2RTF - Header Asymmetric Unit

HEADER BIOTIN-BINDING PROTEIN 11-SEP-97 2RTF

TITLE STREPTAVIDIN-BIOTIN COMPLEX, PH 2.00, SPACE GROUP I222

COMPND MOL_ID: 1; COMPND 2 MOLECULE: STREPTAVIDIN; COMPND 3 CHAIN: B, D

SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: STREPTOMYCES AVIDINII; SOURCE 3 ORGANISM_TAXID: 1895

KEYWDS BIOTIN-BINDING PROTEIN, STREPTAVIDIN-BIOTIN, PH 2.00

EXPDTA X-RAY DIFFRACTION

AUTHOR B.A.KATZ

REVDAT 3 24-FEB-09 2RTF 1 VERSN REVDAT 2 27-JAN-99 2RTF 3 ATOM HET COMPND REMARK REVDAT 2 2 3 HETATM KEYWDS HEADER TER REVDAT 2 3 3 CONECT REVDAT 1 14-OCT-98 2RTF 0

JRNL AUTH B.A.KATZ JRNL TITL BINDING OF BIOTIN TO STREPTAVIDIN STABILIZES JRNL TITL 2 INTERSUBUNIT SALT BRIDGES BETWEEN ASP61 AND HIS87 JRNL TITL 3 AT LOW PH. JRNL REF J.MOL.BIOL. V. 274 776 1997 JRNL REFN ISSN 0022-2836 JRNL PMID 9405158 JRNL DOI 10.1006/JMBI.1997.1444

REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH B.A.KATZ,R.T.CASS REMARK 1 TITL IN CRYSTALS OF COMPLEXES OF STREPTAVIDIN WITH REMARK 1 TITL 2 PEPTIDE LIGANDS CONTAINING THE HPQ SEQUENCE THE REMARK 1 TITL 3 PKA OF THE PEPTIDE HISTIDINE IS LESS THAN 3.0 REMARK 1 REF J.BIOL.CHEM. V. 272 13220 1997 REMARK 1 REFN ISSN 0021-9258 REMARK 1 REFERENCE 2 REMARK 1 AUTH B.A.KATZ,B.LIU,R.T.CASS REMARK 1 TITL STRUCTURE-BASED DESIGN TOOLS: STRUCTURAL AND REMARK 1 TITL 2 THERMODYNAMIC COMPARISON WITH BIOTIN OF A SMALL REMARK 1 TITL 3 MOLECULE THAT BINDS STREPTAVIDIN WITH MICROMOLAR REMARK 1 TITL 4 AFFINITY REMARK 1 REF J.AM.CHEM.SOC. V. 118 7914 1996 REMARK 1 REFN ISSN 0002-7863 REMARK 1 REFERENCE 3 REMARK 1 AUTH B.A.KATZ REMARK 1 TITL PREPARATION OF A PROTEIN-DIMERIZING LIGAND BY REMARK 1 TITL 2 TOPOCHEMISTRY AND STRUCTURE-BASED DESIGN REMARK 1 REF J.AM.CHEM.SOC. V. 118 2535 1996 REMARK 1 REFN ISSN 0002-7863 REMARK 1 REFERENCE 4 REMARK 1 AUTH B.A.KATZ,R.T.CASS,B.LIU,R.ARZE,N.COLLINS REMARK 1 TITL TOPOCHEMICAL CATALYSIS ACHIEVED BY STRUCTURE-BASED REMARK 1 TITL 2 LIGAND DESIGN REMARK 1 REF J.BIOL.CHEM. V. 270 31210 1995 REMARK 1 REFN ISSN 0021-9258 REMARK 1 REFERENCE 5 REMARK 1 AUTH B.A.KATZ,R.M.STROUD,N.COLLINS,B.LIU,R.ARZE REMARK 1 TITL TOPOCHEMISTRY FOR PREPARING LIGANDS THAT DIMERIZE REMARK 1 TITL 2 RECEPTORS REMARK 1 REF CHEM.BIOL. V. 2 591 1995 REMARK 1 REFN ISSN 1074-5521 REMARK 1 REFERENCE 6 REMARK 1 AUTH B.A.KATZ REMARK 1 TITL BINDING TO PROTEIN TARGETS OF PEPTIDIC LEADS REMARK 1 TITL 2 DISCOVERED BY PHAGE DISPLAY: CRYSTAL STRUCTURES OF REMARK 1 TITL 3 STREPTAVIDIN-BOUND LINEAR AND CYCLIC PEPTIDE REMARK 1 TITL 4 LIGANDS CONTAINING THE HPQ SEQUENCE REMARK 1 REF BIOCHEMISTRY V. 34 15421 1995 REMARK 1 REFN ISSN 0006-2960 REMARK 1 REFERENCE 7 REMARK 1 AUTH B.A.KATZ,C.R.JOHNSON,R.T.CASS REMARK 1 TITL STRUCTURE-BASED DESIGN OF HIGH AFFINITY REMARK 1 TITL 2 STREPTAVIDIN BINDING CYCLIC PEPTIDE LIGANDS REMARK 1 TITL 3 CONTAINING THIOETHER CROSS-LINKS REMARK 1 REF J.AM.CHEM.SOC. V. 117 8541 1995 REMARK 1 REFN ISSN 0002-7863

