PDB Short entry for 1DUO HEADER OXIDOREDUCTASE 18-JAN-00 1DUO TITLE SPERM WHALE METAQUOMYOGLOBIN PROXIMAL HISTIDINE MUTANT H93G WITH 1- TITLE 2 METHYLIMIDAZOLE AS PROXIMAL LIGAND. COMPND MOL_ID: 1; COMPND 2 MOLECULE: SPERM WHALE METAQUOMYOGLOBIN VARIANT H93G; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES; COMPND 5 MUTATION: YES; COMPND 6 OTHER_DETAILS: HEME IS BOUND TO THE PROTEIN DURING BACTERIAL COMPND 7 EXPRESSION 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 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 8 EXPRESSION_SYSTEM_PLASMID: P413B KEYWDS MYOGLOBIN, LIGAND SUBSTITUTION, HEME PROTEIN, OXIDOREDUCTASE EXPDTA X-RAY DIFFRACTION AUTHOR D.BARRICK,F.W.DAHLQUIST REVDAT 8 07-FEB-24 1DUO 1 REMARK SEQADV REVDAT 7 15-MAY-19 1DUO 1 SOURCE ATOM REVDAT 6 14-MAR-18 1DUO 1 SEQADV REVDAT 5 24-FEB-09 1DUO 1 VERSN REVDAT 4 01-APR-03 1DUO 1 JRNL REVDAT 3 27-DEC-00 1DUO 1 REMARK REVDAT 2 14-JUN-00 1DUO 1 JRNL REVDAT 1 07-FEB-00 1DUO 0 JRNL AUTH D.BARRICK,F.W.DAHLQUIST JRNL TITL TRANS-SUBSTITUTION OF THE PROXIMAL HYDROGEN BOND IN JRNL TITL 2 MYOGLOBIN: I. STRUCTURAL CONSEQUENCES OF HYDROGEN BOND JRNL TITL 3 DELETION. JRNL REF PROTEINS V. 39 278 2000 JRNL REFN ISSN 0887-3585 JRNL PMID 10813811 JRNL DOI 10.1002/(SICI)1097-0134(20000601)39:4<278::AID-PROT20>3.0.CO JRNL DOI 2 ;2-T REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH D.BARRICK REMARK 1 TITL TRANS-SUBSTITUTION OF THE PROXIMAL HYDROGEN BOND IN REMARK 1 TITL 2 MYOGLOBIN: II. ENERGETICS, FUNCTIONAL CONSEQUENCES, AND REMARK 1 TITL 3 IMPLICATIONS FOR HEMOGLOBIN ALLOSTERY. REMARK 1 REF TO BE PUBLISHED REMARK 1 REFN REMARK 2 REMARK 2 RESOLUTION. 2.00 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : TNT REMARK 3 AUTHORS : TRONRUD,TEN EYCK,MATTHEWS REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.00 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 20.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 COMPLETENESS FOR RANGE (%) : 76.0 REMARK 3 NUMBER OF REFLECTIONS : 9290 REMARK 3 REMARK 3 USING DATA ABOVE SIGMA CUTOFF. 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) : 0.181 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 USING ALL DATA, NO SIGMA CUTOFF. REMARK 3 R VALUE (WORKING + TEST SET, NO CUTOFF) : NULL REMARK 3 R VALUE (WORKING SET, NO CUTOFF) : 0.1810 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) : 9290 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 1178 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 49 REMARK 3 SOLVENT ATOMS : 24 REMARK 3 REMARK 3 WILSON B VALUE (FROM FCALC, A**2) : 17.300 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. RMS WEIGHT COUNT REMARK 3 BOND LENGTHS (A) : 0.020 ; NULL ; NULL REMARK 3 BOND ANGLES (DEGREES) : 3.000 ; NULL ; NULL REMARK 3 TORSION ANGLES (DEGREES) : NULL ; NULL ; NULL REMARK 3 PSEUDOROTATION ANGLES (DEGREES) : NULL ; NULL ; NULL REMARK 3 TRIGONAL CARBON PLANES (A) : NULL ; NULL ; NULL REMARK 3 GENERAL PLANES (A) : NULL ; NULL ; NULL REMARK 3 ISOTROPIC THERMAL FACTORS (A**2) : NULL ; NULL ; NULL REMARK 3 NON-BONDED CONTACTS (A) : NULL ; NULL ; NULL REMARK 3 REMARK 3 INCORRECT CHIRAL-CENTERS (COUNT) : 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 RESTRAINT LIBRARIES. REMARK 3 STEREOCHEMISTRY : BOND LENGTH 0.02 ANGSTROMS; BOND ANGLES 3 REMARK 3 DEGREES; TRIG PLANES 0.02, GENERAL PLANES 0.02; REMARK 3 B-CORRELATION 6.0 ANGSTROMS SQUARED. REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1DUO COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 24-JAN-00. REMARK 100 THE DEPOSITION ID IS D_1000010385. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 29-NOV-94 REMARK 200 TEMPERATURE (KELVIN) : 298.0 REMARK 200 PH : 6.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : N REMARK 200 RADIATION SOURCE : ROTATING ANODE REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : RIGAKU RU200 REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.54 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : AREA DETECTOR REMARK 200 DETECTOR MANUFACTURER : SDMS REMARK 200 INTENSITY-INTEGRATION SOFTWARE : SDMS REMARK 200 DATA SCALING SOFTWARE : SDMS REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 9290 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.000 REMARK 200 RESOLUTION RANGE LOW (A) : 20.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 76.0 REMARK 200 DATA REDUNDANCY : 2.190 REMARK 200 R MERGE (I) : 0.05600 REMARK 200 R SYM (I) : NULL REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 9.7000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.00 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.15 REMARK 200 COMPLETENESS FOR SHELL (%) : 71.1 REMARK 200 DATA REDUNDANCY IN SHELL : 1.36 REMARK 200 R MERGE FOR SHELL (I) : 0.18200 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL REMARK 200 SOFTWARE USED: TNT REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 45.90 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.27 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 35 % PEG 8000, 0.3 M NAOAC, 0.1 M REMARK 280 PIPES, AND 0.1 % DIOXANE, PH 6.5, VAPOR DIFFUSION, HANGING DROP 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 20.08050 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 39.62000 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 24.51650 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 39.62000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 20.08050 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 24.51650 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 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 GLY A 153 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 LYS A 34 CD CE NZ REMARK 470 ARG A 45 CB CG CD NE CZ NH1 NH2 REMARK 470 LYS A 47 CB CG CD CE NZ REMARK 470 LYS A 62 CE NZ REMARK 470 GLN A 91 CG CD OE1 NE2 REMARK 470 LYS A 140 CD CE NZ REMARK 470 LYS A 145 CE NZ REMARK 470 LYS A 147 CE NZ 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 GLU A 4 CD GLU A 4 OE2 0.078 REMARK 500 GLU A 6 CD GLU A 6 OE2 0.070 REMARK 500 GLU A 18 CD GLU A 18 OE2 0.079 REMARK 500 GLU A 38 CD GLU A 38 OE2 0.078 REMARK 500 GLU A 41 CD GLU A 41 OE2 0.068 REMARK 500 GLU A 54 CD GLU A 54 OE2 0.075 REMARK 500 GLU A 83 CD GLU A 83 OE2 0.074 REMARK 500 GLU A 109 CD GLU A 109 OE2 0.082 REMARK 500 GLU A 136 CD GLU A 136 OE2 0.067 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 ASP A 20 CB - CG - OD1 ANGL. DEV. = 7.8 DEGREES REMARK 500 ASP A 20 CB - CG - OD2 ANGL. DEV. = -7.2 DEGREES REMARK 500 ASP A 44 CB - CG - OD1 ANGL. DEV. = 6.2 DEGREES REMARK 500 ASP A 44 CB - CG - OD2 ANGL. DEV. = -6.9 DEGREES REMARK 500 ARG A 118 CD - NE - CZ ANGL. DEV. = 17.6 DEGREES REMARK 500 ARG A 