1MEP - Header Asymmetric Unit

HEADER BIOTIN-BINDING PROTEIN 08-AUG-02 1MEP

TITLE CRYSTAL STRUCTURE OF STREPTAVIDIN DOUBLE MUTANT S45A/D128A TITLE 2 WITH BIOTIN: COOPERATIVE HYDROGEN-BOND INTERACTIONS IN THE TITLE 3 STREPTAVIDIN-BIOTIN SYSTEM.

COMPND MOL_ID: 1; COMPND 2 MOLECULE: STREPTAVIDIN; COMPND 3 CHAIN: A, B, C, D; COMPND 4 FRAGMENT: CORE STREPTAVIDIN (RESIDUES 13-139); COMPND 5 ENGINEERED: YES; COMPND 6 MUTATION: YES

SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: STREPTOMYCES AVIDINII; SOURCE 3 ORGANISM_TAXID: 1895; SOURCE 4 GENE: CORE STREPTAVIDIN; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI BL21; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 511693; SOURCE 7 EXPRESSION_SYSTEM_STRAIN: BL21; SOURCE 8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID

KEYWDS HOMOTETRAMER, BIOTIN-BINDING PROTEIN

EXPDTA X-RAY DIFFRACTION

AUTHOR D.E.HYRE,I.LE TRONG,E.A.MERRITT,R.E.STENKAMP,N.M.GREEN, AUTHOR 2 P.S.STAYTON

REVDAT 3 24-FEB-09 1MEP 1 VERSN REVDAT 2 14-MAR-06 1MEP 1 JRNL REVDAT 1 02-SEP-03 1MEP 0

JRNL AUTH D.E.HYRE,I.LE TRONG,E.A.MERRITT,J.F.ECCLESTON, JRNL AUTH 2 N.M.GREEN,R.E.STENKAMP,P.S.STAYTON JRNL TITL COOPERATIVE HYDROGEN BOND INTERACTIONS IN THE JRNL TITL 2 STREPTAVIDIN-BIOTIN SYSTEM JRNL REF PROTEIN SCI. V. 15 459 2006 JRNL REFN ISSN 0961-8368 JRNL PMID 16452627 JRNL DOI 10.1110/PS.051970306

REMARK 1

REMARK 2 REMARK 2 RESOLUTION. 1.65 ANGSTROMS.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : SHELXL-97 REMARK 3 AUTHORS : G.M.SHELDRICK REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.65 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 10.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 99.6 REMARK 3 CROSS-VALIDATION METHOD : THROUGHOUT 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) : 0.204 REMARK 3 R VALUE (WORKING SET, NO CUTOFF) : 0.201 REMARK 3 FREE R VALUE (NO CUTOFF) : 0.294 REMARK 3 FREE R VALUE TEST SET SIZE (%, NO CUTOFF) : 5.000 REMARK 3 FREE R VALUE TEST SET COUNT (NO CUTOFF) : 2853 REMARK 3 TOTAL NUMBER OF REFLECTIONS (NO CUTOFF) : 57069 REMARK 3 REMARK 3 FIT/AGREEMENT OF MODEL FOR DATA WITH F>4SIG(F). REMARK 3 R VALUE (WORKING + TEST SET, F>4SIG(F)) : 0.176 REMARK 3 R VALUE (WORKING SET, F>4SIG(F)) : 0.173 REMARK 3 FREE R VALUE (F>4SIG(F)) : 0.265 REMARK 3 FREE R VALUE TEST SET SIZE (%, F>4SIG(F)) : 4.900 REMARK 3 FREE R VALUE TEST SET COUNT (F>4SIG(F)) : 2054 REMARK 3 TOTAL NUMBER OF REFLECTIONS (F>4SIG(F)) : 41655 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 3547 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 64 REMARK 3 SOLVENT ATOMS : 293 REMARK 3 REMARK 3 MODEL REFINEMENT. REMARK 3 OCCUPANCY SUM OF NON-HYDROGEN ATOMS : 3881.00 REMARK 3 OCCUPANCY SUM OF HYDROGEN ATOMS : 0.00 REMARK 3 NUMBER OF DISCRETELY DISORDERED RESIDUES : 8 REMARK 3 NUMBER OF LEAST-SQUARES PARAMETERS : 35047 REMARK 3 NUMBER OF RESTRAINTS : 44145 REMARK 3 REMARK 3 RMS DEVIATIONS FROM RESTRAINT TARGET VALUES. REMARK 3 BOND LENGTHS (A) : 0.007 REMARK 3 ANGLE DISTANCES (A) : 0.027 REMARK 3 SIMILAR DISTANCES (NO TARGET VALUES) (A) : 0.000 REMARK 3 DISTANCES FROM RESTRAINT PLANES (A) : 0.031 REMARK 3 ZERO CHIRAL VOLUMES (A**3) : 0.037 REMARK 3 NON-ZERO CHIRAL VOLUMES (A**3) : 0.049 REMARK 3 ANTI-BUMPING DISTANCE RESTRAINTS (A) : 0.010 REMARK 3 RIGID-BOND ADP COMPONENTS (A**2) : 0.002 REMARK 3 SIMILAR ADP COMPONENTS (A**2) : 0.031 REMARK 3 APPROXIMATELY ISOTROPIC ADPS (A**2) : 0.081 REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED: NULL REMARK 3 REMARK 3 STEREOCHEMISTRY TARGET VALUES : ENGH AND HUBER REMARK 3 SPECIAL CASE: NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: ANISOTROPIC REFINEMENT REDUCED FREE REMARK 3 R (NO CUTOFF)

