1AG9 - Header Asymmetric Unit

HEADER ELECTRON TRANSPORT 04-APR-97 1AG9

TITLE FLAVODOXINS THAT ARE REQUIRED FOR ENZYME ACTIVATION: THE TITLE 2 STRUCTURE OF OXIDIZED FLAVODOXIN FROM ESCHERICHIA COLI AT TITLE 3 1.8 ANGSTROMS RESOLUTION.

COMPND MOL_ID: 1; COMPND 2 MOLECULE: FLAVODOXIN; COMPND 3 CHAIN: A, B; COMPND 4 ENGINEERED: YES

SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI; SOURCE 3 ORGANISM_TAXID: 562; SOURCE 4 STRAIN: DHALPHA; SOURCE 5 CELLULAR_LOCATION: CYTOPLASM; SOURCE 6 GENE: FLDA; SOURCE 7 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 8 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 9 EXPRESSION_SYSTEM_PLASMID: PDH01

KEYWDS ELECTRON TRANSPORT, REDUCTIVE ACTIVATION, FLAVODOXIN, KEYWDS 2 ESCHERICHIA COLI

EXPDTA X-RAY DIFFRACTION

AUTHOR D.M.HOOVER,M.L.LUDWIG

REVDAT 2 24-FEB-09 1AG9 1 VERSN REVDAT 1 24-DEC-97 1AG9 0

JRNL AUTH D.M.HOOVER,M.L.LUDWIG JRNL TITL A FLAVODOXIN THAT IS REQUIRED FOR ENZYME JRNL TITL 2 ACTIVATION: THE STRUCTURE OF OXIDIZED FLAVODOXIN JRNL TITL 3 FROM ESCHERICHIA COLI AT 1.8 A RESOLUTION. JRNL REF PROTEIN SCI. V. 6 2525 1997 JRNL REFN ISSN 0961-8368 JRNL PMID 9416602

REMARK 1

REMARK 2 REMARK 2 RESOLUTION. 1.80 ANGSTROMS.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR 3.1 REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.80 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 10.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 100000.000 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0010 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 95.7 REMARK 3 NUMBER OF REFLECTIONS : 32072 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : A POSTERIORI REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 R VALUE (WORKING SET) : 0.196 REMARK 3 FREE R VALUE : 0.250 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 9.990 REMARK 3 FREE R VALUE TEST SET COUNT : 3203 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : 0.004 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 8 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 1.80 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.88 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 88.93 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 3266 REMARK 3 BIN R VALUE (WORKING SET) : 0.2610 REMARK 3 BIN FREE R VALUE : 0.2960 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 10.70 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 391 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.015 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2770 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 100 REMARK 3 SOLVENT ATOMS : 354 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 15.70 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 25.00 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 3.88650 REMARK 3 B22 (A**2) : 0.43940 REMARK 3 B33 (A**2) : 3.44710 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 COORDINATE ERROR. REMARK 3 ESD FROM LUZZATI PLOT (A) : 0.22 REMARK 3 ESD FROM SIGMAA (A) : 0.21 REMARK 3 LOW RESOLUTION CUTOFF (A) : 10.00 REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : 0.26 REMARK 3 ESD FROM C-V SIGMAA (A) : 0.19 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.009 REMARK 3 BOND ANGLES (DEGREES) : 1.50 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 23.80 REMARK 3 IMPROPER ANGLES (DEGREES) : 1.28 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) : 2.650 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 3.440 ; 2.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 2.990 ; 2.000 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 13.790; 2.500 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 : PARHCSDX.PRO REMARK 3 PARAMETER FILE 2 : NULL REMARK 3 PARAMETER FILE 3 : NULL REMARK 3 TOPOLOGY FILE 1 : TOPH19X.PRO REMARK 3 TOPOLOGY FILE 2 : NULL REMARK 3 TOPOLOGY FILE 3 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: RESIDUES 170 - 176 ARE PARTIALLY REMARK 3 DISORDERED AND WERE MODELED USING INFORMATION FROM A DIFFERENT REMARK 3 CRYSTAL FORM OF A HIS-TAGGED MUTANT.

