HEADER OXYGEN STORAGE 22-FEB-89 1MBA TITLE APLYSIA LIMACINA MYOGLOBIN. CRYSTALLOGRAPHIC ANALYSIS AT TITLE 2 1.6 ANGSTROMS RESOLUTION COMPND MOL_ID: 1; COMPND 2 MOLECULE: MYOGLOBIN; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: APLYSIA LIMACINA; SOURCE 3 ORGANISM_COMMON: SLUG SEA HARE; SOURCE 4 ORGANISM_TAXID: 6502 KEYWDS OXYGEN STORAGE EXPDTA X-RAY DIFFRACTION AUTHOR M.BOLOGNESI,S.ONESTI,G.GATTI,A.CODA,P.ASCENZI,M.BRUNORI REVDAT 4 24-FEB-09 1MBA 1 VERSN REVDAT 3 01-APR-03 1MBA 1 JRNL REVDAT 2 15-APR-92 1MBA 3 ATOM REVDAT 1 15-JAN-90 1MBA 0 JRNL AUTH M.BOLOGNESI,S.ONESTI,G.GATTI,A.CODA,P.ASCENZI, JRNL AUTH 2 M.BRUNORI JRNL TITL APLYSIA LIMACINA MYOGLOBIN. CRYSTALLOGRAPHIC JRNL TITL 2 ANALYSIS AT 1.6 A RESOLUTION. JRNL REF J.MOL.BIOL. V. 205 529 1989 JRNL REFN ISSN 0022-2836 JRNL PMID 2926816 JRNL DOI 10.1016/0022-2836(89)90224-6 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH M.BOLOGNESI,G.GATTI,M.G.GUANZIROLI,A.MATTEVI, REMARK 1 AUTH 2 S.ONESTI,A.CODA,P.ASCENZI,M.BRUNORI REMARK 1 TITL APLYSIA LIMACINA MYOGLOBIN. MOLECULAR BASES FOR REMARK 1 TITL 2 LIGAND BINDING AND REVERSIBLE UNFOLDING REMARK 1 REF TO BE PUBLISHED REMARK 1 REFN REMARK 1 REFERENCE 2 REMARK 1 AUTH M.BOLOGNESI,A.CODA,G.GATTI,P.ASCENZI,M.BRUNORI REMARK 1 TITL CRYSTAL STRUCTURE OF FERRIC APLYSIA LIMACINA REMARK 1 TITL 2 MYOGLOBIN AT 2.0 ANGSTROMS RESOLUTION REMARK 1 REF J.MOL.BIOL. V. 183 113 1985 REMARK 1 REFN ISSN 0022-2836 REMARK 1 REFERENCE 3 REMARK 1 AUTH M.BOLOGNESI,E.CANNILLO,P.ASCENZI,G.M.GIACOMETTI, REMARK 1 AUTH 2 A.MERLI,M.BRUNORI REMARK 1 TITL REACTIVITY OF FERRIC APLYSIA AND SPERM WHALE REMARK 1 TITL 2 MYOGLOBINS TOWARDS IMIDAZOLE. X-RAY AND BINDING REMARK 1 TITL 3 STUDY REMARK 1 REF J.MOL.BIOL. V. 158 305 1982 REMARK 1 REFN ISSN 0022-2836 REMARK 1 REFERENCE 4 REMARK 1 AUTH M.BOLOGNESI,E.CANNILLO,R.OBERTI,G.ROSSI,L.UNGARETTI REMARK 1 TITL THE STRUCTURE OF APLYSIA LIMACINA MYOGLOBIN AT 3.6 REMARK 1 TITL 2 ANGSTROMS RESOLUTION REMARK 1 REF ACTA CRYSTALLOGR.,SECT.A V. 34 62 1978 REMARK 1 REF 2 (SUPPLEMENT) REMARK 1 REFN ISSN 0567-7394 REMARK 1 REFERENCE 5 REMARK 1 AUTH L.UNGARETTI,M.BOLOGNESI,E.CANNILLO,R.OBERTI,G.ROSSI REMARK 1 TITL THE CRYSTAL STRUCTURE OF MET-MYOGLOBIN FROM REMARK 1 TITL 2 APLYSIA LIMACINA AT 5 ANGSTROMS RESOLUTION REMARK 1 REF ACTA CRYSTALLOGR.,SECT.B V. 34 3658 1978 REMARK 1 REFN ISSN 0108-7681 REMARK 1 REFERENCE 6 REMARK 1 AUTH T.L.BLUNDELL,M.BRUNORI,B.CURTI,M.BOLOGNESI,A.CODA, REMARK 1 AUTH 2 M.FUMAGALLI,L.UNGARETTI REMARK 1 TITL CRYSTALLIZATION AND PRELIMINARY X-RAY DIFFRACTION REMARK 1 TITL 2 STUDIES ON MET-MYOGLOBIN FROM APLYSIA