2FAM - Header Asymmetric Unit

HEADER OXYGEN STORAGE 20-JUL-93 2FAM

TITLE X-RAY CRYSTAL STRUCTURE OF FERRIC APLYSIA LIMACINA TITLE 2 MYOGLOBIN IN DIFFERENT LIGANDED STATES

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 E.CONTI,C.MOSER,M.RIZZI,A.MATTEVI,C.LIONETTI,A.CODA, AUTHOR 2 P.ASCENZI,M.BRUNORI,M.BOLOGNESI

REVDAT 3 24-FEB-09 2FAM 1 VERSN REVDAT 2 31-JAN-94 2FAM 1 REMARK REVDAT 1 31-OCT-93 2FAM 0

JRNL AUTH E.CONTI,C.MOSER,M.RIZZI,A.MATTEVI,C.LIONETTI, JRNL AUTH 2 A.CODA,P.ASCENZI,M.BRUNORI,M.BOLOGNESI JRNL TITL X-RAY CRYSTAL STRUCTURE OF FERRIC APLYSIA LIMACINA JRNL TITL 2 MYOGLOBIN IN DIFFERENT LIGANDED STATES. JRNL REF J.MOL.BIOL. V. 233 498 1993 JRNL REFN ISSN 0022-2836 JRNL PMID 8411158 JRNL DOI 10.1006/JMBI.1993.1527

REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH C.LIONETTI,M.G.GUANZIROLI,F.FRIGERIO,P.ASCENZI, REMARK 1 AUTH 2 M.BOLOGNESI REMARK 1 TITL X-RAY CRYSTAL STRUCTURE OF THE FERRIC SPERM WHALE REMARK 1 TITL 2 MYOGLOBIN: IMIDAZOLE COMPLEX AT 2.0 ANGSTROMS REMARK 1 TITL 3 RESOLUTION REMARK 1 REF J.MOL.BIOL. V. 217 409 1991 REMARK 1 REFN ISSN 0022-2836 REMARK 1 REFERENCE 2 REMARK 1 AUTH M.BOLOGNESI,F.FRIGERIO,C.LIONETTI,M.RIZZI, REMARK 1 AUTH 2 P.ASCENZI,M.BRUNORI REMARK 1 TITL APLYSIA LIMACINA MYOGLOBIN: MOLECULAR BASES FOR REMARK 1 TITL 2 LIGAND BINDING REMARK 1 EDIT S.N.VINOGRADOV, O.H.KAPP REMARK 1 REF STRUCTURE AND FUNCTION OF 161 1991 REMARK 1 REF 2 INVERTEBRATE OXYGEN CARRIERS REMARK 1 PUBL SPRINGER VERLAG, NEW YORK REMARK 1 REFN REMARK 1 REFERENCE 3 REMARK 1 AUTH A.MATTEVI,G.GATTI,A.CODA,M.RIZZI,P.ASCENZI, REMARK 1 AUTH 2 M.BRUNORI,M.BOLOGNESI REMARK 1 TITL BINDING MODE OF AZIDE TO FERRIC APLYSIA LIMACINA REMARK 1 TITL 2 MYOGLOBIN: CRYSTALLOGRAPHIC ANALYSIS AT 1.9 REMARK 1 TITL 3 ANGSTROMS RESOLUTION REMARK 1 REF J.MOL.RECOG. V. 4 1 1991 REMARK 1 REFN ISSN 0952-3499 REMARK 1 REFERENCE 4 REMARK 1 AUTH M.BOLOGNESI,A.CODA,F.FRIGERIO,G.GATTI,P.ASCENZI, REMARK 1 AUTH 2 M.BRUNORI REMARK 1 TITL X-RAY CRYSTAL STRUCTURE OF THE FLUORIDE DERIVATIVE REMARK 1 TITL 2 OF APLYSIA LIMACINA MYOGLOBIN AT 2.0 ANGSTROMS REMARK 1 TITL 3 RESOLUTION: STABILIZATION OF THE FLUORIDE BY REMARK 1 TITL 4 HYDROGEN BONDING TO ARG66 (E10) REMARK 1 REF J.MOL.BIOL. V. 213 621 1990 REMARK 1 REFN ISSN 0022-2836 REMARK 1 REFERENCE 5 REMARK 1 AUTH M.BOLOGNESI,S.ONESTI,G.GATTI,A.CODA,P.ASCENZI, REMARK 1 AUTH 2 M.BRUNORI REMARK 1 TITL APLYSIA LIMACINA MYOGLOBIN. CRYSTALLOGRAPHIC REMARK 1 TITL 2 ANALYSIS AT 1.6 ANGSTROMS RESOLUTION REMARK 1 REF J.MOL.BIOL. V. 205 529 1989 REMARK 1 REFN ISSN 0022-2836 REMARK 1 REFERENCE 6 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 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) : NULL REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 COMPLETENESS FOR RANGE (%) : NULL REMARK 3 NUMBER OF REFLECTIONS : NULL 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) : 0.161 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 USING ALL DATA, NO SIGMA CUTOFF. 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 : 1086 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 46 REMARK 3 SOLVENT ATOMS : 93 REMARK 3 REMARK 3 WILSON B VALUE (FROM FCALC, A**2) : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. RMS WEIGHT COUNT REMARK 3 BOND LENGTHS (A) : 0.018 ; NULL ; NULL REMARK 3 BOND ANGLES (DEGREES) : 2.900 ; 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 : NULL REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL

REMARK 4 REMARK 4 2FAM 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: NULL REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL

REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 37.71 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.97 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 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 146 CG CD CE NZ

REMARK 480 REMARK 480 ZERO OCCUPANCY ATOM REMARK 480 THE FOLLOWING RESIDUES HAVE ATOMS MODELED WITH ZERO REMARK 480 OCCUPANCY. THE LOCATION AND PROPERTIES OF THESE ATOMS REMARK 480 MAY NOT BE RELIABLE. (M=MODEL NUMBER; RES=RESIDUE NAME; REMARK 480 C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE): REMARK 480 M RES C SSEQI ATOMS REMARK 480 LYS A 12 NZ REMARK 480 ASP A 27 CG OD1 OD2 REMARK 480 LYS A 47 CG CD CE NZ REMARK 480 LYS A 49 CD CE NZ REMARK 480 VAL A 51 CG1 REMARK 480 ARG A 66 CG CD NE CZ NH1 NH2 REMARK 480 LYS A 83 CE NZ REMARK 480 LYS A 93 CE NZ REMARK 480 GLU A 94 CD OE1 OE2 REMARK 480 LYS A 142 CE NZ REMARK 480 GLY A 145 CA C O REMARK 480 LYS A 146 N

REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS REMARK 500 REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC REMARK 500 SYMMETRY ARE IN CLOSE CONTACT. AN ATOM LOCATED WITHIN 0.15 REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375 REMARK 500 INSTEAD OF REMARK 500. ATOMS WITH NON-BLANK ALTERNATE REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS. REMARK 500 REMARK 500 DISTANCE CUTOFF: REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI SSYMOP DISTANCE REMARK 500 OD1 ASN A 80 O HOH A 203 4547 2.02 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 38 CB - CG - OD2 ANGL. DEV. = -5.7 DEGREES REMARK 500 ARG A 109 NE - CZ - NH2 ANGL. DEV. = -4.4 DEGREES 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 156 DISTANCE = 5.36 ANGSTROMS REMARK 525 HOH A 163 DISTANCE = 5.04 ANGSTROMS REMARK 525 HOH A 165 DISTANCE = 5.60 ANGSTROMS REMARK 525 HOH A 196 DISTANCE = 5.76 ANGSTROMS REMARK 525 HOH A 199 DISTANCE = 6.37 ANGSTROMS REMARK 525 HOH A 207 DISTANCE = 5.06 ANGSTROMS REMARK 525 HOH A 210 DISTANCE = 5.07 ANGSTROMS REMARK 525 HOH A 402 DISTANCE = 5.32 ANGSTROMS REMARK 525 HOH A 412 DISTANCE = 5.25 ANGSTROMS REMARK 525 HOH A 414 DISTANCE = 6.07 ANGSTROMS REMARK 525 HOH A 415 DISTANCE = 5.04 ANGSTROMS REMARK 525 HOH A 416 DISTANCE = 5.53 ANGSTROMS REMARK 525 HOH A 419 DISTANCE = 5.24 ANGSTROMS REMARK 525 HOH A 421 DISTANCE = 6.66 ANGSTROMS REMARK 525 HOH A 424 DISTANCE = 6.47 ANGSTROMS