REMARK 2 REMARK 2 RESOLUTION. 1.47 ANGSTROMS.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : X-PLOR REMARK 3 AUTHORS : BRUNGER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.47 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 7.50 REMARK 3 DATA CUTOFF (SIGMA(F)) : 2.500 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : NULL REMARK 3 DATA CUTOFF LOW (ABS(F)) : NULL REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 72.0 REMARK 3 NUMBER OF REFLECTIONS : 32631 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : NULL REMARK 3 R VALUE (WORKING SET) : 0.208 REMARK 3 FREE R VALUE : 0.230 REMARK 3 FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF FREE R VALUE : NULL REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : NULL REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 1.54 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.47 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 39.80 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : NULL REMARK 3 BIN R VALUE (WORKING SET) : NULL REMARK 3 BIN FREE R VALUE : NULL REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 BIN FREE R VALUE TEST SET COUNT : NULL REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : NULL REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 4444 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 62 REMARK 3 SOLVENT ATOMS : 182 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : NULL 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 ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM SIGMAA (A) : NULL REMARK 3 LOW RESOLUTION CUTOFF (A) : NULL REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : NULL REMARK 3 ESD FROM C-V SIGMAA (A) : NULL REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.018 REMARK 3 BOND ANGLES (DEGREES) : 4.20 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 24.30 REMARK 3 IMPROPER ANGLES (DEGREES) : NULL 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) : NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE (A**2) : NULL ; NULL 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 : NULL REMARK 3 TOPOLOGY FILE 1 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: THE FOLLOWING ATOMS HAD WEAK REMARK 3 DENSITY AND OCCUPANCIES WERE REFINED: ALA B 13 GLU B 14 ALA B REMARK 3 15 (EXCEPT C AND O) TYR B 22 (N, HN, CA, HA, CB, HB1, HB2 CG, REMARK 3 CD1, HD1, CD2, HD2, CE1, HE1, CE2, HE2, CZ, OH, HH) GLU B 51 REMARK 3 (CG, HG1, HG2, CD, OE1, OE2) ARG B 53 (NE, HE, CZ, NH1, HH11, REMARK 3 HH12, NH2, HH21, HH22) ARG B 84 (NE, HE, CZ, NH1, HH11, HH12, REMARK 3 NH2, HH21, HH22) GLU B 101 (CG, HG1, HG2, CD, OE1, OE2) ARG B REMARK 3 103 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) GLU B 116 REMARK 3 (CG, HG1, HG2, CD, OE1, OE2) LYS B 134 (CB, HB1, HB2, CG, HG1, REMARK 3 HG2, CD, HD1, HD2, CE, HE1, HE2, NZ, HZ1, HZ2, HZ3) PRO B 135 REMARK 3 ALA D 13 GLU D 14 ALA D 15 (EXCEPT C AND O) ASP D 36 (CG, OD1, REMARK 3 OD2) ARG D 53 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) REMARK 3 ASN D 82 (CG, OD1, ND2, HD21, HD22) TYR D 83 (CG AND OUTWARD) REMARK 3 ARG D 84 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) GLU D REMARK 3 101 (CG, HG1, HG2, CD, OE1, OE2) ARG D 103 (NE, HE, CZ, NH1, REMARK 3 HH11, HH12, NH2, HH21, HH22) GLU D 116 (CG, HG1, HG2, CD, OE1, REMARK 3 OE2) RESIDUES B 60-B 69 AND D 60-D 69 WERE REFINED IN 2 REMARK 3 CONFORMATIONS BECAUSE UPON PROTONATION OF ASP 61 AT LOW PH, REMARK 3 ASP B 61 AND ASP D 61 UNDERGO LARGE SHIFTS IN CONFORMATION AND REMARK 3 CHANGES IN HYDROGEN BONDING. THE LOOPS COMPRISING RESIDUES B REMARK 3 61-B 69 AND D 61-D 69 ALSO UNDERGO CORRESPONDING REMARK 3 CONFORMATIONAL CHANGES. HOWEVER SOME OF THESE RESIDUES ARE REMARK 3 DISORDERED AND NOT VISIBLE IN EITHER CONFORMATION. TYR B 22 IS REMARK 3 DISORDERED BETWEEN 2 CONFORMATIONS ONE OF WHICH OCCUPIES A REMARK 3 SIMILAR REGION OF SPACE AS A 2-FOLD RELATED B 22. PROPER REMARK 3 REFINEMENT WITH XPLOR IS NOT POSSIBLE BECAUSE OF THE OVERLAP REMARK 3 OF ONE CONFORMER WITH THE SYMMETRY RELATED COUNTERPART. THE REMARK 3 FOLLOWING WATERS WERE USED TO ACCOUNT FOR DENSITY DUE TO THIS REMARK 3 CONFORMER OF TYR B 22: HOH 1637, HOH HOH 1777. NO HYDROGENS REMARK 3 ARE INCLUDED FOR THESE "WATERS".

