2HBC - Header Asymmetric Unit

HEADER OXYGEN TRANSPORT 31-AUG-94 2HBC

TITLE HIGH RESOLUTION X-RAY STRUCTURES OF MYOGLOBIN-AND TITLE 2 HEMOGLOBIN-ALKYL ISOCYANIDE COMPLEXES

COMPND MOL_ID: 1; COMPND 2 MOLECULE: HEMOGLOBIN A (ETHYL ISOCYANIDE) (ALPHA CHAIN); COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES; COMPND 5 MOL_ID: 2; COMPND 6 MOLECULE: HEMOGLOBIN A (ETHYL ISOCYANIDE) (BETA CHAIN); COMPND 7 CHAIN: B; COMPND 8 ENGINEERED: YES

SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606; SOURCE 5 ORGAN: SEED; SOURCE 6 MOL_ID: 2; SOURCE 7 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 8 ORGANISM_COMMON: HUMAN; SOURCE 9 ORGANISM_TAXID: 9606; SOURCE 10 ORGAN: SEED

KEYWDS OXYGEN TRANSPORT

EXPDTA X-RAY DIFFRACTION

AUTHOR K.A.JOHNSON,J.S.OLSON,G.N.PHILLIPS JR.

REVDAT 3 24-FEB-09 2HBC 1 VERSN REVDAT 2 03-MAY-05 2HBC 1 AUTHOR REMARK REVDAT 1 07-FEB-95 2HBC 0

JRNL AUTH K.A.JOHNSON JRNL TITL HIGH RESOLUTION X-RAY STRUCTURES OF MYOGLOBIN-AND JRNL TITL 2 HEMOGLOBIN-ALKYL ISOCYANIDE COMPLEXES JRNL REF THESIS V. 1 1993 JRNL REFN

REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH K.A.JOHNSON,J.S.OLSON,G.N.PHILLIPS JR. REMARK 1 TITL STRUCTURE OF MYOGLOBIN-ETHYL ISOCYANIDE: HISTIDINE REMARK 1 TITL 2 AS A SWINGING DOOR FOR LIGAND ENTRY REMARK 1 REF J.MOL.BIOL. V. 207 459 1989 REMARK 1 REFN ISSN 0022-2836

REMARK 2 REMARK 2 RESOLUTION. 2.10 ANGSTROMS.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.10 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 5.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : NULL REMARK 3 DATA CUTOFF LOW (ABS(F)) : NULL REMARK 3 COMPLETENESS (WORKING+TEST) (%) : NULL REMARK 3 NUMBER OF REFLECTIONS : NULL 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) : 0.177 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 : 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 : 2192 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 94 REMARK 3 SOLVENT ATOMS : 66 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL 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) : 0.020 REMARK 3 BOND ANGLES (DEGREES) : 1.76 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) : 1.500 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 2.000 ; 2.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 2.000 ; 2.000 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 2.500 ; 2.500 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: REFINEMENT. THE STARTING MODEL WAS REMARK 3 SHAANAN'S OXYHEMOGLOBIN (1HHO) WITH THE OXYGEN LIGAND REMOVED REMARK 3 AND THE ETHYL ISOCYANIDE LIGAND MODELED INTO INITIAL REMARK 3 DIFFERENCE MAP (FO-FC) ELECTRON DENSITY. THE PROGRAM X-PLOR REMARK 3 WAS USED TO ACHIEVE A FINAL CONVENTIONAL R-FACTOR OF 17.7%. REMARK 3 THE REFINEMENT PROCESS INCLUDED SIMULATED ANNEALING FOLLOWED REMARK 3 BY POSITION AND TEMPERATURE FACTOR REFINEMENT. AN ITERATIVE REMARK 3 PROCESS OF MANUAL REFITTING OF SIDE CHAINS AND PLACEMENT OF REMARK 3 WATERS WAS PERFORMED UNTIL THE R-FACTOR CONVERGED. THE REMARK 3 WEIGHTING OF PSEUDO-ENERGY X-RAY TERM WAS ADJUSTED TO GIVE A REMARK 3 BOND RMS OF 0.020 ANGSTROMS IN THE LAST FEW STEPS OF REMARK 3 POSITIONAL REFINEMENT. WATERS (N=109) WERE RETAINED FROM THE REMARK 3 STARTING STRUCTURE OF OXYHEMOGLOBIN (1HHO). ADDITIONAL WATERS REMARK 3 WERE ADDED IF THEY LAY IN 3.5 - 4.O SIGMA PEAKS IN FO-FC REMARK 3 ELECTRON DENSITY MAPS AND 1 SIGMA PEAKS IN 2FO-FC MAPS. REMARK 3 CONCURRENTLY, A WATER WOULD BE DELETED IF ITS OCCUPANCY (Q) REMARK 3 AND TEMPERATURE FACTOR (B) COMBINED TO MAKE THE VALUE (Q*EXP(- REMARK 3 B/36)*100%) FALL BELOW 10%. A PEAK NUMBER OF 109 WATERS WAS REMARK 3 REACHED. THIS WAS REDUCED TO 66 WATERS OVER THE LAST FEW REMARK 3 REFINEMENT CYCLES BY DELETING WATERS WHICH FELL BELOW A 20% REMARK 3 THRESHOLD.

