HEADER METAL BINDING PROTEIN 16-FEB-21 7LRA TITLE NI-BOUND CRYSTAL STRUCTURE OF THE ENGINEERED CYT CB562 VARIANT, TITLE 2 DICYT2, CRYSTALLIZED IN THE PRESENCE OF CU(II) (M1) AND NI(II) (M2) COMPND MOL_ID: 1; COMPND 2 MOLECULE: SOLUBLE CYTOCHROME B562; COMPND 3 CHAIN: C, A; COMPND 4 SYNONYM: CYTOCHROME B-562; COMPND 5 ENGINEERED: YES; COMPND 6 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI; SOURCE 3 ORGANISM_TAXID: 562; SOURCE 4 GENE: CYBC; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562 KEYWDS METAL SELECTIVITY, IRVING-WILLIAMS SERIES, METAL BINDING PROTEIN EXPDTA X-RAY DIFFRACTION AUTHOR T.S.CHOI,F.A.TEZCAN REVDAT 3 25-OCT-23 7LRA 1 REMARK REVDAT 2 08-MAR-23 7LRA 1 JRNL REVDAT 1 23-FEB-22 7LRA 0 JRNL AUTH T.S.CHOI,F.A.TEZCAN JRNL TITL OVERCOMING UNIVERSAL RESTRICTIONS ON METAL SELECTIVITY BY JRNL TITL 2 PROTEIN DESIGN. JRNL REF NATURE V. 603 522 2022 JRNL REFN ESSN 1476-4687 JRNL PMID 35236987 JRNL DOI 10.1038/S41586-022-04469-8 REMARK 2 REMARK 2 RESOLUTION. 1.70 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : PHENIX 1.15.2_3472 REMARK 3 AUTHORS : PAUL ADAMS,PAVEL AFONINE,VINCENT CHEN,IAN REMARK 3 : DAVIS,KRESHNA GOPAL,RALF GROSSE-KUNSTLEVE, REMARK 3 : LI-WEI HUNG,ROBERT IMMORMINO,TOM IOERGER, REMARK 3 : AIRLIE MCCOY,ERIK MCKEE,NIGEL MORIARTY, REMARK 3 : REETAL PAI,RANDY READ,JANE RICHARDSON, REMARK 3 : DAVID RICHARDSON,TOD ROMO,JIM SACCHETTINI, REMARK 3 : NICHOLAS SAUTER,JACOB SMITH,LAURENT REMARK 3 : STORONI,TOM TERWILLIGER,PETER ZWART REMARK 3 REMARK 3 REFINEMENT TARGET : GEOSTD + MONOMER LIBRARY + CDL V1.2 REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.70 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 41.65 REMARK 3 MIN(FOBS/SIGMA_FOBS) : 1.340 REMARK 3 COMPLETENESS FOR RANGE (%) : 99.0 REMARK 3 NUMBER OF REFLECTIONS : 24165 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 R VALUE (WORKING + TEST SET) : 0.183 REMARK 3 R VALUE (WORKING SET) : 0.180 REMARK 3 FREE R VALUE : 0.214 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 8.340 REMARK 3 FREE R VALUE TEST SET COUNT : 3769 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT (IN BINS). REMARK 3 BIN RESOLUTION RANGE COMPL. NWORK NFREE RWORK RFREE REMARK 3 1 41.6500 - 5.1000 1.00 1527 160 0.1564 0.1683 REMARK 3 2 5.1000 - 4.0500 1.00 1549 138 0.1598 0.1746 REMARK 3 3 4.0500 - 3.5400 0.99 1545 136 0.1633 0.2035 REMARK 3 4 3.5400 - 3.2100 1.00 1557 130 0.1723 0.2102 REMARK 3 5 3.2100 - 2.9800 1.00 1538 152 0.1993 0.2451 REMARK 3 6 2.9800 - 2.8100 1.00 1546 142 0.1924 0.1861 REMARK 3 7 2.8100 - 2.6700 0.99 1532 144 0.1907 0.2128 REMARK 3 8 2.6700 - 2.5500 0.98 1521 133 0.1877 0.2729 REMARK 3 9 2.5500 - 2.4500 0.99 1555 140 0.1811 0.2565 REMARK 3 10 2.4500 - 2.3700 0.99 1532 125 0.1928 0.1980 REMARK 3 11 2.3700 - 2.2900 1.00 1572 150 0.1887 0.2134 REMARK 3 12 2.2900 - 2.2300 1.00 1538 141 0.1832 0.2679 REMARK 3 13 2.2300 - 2.1700 0.99 1524 121 0.1845 0.2037 REMARK 3 14 2.1700 - 2.1200 0.97 1517 143 0.1824 0.1984 REMARK 3 15 2.1200 - 2.0700 0.99 1533 163 0.1745 0.2095 REMARK 3 16 2.0700 - 2.0200 0.99 1521 128 0.1781 0.2864 REMARK 3 17 2.0200 - 1.9800 1.00 1572 150 0.1892 0.1948 REMARK 3 18 1.9800 - 1.9500 1.00 1524 150 0.1892 0.2709 REMARK 3 19 1.9500 - 1.9100 0.99 1540 136 0.1977 0.2455 REMARK 3 20 