HEADER METAL BINDING PROTEIN,UNKNOWN FUNCTION 10-APR-08 3CSX TITLE STRUCTURAL CHARACTERIZATION OF A PROTEIN IN THE DUF683 FAMILY- CRYSTAL TITLE 2 STRUCTURE OF CCE_0567 FROM THE CYANOBACTERIUM CYANOTHECE 51142. COMPND MOL_ID: 1; COMPND 2 MOLECULE: PUTATIVE UNCHARACTERIZED PROTEIN; COMPND 3 CHAIN: A, B; COMPND 4 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: CYANOTHECE; SOURCE 3 STRAIN: ATCC 51142; SOURCE 4 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 5 EXPRESSION_SYSTEM_STRAIN: BL21(DE3); SOURCE 6 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 7 EXPRESSION_SYSTEM_PLASMID: PET28B KEYWDS METALLOPROTEIN, NITROGEN FIXATION, CYANOBACTERIA, CIRCADIAN RHYTHMS, KEYWDS 2 METAL BINDING PROTEIN, UNKNOWN FUNCTION EXPDTA X-RAY DIFFRACTION AUTHOR A.ADDLAGATTA,H.ROBINSON,G.W.BUCHKO REVDAT 5 21-FEB-24 3CSX 1 REMARK SEQADV REVDAT 4 08-SEP-09 3CSX 1 JRNL REVDAT 3 24-MAR-09 3CSX 1 JRNL REVDAT 2 24-FEB-09 3CSX 1 VERSN REVDAT 1 10-JUN-08 3CSX 0 JRNL AUTH G.W.BUCHKO,H.ROBINSON,A.ADDLAGATTA JRNL TITL STRUCTURAL CHARACTERIZATION OF THE PROTEIN CCE_0567 FROM JRNL TITL 2 CYANOTHECE 51142, A METALLOPROTEIN ASSOCIATED WITH NITROGEN JRNL TITL 3 FIXATION IN THE DUF683 FAMILY. JRNL REF BIOCHIM.BIOPHYS.ACTA V.1794 627 2009 JRNL REFN ISSN 0006-3002 JRNL PMID 19336042 JRNL DOI 10.1016/J.BBAPAP.2009.01.002 REMARK 2 REMARK 2 RESOLUTION. 1.84 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.2.0019 REMARK 3 AUTHORS : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER, REMARK 3 : NICHOLLS,WINN,LONG,VAGIN REMARK 3 REMARK 3 REFINEMENT TARGET : MAXIMUM LIKELIHOOD REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.84 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 29.24 REMARK 3 DATA CUTOFF (SIGMA(F)) : 2.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 100.0 REMARK 3 NUMBER OF REFLECTIONS : 10674 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : THROUGHOUT REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 R VALUE (WORKING + TEST SET) : 0.220 REMARK 3 R VALUE (WORKING SET) : 0.216 REMARK 3 FREE R VALUE : 0.294 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 4.900 REMARK 3 FREE R VALUE TEST SET COUNT : 552 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 20 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 1.84 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.89 REMARK 3 REFLECTION IN BIN (WORKING SET) : 371 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 100.0 REMARK 3 BIN R VALUE (WORKING SET) : 0.2610 REMARK 3 BIN FREE R VALUE SET COUNT : 19 REMARK 3 BIN FREE R VALUE : 0.4200 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 1083 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 1 REMARK 3 SOLVENT ATOMS : 96 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 28.15 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 0.04000 REMARK 3 B22 (A**2) : 0.04000 REMARK 3 B33 (A**2) : -0.09000 REMARK 3 B12 (A**2) : 0.00000 REMARK 3 B13 (A**2) : 0.00000 REMARK 3 B23 (A**2) : 0.00000 REMARK 3 REMARK 3 ESTIMATED OVERALL COORDINATE ERROR. REMARK 3 ESU BASED ON R VALUE (A): 0.180 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.183 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.108 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 3.359 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.938 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.894 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 1097 ; 0.015 ; 0.022 REMARK 3 BOND LENGTHS OTHERS (A): NULL ; NULL ; NULL REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 1470 ; 1.506 ; 1.995 REMARK 3 BOND ANGLES OTHERS (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 1 (DEGREES): 130 ; 5.293 ; 5.000 REMARK 3 TORSION ANGLES, PERIOD 2 (DEGREES): 54 ;34.195 ;26.667 REMARK 3 TORSION ANGLES, PERIOD 3 (DEGREES): 234 ;16.686 ;15.000 REMARK 3 TORSION ANGLES, PERIOD 4 (DEGREES): 4 ;10.866 ;15.000 REMARK 3 CHIRAL-CENTER RESTRAINTS (A**3): 163 ; 0.109 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 794 ; 0.006 ; 0.020 REMARK 3 GENERAL PLANES OTHERS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED CONTACTS REFINED ATOMS (A): 545 ; 0.234 ; 0.200 REMARK 3 NON-BONDED CONTACTS OTHERS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED TORSION REFINED ATOMS (A): 774 ; 0.307 ; 0.200 REMARK 3 NON-BONDED TORSION OTHERS (A): NULL ; NULL ; NULL REMARK 3 H-BOND (X...Y) REFINED ATOMS (A): 71 ; 0.133 ; 0.200 REMARK 3 H-BOND (X...Y) OTHERS (A): NULL ; NULL ; NULL REMARK 3 POTENTIAL METAL-ION REFINED ATOMS (A): 2 ; 0.287 ; 0.200 REMARK 3 POTENTIAL METAL-ION OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY VDW REFINED ATOMS (A): 75 ; 0.254 ; 0.200 REMARK 3 SYMMETRY VDW OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY H-BOND REFINED ATOMS (A): 22 ; 0.132 ; 0.200 REMARK 3 SYMMETRY H-BOND OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY METAL-ION REFINED ATOMS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY METAL-ION OTHERS (A): NULL ; NULL ; NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. COUNT RMS WEIGHT REMARK 3 MAIN-CHAIN BOND REFINED ATOMS (A**2): 691 ; 1.032 ; 1.500 REMARK 3 MAIN-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE REFINED ATOMS (A**2): 1058 ; 1.630 ; 2.000 REMARK 3 MAIN-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN BOND REFINED ATOMS (A**2): 471 ; 2.911 ; 3.000 REMARK 3 SIDE-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): 412 ; 4.613 ; 4.500 REMARK 3 SIDE-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 LONG RANGE B REFINED ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 LONG RANGE B OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 REMARK 3 ANISOTROPIC THERMAL FACTOR RESTRAINTS. COUNT RMS WEIGHT REMARK 3 RIGID-BOND RESTRAINTS (A**2): NULL ; NULL ; NULL REMARK 3 SPHERICITY; FREE ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SPHERICITY; BONDED ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 REMARK 3 NCS RESTRAINTS STATISTICS REMARK 3 NUMBER OF DIFFERENT NCS GROUPS : NULL REMARK 3 REMARK 3 TLS DETAILS REMARK 3 NUMBER OF TLS GROUPS : NULL REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : MASK REMARK 3 PARAMETERS FOR MASK CALCULATION REMARK 3 VDW PROBE RADIUS : 1.20 REMARK 3 ION PROBE RADIUS : 0.80 REMARK 3 SHRINKAGE RADIUS : 0.80 REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN ADDED IN THE RIDING REMARK 3 POSITIONS REMARK 4 REMARK 4 3CSX COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 15-APR-08. REMARK 100 THE DEPOSITION ID IS D_1000047171. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 15-OCT-07 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 7.2 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : NSLS REMARK 200 BEAMLINE : X29A REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.97935 REMARK 200 MONOCHROMATOR : SI 111 CHANNEL 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 : 11230 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.840 REMARK 200 RESOLUTION RANGE LOW (A) : 30.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 1.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 92.0 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) : 1.84 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.92 REMARK 200 COMPLETENESS FOR SHELL (%) : 52.0 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: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: SAD REMARK 200 SOFTWARE USED: SHELXS REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 34.99 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.89 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 2 UL PROTEIN (~2 MG/ML PROTEIN IN 500 REMARK 280 MM NACL, 20 MM TRISHCL, 1.0 MM DTT, PH 7.2) PLUS 2 UL REMARK 280 PRECIPATANT (30% W/V PEG 1500, 1 MM NICL2)., VAPOR DIFFUSION, REMARK 280 HANGING DROP, TEMPERATURE 295K 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 