REMARK 4 REMARK 4 2HBC COMPLIES WITH FORMAT V. 3.15, 01-DEC-08

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY BNL.

REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : NULL REMARK 200 TEMPERATURE (KELVIN) : NULL REMARK 200 PH : NULL REMARK 200 NUMBER OF CRYSTALS USED : NULL REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : NULL REMARK 200 RADIATION SOURCE : NULL REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : NULL REMARK 200 WAVELENGTH OR RANGE (A) : NULL REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : NULL REMARK 200 DETECTOR MANUFACTURER : NULL REMARK 200 INTENSITY-INTEGRATION SOFTWARE : NULL REMARK 200 DATA SCALING SOFTWARE : NULL REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : NULL REMARK 200 RESOLUTION RANGE HIGH (A) : NULL REMARK 200 RESOLUTION RANGE LOW (A) : NULL REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : NULL REMARK 200 DATA REDUNDANCY : NULL REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : NULL 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) : NULL REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : NULL REMARK 200 COMPLETENESS FOR SHELL (%) : NULL 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: NULL REMARK 200 SOFTWARE USED: X-PLOR REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL

REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 46.03 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.28 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: NULL

REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 41 21 2 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,-Y,Z+1/2 REMARK 290 3555 -Y+1/2,X+1/2,Z+1/4 REMARK 290 4555 Y+1/2,-X+1/2,Z+3/4 REMARK 290 5555 -X+1/2,Y+1/2,-Z+1/4 REMARK 290 6555 X+1/2,-Y+1/2,-Z+3/4 REMARK 290 7555 Y,X,-Z REMARK 290 8555 -Y,-X,-Z+1/2 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 96.90000 REMARK 290 SMTRY1 3 0.000000 -1.000000 0.000000 27.02500 REMARK 290 SMTRY2 3 1.000000 0.000000 0.000000 27.02500 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 48.45000 REMARK 290 SMTRY1 4 0.000000 1.000000 0.000000 27.02500 REMARK 290 SMTRY2 4 -1.000000 0.000000 0.000000 27.02500 REMARK 290 SMTRY3 4 0.000000 0.000000 1.000000 145.35000 REMARK 290 SMTRY1 5 -1.000000 0.000000 0.000000 27.02500 REMARK 290 SMTRY2 5 0.000000 1.000000 0.000000 27.02500 REMARK 290 SMTRY3 5 0.000000 0.000000 -1.000000 48.45000 REMARK 290 SMTRY1 6 1.000000 0.000000 0.000000 27.02500 REMARK 290 SMTRY2 6 0.000000 -1.000000 0.000000 27.02500 REMARK 290 SMTRY3 6 0.000000 0.000000 -1.000000 145.35000 REMARK 290 SMTRY1 7 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY2 7 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 7 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 8 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY2 8 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 8 0.000000 0.000000 -1.000000 96.90000 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: 4570 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 13280 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -47.0 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 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 LEU A 2 98.28 74.71 REMARK 500 THR A 41 -32.66 -26.75 REMARK 500 ARG A 92 70.54 38.24 REMARK 500 LEU B 3 115.12 70.43 REMARK 500 ASN B 80 68.74 -153.61 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: PLANAR GROUPS REMARK 500 REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS REMARK 500 AN RMSD GREATER THAN THIS VALUE REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 M RES CSSEQI RMS TYPE REMARK 500 TYR B 145 0.07 SIDE_CHAIN REMARK 500 REMARK 500 REMARK: NULL