LIMACINA REMARK 1 REF J.MOL.BIOL. V. 97 665 1975 REMARK 1 REFN ISSN 0022-2836 REMARK 1 REFERENCE 7 REMARK 1 AUTH L.TENTORI,G.VIVALDI,S.CARTA,M.MARINUCCI,A.MASSA, REMARK 1 AUTH 2 E.ANTONINI,M.BRUNORI REMARK 1 TITL THE AMINO ACID SEQUENCE OF MYOGLOBIN FROM THE REMARK 1 TITL 2 MOLLUSC APLYSIA LIMACINA REMARK 1 REF INT.J.PEPT.PROTEIN RES. V. 5 187 1973 REMARK 1 REFN ISSN 0367-8377 REMARK 2 REMARK 2 RESOLUTION. 1.60 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : EREF REMARK 3 AUTHORS : JACK,LEVITT REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.60 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : NULL REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL 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) : 0.193 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 : 1086 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 43 REMARK 3 SOLVENT ATOMS : 108 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) : 0.017 REMARK 3 BOND ANGLES (DEGREES) : 2.12 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 : 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: NULL REMARK 4 REMARK 4 1MBA 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 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 (%): 37.94 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.98 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 26.49000 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 16.25000 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 35.35000 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 16.25000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 26.49000 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 35.35000 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 400 REMARK 400 COMPOUND REMARK 400 REMARK 400 AT PH 7.0 THE DISTAL SITE (THE SIXTH COORDINATION POSITION REMARK 400 OF THE HEME IRON) IS NOT OCCUPIED BY A LIGAND. 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 6 CD GLU A 6 OE1 -0.098 REMARK 500 GLU A 34 CD GLU A 34 OE1 -0.069 REMARK 500 GLU A 73 CD GLU A 73 OE1 -0.073 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 ASN A 20 68.48 -118.91 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 A 181 DISTANCE = 9.66 ANGSTROMS REMARK 525 HOH A 184 DISTANCE = 5.57 ANGSTROMS REMARK 525 HOH A 193 DISTANCE = 5.34 ANGSTROMS REMARK 525 HOH A 205 DISTANCE = 6.44 ANGSTROMS REMARK 525 HOH A 208 DISTANCE = 6.81 ANGSTROMS REMARK 525 HOH A 209 DISTANCE = 5.81 ANGSTROMS REMARK 525 HOH A 220 DISTANCE = 10.11 ANGSTROMS REMARK 525 HOH A 223 DISTANCE = 6.68 ANGSTROMS REMARK 525 HOH A 225 DISTANCE = 5.59 