HEADER OXYGEN TRANSPORT 11-FEB-91 2HBG TITLE GLYCERA DIBRANCHIATA HEMOGLOBIN. STRUCTURE AND REFINEMENT AT 1.5 TITLE 2 ANGSTROMS RESOLUTION COMPND MOL_ID: 1; COMPND 2 MOLECULE: HEMOGLOBIN (DEOXY); COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: GLYCERA DIBRANCHIATA; SOURCE 3 ORGANISM_TAXID: 6350 KEYWDS OXYGEN TRANSPORT EXPDTA X-RAY DIFFRACTION AUTHOR G.A.ARENTS,W.E.LOVE REVDAT 5 14-FEB-24 2HBG 1 REMARK SEQADV LINK REVDAT 4 29-NOV-17 2HBG 1 HELIX REVDAT 3 24-FEB-09 2HBG 1 VERSN REVDAT 2 01-APR-03 2HBG 1 JRNL REVDAT 1 15-JUL-92 2HBG 0 JRNL AUTH G.ARENTS,W.E.LOVE JRNL TITL GLYCERA DIBRANCHIATA HEMOGLOBIN. STRUCTURE AND REFINEMENT AT JRNL TITL 2 1.5 A RESOLUTION. JRNL REF J.MOL.BIOL. V. 210 149 1989 JRNL REFN ISSN 0022-2836 JRNL PMID 2585515 JRNL DOI 10.1016/0022-2836(89)90297-0 REMARK 2 REMARK 2 RESOLUTION. 1.50 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : PROLSQ REMARK 3 AUTHORS : KONNERT,HENDRICKSON REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.50 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : NULL REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 COMPLETENESS FOR RANGE (%) : 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 + TEST SET) : 0.127 REMARK 3 R VALUE (WORKING SET) : NULL 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) : NULL 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) : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 1048 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 43 REMARK 3 SOLVENT ATOMS : 146 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 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 DISTANCE RESTRAINTS. RMS SIGMA REMARK 3 BOND LENGTH (A) : 0.015 ; NULL REMARK 3 ANGLE DISTANCE (A) : 0.040 ; NULL REMARK 3 INTRAPLANAR 1-4 DISTANCE (A) : NULL ; NULL REMARK 3 H-BOND OR METAL COORDINATION (A) : NULL ; NULL REMARK 3 REMARK 3 PLANE RESTRAINT (A) : NULL ; NULL REMARK 3 CHIRAL-CENTER RESTRAINT (A**3) : NULL ; NULL REMARK 3 REMARK 3 NON-BONDED CONTACT RESTRAINTS. REMARK 3 SINGLE TORSION (A) : NULL ; NULL REMARK 3 MULTIPLE TORSION (A) : NULL ; NULL REMARK 3 H-BOND (X...Y) (A) : NULL ; NULL 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) : NULL ; NULL REMARK 3 STAGGERED (DEGREES) : NULL ; NULL REMARK 3 TRANSVERSE (DEGREES) : NULL ; 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 OTHER REFINEMENT REMARKS: REMARK 3 LEUCINE 31 SHOWS THREE POSSIBLE GAUCHE CONFORMATIONS OF REMARK 3 ATOMS CD1 AND CD2. THESE ARE PRESENTED AS THREE ALTERNATE REMARK 3 CONFORMATIONS. NOTE THAT ONLY THREE SETS OF COORDINATES REMARK 3 WERE USED TO MODEL THIS DISORDER AND, THEREFORE, THE SIX REMARK 3 ATOMS APPEAR AS THREE ATOMS IN A GRAPHICAL VIEW OF THE REMARK 3 ENTRY. REMARK 4 REMARK 4 2HBG 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_1000178171. 