HEADER OXYGEN STORAGE 28-JAN-97 1ABS TITLE PHOTOLYSED CARBONMONOXY-MYOGLOBIN AT 20 K COMPND MOL_ID: 1; COMPND 2 MOLECULE: MYOGLOBIN; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES; COMPND 5 MUTATION: YES; COMPND 6 OTHER_DETAILS: HEME BOUND TO HIS-93, PHOTOLYSED CO ATOP HEME SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: PHYSETER CATODON; SOURCE 3 ORGANISM_COMMON: SPERM WHALE; SOURCE 4 ORGANISM_TAXID: 9755; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 7 OTHER_DETAILS: SYNTHETIC GENE KEYWDS OXYGEN STORAGE, INTERMEDIATE IN LIGAND BINDING, RESPIRATORY PROTEIN EXPDTA X-RAY DIFFRACTION AUTHOR I.SCHLICHTING,J.BERENDZEN,G.N.PHILLIPS JR.,R.M.SWEET REVDAT 6 22-MAY-24 1ABS 1 REMARK REVDAT 5 02-AUG-23 1ABS 1 REMARK LINK REVDAT 4 24-FEB-09 1ABS 1 VERSN REVDAT 3 03-MAY-05 1ABS 1 AUTHOR JRNL REMARK REVDAT 2 01-APR-03 1ABS 1 JRNL REVDAT 1 01-APR-97 1ABS 0 JRNL AUTH I.SCHLICHTING,J.BERENDZEN,G.N.PHILLIPS JR.,R.M.SWEET JRNL TITL CRYSTAL STRUCTURE OF PHOTOLYSED CARBONMONOXY-MYOGLOBIN. JRNL REF NATURE V. 371 808 1994 JRNL REFN ISSN 0028-0836 JRNL PMID 7935843 JRNL DOI 10.1038/371808A0 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH G.N.PHILLIPS JR.,R.M.ARDUINI,B.A.SPRINGER,S.G.SLIGAR REMARK 1 TITL CRYSTAL STRUCTURE OF MYOGLOBIN FROM A SYNTHETIC GENE REMARK 1 REF PROTEINS V. 7 358 1990 REMARK 1 REFN ISSN 0887-3585 REMARK 1 REFERENCE 2 REMARK 1 AUTH B.A.SPRINGER,S.G.SLIGAR REMARK 1 TITL HIGH-LEVEL EXPRESSION OF SPERM WHALE MYOGLOBIN IN REMARK 1 TITL 2 ESCHERICHIA COLI REMARK 1 REF PROC.NATL.ACAD.SCI.USA V. 84 8961 1987 REMARK 1 REFN ISSN 0027-8424 REMARK 2 REMARK 2 RESOLUTION. 1.50 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR 3.1 REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.50 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 7.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 10000000.000 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 89.0 REMARK 3 NUMBER OF REFLECTIONS : 29798 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 SET) : 0.207 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 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) : 1.50 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.57 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 79.50 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 3348 REMARK 3 BIN R VALUE (WORKING SET) : 0.2630 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 : 1225 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 50 REMARK 3 SOLVENT ATOMS : 118 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 6.40 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) : 0.06 REMARK 3 LOW RESOLUTION CUTOFF (A) : 7.00 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) : 0.010 REMARK 3 BOND ANGLES (DEGREES) : 1.700 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 NCS MODEL : N.A 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 : PROLSQ.PRO REMARK 3 PARAMETER FILE 2 : PARAM19X.HEME REMARK 3 PARAMETER FILE 3 : PARAM19.SOL REMARK 3 PARAMETER FILE 4 : SO4.PARM REMARK 3 PARAMETER FILE 5 : NULL REMARK 3 TOPOLOGY FILE 1 : TOPH19X.PRO REMARK 3 TOPOLOGY FILE 2 : TOPH19X.HEME REMARK 3 TOPOLOGY FILE 3 : TOPH19.SOL REMARK 3 TOPOLOGY FILE 4 : SO4.TOP REMARK 3 TOPOLOGY FILE 5 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: HEME PARAMETERS WERE RELAXED TO ALLOW REMARK 3 FOR REFINEMENT OF UNLIGATED, PHOTOLYSED, AND CO-BOUND COMPLEX. REMARK 4 REMARK 4 1ABS 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_1000170631. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : MAR-94 REMARK 200 TEMPERATURE (KELVIN) : 20 REMARK 200 PH : 9.0 REMARK 200 NUMBER OF CRYSTALS USED : 2 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : NSLS REMARK 200 BEAMLINE : X12C REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.91 REMARK 200 MONOCHROMATOR : YES REMARK 200 OPTICS : YES REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE AREA DETECTOR REMARK 200 DETECTOR MANUFACTURER : MARRESEARCH REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK, XSCALE REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 30947 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.500 REMARK 200 RESOLUTION RANGE LOW (A) : NULL REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 90.0 REMARK 200 DATA REDUNDANCY : 3.000 REMARK 200 R MERGE (I) : 0.06300 REMARK 200 R SYM (I) : 0.06800 REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : NULL REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.50 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.70 REMARK 200 COMPLETENESS FOR SHELL (%) : 78.0 REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: DIFFERENCE FOURIER REMARK 200 SOFTWARE USED: X-PLOR 3.1 REMARK 200 STARTING MODEL: 2MGK REMARK 200 REMARK 200 REMARK: DATA WERE COLLECTED UNDER CONTINUOUS ILLUMINATION USING AN REMARK 200 OPEN FLOW HELIUM CRYOSTAT FOR COOLING. REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 60.12 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.08 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PROTEIN WAS CRYSTALLIZED FROM 3.6 M REMARK 280 AMMONIUM SULFATE. CRYSTALS WER SOAKED FOR 1 HOUR IN A THOROUGHLY REMARK 280 DEGASSED AND N2 - SATURATED CRYOPROTECTANT SOLUTION MADE BY REMARK 280 ADDITION OF 100 MG SUCROSE, 100 MG GLUCOSE AND 8 MG NA- REMARK 280 DITHIONATE TO 1 ML OF 70% SATURATED AMMONIUM SULFATE WITH 50 MM REMARK 280 TRIS. HCL PH 9.0. THEN THE SOLUTION WAS EXCHANGED AGAINST A CO REMARK 280 SATURATED ONE. DISTINCT COLOR CHANGES ACCOMPANIED THE FORMATION REMARK 280 OF UNLIGATED MYOGLOBIN FROM MET-MB AND MBCO FROM UNLIGATED MB. REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 6 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -Y,X-Y,Z REMARK 290 3555 -X+Y,-X,Z REMARK 290 4555 -X,-Y,Z REMARK 290 5555 Y,-X+Y,Z REMARK 290 6555 X-Y,X,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 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 2 0.866025 -0.500000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 3 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 3 -0.866025 -0.500000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 4 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 4 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 5 0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 5 -0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 5 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 6 0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 6 0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 