HEADER OXYGEN TRANSPORT 22-MAR-94 1HLB TITLE STRUCTURAL ANALYSIS OF MONOMERIC HEMICHROME AND DIMERIC CYANOMET TITLE 2 HEMOGLOBINS FROM CAUDINA ARENICOLA 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: CAUDINA ARENICOLA; SOURCE 3 ORGANISM_TAXID: 7698 KEYWDS OXYGEN TRANSPORT EXPDTA X-RAY DIFFRACTION AUTHOR M.L.HACKERT,D.T.MITCHELL REVDAT 4 29-NOV-17 1HLB 1 HELIX REVDAT 3 07-JUL-10 1HLB 1 REVDAT 2 24-FEB-09 1HLB 1 VERSN REVDAT 1 22-JUN-94 1HLB 0 JRNL AUTH D.T.MITCHELL,G.B.KITTO,M.L.HACKERT JRNL TITL STRUCTURAL ANALYSIS OF MONOMERIC HEMICHROME AND DIMERIC JRNL TITL 2 CYANOMET HEMOGLOBINS FROM CAUDINA ARENICOLA. JRNL REF J.MOL.BIOL. V. 251 421 1995 JRNL REFN ISSN 0022-2836 JRNL PMID 7650740 JRNL DOI 10.1006/JMBI.1995.0445 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH G.D.MCDONALD,L.DAVIDSON,G.B.KITTO REMARK 1 TITL AMINO ACID SEQUENCE OF THE COELOMIC C GLOBIN FROM THE SEA REMARK 1 TITL 2 CUCUMBER CAUDINA (MOLPADIA) ARENICOLA REMARK 1 REF J.PROTEIN CHEM. V. 11 29 1992 REMARK 1 REFN ISSN 0277-8033 REMARK 1 REFERENCE 2 REMARK 1 AUTH W.M.CARSON,T.R.BOWERS,G.B.KITTO,M.L.HACKERT REMARK 1 TITL PRELIMINARY CRYSTALLOGRAPHIC DATA ON MONOMERIC AND DIMERIC REMARK 1 TITL 2 HEMOGLOBINS FROM THE SEA CUCUMBER, MOLPADIA ARENICOLA REMARK 1 REF J.BIOL.CHEM. V. 254 7400 1979 REMARK 1 REFN ISSN 0021-9258 REMARK 1 REFERENCE 3 REMARK 1 AUTH C.BONAVENTURA,J.BONAVENTURA,B.KITTO,M.BRUNORI,E.ANTONINI REMARK 1 TITL FUNCTIONAL CONSEQUENCES OF LIGAND-LINKED DISSOCIATION IN REMARK 1 TITL 2 HEMOGLOBIN FROM THE SEA CUCUMBER MOLPADIA ARENICOLA REMARK 1 REF BIOCHIM.BIOPHYS.ACTA V. 428 779 1976 REMARK 1 REFN ISSN 0006-3002 REMARK 1 REFERENCE 4 REMARK 1 AUTH G.B.KITTO,D.ERWIN,R.WEST,J.OMNAAS REMARK 1 TITL N-TERMINAL SUBSTITUTION OF SOME SEA CUCUMBER HEMOGLOBINS REMARK 1 REF COMP.BIOCHEM.PHYSIOL. B: V. 55 105 1976 REMARK 1 REF 2 BIOCHEM.MOL.BIOL. REMARK 1 REFN ISSN 0305-0491 REMARK 2 REMARK 2 RESOLUTION. 2.50 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) : 2.50 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 5.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 3.000 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 : 4916 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) : 0.150 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 : 1236 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 43 REMARK 3 SOLVENT ATOMS : 111 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) : 0.014 REMARK 3 BOND ANGLES (DEGREES) : 3.590 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 1HLB 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_1000173892. 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: X-PLOR REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 47.24 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.33 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: NULL REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 1 21 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,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 0.00000 REMARK 290 SMTRY2 2 0.000000 1.000000 0.000000 22.61500 REMARK 290 SMTRY3 2 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: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT REMARK 500 REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT. REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI DISTANCE REMARK 500 H LEU A 12 HZ3 LYS A 17 1.31 REMARK 500 REMARK 500 REMARK: NULL 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 25 NE2 HIS A 25 CD2 -0.072 REMARK 500 HIS A 73 NE2 HIS A 73 CD2 -0.067 REMARK 500 HIS A 104 NE2 HIS A 104 CD2 -0.077 REMARK 500 HIS A 113 NE2 HIS A 113 CD2 -0.074 REMARK 500 HIS A 156 NE2 HIS A 156 CD2 -0.070 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 24 CD1 - CG - CD2 ANGL. DEV. = 7.2 DEGREES REMARK 500 TRP A 24 CE2 - CD2 - CG ANGL. DEV. = -6.4 DEGREES REMARK 500 MET A 56 CA - CB - CG ANGL. DEV. = 10.9 DEGREES REMARK 500 ARG A 76 NE - CZ - NH1 ANGL. DEV. = 5.8 DEGREES REMARK 500 ARG A 76 NE - CZ - NH2 ANGL. DEV. = -5.0 DEGREES REMARK 500 TYR A 84 CB - CG - CD2 ANGL. DEV. = -6.0 DEGREES REMARK 500 LEU A 100 CA - CB - CG ANGL. DEV. = 16.3 DEGREES REMARK 500 TRP A 141 CD1 - CG - CD2 ANGL. DEV. = 6.8 DEGREES REMARK 500 TRP A 141 CE2 - CD2 - CG ANGL. DEV. = -6.4 DEGREES REMARK 500 LEU A 153 N - CA - C ANGL. DEV. = 22.6 DEGREES REMARK 500 LEU A 153 CA - C - N ANGL. DEV. = -18.9 DEGREES REMARK 500 VAL A 154 CA - CB - CG1 ANGL. DEV. = 11.4 DEGREES REMARK 500 VAL A 154 CA - CB - CG2 ANGL. DEV. = -15.0 DEGREES REMARK 500 VAL A 154 N - CA - C ANGL. DEV. = 22.5 DEGREES REMARK 500 VAL A 154 CA - C - O ANGL. DEV. = 12.9 DEGREES REMARK 500 VAL A 154 CA - C - N ANGL. DEV. = -27.9 DEGREES REMARK 500 VAL A 154 O - C - N ANGL. DEV. = 10.9 DEGREES REMARK 500 LYS A 155 N - CA - C ANGL. DEV. = -16.7 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 LEU A 4 -2.20 70.63 REMARK 500 ALA A 5 -90.54 43.94 REMARK 500 GLN A 7 -78.27 -163.39 REMARK 500 ALA A 8 -33.82 60.09 REMARK 500 GLN A 9 -137.50 38.69 REMARK 500 ASP A 11 -73.22 -62.17 REMARK 500 ALA A 61 -48.23 -22.12 REMARK 500 GLU A 135 -24.36 8.85 REMARK 500 LEU A 153 121.37 51.17 REMARK 500 VAL A 154 116.26 53.05 REMARK 500 LYS A 155 67.57 -156.43 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 158 FE REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS A 73 NE2 REMARK 620 2 HEM A 158 NA 91.4 REMARK 620 3 HEM A 158 NB 92.3 91.4 REMARK 620 4 HEM A 158 NC 89.4 179.2 88.3 REMARK 620 5 HEM A 158 ND 83.2 87.9 175.4 92.4 REMARK 620 6 HIS A 104 NE2 176.7 88.9 90.9 90.4 93.6 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 158 DBREF 1HLB A 1 157 UNP P80018 GLBC_CAUAR 1 157 SEQRES 1 A 158 ACE GLY GLY THR LEU ALA ILE GLN ALA GLN GLY ASP LEU SEQRES 2 A 158 THR LEU ALA GLN LYS LYS ILE VAL ARG LYS THR TRP HIS SEQRES 3 A 158 GLN LEU MET ARG ASN LYS THR SER PHE VAL THR ASP VAL SEQRES 4 A 158 PHE ILE ARG ILE PHE ALA TYR ASP PRO SER ALA GLN ASN SEQRES 5 A 158 LYS PHE PRO GLN MET ALA GLY MET SER ALA SER GLN LEU SEQRES 6 A 158 ARG SER SER ARG GLN MET GLN ALA HIS ALA ILE ARG VAL SEQRES 7 A 158 SER SER ILE MET SER GLU TYR VAL GLU GLU LEU ASP SER SEQRES 8 A 158 ASP ILE LEU PRO GLU LEU LEU ALA THR LEU ALA ARG THR SEQRES 9 A 158 HIS ASP LEU ASN LYS VAL GLY ALA ASP HIS TYR ASN LEU SEQRES 10 A 158 PHE ALA LYS VAL LEU MET GLU ALA LEU GLN ALA GLU LEU SEQRES 11 A 158 GLY SER ASP PHE ASN GLU LYS THR ARG ASP ALA TRP ALA SEQRES 12 A 158 LYS ALA PHE SER VAL VAL GLN ALA VAL LEU LEU VAL LYS SEQRES 13 A 158 HIS GLY HET ACE A 0 3 HET HEM A 158 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 *111(H2 O) HELIX 1 A THR A 13 MET A 28 1 16 HELIX 2 B SER A 33 TYR A 45 1 13 HELIX 3 C ASP A 46 LYS A 52 1 7 HELIX 4 D SER A 60 SER A 66 1 7 HELIX 5 E SER A 67 GLU A 86 1DISTAL HIS 73 20 HELIX 6 F ASP A 91 LEU A 106 1KINK AT PRO 93, PROX. HIS 104 16 HELIX 7 G GLY A 110 GLU A 128 1 19 HELIX 8 H ASN A 134 ALA A 150 1 17 LINK C ACE A 0 N GLY A 1 1555 1555 1.34 LINK FE HEM A 158 NE2 HIS A 73 1555 1555 2.07 LINK FE HEM A 158 NE2 HIS A 104 1555 1555 2.07 SITE 1 AC1 16 PHE A 39 ALA A 49 LYS A 52 PHE A 53 SITE 2 AC1 16 HIS A 73 ARG A 76 THR A 99 THR A 103 SITE 3 AC1 16 HIS A 104 ASN A 107 VAL A 109 HIS A 113 SITE 4 AC1 16 PHE A 117 HOH A 183 HOH A 211 HOH A 261 CRYST1 45.740 45.230 40.920 90.00 104.40 90.00 P 1 21 1 2 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 0.021863 0.000000 0.005613 0.00000 SCALE2 0.000000 0.022109 0.000000 0.00000 SCALE3 0.000000 0.000000 0.025231 0.00000 HETATM 1 C ACE A 0 2.541 18.490 -8.799 1.00 79.45 C HETATM 2 O ACE A 0 3.484 17.770 -8.457 1.00 83.62 O HETATM 3 CH3 ACE A 0 2.540 18.913 -10.266 1.00 83.23 C