BOND OR METAL COORDINATION (A) : NULL ; NULL REMARK 3 REMARK 3 PLANE RESTRAINT (A) : 0.014 ; 0.020 REMARK 3 CHIRAL-CENTER RESTRAINT (A**3) : 0.160 ; 0.150 REMARK 3 REMARK 3 NON-BONDED CONTACT RESTRAINTS. REMARK 3 SINGLE TORSION (A) : 0.190 ; 0.300 REMARK 3 MULTIPLE TORSION (A) : 0.250 ; 0.300 REMARK 3 H-BOND (X...Y) (A) : 0.180 ; 0.300 REMARK 3 H-BOND (X-H...Y) (A) : NULL ; NULL REMARK 3 REMARK 3 CONFORMATIONAL TORSION ANGLE RESTRAINTS. REMARK 3 SPECIFIED (DEGREES) : NULL ; NULL REMARK 3 PLANAR (DEGREES) : 2.400 ; 3.000 REMARK 3 STAGGERED (DEGREES) : 17.700; 15.000 REMARK 3 TRANSVERSE (DEGREES) : 24.800; 20.000 REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : 3.100 ; 4.000 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 4.200 ; 5.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 6.700 ; 6.000 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 9.800 ; 8.000 REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1AZL 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_1000171448. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : APR-92 REMARK 200 TEMPERATURE (KELVIN) : 277 REMARK 200 PH : 7.0 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : SRS REMARK 200 BEAMLINE : PX9.5 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.9 REMARK 200 MONOCHROMATOR : SI(111) REMARK 200 OPTICS : MIRROR REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : MARRESEARCH REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 12653 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.800 REMARK 200 RESOLUTION RANGE LOW (A) : 20.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : -3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 89.2 REMARK 200 DATA REDUNDANCY : 3.400 REMARK 200 R MERGE (I) : 0.06200 REMARK 200 R SYM (I) : 0.06200 REMARK 200 FOR THE DATA SET : 10.2000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.80 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.90 REMARK 200 COMPLETENESS FOR SHELL (%) : 79.9 REMARK 200 DATA REDUNDANCY IN SHELL : 3.40 REMARK 200 R MERGE FOR SHELL (I) : 0.49000 REMARK 200 R SYM FOR SHELL (I) : 0.49000 REMARK 200 FOR SHELL : 1.600 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: MERLOT REMARK 200 STARTING MODEL: RECOMBINANT FLAVODOXIN REMARK 200 REMARK 200 REMARK: MODEL USED WAS UNSUBMITTED REFINED FLAVODOXIN FROM REMARK 200 DESULFOVIBRIO FLAVODOXIN, IDENTICAL TO PDB ENTRY 2FX2 REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 53.00 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.60 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PROTEIN SEED CRYSTALS WERE OBTAINED REMARK 280 FROM 60-70% AMMONIUM SULFATE, 10MM TRIS PH 7.0, 1-2% ACETONE. REMARK 280 MACROSEEDS WERE TRANSFERRED TO THE ABOVE SOLUTION WITH NO REMARK 280 ACETONE PRESENT., MACROSEEDING REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 2 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,-Y,Z REMARK 290 3555 -X+1/2,Y+1/2,-Z 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 0.00000 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 28.24500 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 44.07000 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 28.24500 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 44.07000 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: MONOMERIC 