6 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: 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 HIS A 48 NE2 HIS A 48 CD2 -0.068 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 TRP A 7 CD1 - CG - CD2 ANGL. DEV. = 6.6 DEGREES REMARK 500 TRP A 7 CE2 - CD2 - CG ANGL. DEV. = -5.6 DEGREES REMARK 500 TRP A 14 CD1 - CG - CD2 ANGL. DEV. = 6.3 DEGREES REMARK 500 TRP A 14 CE2 - CD2 - CG ANGL. DEV. = -5.0 DEGREES REMARK 500 ARG A 45 NE - CZ - NH2 ANGL. DEV. = -4.1 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 ASP A 20 70.98 -162.04 REMARK 500 LYS A 98 67.13 62.92 REMARK 500 TYR A 151 -53.12 -122.04 REMARK 500 GLN A 152 33.40 35.16 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 ALA A 94 -10.22 REMARK 500 GLY A 150 -11.03 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 HEM A 154 FE REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS A 93 NE2 REMARK 620 2 HEM A 154 NA 97.9 REMARK 620 3 HEM A 154 NB 92.9 89.6 REMARK 620 4 HEM A 154 NC 93.2 168.9 89.8 REMARK 620 5 HEM A 154 ND 98.1 89.0 168.9 89.5 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 SO4 A 156 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HEM A 154 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CMO A 155 DBREF 1ABS A 0 153 UNP P02185 MYG_PHYCA 1 154 SEQRES 1 A 154 MET VAL LEU SER GLU GLY GLU TRP GLN LEU VAL LEU HIS SEQRES 2 A 154 VAL TRP ALA LYS VAL GLU ALA ASP VAL ALA GLY HIS GLY SEQRES 3 A 154 GLN ASP ILE LEU ILE ARG LEU PHE LYS SER HIS PRO GLU SEQRES 4 A 154 THR LEU GLU LYS PHE ASP ARG PHE LYS HIS LEU LYS THR SEQRES 5 A 154 GLU ALA GLU MET LYS ALA SER GLU ASP LEU LYS LYS HIS SEQRES 6 A 154 GLY VAL THR VAL LEU THR ALA LEU GLY ALA ILE LEU LYS SEQRES 7 A 154 LYS LYS GLY HIS HIS GLU ALA GLU LEU LYS PRO LEU ALA SEQRES 8 A 154 GLN SER HIS ALA THR LYS HIS LYS ILE PRO ILE LYS TYR SEQRES 9 A 154 LEU GLU PHE ILE SER GLU ALA ILE ILE HIS VAL LEU HIS SEQRES 10 A 154 SER ARG HIS PRO GLY ASN PHE GLY ALA ASP ALA GLN GLY SEQRES 11 A 154 ALA MET ASN LYS ALA LEU GLU LEU PHE ARG LYS ASP ILE SEQRES 12 A 154 ALA ALA LYS TYR LYS GLU LEU GLY TYR GLN GLY HET SO4 A 156 5 HET HEM A 154 43 HET CMO A 155 2 HETNAM SO4 SULFATE ION HETNAM HEM PROTOPORPHYRIN IX CONTAINING FE HETNAM CMO CARBON MONOXIDE HETSYN HEM HEME FORMUL 2 SO4 O4 S 2- FORMUL 3 HEM C34 H32 FE N4 O4 FORMUL 4 CMO C O FORMUL 5 HOH *118(H2 O) HELIX 1 A SER A 3 GLU A 18 1 16 HELIX 2 B ASP A 20 SER A 35 1 16 HELIX 3 C HIS A 36 LYS A 42 1 7 HELIX 4 D THR A 51 ALA A 57 1 7 HELIX 5 E SER A 58 LYS A 77 1 20 HELIX 6 F LEU A 86 THR A 95 1 10 HELIX 7 G PRO A 100 ARG A 118 1 19 HELIX 8 H GLY A 124 LEU A 149 1 26 LINK NE2 HIS A 93 FE HEM A 154 1555 1555 2.25 SITE 1 AC1 6 SER A 3 GLU A 4 THR A 51 GLU A 52 SITE 2 AC1 6 ALA A 53 HOH A 425 SITE 1 AC2 17 LYS A 42 PHE A 43 ARG A 45 HIS A 64 SITE 2 AC2 17 VAL A 68 ALA A 71 LEU A 89 SER A 92 SITE 3 AC2 17 HIS A 93 HIS A 97 ILE A 99 TYR A 103 SITE 4 AC2 17 CMO A 155 HOH A 242 HOH A 303 HOH A 308 SITE 5 AC2 17 HOH A 309 SITE 1 AC3 5 LEU A 29 PHE A 43 VAL A 68 ILE A 107 SITE 2 AC3 5 HEM A 154 CRYST1 90.420 90.420 45.400 90.00 90.00 120.00 P 6 6 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 0.011060 0.006385 0.000000 0.00000 SCALE2 0.000000 0.012770 0.000000 0.00000 SCALE3 0.000000 0.000000 0.022026 0.00000