HEADER OXIDOREDUCTASE 10-JUL-09 3I94 TITLE CRYSTAL STRUCTURE OF PCYA-BILIVERDIN XIII ALPHA COMPLEX COMPND MOL_ID: 1; COMPND 2 MOLECULE: PHYCOCYANOBILIN:FERREDOXIN OXIDOREDUCTASE; COMPND 3 CHAIN: A; COMPND 4 EC: 1.3.7.5; COMPND 5 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: SYNECHOCYSTIS SP. PCC 6803; SOURCE 3 ORGANISM_TAXID: 1148; SOURCE 4 GENE: PCYA, SLR0116; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 7 EXPRESSION_SYSTEM_STRAIN: C41(DE3); SOURCE 8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 9 EXPRESSION_SYSTEM_PLASMID: PET21A KEYWDS ALPHA-BETA-ALPHA SANDWICH, ENZYME-SUBSTRATE ANALOG COMPLEX, KEYWDS 2 OXIDOREDUCTASE EXPDTA X-RAY DIFFRACTION AUTHOR Y.HAGIWARA,M.SUGISHIMA,K.FUKUYAMA REVDAT 2 01-NOV-23 3I94 1 COMPND REMARK HETNAM REVDAT 1 27-OCT-09 3I94 0 JRNL AUTH Y.HAGIWARA,M.SUGISHIMA,H.KHAWN,H.KINOSHITA,K.INOMATA, JRNL AUTH 2 L.SHANG,J.C.LAGARIAS,Y.TAKAHASHI,K.FUKUYAMA JRNL TITL STRUCTURAL INSIGHTS INTO VINYL REDUCTION REGIOSPECIFICITY OF JRNL TITL 2 PHYCOCYANOBILIN:FERREDOXIN OXIDOREDUCTASE (PCYA). JRNL REF TO BE PUBLISHED JRNL REFN REMARK 2 REMARK 2 RESOLUTION. 1.04 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : SHELX REMARK 3 AUTHORS : G.M.SHELDRICK REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.04 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 28.94 REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 COMPLETENESS FOR RANGE (%) : NULL REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT (NO CUTOFF). REMARK 3 R VALUE (WORKING + TEST SET, NO CUTOFF) : NULL REMARK 3 R VALUE (WORKING SET, NO CUTOFF) : 0.125 REMARK 3 FREE R VALUE (NO CUTOFF) : 0.148 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) : 134142 REMARK 3 REMARK 3 FIT/AGREEMENT OF MODEL FOR DATA WITH F>4SIG(F). REMARK 3 R VALUE (WORKING + TEST SET, F>4SIG(F)) : NULL REMARK 3 R VALUE (WORKING SET, F>4SIG(F)) : NULL REMARK 3 FREE R VALUE (F>4SIG(F)) : NULL REMARK 3 FREE R VALUE TEST SET SIZE (%, F>4SIG(F)) : NULL REMARK 3 FREE R VALUE TEST SET COUNT (F>4SIG(F)) : NULL REMARK 3 TOTAL NUMBER OF REFLECTIONS (F>4SIG(F)) : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 1943 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 48 REMARK 3 SOLVENT ATOMS : 375 REMARK 3 REMARK 3 MODEL REFINEMENT. REMARK 3 OCCUPANCY SUM OF NON-HYDROGEN ATOMS : NULL REMARK 3 OCCUPANCY SUM OF HYDROGEN ATOMS : NULL REMARK 3 NUMBER OF DISCRETELY DISORDERED RESIDUES : NULL REMARK 3 NUMBER OF LEAST-SQUARES PARAMETERS : NULL REMARK 3 NUMBER OF RESTRAINTS : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM RESTRAINT TARGET VALUES. REMARK 3 BOND LENGTHS (A) : 0.027 REMARK 3 ANGLE DISTANCES (A) : 2.750 REMARK 3 SIMILAR DISTANCES (NO TARGET VALUES) (A) : NULL REMARK 3 DISTANCES FROM RESTRAINT PLANES (A) : NULL REMARK 3 ZERO CHIRAL VOLUMES (A**3) : NULL REMARK 3 NON-ZERO CHIRAL VOLUMES (A**3) : NULL REMARK 3 ANTI-BUMPING DISTANCE RESTRAINTS (A) : NULL REMARK 3 RIGID-BOND ADP COMPONENTS (A**2) : NULL REMARK 3 SIMILAR ADP COMPONENTS (A**2) : NULL REMARK 3 APPROXIMATELY ISOTROPIC ADPS (A**2) : NULL REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED: NULL REMARK 3 REMARK 3 STEREOCHEMISTRY TARGET VALUES : NULL REMARK 3 SPECIAL CASE: NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN ADDED IN THE RIDING REMARK 3 POSITIONS REMARK 4 REMARK 4 3I94 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 17-JUL-09. REMARK 100 THE DEPOSITION ID IS D_1000054119. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 16-APR-06 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 7.0 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : SPRING-8 REMARK 200 BEAMLINE : BL41XU REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.7085 REMARK 200 MONOCHROMATOR : SI(111) DOUBLE MONOCHROMATER REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 315 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : HKL-2000 REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 134142 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.040 REMARK 200 RESOLUTION RANGE LOW (A) : 28.940 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.4 REMARK 200 DATA REDUNDANCY : 6.000 REMARK 200 R MERGE (I) : 0.04800 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) : 1.04 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.08 REMARK 200 COMPLETENESS FOR SHELL (%) : 98.9 REMARK 200 DATA REDUNDANCY IN SHELL : 4.70 REMARK 200 R MERGE FOR SHELL (I) : 0.27900 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: DIFFERENCE FOURIER REMARK 200 SOFTWARE USED: NULL REMARK 200 STARTING MODEL: PDB ENTRY 2D1E REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 51.60 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.54 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 2.0M AMMONIUM SULFATE, 0.2M SODIUM REMARK 280 CHLORIDE, 0.1M SODIUM CACODYLATE (PH 7.0), VAPOR DIFFUSION, REMARK 280 HANGING DROP, TEMPERATURE 293K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 2 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,-Y,Z REMARK 290 3555 -X+1/2,Y+1/2,-Z 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 0.00000 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 35.39250 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 47.39850 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 35.39250 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 47.39850 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 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC REMARK 350 SOFTWARE USED: PISA 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 375 REMARK 375 SPECIAL POSITION REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL REMARK 375 POSITIONS. REMARK 375 REMARK 375 ATOM RES CSSEQI REMARK 375 HOH A9140 LIES ON A SPECIAL POSITION. REMARK 375 HOH A9182 LIES ON A SPECIAL POSITION. REMARK 465 REMARK 465 MISSING RESIDUES REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.) REMARK 465 REMARK 465 M RES C SSSEQI REMARK 465 MET A 1001 REMARK 465 ALA A 1002 REMARK 465 VAL A 1003 REMARK 465 THR A 1004 REMARK 465 ASP A 1005 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 SER A1007 N - CA - CB ANGL. DEV. = 9.3 DEGREES REMARK 500 MET A1014 CG - SD - CE ANGL. DEV. = -14.1 