REMARK 525 REMARK 525 SOLVENT REMARK 525 REMARK 525 THE SOLVENT MOLECULES HAVE CHAIN IDENTIFIERS THAT REMARK 525 INDICATE THE POLYMER CHAIN WITH WHICH THEY ARE MOST REMARK 525 CLOSELY ASSOCIATED. THE REMARK LISTS ALL THE SOLVENT REMARK 525 MOLECULES WHICH ARE MORE THAN 5A AWAY FROM THE REMARK 525 NEAREST POLYMER CHAIN (M = MODEL NUMBER; REMARK 525 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE REMARK 525 NUMBER; I=INSERTION CODE): REMARK 525 REMARK 525 M RES CSSEQI REMARK 525 HOH B 221 DISTANCE = 5.94 ANGSTROMS REMARK 525 HOH B 222 DISTANCE = 6.10 ANGSTROMS REMARK 525 HOH A 210 DISTANCE = 6.01 ANGSTROMS REMARK 525 HOH B 563 DISTANCE = 5.15 ANGSTROMS REMARK 525 HOH B 660 DISTANCE = 7.69 ANGSTROMS

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 142 FE REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ENC A 143 C REMARK 620 2 HIS A 87 NE2 169.1 REMARK 620 3 ENC A 143 N 6.9 175.1 REMARK 620 N 1 2 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 HEM B 147 FE REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS B 92 NE2 REMARK 620 2 ENC B 148 N 165.9 REMARK 620 3 ENC B 148 C 172.3 19.4 REMARK 620 N 1 2

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 142 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ENC A 143 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HEM B 147 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE ENC B 148

DBREF 2HBC A 1 141 UNP P69905 HBA_HUMAN 1 141 DBREF 2HBC B 1 146 UNP P68871 HBB_HUMAN 1 146

SEQRES 1 A 141 VAL LEU SER PRO ALA ASP LYS THR ASN VAL LYS ALA ALA SEQRES 2 A 141 TRP GLY LYS VAL GLY ALA HIS ALA GLY GLU TYR GLY ALA SEQRES 3 A 141 GLU ALA LEU GLU ARG MET PHE LEU SER PHE PRO THR THR SEQRES 4 A 141 LYS THR TYR PHE PRO HIS PHE ASP LEU SER HIS GLY SER SEQRES 5 A 141 ALA GLN VAL LYS GLY HIS GLY LYS LYS VAL ALA ASP ALA SEQRES 6 A 141 LEU THR ASN ALA VAL ALA HIS VAL ASP ASP MET PRO ASN SEQRES 7 A 141 ALA LEU SER ALA LEU SER ASP LEU HIS ALA HIS LYS LEU SEQRES 8 A 141 ARG VAL ASP PRO VAL ASN PHE LYS LEU LEU SER HIS CYS SEQRES 9 A 141 LEU LEU VAL THR LEU ALA ALA HIS LEU PRO ALA GLU PHE SEQRES 10 A 141 THR PRO ALA VAL HIS ALA SER LEU ASP LYS PHE LEU ALA SEQRES 11 A 141 SER VAL SER THR VAL LEU THR SER LYS TYR ARG SEQRES 1 B 146 VAL HIS LEU THR PRO GLU GLU LYS SER ALA VAL THR ALA SEQRES 2 B 146 LEU TRP GLY LYS VAL ASN VAL ASP GLU VAL GLY GLY GLU SEQRES 3 B 146 ALA LEU GLY ARG LEU LEU VAL VAL TYR PRO TRP THR GLN SEQRES 4 B 146 ARG PHE PHE GLU SER PHE GLY ASP LEU SER THR PRO ASP SEQRES 5 B 146 ALA VAL MET GLY ASN PRO LYS VAL LYS ALA HIS GLY LYS SEQRES 6 B 146 LYS VAL LEU GLY ALA PHE SER ASP GLY LEU ALA HIS LEU SEQRES 7 B 146 ASP ASN LEU LYS GLY THR PHE ALA THR LEU SER GLU LEU SEQRES 8 B 146 HIS CYS ASP LYS LEU HIS VAL ASP PRO GLU ASN PHE ARG SEQRES 9 B 146 LEU LEU GLY ASN VAL LEU VAL CYS VAL LEU ALA HIS HIS SEQRES 10 B 146 PHE GLY LYS GLU PHE THR PRO PRO VAL GLN ALA ALA TYR SEQRES 11 B 146 GLN LYS VAL VAL ALA GLY VAL ALA ASN ALA LEU ALA HIS SEQRES 12 B 146 LYS TYR HIS