ANGSTROMS REMARK 525 HOH A 228 DISTANCE = 6.58 ANGSTROMS REMARK 525 HOH A 230 DISTANCE = 5.81 ANGSTROMS REMARK 525 HOH A 231 DISTANCE = 9.12 ANGSTROMS REMARK 525 HOH A 237 DISTANCE = 8.24 ANGSTROMS REMARK 525 HOH A 240 DISTANCE = 5.63 ANGSTROMS REMARK 525 HOH A 250 DISTANCE = 5.64 ANGSTROMS REMARK 525 HOH A 269 DISTANCE = 7.34 ANGSTROMS REMARK 525 HOH A 276 DISTANCE = 8.01 ANGSTROMS 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 DBREF 1MBA A 1 145 UNP P02210 GLB_APLLI 1 145 SEQADV 1MBA ASN A 22 UNP P02210 ASP 22 CONFLICT SEQADV 1MBA LEU A 26 UNP P02210 ASP 26 CONFLICT SEQADV 1MBA ASP A 27 UNP P02210 ALA 27 CONFLICT SEQADV 1MBA ASN A 80 UNP P02210 ASP 80 CONFLICT SEQRES 1 A 147 ACE SER LEU SER ALA ALA GLU ALA ASP LEU ALA GLY LYS SEQRES 2 A 147 SER TRP ALA PRO VAL PHE ALA ASN LYS ASN ALA ASN GLY SEQRES 3 A 147 LEU ASP PHE LEU VAL ALA LEU PHE GLU LYS PHE PRO ASP SEQRES 4 A 147 SER ALA ASN PHE PHE ALA ASP PHE LYS GLY LYS SER VAL SEQRES 5 A 147 ALA ASP ILE LYS ALA SER PRO LYS LEU ARG ASP VAL SER SEQRES 6 A 147 SER ARG ILE PHE THR ARG LEU ASN GLU PHE VAL ASN ASN SEQRES 7 A 147 ALA ALA ASN ALA GLY LYS MET SER ALA MET LEU SER GLN SEQRES 8 A 147 PHE ALA LYS GLU HIS VAL GLY PHE GLY VAL GLY SER ALA SEQRES 9 A 147 GLN PHE GLU ASN VAL ARG SER MET PHE PRO GLY PHE VAL SEQRES 10 A 147 ALA SER VAL ALA ALA PRO PRO ALA GLY ALA ASP ALA ALA SEQRES 11 A 147 TRP THR LYS LEU PHE GLY LEU ILE ILE ASP ALA LEU LYS SEQRES 12 A 147 ALA ALA GLY ALA HET ACE A 0 3 HET HEM A 148 43 HETNAM ACE ACETYL GROUP HETNAM HEM PROTOPORPHYRIN IX CONTAINING FE HETSYN HEM HEME FORMUL 1 ACE C2 H4 O FORMUL 2 HEM C34 H32 FE N4 O4 FORMUL 3 HOH *108(H2 O) HELIX 1 A ALA A 4 ALA A 19 1BENT ALPHA-HELIX, RESIDUE 16 16 HELIX 2 B LYS A 21 LYS A 35 1 15 HELIX 3 C PRO A 37 PHE A 42 5 6 HELIX 4 D VAL A 51 LYS A 55 1 5 HELIX 5 E LYS A 59 ASN A 76 1 18 HELIX 6 F ALA A 81 GLY A 97 1 17 HELIX 7 G SER A 102 SER A 118 1BENT ALPHA-HELIX, RESIDUE 113 17 HELIX 8 H ALA A 126 ALA A 143 1 18 LINK C ACE A 0 N SER A 1 1555 1555 1.25 LINK FE HEM A 148 NE2 HIS A 95 1555 1555 2.11 SITE 1 AC1 13 PHE A 28 SER A 39 PHE A 42 PHE A 43 SITE 2 AC1 13 ARG A 66 ILE A 67 ARG A 70 PHE A 91 SITE 3 AC1 13 HIS A 95 PHE A 98 PHE A 105 VAL A 108 SITE 4 AC1 13 HOH A 266 CRYST1 52.980 70.700 32.500 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 0.018875 0.000000 0.000000 0.00000 SCALE2 0.000000 0.014144 0.000000 0.00000 SCALE3 0.000000 0.000000 0.030769 0.00000 HETATM 1 C ACE A 0 -71.037 -51.010 -24.583 1.00 37.53 C HETATM 2 O ACE A 0 -70.627 -49.817 -24.393 1.00 38.81 O HETATM 3 CH3 ACE A 0 -71.984 -51.397 -25.646 1.00 34.12 C