DEGREES REMARK 500 TYR A1040 CB - CG - CD2 ANGL. DEV. = 4.2 DEGREES REMARK 500 ASP A1045 CB - CG - OD1 ANGL. DEV. = -5.8 DEGREES REMARK 500 ARG A1063 NE - CZ - NH1 ANGL. DEV. = 4.0 DEGREES REMARK 500 ARG A1063 NE - CZ - NH2 ANGL. DEV. = -4.3 DEGREES REMARK 500 TYR A1065 CG - CD2 - CE2 ANGL. DEV. = 7.3 DEGREES REMARK 500 TYR A1065 CZ - CE2 - CD2 ANGL. DEV. = -6.1 DEGREES REMARK 500 GLY A1083 C - N - CA ANGL. DEV. = -14.8 DEGREES REMARK 500 GLY A1083 C - N - CA ANGL. DEV. = 23.1 DEGREES REMARK 500 TYR A1097 CG - CD2 - CE2 ANGL. DEV. = 4.9 DEGREES REMARK 500 CYS A1104 CB - CA - C ANGL. DEV. = 8.2 DEGREES REMARK 500 CYS A1104 CA - CB - SG ANGL. DEV. = 14.3 DEGREES REMARK 500 ARG A1127 NE - CZ - NH2 ANGL. DEV. = -3.5 DEGREES REMARK 500 LYS A1135 CA - CB - CG ANGL. DEV. = 14.6 DEGREES REMARK 500 GLU A1150 OE1 - CD - OE2 ANGL. DEV. = -7.6 DEGREES REMARK 500 ARG A1166 NE - CZ - NH1 ANGL. DEV. = -6.8 DEGREES REMARK 500 ARG A1166 NE - CZ - NH2 ANGL. DEV. = 6.3 DEGREES REMARK 500 ARG A1175 NE - CZ - NH2 ANGL. DEV. = -3.9 DEGREES REMARK 500 ARG A1179 NH1 - CZ - NH2 ANGL. DEV. = 9.2 DEGREES REMARK 500 ARG A1179 NE - CZ - NH1 ANGL. DEV. = 6.3 DEGREES REMARK 500 ARG A1179 NE - CZ - NH1 ANGL. DEV. = 4.7 DEGREES REMARK 500 ARG A1179 NE - CZ - NH2 ANGL. DEV. = -13.9 DEGREES REMARK 500 PHE A1183 CB - CG - CD1 ANGL. DEV. = 5.1 DEGREES REMARK 500 VAL A1193 C - N - CA ANGL. DEV. = -23.4 DEGREES REMARK 500 GLU A1204 OE1 - CD - OE2 ANGL. DEV. = -7.2 DEGREES REMARK 500 ARG A1206 CD - NE - CZ ANGL. DEV. = 29.6 DEGREES REMARK 500 ARG A1206 NE - CZ - NH2 ANGL. DEV. = 8.0 DEGREES REMARK 500 ASP A1220 CB - CG - OD2 ANGL. DEV. = 6.9 DEGREES REMARK 500 ARG A1237 NE - CZ - NH1 ANGL. DEV. = -4.7 DEGREES REMARK 500 ARG A1237 NE - CZ - NH2 ANGL. DEV. = -3.8 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 LEU A1008 15.99 -69.84 REMARK 500 LEU A1053 -106.53 -118.44 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: NON-CIS, NON-TRANS REMARK 500 REMARK 500 THE FOLLOWING PEPTIDE BONDS DEVIATE SIGNIFICANTLY FROM BOTH REMARK 500 CIS AND TRANS CONFORMATION. CIS BONDS, IF ANY, ARE LISTED REMARK 500 ON CISPEP RECORDS. TRANS IS DEFINED AS 180 +/- 30 AND REMARK 500 CIS IS DEFINED AS 0 +/- 30 DEGREES. REMARK 500 MODEL OMEGA REMARK 500 LYS A 1082 GLY A 1083 -147.95 REMARK 500 REMARK 500 REMARK: NULL REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BL3 A 2130 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 6610 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 2D1E RELATED DB: PDB REMARK 900 THE SAME PROTEIN COMPLEXED WITH BILIVERDIN IX ALPHA REMARK 900 RELATED ID: 2DKE RELATED DB: PDB REMARK 900 THE SAME PROTEIN OF SUBSTRATE FREE-FORM REMARK 900 RELATED ID: 3I8U RELATED DB: PDB REMARK 900 RELATED ID: 3I95 RELATED DB: PDB DBREF 3I94 A 1001 1248 UNP Q55891 PCYA_SYNY3 1 248 SEQRES 1 A 248 MET ALA VAL THR ASP LEU SER LEU THR ASN SER SER LEU SEQRES 2 A 248 MET PRO THR LEU ASN PRO MET ILE GLN GLN LEU ALA LEU SEQRES 3 A 248 ALA ILE ALA ALA SER TRP GLN SER LEU PRO LEU LYS PRO SEQRES 4 A 248 TYR GLN LEU PRO GLU ASP LEU GLY TYR VAL GLU GLY ARG SEQRES 5 A 248 