HET HEM A 142 43 HET ENC A 143 4 HET HEM B 147 43 HET ENC B 148 4

HETNAM HEM PROTOPORPHYRIN IX CONTAINING FE HETNAM ENC ETHYL ISOCYANIDE

HETSYN HEM HEME

FORMUL 3 HEM 2(C34 H32 FE N4 O4) FORMUL 4 ENC 2(C3 H6 N 1+) FORMUL 7 HOH *66(H2 O)

HELIX 1 AA SER A 3 GLY A 18 1 16 HELIX 2 AB HIS A 20 SER A 35 1 16 HELIX 3 AC PHE A 36 TYR A 42 1 7 HELIX 4 AD HIS A 50 GLY A 51 1DEGEN 2 RES HLX RETAIN HOMOL 2 HELIX 5 AE SER A 52 ALA A 71 1 20 HELIX 6 AF LEU A 80 ALA A 88 1 9 HELIX 7 AG ASP A 94 HIS A 112 1 19 HELIX 8 AH THR A 118 SER A 138 1 21 HELIX 9 BA THR B 4 VAL B 18 1 15 HELIX 10 BB ASN B 19 VAL B 34 1 16 HELIX 11 BC TYR B 35 PHE B 41 1 7 HELIX 12 BD THR B 50 GLY B 56 1 7 HELIX 13 BE ASN B 57 ALA B 76 1 20 HELIX 14 BF PHE B 85 CYS B 93 1 9 HELIX 15 BG ASP B 99 HIS B 117 1 19 HELIX 16 BH THR B 123 HIS B 143 1 21

LINK FE HEM A 142 C ENC A 143 1555 1555 1.69 LINK FE HEM A 142 NE2 HIS A 87 1555 1555 2.06 LINK FE HEM A 142 N ENC A 143 1555 1555 2.69 LINK NE2 HIS B 92 FE HEM B 147 1555 1555 1.97 LINK FE HEM B 147 N ENC B 148 1555 1555 2.50 LINK FE HEM B 147 C ENC B 148 1555 1555 1.76

SITE 1 AC1 13 TYR A 42 PHE A 43 HIS A 45 HIS A 58 SITE 2 AC1 13 LYS A 61 LEU A 86 HIS A 87 LEU A 91 SITE 3 AC1 13 ASN A 97 PHE A 98 LEU A 101 LEU A 136 SITE 4 AC1 13 ENC A 143 SITE 1 AC2 5 LEU A 29 PHE A 43 HIS A 58 VAL A 62 SITE 2 AC2 5 HEM A 142 SITE 1 AC3 11 THR B 38 PHE B 41 PHE B 42 HIS B 63 SITE 2 AC3 11 HIS B 92 LEU B 96 ASN B 102 LEU B 106 SITE 3 AC3 11 LEU B 141 ENC B 148 HOH B 229 SITE 1 AC4 6 LEU B 28 PHE B 42 HIS B 63 VAL B 67 SITE 2 AC4 6 LEU B 106 HEM B 147

CRYST1 54.050 54.050 193.800 90.00 90.00 90.00 P 41 21 2 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 0.018501 0.000000 0.000000 0.00000

SCALE2 0.000000 0.018501 0.000000 0.00000

SCALE3 0.000000 0.000000 0.005160 0.00000