REMARK 4 REMARK 4 1AG9 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 : DEC-94 REMARK 200 TEMPERATURE (KELVIN) : 140 REMARK 200 PH : 7.0 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : N REMARK 200 RADIATION SOURCE : ROTATING ANODE REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : RIGAKU RUH2R REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.5418 REMARK 200 MONOCHROMATOR : GRAPHITE(002) REMARK 200 OPTICS : COLLIMATOR REMARK 200 REMARK 200 DETECTOR TYPE : AREA DETECTOR REMARK 200 DETECTOR MANUFACTURER : XUONG-HAMLIN MULTIWIRE REMARK 200 INTENSITY-INTEGRATION SOFTWARE : SDMS REMARK 200 DATA SCALING SOFTWARE : SDMS REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 32752 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.800 REMARK 200 RESOLUTION RANGE LOW (A) : 35.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 97.1 REMARK 200 DATA REDUNDANCY : 6.600 REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : 0.07200 REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 26.3000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.80 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.88 REMARK 200 COMPLETENESS FOR SHELL (%) : 93.4 REMARK 200 DATA REDUNDANCY IN SHELL : 3.80 REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : 0.16600 REMARK 200 <I/SIGMA(I)> FOR SHELL : 5.900 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: NULL REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: X-PLOR 3.1 REMARK 200 STARTING MODEL: PDB ENTRY 1OFV REMARK 200 REMARK 200 REMARK: NULL

REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 44.10 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.20 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PROTEIN WAS CRYSTALLIZED BY REMARK 280 MICROSEEDING IN 40% MPD, 100 MM CACL2, 20 MM BIS-TRIS, 10 MM REMARK 280 IMIDAZOLE, PH 7.0, 295 K.

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 63.20000 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 34.07500 REMARK 290 SMTRY1 3 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 20.55000 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 34.07500 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 63.20000 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 20.55000 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: 4210 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 14850 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -117.0 KCAL/MOL 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 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 GLU A 92 -61.59 -90.64 REMARK 500 ASN A 175 48.58 -170.85 REMARK 500 HIS B 169 42.19 70.05 REMARK 500 ASN B 175 74.89 -153.90 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 473 DISTANCE = 6.10 ANGSTROMS REMARK 525 HOH A 534 DISTANCE = 5.99 ANGSTROMS REMARK 525 HOH A 568 DISTANCE = 5.46 ANGSTROMS