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 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 O HOH A 207 O HOH A 207 2565 1.93 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 ARG A 24 CD - NE - CZ ANGL. DEV. = 19.4 DEGREES REMARK 500 ARG A 24 NE - CZ - NH1 ANGL. DEV. = 10.0 DEGREES REMARK 500 ARG A 24 NE - CZ - NH2 ANGL. DEV. = -7.1 DEGREES REMARK 500 ASP A 28 CB - CG - OD1 ANGL. DEV. = 9.3 DEGREES REMARK 500 GLU A 32 OE1 - CD - OE2 ANGL. DEV. = 8.3 DEGREES REMARK 500 ARG A 36 NE - CZ - NH2 ANGL. DEV. = -7.0 DEGREES REMARK 500 ASP A 37 CB - CG - OD1 ANGL. DEV. = 7.3 DEGREES REMARK 500 GLU A 48 OE1 - CD - OE2 ANGL. DEV. = -7.4 DEGREES REMARK 500 CYS A 57 N - CA - CB ANGL. DEV. = -20.7 DEGREES REMARK 500 ASP A 95 CB - CG - OD2 ANGL. DEV. = -6.9 DEGREES REMARK 500 GLU A 118 OE1 - CD - OE2 ANGL. DEV. = 8.1 DEGREES REMARK 500 GLN A 121 N - CA - CB ANGL. DEV. = -11.0 DEGREES REMARK 500 ARG A 125 NE - CZ - NH2 ANGL. DEV. = 4.1 DEGREES REMARK 500 ASP A 129 CB - CG - OD2 ANGL. DEV. = -5.5 DEGREES REMARK 500 ARG A 131 NE - CZ - NH1 ANGL. DEV. = 6.5 DEGREES REMARK 500 ARG A 131 NE - CZ - NH2 ANGL. DEV. = -5.8 DEGREES REMARK 500 ARG A 134 NE - CZ - NH2 ANGL. DEV. = -4.6 DEGREES REMARK 500 ASP A 135 CB - CG - OD2 ANGL. DEV. = -6.1 DEGREES REMARK 500 ARG A 145 CD - NE - CZ ANGL. DEV. = 10.5 DEGREES REMARK 500 ARG A 145 NE - CZ - NH1 ANGL. DEV. = 4.4 DEGREES 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 FMN A 149 DBREF 1AZL A 2 148 UNP P00323 FLAV_DESVH 2 148 SEQADV 1AZL VAL A 61 UNP P00323 GLY 61 ENGINEERED MUTATION SEQRES 1 A 147 PRO LYS ALA LEU ILE VAL TYR GLY SER THR THR GLY ASN SEQRES 2 A 147 THR GLU TYR THR ALA GLU THR ILE ALA ARG GLU LEU ALA SEQRES 3 A 147 ASP ALA GLY TYR GLU VAL ASP SER ARG ASP ALA ALA SER SEQRES 4 A 147 VAL GLU ALA GLY GLY LEU PHE GLU GLY PHE ASP LEU VAL SEQRES 5 A 147 LEU LEU GLY CYS SER THR TRP VAL ASP ASP SER ILE GLU SEQRES 6 A 147 LEU GLN ASP ASP PHE ILE PRO LEU PHE ASP SER LEU GLU SEQRES 7 A 147 GLU THR GLY ALA GLN GLY ARG LYS VAL ALA CYS PHE GLY SEQRES 8 A 147 CYS GLY ASP SER SER TYR GLU TYR PHE CYS GLY ALA VAL SEQRES 9 A 147 ASP ALA ILE GLU GLU LYS LEU LYS ASN LEU GLY ALA GLU SEQRES 10 A 147 ILE VAL GLN ASP GLY LEU ARG ILE ASP GLY ASP PRO ARG SEQRES 11 A 147 ALA ALA ARG ASP ASP ILE VAL GLY TRP ALA HIS ASP VAL SEQRES 12 A 147 ARG GLY ALA ILE HET FMN A 149 31 HETNAM FMN FLAVIN MONONUCLEOTIDE HETSYN FMN RIBOFLAVIN MONOPHOSPHATE FORMUL 2 FMN C17 H21 N4 O9 P FORMUL 3 HOH *126(H2 O) HELIX 1 1 GLY A 13 ASP A 28 1 16 HELIX 2 2 ASP A 70 THR A 81 1 12 HELIX 3 3 GLY A 103 LEU A 115 1 13 HELIX 4 4 ALA A 132 ILE A 148 1 17 SHEET 1 S1 5 TYR A 31 ALA A 38 0 SHEET 2 S1 5 PRO A 2 SER A 10 1 N ILE A 6 O ASP A 34 SHEET 3 S1 5 ASP A 51 TRP A 60 1 N GLY A 56 O VAL A 7 SHEET 4 S1 5 GLY A 85 ASP A 95 1 N ALA A 89 O VAL A 53 SHEET 5 S1 5 VAL A 120 ASP A 129 1 N VAL A 120 O VAL A 88 SITE 1 AC1 21 SER A 10 THR A 11 THR A 12 GLY A 13 SITE 2 AC1 21 ASN A 14 THR A 15 GLY A 44 SER A 58 SITE 3 AC1 21 THR A 59 TRP A 60 VAL A 61 CYS A 93 SITE 4 AC1 21 GLY A 94 ASP A 95 TYR A 98 TYR A 100 SITE 5 AC1 21 PHE A 101 CYS A 102 HOH A 153 HOH A 172 SITE 6 AC1 21 HOH A 185 CRYST1 56.490 88.140 35.190 90.00 90.00 90.00 P 21 21 2 4 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 0.017702 0.000000 0.000000 0.00000 SCALE2 0.000000 0.011346 0.000000 0.00000 SCALE3 0.000000 0.000000 0.028417 0.00000