1.9100 - 1.8800 0.98 1516 131 0.1856 0.2625 REMARK 3 21 1.8800 - 1.8500 0.97 1495 146 0.1831 0.1982 REMARK 3 22 1.8500 - 1.8200 0.98 1517 140 0.1808 0.1861 REMARK 3 23 1.8200 - 1.7900 0.99 1547 115 0.1764 0.2209 REMARK 3 24 1.7900 - 1.7700 0.99 1533 152 0.1867 0.2206 REMARK 3 25 1.7700 - 1.7400 0.99 1549 131 0.1893 0.2263 REMARK 3 26 1.7400 - 1.7200 0.99 1543 142 0.2257 0.2350 REMARK 3 27 1.7200 - 1.7000 0.97 1498 130 0.2283 0.2838 REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : FLAT BULK SOLVENT MODEL REMARK 3 SOLVENT RADIUS : 1.11 REMARK 3 SHRINKAGE RADIUS : 0.90 REMARK 3 K_SOL : NULL REMARK 3 B_SOL : NULL REMARK 3 REMARK 3 ERROR ESTIMATES. REMARK 3 COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED) : 0.172 REMARK 3 PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : 21.149 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 17.98 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 21.82 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 TWINNING INFORMATION. REMARK 3 FRACTION: NULL REMARK 3 OPERATOR: NULL REMARK 3 REMARK 3 DEVIATIONS FROM IDEAL VALUES. REMARK 3 RMSD COUNT REMARK 3 BOND : 0.006 1768 REMARK 3 ANGLE : 0.775 2420 REMARK 3 CHIRALITY : 0.040 244 REMARK 3 PLANARITY : 0.005 317 REMARK 3 DIHEDRAL : 11.672 1244 REMARK 3 REMARK 3 TLS DETAILS REMARK 3 NUMBER OF TLS GROUPS : NULL REMARK 3 REMARK 3 NCS DETAILS REMARK 3 NUMBER OF NCS GROUPS : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 7LRA COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 16-FEB-21. REMARK 100 THE DEPOSITION ID IS D_1000254879. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 04-JUL-20 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 8.4 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : SSRL REMARK 200 BEAMLINE : BL9-2 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.48 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : PIXEL REMARK 200 DETECTOR MANUFACTURER : DECTRIS PILATUS 6M REMARK 200 INTENSITY-INTEGRATION SOFTWARE : IMOSFLM REMARK 200 DATA SCALING SOFTWARE : AIMLESS REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 24213 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.700 REMARK 200 RESOLUTION RANGE LOW (A) : 41.650 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.5 REMARK 200 DATA REDUNDANCY : 28.40 REMARK 200 R MERGE (I) : 0.77540 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 49.4600 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.70 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.76 REMARK 200 COMPLETENESS FOR SHELL (%) : 99.4 REMARK 200 DATA REDUNDANCY IN SHELL : 26.80 REMARK 200 R MERGE FOR SHELL (I) : 0.85030 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : 8.630 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: PHASER REMARK 200 STARTING MODEL: 2BC5 REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 45.29 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.25 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PEG1500 25%, AMMONIUM ACETATE 200 MM, REMARK 280 PH 8.4 EPPS 100 MM, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE REMARK 280 293K 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 27.38000 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 32.08000 