19.19050 REMARK 290 SMTRY3 2 0.000000 0.000000 -1.000000 0.00000 REMARK 290 REMARK 290 REMARK: NULL REMARK 300 REMARK 300 BIOMOLECULE: 1, 2 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 APPLY THE FOLLOWING TO CHAINS: A, B 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 350 REMARK 350 BIOMOLECULE: 2 REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 1850 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 9010 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -17.3 KCAL/MOL REMARK 350 APPLY THE FOLLOWING TO CHAINS: A REMARK 350 BIOMT1 1 -1.000000 0.000000 0.000000 -7.30860 REMARK 350 BIOMT2 1 0.000000 1.000000 0.000000 19.19050 REMARK 350 BIOMT3 1 0.000000 0.000000 -1.000000 62.21519 REMARK 350 APPLY THE FOLLOWING TO CHAINS: B REMARK 350 BIOMT1 2 1.000000 0.000000 0.000000 0.00000 REMARK 350 BIOMT2 2 0.000000 1.000000 0.000000 0.00000 REMARK 350 BIOMT3 2 0.000000 0.000000 1.000000 0.00000 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 GLY A -2 REMARK 465 SER A -1 REMARK 465 HIS A 0 REMARK 465 MET A 1 REMARK 465 THR A 2 REMARK 465 VAL A 3 REMARK 465 ALA A 4 REMARK 465 THR A 5 REMARK 465 ASP A 6 REMARK 465 ASN A 7 REMARK 465 ASN A 8 REMARK 465 PRO A 9 REMARK 465 THR A 10 REMARK 465 PRO A 11 REMARK 465 GLU A 12 REMARK 465 ALA A 13 REMARK 465 VAL A 14 REMARK 465 THR A 76 REMARK 465 LEU A 77 REMARK 465 LYS A 78 REMARK 465 GLY B -2 REMARK 465 SER B -1 REMARK 465 HIS B 0 REMARK 465 MET B 1 REMARK 465 THR B 2 REMARK 465 VAL B 3 REMARK 465 ALA B 4 REMARK 465 THR B 76 REMARK 465 LEU B 77 REMARK 465 LYS B 78 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 NI NI A 78 O HOH A 109 1.60 REMARK 500 NI NI A 78 O HOH A 108 1.65 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 ASP A 16 55.55 -97.46 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 NI A 78 NI REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HIS A 36 NE2 REMARK 620 2 HOH A 117 O 175.5 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 NI A 78 DBREF 3CSX A 1 78 UNP A1KYE3 A1KYE3_CYAA5 1 78 DBREF 3CSX B 1 78 UNP A1KYE3 A1KYE3_CYAA5 1 78 SEQADV 3CSX GLY A -2 UNP A1KYE3 EXPRESSION TAG SEQADV 3CSX SER A -1 UNP A1KYE3 EXPRESSION TAG SEQADV 3CSX HIS A 0 UNP A1KYE3 EXPRESSION TAG SEQADV 3CSX GLY B -2 UNP A1KYE3 EXPRESSION TAG SEQADV 3CSX SER B -1 UNP A1KYE3 EXPRESSION TAG SEQADV 3CSX HIS B 0 UNP A1KYE3 EXPRESSION TAG SEQRES 1 A 81 GLY SER HIS MET THR VAL ALA THR ASP ASN ASN PRO THR SEQRES 2 A 81 PRO GLU ALA VAL ALA ASP LEU LYS LYS LYS VAL ARG LYS SEQRES 3 A 81 LEU ASN SER LYS ALA GLY GLN MET LYS MET ASP LEU HIS SEQRES 4 A 81 ASP LEU ALA GLU GLY LEU PRO THR ASP TYR GLU ASN LEU SEQRES 5 A 81 VAL GLU THR ALA GLU LYS THR TYR GLU ILE PHE ARG GLU SEQRES 6 A 81 LEU ASP GLN LEU LYS LYS LYS LEU ASN ILE TRP GLU GLU SEQRES 7 A 81 THR LEU LYS SEQRES 1 B 81 GLY SER HIS MET THR VAL ALA THR ASP ASN ASN PRO THR SEQRES 2 B 81 PRO GLU ALA VAL ALA ASP LEU LYS LYS LYS VAL ARG LYS SEQRES 3 B 81 LEU ASN SER LYS ALA GLY GLN MET LYS MET ASP LEU HIS SEQRES 4 B 81 ASP LEU ALA GLU GLY LEU PRO THR ASP TYR GLU ASN LEU SEQRES 5 B 81 VAL GLU THR ALA GLU LYS THR TYR GLU ILE PHE ARG GLU SEQRES 6 B 81 LEU ASP GLN LEU LYS LYS LYS LEU ASN ILE TRP GLU GLU SEQRES 7 B 81 THR LEU LYS HET NI A 78 1 HETNAM NI NICKEL (II) ION FORMUL 3 NI NI 2+ FORMUL 4 HOH *96(H2 O) HELIX 1 1 ASP A 16 LEU A 42 1 27 HELIX 2 2 ASP A 45 GLU A 47 5 3 HELIX 3 3 ASN A 48 GLU A 75 1 28 HELIX 4 4 THR B 10 LEU B 42 1 33 HELIX 5 5 ASP B 45 GLU B 47 5 3 HELIX 6 6 ASN B 48 GLU B 75 1 28 LINK NE2 HIS A 36 NI NI A 78 1555 1555 2.11 LINK NI NI A 78 O HOH A 117 1555 1555 2.02 CISPEP 1 ALA A 15 ASP A 16 0 -16.34 CISPEP 2 LEU A 42 PRO A 43 0 8.78 CISPEP 3 LEU B 42 PRO B 43 0 10.25 SITE 1 AC1 1 HIS A 36 CRYST1 29.436 38.381 62.643 90.00 96.70 90.00 P 1 21 1 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 0.033972 0.000000 0.003988 0.00000 SCALE2 0.000000 0.026055 0.000000 0.00000 SCALE3 0.000000 0.000000 0.016073 0.00000