REMARK 4 REMARK 4 2RTF 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 : 2.0 REMARK 200 NUMBER OF CRYSTALS USED : NULL REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : N REMARK 200 RADIATION SOURCE : NULL REMARK 200 BEAMLINE : NULL REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.5418 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : RIGAKU RAXIS IV REMARK 200 INTENSITY-INTEGRATION SOFTWARE : BIOTEX (MSC) REMARK 200 DATA SCALING SOFTWARE : NULL REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 48353 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 : 4.200 REMARK 200 R MERGE (I) : 0.08700 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) : 1.47 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.54 REMARK 200 COMPLETENESS FOR SHELL (%) : 39.8 REMARK 200 DATA REDUNDANCY IN SHELL : 4.20 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: X-PLOR REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: REJECTION CRITERIA: (I(H)I - <I(H)I>) > [0.30 * (< REMARK 200 GLOBAL I>) + 0.10*I(H)I], WHERE I(H)I IS THE ITH OBSERVATION REMARK 200 OF THE INTENSITY OF REFLECTION H (M.G.ROSSMANN, A.G.W.LESLIE, REMARK 200 S.S.ABDEL-MEGUID, T.TSUKIHARA, J.APPL.CRYST. 12, 570 - 581). REMARK 200 THIS REJECTION CRITERION IS THE DEFAULT OF THE MSC PROGRAM REMARK 200 BIOTEX.

REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 22.10 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.18 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: ROOM TEMPERATURE, PH 2.0. SYNTHETIC REMARK 280 MOTHER LIQUOR OF 75% SATURATED AMMONIUM SULFATE, 25% 1.0 M REMARK 280 SODIUM FORMATE, 0.99 MM BIOTIN, 170 MM 2-IMINOBIOTIN, ADJUSTED REMARK 280 TO PH 2.00.

REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: I 2 2 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,Y,-Z REMARK 290 4555 X,-Y,-Z REMARK 290 5555 X+1/2,Y+1/2,Z+1/2 REMARK 290 6555 -X+1/2,-Y+1/2,Z+1/2 REMARK 290 7555 -X+1/2,Y+1/2,-Z+1/2 REMARK 290 8555 X+1/2,-Y+1/2,-Z+1/2 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 0.00000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 4 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 5 1.000000 0.000000 0.000000 47.56500 REMARK 290 SMTRY2 5 0.000000 1.000000 0.000000 52.51000 REMARK 290 SMTRY3 5 0.000000 0.000000 1.000000 24.77000 REMARK 290 SMTRY1 6 -1.000000 0.000000 0.000000 47.56500 REMARK 290 SMTRY2 6 0.000000 -1.000000 0.000000 52.51000 REMARK 290 SMTRY3 6 0.000000 0.000000 1.000000 24.77000 REMARK 290 SMTRY1 7 -1.000000 0.000000 0.000000 47.56500 REMARK 290 SMTRY2 7 0.000000 1.000000 0.000000 52.51000 REMARK 290 SMTRY3 7 0.000000 0.000000 -1.000000 24.77000 REMARK 290 SMTRY1 8 1.000000 0.000000 0.000000 47.56500 REMARK 290 SMTRY2 8 0.000000 -1.000000 0.000000 52.51000 REMARK 290 SMTRY3 8 0.000000 0.000000 -1.000000 24.77000 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: TETRAMERIC REMARK 350 APPLY THE FOLLOWING TO CHAINS: B, D 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 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 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 B1660 LIES ON A SPECIAL POSITION. REMARK 375 HOH B1777 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 ASP B 1 REMARK 465 PRO B 2 REMARK 465 SER B 3 REMARK 465 LYS B 4 REMARK 465 ASP B 5 REMARK 465 SER B 6 REMARK 465 LYS B 7 REMARK 465 ALA B 8 REMARK 465 GLN B 9 REMARK 465 VAL B 10 REMARK 465 SER B 11 REMARK 465 ALA B 12 REMARK 465 ASP D 1 REMARK 465 PRO D 2 REMARK 465 SER D 3 REMARK 465 LYS D 4 REMARK 465 ASP D 5 REMARK 465 SER D 6 REMARK 465 LYS D 7 REMARK 465 ALA D 8 REMARK 465 GLN D 9 REMARK 465 VAL D 10 REMARK 465 SER D 11 REMARK 465 ALA D 12 REMARK 465 LYS D 134 REMARK 465 PRO D 135

REMARK 475 REMARK 475 ZERO OCCUPANCY RESIDUES REMARK 475 THE FOLLOWING RESIDUES WERE MODELED WITH ZERO OCCUPANCY. REMARK 475 THE LOCATION AND PROPERTIES OF THESE RESIDUES MAY NOT REMARK 475 BE RELIABLE. (M=MODEL NUMBER; RES=RESIDUE NAME; REMARK 475 C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE) REMARK 475 M RES C SSEQI REMARK 475 GLU B 14 REMARK 475 THR B 66

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 ALA B 65 N CA C O CB REMARK 480 ASP B 67 N CA C O CB CG OD1 REMARK 480 ASP B 67 OD2 REMARK 480 SER B 69 N CA C O CB OG REMARK 480 GLU B 116 CG CD OE1 OE2 REMARK 480 LYS B 134 NZ REMARK 480 ASP D 36 CG OD1 OD2 REMARK 480 ALA D 65 N CA C O CB REMARK 480 THR D 66 N CA C O CB OG1 CG2 REMARK 480 GLY D 68 N CA C O REMARK 480 GLU D 101 CG CD OE1 OE2