REMARK 4 REMARK 4 1MEP COMPLIES WITH FORMAT V. 3.15, 01-DEC-08

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 15-AUG-02. REMARK 100 THE RCSB ID CODE IS RCSB016857.

REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 01-APR-01 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 6.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : SSRL REMARK 200 BEAMLINE : BL9-1 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.97 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : MARRESEARCH REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 57334 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.650 REMARK 200 RESOLUTION RANGE LOW (A) : 50.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : -3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.6 REMARK 200 DATA REDUNDANCY : NULL REMARK 200 R MERGE (I) : 0.09900 REMARK 200 R SYM (I) : NULL REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 14.8000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.65 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.68 REMARK 200 COMPLETENESS FOR SHELL (%) : 98.5 REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : 0.54200 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : 1.500 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: ISOMORPHOUS REMARK 200 SOFTWARE USED: SHELX REMARK 200 STARTING MODEL: PDB ENTRY 1SWE REMARK 200 REMARK 200 REMARK: NULL

REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 45.61 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.87 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: SODIUM CITRATE, CACODYLATE, PH 6.5, REMARK 280 VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 294K

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 48.92850 REMARK 290 SMTRY3 2 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: TETRAMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 11680 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 17690 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -34.0 KCAL/MOL REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C, 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 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 ALA A 13 REMARK 465 GLU A 14 REMARK 465 ALA A 15 REMARK 465 PRO A 135 REMARK 465 SER A 136 REMARK 465 ALA A 137 REMARK 465 ALA A 138 REMARK 465 SER A 139 REMARK 465 ALA B 13 REMARK 465 GLU B 14 REMARK 465 ALA B 15 REMARK 465 LYS B 134 REMARK 465 PRO B 135 REMARK 465 SER B 136 REMARK 465 ALA B 137 REMARK 465 ALA B 138 REMARK 465 SER B 139 REMARK 465 ALA C 13 REMARK 465 GLU C 14 REMARK 465 ALA C 15 REMARK 465 LYS C 134 REMARK 465 PRO C 135 REMARK 465 SER C 136 REMARK 465 ALA C 137 REMARK 465 ALA C 138 REMARK 465 SER C 139 REMARK 465 ALA D 13 REMARK 465 GLU D 14 REMARK 465 ALA D 15 REMARK 465 LYS D 134 REMARK 465 PRO D 135 REMARK 465 SER D 136 REMARK 465 ALA D 137 REMARK 465 ALA D 138 REMARK 465 SER D 139