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 CA A 200 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 TYR A 59 O REMARK 620 2 ASP B 67 OD2 165.5 REMARK 620 3 GLU A 61 OE2 94.6 71.0 REMARK 620 4 HOH A 406 O 83.6 93.0 83.2 REMARK 620 5 HOH A 407 O 86.3 95.8 94.0 169.3 REMARK 620 6 HOH B1001 O 94.6 98.2 155.4 75.3 109.3 REMARK 620 N 1 2 3 4 5 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA B1000 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 TYR B 59 O REMARK 620 2 HOH B1003 O 84.1 REMARK 620 3 HOH B1002 O 91.9 170.7 REMARK 620 4 HOH A 408 O 96.3 108.9 79.8 REMARK 620 5 GLU B 61 OE2 95.5 89.0 83.1 159.5 REMARK 620 6 ASP A 67 OD2 168.3 93.5 88.7 95.3 72.9 REMARK 620 N 1 2 3 4 5 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA A 350 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 BTB A 351 O3 REMARK 620 2 BTB A 351 O4 72.6 REMARK 620 3 HOH A 411 O 72.6 113.2 REMARK 620 4 HOH A 409 O 122.4 75.1 78.3 REMARK 620 5 BTB A 351 O6 78.8 131.8 93.4 152.2 REMARK 620 6 BTB A 351 N 67.9 66.5 138.5 134.7 67.1 REMARK 620 7 BTB A 351 O8 130.1 79.5 157.2 87.4 91.0 63.2 REMARK 620 8 HOH A 410 O 141.4 144.6 79.5 75.6 76.9 126.4 79.8 REMARK 620 N 1 2 3 4 5 6 7 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 NA A 400 NA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HOH A 474 O REMARK 620 2 HOH B1116 O 80.4 REMARK 620 3 GLU A 61 OE1 69.4 99.4 REMARK 620 4 GLU A 61 OE2 92.8 150.9 52.1 REMARK 620 5 HOH A 512 O 136.5 82.1 74.7 83.8 REMARK 620 6 HOH B1129 O 146.7 96.9 142.9 103.8 74.9 REMARK 620 7 ASP B 67 OD1 68.0 94.2 132.1 109.6 153.1 79.2 REMARK 620 8 ASP B 67 OD2 87.1 139.6 111.8 67.3 129.6 73.5 45.8 REMARK 620 N 1 2 3 4 5 6 7 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 NA A 401 NA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLU B 61 OE2 REMARK 620 2 HOH A 484 O 108.3 REMARK 620 3 GLU B 61 OE1 51.9 150.5 REMARK 620 4 HOH B1052 O 89.5 144.5 63.8 REMARK 620 5 HOH B1074 O 74.3 80.1 73.6 135.0 REMARK 620 6 HOH B1151 O 150.5 89.1 101.9 89.4 85.8 REMARK 620 7 ASP A 67 OD1 112.6 73.1 131.8 71.7 153.2 95.0 REMARK 620 8 ASP A 67 OD2 71.5 69.2 114.7 88.9 122.8 138.0 45.2 REMARK 620 N 1 2 3 4 5 6 7 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 CA B 300 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HOH B1004 O REMARK 620 2 BTB B 301 O4 106.4 REMARK 620 3 BTB B 301 O3 65.5 72.8 REMARK 620 4 HOH B1005 O 76.7 151.3 130.8 REMARK 620 5 BTB B 301 O8 161.2 86.7 132.5 85.4 REMARK 620 6 BTB B 301 O6 93.0 135.5 80.2 71.3 86.3 REMARK 620 7 BTB B 301 N 132.6 67.3 68.0 131.8 64.6 70.1 REMARK 620 N 1 2 3 4 5 6 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 NA B 402 NA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HOH B1070 O REMARK 620 2 HOH B1075 O 150.5 REMARK 620 3 HOH B1085 O 136.4 72.3 REMARK 620 4 HOH B1076 O 69.0 81.7 149.2 REMARK 620 5 ASP B 43 OD2 87.6 91.5 81.6 82.9 REMARK 620 6 HOH B1158 O 85.7 87.2 113.1 81.1 164.0 REMARK 620 7 GLU B 96 OE2 78.6 125.9 71.5 139.1 120.8 72.0 REMARK 620 8 ASP B 43 OD1 72.0 128.0 68.5 119.1 50.4 139.4 70.7 REMARK 620 N 1 2 3 4 5 6 7 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 NA B 403 NA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HOH B1152 O REMARK 620 2 HOH B1091 O 69.7 REMARK 620 3 HOH B1167 O 144.4 74.8 REMARK 620 4 HOH B1071 O 85.5 143.6 125.4 REMARK 620 5 ALA B 46 O 95.7 77.9 76.4 78.8 REMARK 620 6 HOH B1156 O 124.3 141.2 84.5 74.8 128.9 REMARK 620 N 1 2 3 4 5

REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: FMA REMARK 800 EVIDENCE_CODE: UNKNOWN REMARK 800 SITE_DESCRIPTION: FMN BINDING SITE. REMARK 800 SITE_IDENTIFIER: FMB REMARK 800 EVIDENCE_CODE: UNKNOWN REMARK 800 SITE_DESCRIPTION: FMN BINDING SITE. REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA A 200 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA B 1000 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA B 300 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA A 350 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CL B 404 REMARK 800 SITE_IDENTIFIER: AC6 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CL A 405 REMARK 800 SITE_IDENTIFIER: AC7 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA A 400 REMARK 800 SITE_IDENTIFIER: AC8 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA A 401 REMARK 800 SITE_IDENTIFIER: AC9 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA B 402 REMARK 800 SITE_IDENTIFIER: BC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA B 403 REMARK 800 SITE_IDENTIFIER: BC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FMN A 177 REMARK 800 SITE_IDENTIFIER: BC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FMN B 177 REMARK 800 SITE_IDENTIFIER: BC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BTB B 301 REMARK 800 SITE_IDENTIFIER: BC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BTB A 351

DBREF 1AG9 A 2 176 UNP P61949 FLAV_ECOLI 1 175 DBREF 1AG9 B 2 176 UNP P61949 FLAV_ECOLI 1 175

SEQRES 1 A 175 ALA ILE THR GLY ILE PHE PHE GLY SER ASP THR GLY ASN SEQRES 2 A 175 THR GLU ASN ILE ALA LYS MET ILE GLN LYS GLN LEU GLY SEQRES 3 A 175 LYS ASP VAL ALA ASP VAL HIS ASP ILE ALA LYS SER SER SEQRES 4 A 175 LYS GLU ASP LEU GLU ALA TYR ASP ILE LEU LEU LEU GLY SEQRES 5 A 175 ILE PRO THR TRP TYR TYR GLY GLU ALA GLN CYS ASP TRP SEQRES 6 A 175 ASP ASP PHE PHE PRO THR LEU GLU GLU ILE ASP PHE ASN SEQRES 7 A 175 GLY LYS LEU VAL ALA LEU PHE GLY CYS GLY ASP GLN GLU SEQRES 8 A 175 ASP TYR ALA GLU TYR PHE CYS ASP ALA LEU GLY THR ILE SEQRES 9 A 175 ARG ASP ILE ILE GLU PRO ARG GLY ALA THR ILE VAL GLY SEQRES 10 A 175 HIS TRP PRO THR ALA GLY TYR HIS PHE GLU ALA SER LYS SEQRES 11 A 175 GLY LEU ALA ASP ASP ASP HIS PHE VAL GLY LEU ALA ILE SEQRES 12 A 175 ASP GLU ASP ARG GLN PRO GLU LEU THR ALA GLU ARG VAL SEQRES 13 A 175 GLU LYS TRP VAL LYS GLN ILE SER GLU GLU LEU HIS LEU SEQRES 14 A 175 ASP GLU ILE LEU ASN ALA SEQRES 1 B 175 ALA ILE THR GLY ILE PHE PHE GLY SER ASP THR GLY ASN SEQRES 2 B 175 THR GLU ASN ILE ALA LYS MET ILE GLN LYS GLN LEU GLY SEQRES 3 B 175 LYS ASP VAL ALA ASP VAL HIS ASP ILE ALA LYS SER SER SEQRES 4 B 175 LYS GLU ASP LEU GLU ALA TYR ASP ILE LEU LEU LEU GLY SEQRES 5 B 175 ILE PRO THR TRP TYR TYR GLY GLU ALA GLN CYS ASP TRP SEQRES 6 B 175 ASP ASP PHE PHE PRO THR LEU GLU GLU ILE ASP PHE ASN SEQRES 7 B 175 GLY LYS LEU VAL ALA LEU PHE GLY CYS GLY ASP GLN GLU SEQRES 8 B 175 ASP TYR ALA GLU TYR PHE CYS ASP ALA LEU GLY THR ILE SEQRES 9 B 175 ARG ASP ILE ILE GLU PRO ARG GLY ALA THR ILE VAL GLY SEQRES 10 B 175 HIS TRP PRO THR ALA GLY TYR HIS PHE GLU ALA SER LYS SEQRES 11 B 175 GLY LEU ALA ASP ASP ASP HIS PHE VAL GLY LEU ALA ILE SEQRES 12 B 175 ASP GLU ASP ARG GLN PRO GLU LEU THR ALA GLU ARG VAL SEQRES 13 B 175 GLU LYS TRP VAL LYS GLN ILE SER GLU GLU LEU HIS LEU SEQRES 14 B 175 ASP GLU ILE LEU ASN ALA