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 30.50000 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 32.08000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 27.38000 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 30.50000 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: DIMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 3300 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 11490 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -66.0 KCAL/MOL REMARK 350 APPLY THE FOLLOWING TO CHAINS: C, 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 GLU C 49 CG CD OE1 OE2 REMARK 470 ASP C 50 CG OD1 OD2 REMARK 470 LYS C 51 CE NZ REMARK 470 GLU C 92 CG CD OE1 OE2 REMARK 470 GLU A 18 CG CD OE1 OE2 REMARK 470 GLN A 41 OE1 NE2 REMARK 470 LYS A 42 CG CD CE NZ REMARK 470 THR A 44 OG1 CG2 REMARK 470 LYS A 47 CE NZ REMARK 470 GLU A 49 CG CD OE1 OE2 REMARK 470 ASP A 50 CG OD1 OD2 REMARK 470 LYS A 51 CE NZ 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 O HOH C 335 O HOH C 428 2.12 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 HEC C 201 FE REMARK 620 N RES CSSEQI ATOM REMARK 620 1 MET C 7 SD REMARK 620 2 HEC C 201 NA 89.4 REMARK 620 3 HEC C 201 NB 86.0 90.9 REMARK 620 4 HEC C 201 NC 91.6 179.0 89.5 REMARK 620 5 HEC C 201 ND 93.8 90.6 178.5 89.1 REMARK 620 6 HIS C 102 NE2 172.3 87.7 86.9 91.4 93.3 REMARK 620 N 1 2 3 4 5 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 NI C 202 NI REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS C 60 NE2 REMARK 620 2 HIS C 100 NE2 94.6 REMARK 620 3 HIS C 104 NE2 91.9 92.9 REMARK 620 4 HOH C 383 O 84.4 176.5 90.6 REMARK 620 5 HIS A 67 NE2 90.4 88.4 177.3 88.2 REMARK 620 6 HIS A 71 NE2 172.1 92.7 90.8 88.1 86.7 REMARK 620 N 1 2 3 4 5 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 NI A 202 NI REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS C 67 NE2 REMARK 620 2 HIS C 71 NE2 89.5 REMARK 620 3 HIS A 60 NE2 88.7 169.5 REMARK 620 4 HIS A 100 NE2 90.3 99.3 91.0 REMARK 620 5 HIS A 104 NE2 177.5 89.4 92.0 92.1 REMARK 620 6 HOH A 359 O 90.4 86.3 83.4 174.3 87.2 REMARK 620 N 1 2 3 4 5 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 HEC A 201 FE REMARK 620 N RES CSSEQI ATOM REMARK 620 1 MET A 7 SD REMARK 620 2 HEC A 201 NA 87.6 REMARK 620 3 HEC A 201 NB 84.9 89.6 REMARK 620 4 HEC A 201 NC 91.4 178.8 89.8 REMARK 620 5 HEC A 201 ND 94.2 90.3 179.1 90.3 REMARK 620 6 HIS A 102 NE2 172.7 88.3 89.1 92.7 91.8 REMARK 620 N 1 2 3 4 5 DBREF 7LRA C 1 106 UNP P0ABE7 C562_ECOLX 23 128 DBREF 7LRA A 1 106 UNP P0ABE7 C562_ECOLX 23 128 SEQADV 7LRA TRP C 59 UNP P0ABE7 LYS 81 CONFLICT SEQADV 7LRA HIS C 60 UNP P0ABE7 ASP 82 ENGINEERED MUTATION SEQADV 7LRA HIS C 67 UNP P0ABE7 ILE 89 ENGINEERED MUTATION SEQADV 7LRA HIS C 71 UNP P0ABE7 GLN 93 ENGINEERED MUTATION SEQADV 7LRA CYS C 96 UNP P0ABE7 THR 118 CONFLICT SEQADV 7LRA HIS C 97 UNP P0ABE7 THR 119 ENGINEERED MUTATION SEQADV 7LRA CYS C 98 UNP P0ABE7 ARG 120 CONFLICT SEQADV 7LRA HIS C 100 UNP P0ABE7 ALA 122 ENGINEERED MUTATION SEQADV 7LRA CYS C 101 UNP P0ABE7 TYR 123 CONFLICT SEQADV 7LRA HIS C 104 UNP P0ABE7 LYS 126 ENGINEERED MUTATION SEQADV 7LRA TRP A 59 UNP P0ABE7 LYS 81 CONFLICT SEQADV 7LRA HIS A 60 UNP P0ABE7 ASP 82 ENGINEERED MUTATION SEQADV 7LRA HIS A 67 UNP P0ABE7 ILE 89 ENGINEERED MUTATION