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 PHE A 29 CA - CB - CG ANGL. DEV. = 16.3 DEGREES REMARK 500 ARG A 103 NE - CZ - NH1 ANGL. DEV. = 3.6 DEGREES REMARK 500 ARG B 103 NE - CZ - NH1 ANGL. DEV. = -3.0 DEGREES REMARK 500 ARG C 84 NE - CZ - NH1 ANGL. DEV. = 4.7 DEGREES REMARK 500 ARG C 84 NE - CZ - NH2 ANGL. DEV. = -3.6 DEGREES REMARK 500 GLY C 99 C - N - CA ANGL. DEV. = 12.9 DEGREES REMARK 500 VAL D 31 CB - CA - C ANGL. DEV. = -13.5 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 A 52 -163.52 64.31 REMARK 500 GLU A 101 57.63 -119.16 REMARK 500 SER B 52 -155.96 59.99 REMARK 500 ALA B 100 -85.13 -15.48 REMARK 500 SER C 52 -152.08 63.91 REMARK 500 ASP C 67 0.23 -62.80 REMARK 500 ASN C 81 -155.13 -139.90 REMARK 500 ALA C 100 -99.63 -46.33 REMARK 500 SER D 52 -163.82 61.69 REMARK 500 THR D 66 41.43 -101.96 REMARK 500 ASP D 67 -86.48 -114.05 REMARK 500 TRP D 79 49.12 -83.85 REMARK 500 GLU D 101 56.37 -114.68 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 BTN A 5100 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BTN B 5200 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BTN C 5300 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE BTN D 5400

REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1SWE RELATED DB: PDB REMARK 900 STREPTAVIDIN WILDTYPE WITH BIOTIN REMARK 900 RELATED ID: 1MK5 RELATED DB: PDB REMARK 900 WILDTYPE CORE-STREPTAVIDIN WITH BIOTIN AT 1.4A

DBREF 1MEP A 13 139 UNP P22629 SAV_STRAV 37 163 DBREF 1MEP B 13 139 UNP P22629 SAV_STRAV 37 163 DBREF 1MEP C 13 139 UNP P22629 SAV_STRAV 37 163 DBREF 1MEP D 13 139 UNP P22629 SAV_STRAV 37 163

SEQADV 1MEP ALA A 45 UNP P22629 SER 69 ENGINEERED SEQADV 1MEP ALA A 128 UNP P22629 ASP 152 ENGINEERED SEQADV 1MEP ALA B 45 UNP P22629 SER 69 ENGINEERED SEQADV 1MEP ALA B 128 UNP P22629 ASP 152 ENGINEERED SEQADV 1MEP ALA C 45 UNP P22629 SER 69 ENGINEERED SEQADV 1MEP ALA C 128 UNP P22629 ASP 152 ENGINEERED SEQADV 1MEP ALA D 45 UNP P22629 SER 69 ENGINEERED SEQADV 1MEP ALA D 128 UNP P22629 ASP 152 ENGINEERED