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 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 FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: NULL REMARK 200 SOFTWARE USED: NULL REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 46.52 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.30 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: NULL 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 21.37500 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 19.33000 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 41.57500 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 19.33000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 21.37500 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 41.57500 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: 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 LEU A 31 CG LEU A 31 CD1 0.276 REMARK 500 LEU A 31 CG LEU A 31 CD2 0.276 REMARK 500 LYS A 84 CE LYS A 84 NZ 0.377 REMARK 500 ASN A 95 CG ASN A 95 OD1 0.891 REMARK 500 ASN A 95 CG ASN A 95 ND2 1.923 REMARK 500 SER A 109 CB SER A 109 OG -0.118 REMARK 500 SER A 112 CB SER A 112 OG 0.102 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 7 NE - CZ - NH1 ANGL. DEV. = -3.1 DEGREES REMARK 500 LEU A 31 CD1 - CG - CD2 ANGL. DEV. = -18.1 DEGREES REMARK 500 LEU A 31 CB - CG - CD1 ANGL. DEV. = 22.1 DEGREES REMARK 500 LEU A 31 CB - CG - CD2 ANGL. DEV. = 22.1 DEGREES REMARK 500 ASP A 52 CB - CG - OD1 ANGL. DEV. = 11.1 DEGREES REMARK 500 ASP A 75 CB - CG - OD1 ANGL. DEV. = 9.5 DEGREES REMARK 500 ASP A 75 CB - CG - OD2 ANGL. DEV. = -6.0 DEGREES REMARK 500 LYS A 84 CG - CD - CE ANGL. DEV. = -35.0 DEGREES REMARK 500 ASN A 95 OD1 - CG - ND2 ANGL. DEV. = 17.9 DEGREES REMARK 500 ASN A 95 CB - CG - OD1 ANGL. DEV. = -33.0 DEGREES REMARK 500 ASN A 95 CB - CG - ND2 ANGL. DEV. = -30.0 DEGREES REMARK 500 SER A 109 CA - CB - OG ANGL. DEV. = 17.4 DEGREES REMARK 500 ASP A 136 CB - CG - OD1 ANGL. DEV. = 5.8 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 21 24.18 -141.38 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 ASN A 95 0.34 SIDE CHAIN 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 148 FE REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS A 90 NE2 REMARK 620 2 HEM A 148 NA 94.0 REMARK 620 3 HEM A 148 NB 101.5 89.3 REMARK 620 4 HEM A 148 NC 100.0 166.0 87.4 REMARK 620 5 HEM A 148 ND 97.0 89.3 161.6 89.6 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 HEM A 148 REMARK 999 REMARK 999 SEQUENCE REMARK 999 THERE ARE A NUMBER OF SEQUENCE DIFFERENCES BETWEEN THE REMARK 999 SEQUENCE PRESENTED IN THIS ENTRY AND THAT IN PROTEIN REMARK 999 IDENTIFICATION RESOURCE (PIR) ENTRY GGNW1B WHICH IS BASED REMARK 999 ON THE SEQUENCE OF T.IMAMURA,T.O.BALDWIN,A.RIGGS, REMARK 999 J.BIOL.CHEM., V. 247, P. 2785 (1972). THE SUBSTITUTION OF REMARK 999 ALA FOR ASP AT RESIDUE 20 AND PHE FOR HIS AT RESIDUE 34 REMARK 999 