LEU GLU GLY GLU LYS LEU VAL ILE GLU ASN ARG CYS TYR SEQRES 6 A 248 GLN THR PRO GLN PHE ARG LYS MET HIS LEU GLU LEU ALA SEQRES 7 A 248 LYS VAL GLY LYS GLY LEU ASP ILE LEU HIS CYS VAL MET SEQRES 8 A 248 PHE PRO GLU PRO LEU TYR GLY LEU PRO LEU PHE GLY CYS SEQRES 9 A 248 ASP ILE VAL ALA GLY PRO GLY GLY VAL SER ALA ALA ILE SEQRES 10 A 248 ALA ASP LEU SER PRO THR GLN SER ASP ARG GLN LEU PRO SEQRES 11 A 248 ALA ALA TYR GLN LYS SER LEU ALA GLU LEU GLY GLN PRO SEQRES 12 A 248 GLU PHE GLU GLN GLN ARG GLU LEU PRO PRO TRP GLY GLU SEQRES 13 A 248 ILE PHE SER GLU TYR CYS LEU PHE ILE ARG PRO SER ASN SEQRES 14 A 248 VAL THR GLU GLU GLU ARG PHE VAL GLN ARG VAL VAL ASP SEQRES 15 A 248 PHE LEU GLN ILE HIS CYS HIS GLN SER ILE VAL ALA GLU SEQRES 16 A 248 PRO LEU SER GLU ALA GLN THR LEU GLU HIS ARG GLN GLY SEQRES 17 A 248 GLN ILE HIS TYR CYS GLN GLN GLN GLN LYS ASN ASP LYS SEQRES 18 A 248 THR ARG ARG VAL LEU GLU LYS ALA PHE GLY GLU ALA TRP SEQRES 19 A 248 ALA GLU ARG TYR MET SER GLN VAL LEU PHE ASP VAL ILE SEQRES 20 A 248 GLN HET BL3 A2130 43 HET SO4 A6610 5 HETNAM BL3 3-[2-[(Z)-[3-(2-CARBOXYETHYL)-5-[(Z)-(3-ETHENYL-4- HETNAM 2 BL3 METHYL-5-OXO-PYRROL-2-YLIDENE)METHYL]-4-METHYL-PYRROL- HETNAM 3 BL3 2-YLIDENE]METHY L]-5-[(Z)-(3-ETHENYL-4-METHYL-5-OXO- HETNAM 4 BL3 PYRROL-2-YLIDENE)METHYL]-4-METHYL-1H-PYRROL-3- HETNAM 5 BL3 YL]PROPANOIC ACID HETNAM SO4 SULFATE ION HETSYN BL3 BILIVERDIN XIII ALPHA FORMUL 2 BL3 C33 H34 N4 O6 FORMUL 3 SO4 O4 S 2- FORMUL 4 HOH *375(H2 O) HELIX 1 1 SER A 1007 SER A 1011 5 5 HELIX 2 2 LEU A 1013 LEU A 1017 5 5 HELIX 3 3 ASN A 1018 GLN A 1033 1 16 HELIX 4 4 LEU A 1042 LEU A 1046 5 5 HELIX 5 5 PRO A 1095 GLY A 1098 5 4 HELIX 6 6 PRO A 1130 LEU A 1140 1 11 HELIX 7 7 PRO A 1152 PHE A 1158 5 7 HELIX 8 8 ASN A 1169 ALA A 1194 1 26 HELIX 9 9 SER A 1198 GLN A 1217 1 20 HELIX 10 10 ASN A 1219 GLY A 1231 1 13 HELIX 11 11 GLY A 1231 VAL A 1242 1 12 SHEET 1 A 3 LYS A1038 PRO A1039 0 SHEET 2 A 3 LEU A1058 GLN A1066 -1 O GLN A1066 N LYS A1038 SHEET 3 A 3 VAL A1049 GLY A1051 -1 N VAL A1049 O ILE A1060 SHEET 1 B 7 LYS A1038 PRO A1039 0 SHEET 2 B 7 LEU A1058 GLN A1066 -1 O GLN A1066 N LYS A1038 SHEET 3 B 7 PHE A1070 VAL A1080 -1 O LEU A1077 N GLU A1061 SHEET 4 B 7 LEU A1084 PRO A1093 -1 O PHE A1092 N LYS A1072 SHEET 5 B 7 LEU A1101 GLY A1109 -1 O ALA A1108 N ASP A1085 SHEET 6 B 7 GLY A1112 SER A1121 -1 O SER A1121 N LEU A1101 SHEET 7 B 7 LEU A1163 ILE A1165 -1 O LEU A1163 N ALA A1118 SITE 1 AC1 26 SER A1034 GLU A1076 ILE A1086 HIS A1088 SITE 2 AC1 26 VAL A1090 GLY A1103 ASP A1105 VAL A1107 SITE 3 AC1 26 SER A1114 ALA A1115 ARG A1149 PHE A1158 SITE 4 AC1 26 PHE A1164 GLN A1216 ASN A1219 LYS A1221 SITE 5 AC1 26 THR A1222 VAL A1225 LEU A1226 PHE A1244 SITE 6 AC1 26 HOH A9027 HOH A9042 HOH A9053 HOH A9080 SITE 7 AC1 26 HOH A9147 HOH A9201 SITE 1 AC2 6 TYR A1048 GLU A1050 ARG A1052 LYS A1057 SITE 2 AC2 6 HOH A9182 HOH A9314 CRYST1 70.785 94.797 42.653 90.00 90.00 90.00 P 21 21 2 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 0.014127 0.000000 0.000000 0.00000 SCALE2 0.000000 0.010549 0.000000 0.00000 SCALE3 0.000000 0.000000 0.023445 0.00000