SEQRES 1 A 127 ALA GLU ALA GLY ILE THR GLY THR TRP TYR ASN GLN LEU SEQRES 2 A 127 GLY SER THR PHE ILE VAL THR ALA GLY ALA ASP GLY ALA SEQRES 3 A 127 LEU THR GLY THR TYR GLU ALA ALA VAL GLY ASN ALA GLU SEQRES 4 A 127 SER ARG TYR VAL LEU THR GLY ARG TYR ASP SER ALA PRO SEQRES 5 A 127 ALA THR ASP GLY SER GLY THR ALA LEU GLY TRP THR VAL SEQRES 6 A 127 ALA TRP LYS ASN ASN TYR ARG ASN ALA HIS SER ALA THR SEQRES 7 A 127 THR TRP SER GLY GLN TYR VAL GLY GLY ALA GLU ALA ARG SEQRES 8 A 127 ILE ASN THR GLN TRP LEU LEU THR SER GLY THR THR GLU SEQRES 9 A 127 ALA ASN ALA TRP LYS SER THR LEU VAL GLY HIS ALA THR SEQRES 10 A 127 PHE THR LYS VAL LYS PRO SER ALA ALA SER SEQRES 1 B 127 ALA GLU ALA GLY ILE THR GLY THR TRP TYR ASN GLN LEU SEQRES 2 B 127 GLY SER THR PHE ILE VAL THR ALA GLY ALA ASP GLY ALA SEQRES 3 B 127 LEU THR GLY THR TYR GLU ALA ALA VAL GLY ASN ALA GLU SEQRES 4 B 127 SER ARG TYR VAL LEU THR GLY ARG TYR ASP SER ALA PRO SEQRES 5 B 127 ALA THR ASP GLY SER GLY THR ALA LEU GLY TRP THR VAL SEQRES 6 B 127 ALA TRP LYS ASN ASN TYR ARG ASN ALA HIS SER ALA THR SEQRES 7 B 127 THR TRP SER GLY GLN TYR VAL GLY GLY ALA GLU ALA ARG SEQRES 8 B 127 ILE ASN THR GLN TRP LEU LEU THR SER GLY THR THR GLU SEQRES 9 B 127 ALA ASN ALA TRP LYS SER THR LEU VAL GLY HIS ALA THR SEQRES 10 B 127 PHE THR LYS VAL LYS PRO SER ALA ALA SER SEQRES 1 C 127 ALA GLU ALA GLY ILE THR GLY THR TRP TYR ASN GLN LEU SEQRES 2 C 127 GLY SER THR PHE ILE VAL THR ALA GLY ALA ASP GLY ALA SEQRES 3 C 127 LEU THR GLY THR TYR GLU ALA ALA VAL GLY ASN ALA GLU SEQRES 4 C 127 SER ARG TYR VAL LEU THR GLY ARG TYR ASP SER ALA PRO SEQRES 5 C 127 ALA THR ASP GLY SER GLY THR ALA LEU GLY TRP THR VAL SEQRES 6 C 127 ALA TRP LYS ASN ASN TYR ARG ASN ALA HIS SER ALA THR SEQRES 7 C 127 THR TRP SER GLY GLN TYR VAL GLY GLY ALA GLU ALA ARG SEQRES 8 C 127 ILE ASN THR GLN TRP LEU LEU THR SER GLY THR THR GLU SEQRES 9 C 127 ALA ASN ALA TRP LYS SER THR LEU VAL GLY HIS ALA THR SEQRES 10 C 127 PHE THR LYS VAL LYS PRO SER ALA ALA SER SEQRES 1 D 127 ALA GLU ALA GLY ILE THR GLY THR TRP TYR ASN GLN LEU SEQRES 2 D 127 GLY SER THR PHE ILE VAL THR ALA GLY ALA ASP GLY ALA SEQRES 3 D 127 LEU THR GLY THR TYR GLU ALA ALA VAL GLY ASN ALA GLU SEQRES 4 D 127 SER ARG TYR VAL LEU THR GLY ARG TYR ASP SER ALA PRO SEQRES 5 D 127 ALA THR ASP GLY SER GLY THR ALA LEU GLY TRP THR VAL SEQRES 6 D 127 ALA TRP LYS ASN ASN TYR ARG ASN ALA HIS SER ALA THR SEQRES 7 D 127 THR TRP SER GLY GLN TYR VAL GLY GLY ALA GLU ALA ARG SEQRES 8 D 127 ILE ASN THR GLN TRP LEU LEU THR SER GLY THR THR GLU SEQRES 9 D 127 ALA ASN ALA TRP LYS SER THR LEU VAL GLY HIS ALA THR SEQRES 10 D 127 PHE THR LYS VAL LYS PRO SER ALA ALA SER

HET BTN A5100 16 HET BTN B5200 16 HET BTN C5300 16 HET BTN D5400 16

HETNAM BTN BIOTIN

FORMUL 5 BTN 4(C10 H16 N2 O3 S) FORMUL 9 HOH *293(H2 O)

HELIX 1 1 THR A 115 LYS A 121 5 7 HELIX 2 2 ASN B 118 LYS B 121 5 4 HELIX 3 3 THR C 115 LYS C 121 5 7 HELIX 4 4 THR D 115 LYS D 121 5 7