AGREE WITH THE PARTIAL SEQUENCE OF S.L.LI,A.F.RIGGS, REMARK 999 BIOCHIM.BIOPHYS.ACTA, V. 236, P. 208 (1971)). RESIDUE 29 REMARK 999 IS ASP IN THE SEQUENCE OF IMAMURA ET AL. AND GLU IN THE REMARK 999 SEQUENCE OF LI AND RIGGS. RESIDUE 29 HAS BEEN MODELED AS REMARK 999 LYS IN THIS ENTRY DUE TO THE ABSENCE OF SIDE CHAIN REMARK 999 BRANCHING IN THE ELECTRON DENSITY MAP. RESIDUE 54 WAS REMARK 999 CHANGED FROM ALA TO GLY AND RESIDUE 100 WAS CHANGED FROM REMARK 999 GLY TO ALA; THE CORRESPONDING NEGATIVE AND POSITIVE REMARK 999 DIFFERENCE ELECTRON DENSITY PEAKS IMMEDIATELY DISAPPEARED. REMARK 999 THE SUBSTITUTION OF ALA FOR ASP AT RESIDUE 57 AGREES WELL REMARK 999 WITH THE X-RAY DATA BUT MAY NOT REPRESENT THE TRUTH. THE REMARK 999 SIDE-CHAIN OF RESIDUE 57 IS COMPLETELY EXPOSED TO THE REMARK 999 SOLVENT; THEREFORE IT IS POSSIBLE THAT THE CG AND OD ATOMS REMARK 999 ARE PRESENT BUT EXIST IN TOO MANY CONFORMATIONS IN THE REMARK 999 CRYSTAL FOR ANY CORRESPONDING ELECTRON DENSITY TO BE REMARK 999 VISIBLE. NEVERTHELESS, ALA WAS SUBSTITUTED AT RESIDUE 57 REMARK 999 BECAUSE THERE IS NO ELECTRON DENSITY TO WHICH THE REMARK 999 ASPARTATE ATOMS COULD BE FITTED. DBREF 2HBG A 1 147 UNP P02216 GLB1_GLYDI 1 147 SEQADV 2HBG LYS A 29 UNP P02216 ASP 29 CONFLICT SEQRES 1 A 147 GLY LEU SER ALA ALA GLN ARG GLN VAL ILE ALA ALA THR SEQRES 2 A 147 TRP LYS ASP ILE ALA GLY ALA ASP ASN GLY ALA GLY VAL SEQRES 3 A 147 GLY LYS LYS CYS LEU ILE LYS PHE LEU SER ALA HIS PRO SEQRES 4 A 147 GLN MET ALA ALA VAL PHE GLY PHE SER GLY ALA SER ASP SEQRES 5 A 147 PRO GLY VAL ALA ALA LEU GLY ALA LYS VAL LEU ALA GLN SEQRES 6 A 147 ILE GLY VAL ALA VAL SER HIS LEU GLY ASP GLU GLY LYS SEQRES 7 A 147 MET VAL ALA GLN MET LYS ALA VAL GLY VAL ARG HIS LYS SEQRES 8 A 147 GLY TYR GLY ASN LYS HIS ILE LYS ALA GLN TYR PHE GLU SEQRES 9 A 147 PRO LEU GLY ALA SER LEU LEU SER ALA MET GLU HIS ARG SEQRES 10 A 147 ILE GLY GLY LYS MET ASN ALA ALA ALA LYS ASP ALA TRP SEQRES 11 A 147 ALA ALA ALA TYR ALA ASP ILE SER GLY ALA LEU ILE SER SEQRES 12 A 147 GLY LEU GLN SER HET HEM A 148 43 HETNAM HEM PROTOPORPHYRIN IX CONTAINING FE HETSYN HEM HEME FORMUL 2 HEM C34 H32 FE N4 O4 FORMUL 3 HOH *146(H2 O) HELIX 1 HA SER A 3 ALA A 18 1 16 HELIX 2 HB GLY A 23 ALA A 37 1 15 HELIX 3 HC PRO A 39 GLY A 46 1IRREGULAR 8 HELIX 4 HE PRO A 53 HIS A 72 1 20 HELIX 5 HF GLU A 76 GLY A 92 189-92 DISTORTED 17 HELIX 6 HG ALA A 100 GLY A 119 1 20 HELIX 7 HH ALA A 124 SER A 147 1 24 LINK NE2 HIS A 90 FE HEM A 148 1555 1555 2.17 SITE 1 AC1 13 PHE A 45 LEU A 58 LYS A 61 ARG A 89 SITE 2 AC1 13 HIS A 90 TYR A 93 GLY A 94 TYR A 102 SITE 3 AC1 13 PHE A 103 ILE A 137 LEU A 141 HOH A 223 SITE 4 AC1 13 HOH A 287 CRYST1 42.750 83.150 38.660 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 0.023392 0.000000 0.000000 0.00000 SCALE2 0.000000 0.012026 0.000000 0.00000 SCALE3 0.000000 0.000000 0.025867 0.00000