SEQADV 7LRA HIS A 71 UNP P0ABE7 GLN 93 ENGINEERED MUTATION SEQADV 7LRA CYS A 96 UNP P0ABE7 THR 118 CONFLICT SEQADV 7LRA HIS A 97 UNP P0ABE7 THR 119 ENGINEERED MUTATION SEQADV 7LRA CYS A 98 UNP P0ABE7 ARG 120 CONFLICT SEQADV 7LRA HIS A 100 UNP P0ABE7 ALA 122 ENGINEERED MUTATION SEQADV 7LRA CYS A 101 UNP P0ABE7 TYR 123 CONFLICT SEQADV 7LRA HIS A 104 UNP P0ABE7 LYS 126 ENGINEERED MUTATION SEQRES 1 C 106 ALA ASP LEU GLU ASP ASN MET GLU THR LEU ASN ASP ASN SEQRES 2 C 106 LEU LYS VAL ILE GLU LYS ALA ASP ASN ALA ALA GLN VAL SEQRES 3 C 106 LYS ASP ALA LEU THR LYS MET ARG ALA ALA ALA LEU ASP SEQRES 4 C 106 ALA GLN LYS ALA THR PRO PRO LYS LEU GLU ASP LYS SER SEQRES 5 C 106 PRO ASP SER PRO GLU MET TRP HIS PHE ARG HIS GLY PHE SEQRES 6 C 106 ASP HIS LEU VAL GLY HIS ILE ASP ASP ALA LEU LYS LEU SEQRES 7 C 106 ALA ASN GLU GLY LYS VAL LYS GLU ALA GLN ALA ALA ALA SEQRES 8 C 106 GLU GLN LEU LYS CYS HIS CYS ASN HIS CYS HIS GLN HIS SEQRES 9 C 106 TYR ARG SEQRES 1 A 106 ALA ASP LEU GLU ASP ASN MET GLU THR LEU ASN ASP ASN SEQRES 2 A 106 LEU LYS VAL ILE GLU LYS ALA ASP ASN ALA ALA GLN VAL SEQRES 3 A 106 LYS ASP ALA LEU THR LYS MET ARG ALA ALA ALA LEU ASP SEQRES 4 A 106 ALA GLN LYS ALA THR PRO PRO LYS LEU GLU ASP LYS SER SEQRES 5 A 106 PRO ASP SER PRO GLU MET TRP HIS PHE ARG HIS GLY PHE SEQRES 6 A 106 ASP HIS LEU VAL GLY HIS ILE ASP ASP ALA LEU LYS LEU SEQRES 7 A 106 ALA ASN GLU GLY LYS VAL LYS GLU ALA GLN ALA ALA ALA SEQRES 8 A 106 GLU GLN LEU LYS CYS HIS CYS ASN HIS CYS HIS GLN HIS SEQRES 9 A 106 TYR ARG HET HEC C 201 43 HET NI C 202 1 HET HEC A 201 43 HET NI A 202 1 HETNAM HEC HEME C HETNAM NI NICKEL (II) ION FORMUL 3 HEC 2(C34 H34 FE N4 O4) FORMUL 4 NI 2(NI 2+) FORMUL 7 HOH *245(H2 O) HELIX 1 AA1 ASP C 2 ALA C 20 1 19 HELIX 2 AA2 ALA C 23 GLN C 41 1 19 HELIX 3 AA3 PRO C 45 GLU C 49 5 5 HELIX 4 AA4 SER C 55 GLU C 81 1 27 HELIX 5 AA5 LYS C 83 GLN C 93 1 11 HELIX 6 AA6 LEU C 94 ARG C 106 1 13 HELIX 7 AA7 ASP A 2 ALA A 20 1 19 HELIX 8 AA8 ASN A 22 LYS A 42 1 21 HELIX 9 AA9 SER A 55 GLU A 81 1 27 HELIX 10 AB1 LYS A 83 LEU A 94 1 12 HELIX 11 AB2 LEU A 94 ARG A 106 1 13 SSBOND 1 CYS C 96 CYS A 96 1555 1555 2.02 LINK SG CYS C 98 CAB HEC C 201 1555 1555 1.77 LINK SG CYS C 101 CAC HEC C 201 1555 1555 1.77 LINK SG CYS A 98 CAB HEC A 201 1555 1555 1.77 LINK SG CYS A 101 CAC HEC A 201 1555 1555 1.77 LINK SD MET C 7 FE HEC C 201 1555 1555 2.39 LINK NE2 HIS C 60 NI NI C 202 1555 1555 2.22 LINK NE2 HIS C 67 NI NI A 202 1555 1555 2.07 LINK NE2 HIS C 71 NI NI A 202 1555 1555 2.19 LINK NE2 HIS C 100 NI NI C 202 1555 1555 2.09 LINK NE2 HIS C 102 FE HEC C 201 1555 1555 2.14 LINK NE2 HIS C 104 NI NI C 202 1555 1555 2.11 LINK NI NI C 202 O HOH C 383 1555 1555 2.21 LINK NI NI C 202 NE2 HIS A 67 1555 1555 2.17 LINK NI NI C 202 NE2 HIS A 71 1555 1555 2.16 LINK SD MET A 7 FE HEC A 201 1555 1555 2.53 LINK NE2 HIS A 60 NI NI A 202 1555 1555 2.18 LINK NE2 HIS A 100 NI NI A 202 1555 1555 2.09 LINK NE2 HIS A 102 FE HEC A 201 1555 1555 2.19 LINK NE2 HIS A 104 NI NI A 202 1555 1555 2.23 LINK NI NI A 202 O HOH A 359 1555 1555 2.22 CRYST1 54.760 61.000 64.160 90.00 90.00 90.00 P 21 21 21 8 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 0.018262 0.000000 0.000000 0.00000 SCALE2 0.000000 0.016393 0.000000 0.00000 SCALE3 0.000000 0.000000 0.015586 0.00000