HET CA A 200 1 HET CA B1000 1 HET CA B 300 1 HET CA A 350 1 HET CL B 404 1 HET CL A 405 1 HET NA A 400 1 HET NA A 401 1 HET NA B 402 1 HET NA B 403 1 HET FMN A 177 31 HET FMN B 177 31 HET BTB B 301 14 HET BTB A 351 14

HETNAM CA CALCIUM ION HETNAM CL CHLORIDE ION HETNAM NA SODIUM ION HETNAM FMN FLAVIN MONONUCLEOTIDE HETNAM BTB 2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL- HETNAM 2 BTB PROPANE-1,3-DIOL

HETSYN FMN RIBOFLAVIN MONOPHOSPHATE HETSYN BTB BIS-TRIS BUFFER

FORMUL 3 CA 4(CA 2+) FORMUL 7 CL 2(CL 1-) FORMUL 9 NA 4(NA 1+) FORMUL 13 FMN 2(C17 H21 N4 O9 P) FORMUL 15 BTB 2(C8 H19 N O5) FORMUL 17 HOH *354(H2 O)

HELIX 1 1 ASN A 14 LEU A 26 1 13 HELIX 2 2 ILE A 36 LYS A 38 5 3 HELIX 3 3 LYS A 41 GLU A 45 1 5 HELIX 4 4 CYS A 64 GLU A 75 1 12 HELIX 5 5 ASP A 100 ILE A 109 1 10 HELIX 6 6 PRO A 150 GLU A 167 1 18 HELIX 7 7 LEU A 170 LEU A 174 1 5 HELIX 8 8 ASN B 14 LEU B 26 1 13 HELIX 9 9 ILE B 36 LYS B 38 5 3 HELIX 10 10 LYS B 41 GLU B 45 1 5 HELIX 11 11 CYS B 64 GLU B 75 1 12 HELIX 12 12 ASP B 100 ILE B 109 1 10 HELIX 13 13 PRO B 150 GLU B 167 5 18 HELIX 14 14 LEU B 170 LEU B 174 1 5

SHEET 1 A 5 ALA A 31 ASP A 35 0 SHEET 2 A 5 THR A 4 GLY A 9 1 N THR A 4 O ASP A 32 SHEET 3 A 5 ILE A 49 ILE A 54 1 N ILE A 49 O GLY A 5 SHEET 4 A 5 LEU A 82 PHE A 86 1 N LEU A 82 O LEU A 50 SHEET 5 A 5 THR A 115 VAL A 117 1 N THR A 115 O VAL A 83 SHEET 1 B 2 PHE A 86 CYS A 88 0 SHEET 2 B 2 LEU A 142 ILE A 144 1 N LEU A 142 O GLY A 87 SHEET 1 C 5 ALA B 31 ASP B 35 0 SHEET 2 C 5 THR B 4 PHE B 8 1 N THR B 4 O ASP B 32 SHEET 3 C 5 ILE B 49 GLY B 53 1 N LEU B 51 O GLY B 5 SHEET 4 C 5 LEU B 82 PHE B 86 1 N LEU B 82 O LEU B 50 SHEET 5 C 5 THR B 115 VAL B 117 1 N THR B 115 O VAL B 83 SHEET 1 D 2 PHE B 86 CYS B 88 0 SHEET 2 D 2 LEU B 142 ILE B 144 1 N LEU B 142 O GLY B 87