118 NE - CZ - NH1 ANGL. DEV. = 10.9 DEGREES REMARK 500 ARG A 118 NE - CZ - NH2 ANGL. DEV. = -10.9 DEGREES REMARK 500 ASP A 122 CB - CG - OD2 ANGL. DEV. = -6.5 DEGREES REMARK 500 TYR A 146 CB - CG - CD2 ANGL. DEV. = 3.7 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 65.58 -161.33 REMARK 500 LYS A 96 -61.13 -100.74 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 1MZ A 155 N3 REMARK 620 2 HEM A 154 NA 77.6 REMARK 620 3 HEM A 154 NB 92.8 86.0 REMARK 620 4 HEM A 154 NC 102.2 176.2 90.2 REMARK 620 5 HEM A 154 ND 83.4 92.6 176.2 91.1 REMARK 620 6 HOH A 156 O 174.4 100.7 92.4 79.9 91.4 REMARK 620 N 1 2 3 4 5 REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HEM A 154 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE 1MZ A 155 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1IRC RELATED DB: PDB REMARK 900 SPERM WHALE METAQUOMYOGLOBIN PROXIMAL HISTIDINE MUTANT H93G WITH REMARK 900 IMIDAZOLE AS PROXIMAL LIGAND. SAME CRYSTALLIZATION CONDITIONS AND REMARK 900 REFINEMENT PROCEDURES. REMARK 900 RELATED ID: 1DTM RELATED DB: PDB REMARK 900 SPERM WHALE METAQUOMYOGLOBIN PROXIMAL HISTIDINE MUTANT H93G WITH 4- REMARK 900 METHYLIMIDAZOLE AS PROXIMAL LIGAND. SAME CRYSTALLIZATION CONDITIONS REMARK 900 AND REFINEMENT PROCEDURES. REMARK 900 RELATED ID: 1DUK RELATED DB: PDB REMARK 900 WILD-TYPE SPERM WHALE METAQUOMYOGLOBIN. SAME CRYSTALLIZATION REMARK 900 CONDITIONS AND REFINEMENT PROCEDURES. DBREF 1DUO A 1 153 UNP P02185 MYG_PHYCA 1 153 SEQADV 1DUO GLY A 93 UNP P02185 HIS 93 ENGINEERED MUTATION SEQRES 1 A 153 VAL LEU SER GLU GLY GLU TRP GLN LEU VAL LEU HIS VAL SEQRES 2 A 153 TRP ALA LYS VAL GLU ALA ASP VAL ALA GLY HIS GLY GLN SEQRES 3 A 153 ASP ILE LEU ILE ARG LEU PHE LYS SER HIS PRO GLU THR SEQRES 4 A 153 LEU GLU LYS PHE ASP ARG PHE LYS HIS LEU LYS THR GLU SEQRES 5 A 153 ALA GLU MET LYS ALA SER GLU ASP LEU LYS LYS HIS GLY SEQRES 6 A 153 VAL THR VAL LEU THR ALA LEU GLY ALA ILE LEU LYS LYS SEQRES 7 A 153 LYS GLY HIS HIS GLU ALA GLU LEU LYS PRO LEU ALA GLN SEQRES 8 A 153 SER GLY ALA THR LYS HIS LYS ILE PRO ILE LYS TYR LEU SEQRES 9 A 153 GLU PHE ILE SER GLU ALA ILE ILE HIS VAL LEU HIS SER SEQRES 10 A 153 ARG HIS PRO GLY ASP PHE GLY ALA ASP ALA GLN GLY ALA SEQRES 11 A 153 MET ASN LYS ALA LEU GLU LEU PHE ARG LYS ASP ILE ALA SEQRES 12 A 153 ALA LYS TYR LYS GLU LEU GLY TYR GLN GLY HET HEM A 154 43 HET 1MZ A 155 6 HETNAM HEM PROTOPORPHYRIN IX CONTAINING FE HETNAM 1MZ 1-METHYLIMIDAZOLE HETSYN HEM HEME FORMUL 2 HEM C34 H32 FE N4 O4 FORMUL 3 1MZ C4 H7 N2 1+ FORMUL 4 HOH *24(H2 O) HELIX 1 1 SER A 3 ALA A 19 1 17 HELIX 2 2 ASP A 20 HIS A 36 1 17 HELIX 3 3 HIS A 36 GLU A 41 1 6 HELIX 4 4 THR A 51 SER A 58 1 8 HELIX 5 5 SER A 58 LYS A 77 1 20 HELIX 6 6 HIS A 82 LYS A 96 1 15 HELIX 7 7 PRO A 100 HIS A 119 1 20 HELIX 8 8 PRO A 120 PHE A 123 5 4 HELIX 9 9 GLY A 124 LEU A 149 1 26 LINK FE HEM A 154 N3 1MZ A 155 1555 1555 2.14 LINK FE HEM A 154 O HOH A 156 1555 1555 2.22 SITE 1 AC1 9 LYS A 42 PHE A 43 SER A 92 HIS A 97 SITE 2 AC1 9 ILE A 99 TYR A 103 ILE A 107 1MZ A 155 SITE 3 AC1 9 HOH A 156 SITE 1 AC2 5 LEU A 89 SER A 92 HIS A 97 TYR A 146 SITE 2 AC2 5 HEM A 154 CRYST1 40.161 49.033 79.240 90.00 90.00 90.00 P 21 21 21 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 0.024900 0.000000 0.000000 0.00000 SCALE2 0.000000 0.020394 0.000000 0.00000 SCALE3 0.000000 0.000000 0.012620 0.00000