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 OH TYR B 22 O HOH B 1777 1.62 REMARK 500 CE2 TYR B 22 O HOH B 1637 1.72 REMARK 500 CZ TYR B 22 O HOH B 1777 1.92 REMARK 500 CD2 TYR B 22 O HOH B 1637 1.96 REMARK 500 O HOH B 2189 O HOH B 2191 2.01 REMARK 500 CE2 TYR B 22 O HOH B 1777 2.12 REMARK 500 O HOH B 1637 O HOH B 1777 2.17 REMARK 500 REMARK 500 REMARK: NULL 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 O HOH B 1637 O HOH B 1637 3655 0.32 REMARK 500 O HOH D 1782 O HOH D 1782 3655 0.34 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 TRP B 21 CG - CD1 - NE1 ANGL. DEV. = -6.9 DEGREES REMARK 500 TRP B 21 CD1 - NE1 - CE2 ANGL. DEV. = 9.0 DEGREES REMARK 500 TRP B 21 NE1 - CE2 - CZ2 ANGL. DEV. = 8.0 DEGREES REMARK 500 TRP B 21 NE1 - CE2 - CD2 ANGL. DEV. = -6.7 DEGREES REMARK 500 ARG B 59 NE - CZ - NH2 ANGL. DEV. = -3.6 DEGREES REMARK 500 TRP B 75 CG - CD1 - NE1 ANGL. DEV. = -7.0 DEGREES REMARK 500 TRP B 75 CD1 - NE1 - CE2 ANGL. DEV. = 8.2 DEGREES REMARK 500 TRP B 75 NE1 - CE2 - CZ2 ANGL. DEV. = 7.8 DEGREES REMARK 500 TRP B 79 CD1 - NE1 - CE2 ANGL. DEV. = 7.5 DEGREES REMARK 500 TRP B 79 NE1 - CE2 - CZ2 ANGL. DEV. = 7.1 DEGREES REMARK 500 TRP B 92 CG - CD1 - NE1 ANGL. DEV. = -7.0 DEGREES REMARK 500 TRP B 92 CD1 - NE1 - CE2 ANGL. DEV. = 8.9 DEGREES REMARK 500 TRP B 108 CG - CD1 - NE1 ANGL. DEV. = -7.3 DEGREES REMARK 500 TRP B 108 CD1 - NE1 - CE2 ANGL. DEV. = 8.2 DEGREES REMARK 500 TRP B 120 CG - CD1 - NE1 ANGL. DEV. = -6.8 DEGREES REMARK 500 TRP B 120 CD1 - NE1 - CE2 ANGL. DEV. = 8.7 DEGREES REMARK 500 TRP B 120 NE1 - CE2 - CZ2 ANGL. DEV. = 7.0 DEGREES REMARK 500 TRP D 21 CG - CD1 - NE1 ANGL. DEV. = -7.5 DEGREES REMARK 500 TRP D 21 CD1 - NE1 - CE2 ANGL. DEV. = 8.6 DEGREES REMARK 500 TRP D 21 NE1 - CE2 - CZ2 ANGL. DEV. = 8.4 DEGREES REMARK 500 TRP D 21 NE1 - CE2 - CD2 ANGL. DEV. = -6.4 DEGREES REMARK 500 TRP D 75 CG - CD1 - NE1 ANGL. DEV. = -7.7 DEGREES REMARK 500 TRP D 75 CD1 - NE1 - CE2 ANGL. DEV. = 8.9 DEGREES REMARK 500 TRP D 75 NE1 - CE2 - CZ2 ANGL. DEV. = 7.8 DEGREES REMARK 500 TRP D 79 CD1 - NE1 - CE2 ANGL. DEV. = 6.7 DEGREES REMARK 500 TRP D 92 CG - CD1 - NE1 ANGL. DEV. = -7.9 DEGREES REMARK 500 TRP D 92 CD1 - NE1 - CE2 ANGL. DEV. = 9.0 DEGREES REMARK 500 TRP D 92 NE1 - CE2 - CZ2 ANGL. DEV. = 6.9 DEGREES REMARK 500 TRP D 108 CD1 - NE1 - CE2 ANGL. DEV. = 6.8 DEGREES REMARK 500 TRP D 120 CG - CD1 - NE1 ANGL. DEV. = -6.3 DEGREES REMARK 500 TRP D 120 CD1 - NE1 - CE2 ANGL. DEV. = 8.1 DEGREES REMARK 500 TRP D 120 NE1 - CE2 - CZ2 ANGL. DEV. = 7.2 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 SER B 52 -161.88 73.92 REMARK 500 SER B 62 105.30 -49.92 REMARK 500 PRO B 64 74.51 -41.10 REMARK 500 ALA B 65 56.52 -115.25 REMARK 500 GLU D 14 -176.53 -61.00 REMARK 500 ALA D 15 -96.76 132.41 REMARK 500 SER D 52 -160.18 71.80 REMARK 500 ALA D 65 58.72 -144.31 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 ALA B 63 PRO B 64 128.79 REMARK 500 ALA D 63 PRO D 64 148.51 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: PLANAR GROUPS REMARK 500 REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS REMARK 500 AN RMSD GREATER THAN THIS VALUE REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 M RES CSSEQI RMS TYPE REMARK 500 ARG B 103 0.14 SIDE_CHAIN REMARK 500 ARG D 53 0.08 SIDE_CHAIN REMARK 500 ARG D 84 0.21 SIDE_CHAIN REMARK 500 ARG D 103 0.14 SIDE_CHAIN 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 D 492 DISTANCE = 7.30 ANGSTROMS REMARK 525 HOH B 534 DISTANCE = 6.68 ANGSTROMS REMARK 525 HOH D 503 DISTANCE = 9.94 ANGSTROMS REMARK 525 HOH D 527 DISTANCE = 6.93 ANGSTROMS REMARK 525 HOH B1000 DISTANCE = 9.56 ANGSTROMS REMARK 525 HOH B1077 DISTANCE = 12.21 ANGSTROMS REMARK 525 HOH B1082 DISTANCE = 5.29 ANGSTROMS REMARK 525 HOH B1104 DISTANCE = 6.68 ANGSTROMS REMARK 525 HOH B1471 DISTANCE = 5.91 ANGSTROMS REMARK 525 HOH D 952 DISTANCE = 16.39 ANGSTROMS REMARK 525 HOH D 968 DISTANCE = 16.42 ANGSTROMS REMARK 525 HOH D1071 DISTANCE = 6.95 ANGSTROMS REMARK 525 HOH B1575 DISTANCE = 12.11 ANGSTROMS REMARK 525 HOH D1236 DISTANCE = 11.86 ANGSTROMS REMARK 525 HOH B1605 DISTANCE = 9.60 ANGSTROMS REMARK 525 HOH D1343 DISTANCE = 10.89 ANGSTROMS REMARK 525 HOH B1654 DISTANCE = 8.60 ANGSTROMS REMARK 525 HOH B1658 DISTANCE = 6.71 ANGSTROMS REMARK 525 HOH D1493 DISTANCE = 17.15 ANGSTROMS REMARK 525 HOH B1671 DISTANCE = 16.20 ANGSTROMS REMARK 525 HOH D1565 DISTANCE = 10.78 ANGSTROMS REMARK 525 HOH B1800 DISTANCE = 6.52 ANGSTROMS REMARK 525 HOH B1811 DISTANCE = 11.98 ANGSTROMS REMARK 525 HOH B1903 DISTANCE = 10.41 ANGSTROMS REMARK 525 HOH D1728 DISTANCE = 8.22 ANGSTROMS REMARK 525 HOH B2059 DISTANCE = 7.91 ANGSTROMS REMARK 525 HOH D1780 DISTANCE = 25.24 ANGSTROMS REMARK 525 HOH D1782 DISTANCE = 16.13 ANGSTROMS REMARK 525 HOH D1786 DISTANCE = 7.21 ANGSTROMS REMARK 525 HOH D1809 DISTANCE = 7.77 ANGSTROMS REMARK 525 HOH B2188 DISTANCE = 13.40 ANGSTROMS REMARK 525 HOH B2189 DISTANCE = 11.39 ANGSTROMS REMARK 525 HOH D1929 DISTANCE = 8.14 ANGSTROMS REMARK 525 HOH B2190 DISTANCE = 12.59 ANGSTROMS REMARK 525 HOH D1943 DISTANCE = 7.39 ANGSTROMS REMARK 525 HOH B2191 DISTANCE = 11.14 ANGSTROMS REMARK 525 HOH D1965 DISTANCE = 7.49 ANGSTROMS REMARK 525 HOH D2075 DISTANCE = 6.47 ANGSTROMS REMARK 525 HOH D2207 DISTANCE = 7.90 ANGSTROMS REMARK 525 HOH D2208 DISTANCE = 10.87 ANGSTROMS REMARK 525 HOH D2212 DISTANCE = 10.27 ANGSTROMS REMARK 525 HOH D2249 DISTANCE = 9.52 ANGSTROMS REMARK 525 HOH D2251 DISTANCE = 5.72 ANGSTROMS

REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 D 300 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BTN B 300 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BTN D 301

DBREF 2RTF B 1 135 UNP P22629 SAV_STRAV 25 159 DBREF 2RTF D 1 135 UNP P22629 SAV_STRAV 25 159

SEQRES 1 B 135 ASP PRO SER LYS ASP SER LYS ALA GLN VAL SER ALA ALA SEQRES 2 B 135 GLU ALA GLY ILE THR GLY THR TRP TYR ASN GLN LEU GLY SEQRES 3 B 135 SER THR PHE ILE VAL THR ALA GLY ALA ASP GLY ALA LEU SEQRES 4 B 135 THR GLY THR TYR GLU SER ALA VAL GLY ASN ALA GLU SER SEQRES 5 B 135 ARG TYR VAL LEU THR GLY ARG TYR ASP SER ALA PRO ALA SEQRES 6 B 135 THR ASP GLY SER GLY THR ALA LEU GLY TRP THR VAL ALA SEQRES 7 B 135 TRP LYS ASN ASN TYR ARG ASN ALA HIS SER ALA THR THR SEQRES 8 B 135 TRP SER GLY GLN TYR VAL GLY GLY ALA GLU ALA ARG ILE SEQRES 9 B 135 ASN THR GLN TRP LEU LEU THR SER GLY THR THR GLU ALA SEQRES 10 B 135 ASN ALA TRP LYS SER THR LEU VAL GLY HIS ASP THR PHE SEQRES 11 B 135 THR LYS VAL LYS PRO SEQRES 1 D 135 ASP PRO SER LYS ASP SER LYS ALA GLN VAL SER ALA ALA SEQRES 2 D 135 GLU ALA GLY ILE THR GLY THR TRP TYR ASN GLN LEU GLY SEQRES 3 D 135 SER THR PHE ILE VAL THR ALA GLY ALA ASP GLY ALA LEU SEQRES 4 D 135 THR GLY THR TYR GLU SER ALA VAL GLY ASN ALA GLU SER SEQRES 5 D 135 ARG TYR VAL LEU THR GLY ARG TYR ASP SER ALA PRO ALA SEQRES 6 D 135 THR ASP GLY SER GLY THR ALA LEU GLY TRP THR VAL ALA SEQRES 7 D 135 TRP LYS ASN ASN TYR ARG ASN ALA HIS SER ALA THR THR SEQRES 8 D 135 TRP SER GLY GLN TYR VAL GLY GLY ALA GLU ALA ARG ILE SEQRES 9 D 135 ASN THR GLN TRP LEU LEU THR SER GLY THR THR GLU ALA SEQRES 10 D 135 ASN ALA TRP LYS SER THR LEU VAL GLY HIS ASP THR PHE SEQRES 11 D 135 THR LYS VAL LYS PRO