LINK CA CA A 200 O TYR A 59 1555 1555 2.29 LINK CA CA A 200 OD2 ASP B 67 1555 1555 2.38 LINK CA CA B1000 O TYR B 59 1555 1555 2.29 LINK CA CA A 200 OE2 GLU A 61 1555 1555 2.51 LINK CA CA A 200 O HOH A 406 1555 1555 2.29 LINK CA CA A 200 O HOH A 407 1555 1555 2.20 LINK CA CA A 200 O HOH B1001 1555 1555 2.37 LINK CA CA A 350 O3 BTB A 351 1555 1555 2.37 LINK CA CA A 350 O4 BTB A 351 1555 1555 2.36 LINK CA CA A 350 O HOH A 411 1555 1555 2.39 LINK CA CA A 350 O HOH A 409 1555 1555 2.24 LINK CA CA A 350 O6 BTB A 351 1555 1555 2.38 LINK CA CA A 350 N BTB A 351 1555 1555 2.65 LINK CA CA A 350 O8 BTB A 351 1555 1555 2.39 LINK CA CA A 350 O HOH A 410 1555 1555 2.40 LINK NA NA A 400 O HOH A 474 1555 1555 2.39 LINK NA NA A 400 O HOH B1116 1555 1555 2.36 LINK NA NA A 400 OE1 GLU A 61 1555 1555 2.46 LINK NA NA A 400 OE2 GLU A 61 1555 1555 2.53 LINK NA NA A 400 O HOH A 512 1555 1555 2.60 LINK NA NA A 400 O HOH B1129 1555 1555 2.33 LINK NA NA A 401 OE2 GLU B 61 1555 1555 2.44 LINK NA NA A 401 O HOH A 484 1555 1555 2.44 LINK NA NA A 401 OE1 GLU B 61 1555 1555 2.53 LINK NA NA A 401 O HOH B1052 1555 1555 2.39 LINK NA NA A 401 O HOH B1074 1555 1555 2.45 LINK NA NA A 401 O HOH B1151 1555 1555 2.39 LINK CA CA B 300 O HOH B1004 1555 1555 2.32 LINK CA CA B 300 O4 BTB B 301 1555 1555 2.43 LINK CA CA B 300 O3 BTB B 301 1555 1555 2.49 LINK CA CA B 300 O HOH B1005 1555 1555 2.30 LINK CA CA B 300 O8 BTB B 301 1555 1555 2.49 LINK CA CA B 300 O6 BTB B 301 1555 1555 2.25 LINK CA CA B 300 N BTB B 301 1555 1555 2.56 LINK NA NA B 402 O HOH B1070 1555 1555 2.53 LINK NA NA B 402 O HOH B1075 1555 1555 2.43 LINK NA NA B 402 O HOH B1085 1555 1555 2.33 LINK NA NA B 402 O HOH B1076 1555 1555 2.51 LINK NA NA B 402 OD2 ASP B 43 1555 1555 2.42 LINK NA NA B 402 O HOH B1158 1555 1555 2.41 LINK NA NA B 403 O HOH B1152 1555 1555 2.41 LINK NA NA B 403 O HOH B1091 1555 1555 2.56 LINK NA NA B 403 O HOH B1167 1555 1555 2.43 LINK NA NA B 403 O HOH B1071 1555 1555 2.51 LINK NA NA B 403 O ALA B 46 1555 1555 2.41 LINK CA CA B1000 O HOH B1003 1555 1555 2.29 LINK CA CA B1000 O HOH B1002 1555 1555 2.31 LINK CA CA B1000 O HOH A 408 1555 1555 2.27 LINK CA CA B1000 OE2 GLU B 61 1555 1555 2.70 LINK CA CA B1000 OD2 ASP A 67 1555 1555 2.47 LINK NA NA B 402 OE2 GLU B 96 1555 1565 2.53 LINK NA NA B 403 O HOH B1156 1555 1565 2.36 LINK OD1 ASP A 67 NA NA A 401 1555 1555 2.88 LINK OD2 ASP A 67 NA NA A 401 1555 1555 2.80 LINK OD1 ASP B 43 NA NA B 402 1555 1555 2.67 LINK OD1 ASP B 67 NA NA A 400 1555 1555 2.90 LINK OD2 ASP B 67 NA NA A 400 1555 1555 2.61