REMARK 615 REMARK 615 ZERO OCCUPANCY ATOM REMARK 615 THE FOLLOWING RESIDUES HAVE ATOMS MODELED WITH ZERO REMARK 615 OCCUPANCY. THE LOCATION AND PROPERTIES OF THESE ATOMS REMARK 615 MAY NOT BE RELIABLE. (M=MODEL NUMBER; RES=RESIDUE NAME; REMARK 615 C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE): REMARK 615 M RES C SSEQI REMARK 615 HEM A 148 REMARK 615 HOH A 173 REMARK 615 HOH A 208 REMARK 615 HOH A 210 REMARK 615 HOH A 406 REMARK 615 HOH A 410 REMARK 615 HOH A 411 REMARK 615 HOH A 413

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 SCN A 149 S REMARK 620 2 HIS A 95 NE2 176.4 REMARK 620 N 1

REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SCN A 149 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE HEM A 148

REMARK 999 REMARK 999 SEQUENCE REMARK 999 REMARK 999 BASED ON ANALYSIS OF THE ELECTRON DENSITY MAPS, SEVERAL REMARK 999 AMINO ACIDS HAVE BEEN REASSIGNED IN THIS ENTRY COMPARED TO REMARK 999 THE SEQUENCE PUBLISHED IN 1973. THE CHANGES ARE AS REMARK 999 FOLLOWS: REMARK 999 REMARK 999 RESIDUE 1973 ENTRY REMARK 999 26 ALA LEU LEU ELECTRON DENSITY SEEN REMARK 999 AFTER SEVERAL OMIT MAPS REMARK 999 REMARK 999 77 ASP ASN MORE APPROPRIATE AS ASN REMARK 999 OWING TO THE APOLAR REMARK 999 ENVIRONMENT (MET 84) REMARK 999 REMARK 999 129 EXTRA ALA CONFIRMED BY SEVERAL REMARK 999 OMIT MAPS REMARK 999 REMARK 999 C-TERMINAL LYS ALA ELECTRON DENSITY ALWAYS REMARK 999 MISSING AFTER CB - MAY BE LYS

DBREF 2FAM A 1 146 UNP P02210 GLB_APLLI 1 146

SEQADV 2FAM ASN A 22 UNP P02210 ASP 22 CONFLICT SEQADV 2FAM LEU A 26 UNP P02210 ASP 26 CONFLICT SEQADV 2FAM ASP A 27 UNP P02210 ALA 27 CONFLICT SEQADV 2FAM 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 LYS

HET ACE A 0 3 HET SCN A 149 3 HET HEM A 148 43

HETNAM ACE ACETYL GROUP HETNAM SCN THIOCYANATE ION HETNAM HEM PROTOPORPHYRIN IX CONTAINING FE

HETSYN HEM HEME

FORMUL 1 ACE C2 H4 O FORMUL 2 SCN C N S 1- FORMUL 3 HEM C34 H32 FE N4 O4 FORMUL 4 HOH *93(H2 O)

HELIX 1 A ALA A 4 ALA A 19 1 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 1 17 HELIX 8 H ALA A 126 ALA A 143 1 18

LINK S SCN A 149 FE HEM A 148 1555 1555 2.29 LINK C ACE A 0 N SER A 1 1555 1555 1.32 LINK NE2 HIS A 95 FE HEM A 148 1555 1555 2.01

SITE 1 AC1 3 PHE A 43 ILE A 67 HEM A 148 SITE 1 AC2 12 PHE A 42 PHE A 43 ILE A 67 ARG A 70 SITE 2 AC2 12 PHE A 91 HIS A 95 PHE A 98 VAL A 100 SITE 3 AC2 12 GLN A 104 PHE A 105 SCN A 149 HOH A 150

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