HET SO4 D 300 5 HET BTN B 300 31 HET BTN D 301 31

HETNAM SO4 SULFATE ION HETNAM BTN BIOTIN

FORMUL 3 SO4 O4 S 2- FORMUL 4 BTN 2(C10 H16 N2 O3 S) FORMUL 6 HOH *181(H2 O)

HELIX 1 1 GLU B 14 ILE B 17 1 4 HELIX 2 2 ALA B 119 LYS B 121 5 3 HELIX 3 3 GLU D 116 LYS D 121 5 6

SHEET 1 A 9 THR B 28 VAL B 31 0 SHEET 2 A 9 GLY B 19 ASN B 23 -1 N TRP B 21 O PHE B 29 SHEET 3 A 9 THR B 123 LYS B 132 -1 N THR B 131 O TYR B 22 SHEET 4 A 9 ARG B 103 SER B 112 -1 N LEU B 110 O LEU B 124 SHEET 5 A 9 SER B 88 VAL B 97 -1 N VAL B 97 O ARG B 103 SHEET 6 A 9 THR B 71 ALA B 78 -1 N VAL B 77 O THR B 90 SHEET 7 A 9 TYR B 54 TYR B 60 -1 N ARG B 59 O GLY B 74 SHEET 8 A 9 ALA B 38 GLU B 44 -1 N TYR B 43 O TYR B 54 SHEET 9 A 9 THR B 28 ALA B 33 -1 N THR B 32 O THR B 40 SHEET 1 B 8 GLY D 19 TYR D 22 0 SHEET 2 B 8 THR D 28 ALA D 33 -1 N VAL D 31 O GLY D 19 SHEET 3 B 8 ALA D 38 GLU D 44 -1 N GLU D 44 O THR D 28 SHEET 4 B 8 TYR D 54 TYR D 60 -1 N GLY D 58 O LEU D 39 SHEET 5 B 8 THR D 71 ALA D 78 -1 N THR D 76 O THR D 57 SHEET 6 B 8 SER D 88 VAL D 97 -1 N TYR D 96 O THR D 71 SHEET 7 B 8 ARG D 103 SER D 112 -1 N THR D 111 O ALA D 89 SHEET 8 B 8 THR D 123 PHE D 130 -1 N PHE D 130 O ILE D 104

CISPEP 1 LYS B 134 PRO B 135 0 29.63

SITE 1 AC1 5 TRP B 120 LYS B 121 VAL D 47 GLY D 48 SITE 2 AC1 5 HOH D1965 SITE 1 AC2 14 ASN B 23 SER B 27 TYR B 43 SER B 45 SITE 2 AC2 14 VAL B 47 GLY B 48 ASN B 49 TRP B 79 SITE 3 AC2 14 SER B 88 THR B 90 TRP B 108 LEU B 110 SITE 4 AC2 14 ASP B 128 TRP D 120 SITE 1 AC3 14 ASN D 23 LEU D 25 SER D 27 TYR D 43 SITE 2 AC3 14 SER D 45 VAL D 47 GLY D 48 ASN D 49 SITE 3 AC3 14 TRP D 79 SER D 88 THR D 90 TRP D 108 SITE 4 AC3 14 ASP D 128 HOH D 503

CRYST1 95.130 105.020 49.540 90.00 90.00 90.00 I 2 2 2 16

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 0.010512 0.000000 0.000000 0.00000

SCALE2 0.000000 0.009522 0.000000 0.00000

SCALE3 0.000000 0.000000 0.020186 0.00000

MTRIX1 1 -0.999337 -0.027113 -0.024286 52.20200 1

MTRIX2 1 -0.036398 0.738057 0.673758 0.78310 1

MTRIX3 1 -0.000343 0.674193 -0.738555 0.76320 1