SITE 1 FMA 1 FMN A 177 SITE 1 FMB 1 FMN B 177 SITE 1 AC1 6 TYR A 59 GLU A 61 HOH A 406 HOH A 407 SITE 2 AC1 6 ASP B 67 HOH B1001 SITE 1 AC2 6 ASP A 67 HOH A 408 TYR B 59 GLU B 61 SITE 2 AC2 6 HOH B1002 HOH B1003 SITE 1 AC3 3 BTB B 301 HOH B1004 HOH B1005 SITE 1 AC4 4 BTB A 351 HOH A 409 HOH A 410 HOH A 411 SITE 1 AC5 4 HOH A 474 ALA B 62 HOH B1053 HOH B1073 SITE 1 AC6 4 ALA A 62 HOH A 422 HOH A 512 HOH A 538 SITE 1 AC7 6 GLU A 61 HOH A 474 HOH A 512 ASP B 67 SITE 2 AC7 6 HOH B1116 HOH B1129 SITE 1 AC8 6 ASP A 67 HOH A 484 GLU B 61 HOH B1052 SITE 2 AC8 6 HOH B1074 HOH B1151 SITE 1 AC9 7 ASP B 43 GLU B 96 HOH B1070 HOH B1075 SITE 2 AC9 7 HOH B1076 HOH B1085 HOH B1158 SITE 1 BC1 6 ALA B 46 HOH B1071 HOH B1091 HOH B1152 SITE 2 BC1 6 HOH B1156 HOH B1167 SITE 1 BC2 22 SER A 10 ASP A 11 THR A 12 GLY A 13 SITE 2 BC2 22 ASN A 14 THR A 15 PRO A 55 THR A 56 SITE 3 BC2 22 TRP A 57 TYR A 58 TYR A 59 GLY A 60 SITE 4 BC2 22 CYS A 88 GLY A 89 ASP A 90 TYR A 94 SITE 5 BC2 22 TYR A 97 PHE A 98 CYS A 99 ASP A 147 SITE 6 BC2 22 HOH A 440 HOH A 446 SITE 1 BC3 22 SER B 10 ASP B 11 THR B 12 GLY B 13 SITE 2 BC3 22 ASN B 14 THR B 15 PRO B 55 THR B 56 SITE 3 BC3 22 TRP B 57 TYR B 58 TYR B 59 GLY B 60 SITE 4 BC3 22 CYS B 88 GLY B 89 ASP B 90 TYR B 94 SITE 5 BC3 22 TYR B 97 PHE B 98 CYS B 99 ASP B 147 SITE 6 BC3 22 HOH B1006 HOH B1028 SITE 1 BC4 6 ARG B 148 GLU B 151 CA B 300 HOH B1004 SITE 2 BC4 6 HOH B1005 HOH B1162 SITE 1 BC5 14 ASN A 17 GLU A 146 CA A 350 HOH A 409 SITE 2 BC5 14 HOH A 410 HOH A 411 HOH A 471 HOH A 475 SITE 3 BC5 14 SER B 10 ASP B 11 GLY B 13 GLU B 16 SITE 4 BC5 14 HOH B1032 HOH B1041

CRYST1 126.400 41.100 68.150 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 0.007911 0.000000 0.000000 0.00000

SCALE2 0.000000 0.024331 0.000000 0.00000

SCALE3 0.000000 0.000000 0.014674 0.00000

MTRIX1 1 -0.814775 -0.137628 -0.563206 3.35420 1

MTRIX2 1 -0.071841 -0.939965 0.333624 107.85820 1

MTRIX3 1 -0.575310 0.312290 0.755972 -17.84600 1