SHEET 1 A 9 GLY A 19 TYR A 22 0 SHEET 2 A 9 THR A 28 ALA A 33 -1 O PHE A 29 N TRP A 21 SHEET 3 A 9 ALA A 38 GLU A 44 -1 O GLU A 44 N THR A 28 SHEET 4 A 9 ARG A 53 TYR A 60 -1 O TYR A 54 N TYR A 43 SHEET 5 A 9 THR A 71 LYS A 80 -1 O THR A 76 N THR A 57 SHEET 6 A 9 ASN A 85 VAL A 97 -1 O TYR A 96 N THR A 71 SHEET 7 A 9 ARG A 103 SER A 112 -1 O ARG A 103 N VAL A 97 SHEET 8 A 9 THR A 123 THR A 131 -1 O PHE A 130 N ILE A 104 SHEET 9 A 9 GLY A 19 TYR A 22 -1 N TYR A 22 O THR A 131 SHEET 1 B 9 GLY B 19 TYR B 22 0 SHEET 2 B 9 THR B 28 ALA B 33 -1 O PHE B 29 N TRP B 21 SHEET 3 B 9 ALA B 38 GLU B 44 -1 O THR B 40 N THR B 32 SHEET 4 B 9 TYR B 54 TYR B 60 -1 O GLY B 58 N LEU B 39 SHEET 5 B 9 THR B 71 LYS B 80 -1 O THR B 76 N THR B 57 SHEET 6 B 9 ASN B 85 VAL B 97 -1 O TYR B 96 N THR B 71 SHEET 7 B 9 ARG B 103 SER B 112 -1 O GLN B 107 N SER B 93 SHEET 8 B 9 THR B 123 THR B 131 -1 O GLY B 126 N TRP B 108 SHEET 9 B 9 GLY B 19 TYR B 22 -1 N TYR B 22 O THR B 131 SHEET 1 C 8 GLY C 19 TYR C 22 0 SHEET 2 C 8 THR C 28 ALA C 33 -1 O PHE C 29 N TRP C 21 SHEET 3 C 8 ALA C 38 GLU C 44 -1 O THR C 42 N ILE C 30 SHEET 4 C 8 TYR C 54 TYR C 60 -1 O TYR C 54 N TYR C 43 SHEET 5 C 8 THR C 71 LYS C 80 -1 O THR C 76 N THR C 57 SHEET 6 C 8 ASN C 85 VAL C 97 -1 O THR C 90 N VAL C 77 SHEET 7 C 8 ARG C 103 SER C 112 -1 O ARG C 103 N VAL C 97 SHEET 8 C 8 THR C 123 PHE C 130 -1 O ALA C 128 N THR C 106 SHEET 1 D 9 GLY D 19 ASN D 23 0 SHEET 2 D 9 THR D 28 ALA D 33 -1 O PHE D 29 N TRP D 21 SHEET 3 D 9 ALA D 38 GLU D 44 -1 O THR D 40 N THR D 32 SHEET 4 D 9 TYR D 54 TYR D 60 -1 O TYR D 54 N TYR D 43 SHEET 5 D 9 THR D 71 LYS D 80 -1 O THR D 76 N THR D 57 SHEET 6 D 9 ASN D 85 VAL D 97 -1 O TRP D 92 N TRP D 75 SHEET 7 D 9 ARG D 103 SER D 112 -1 O GLN D 107 N SER D 93 SHEET 8 D 9 THR D 123 THR D 131 -1 O ALA D 128 N THR D 106 SHEET 9 D 9 GLY D 19 ASN D 23 -1 N TYR D 22 O THR D 131

SITE 1 AC1 14 ASN A 23 SER A 27 TYR A 43 VAL A 47 SITE 2 AC1 14 ASN A 49 TRP A 79 SER A 88 THR A 90 SITE 3 AC1 14 TRP A 108 LEU A 110 HOH A6083 HOH A6244 SITE 4 AC1 14 HOH A6287 TRP D 120 SITE 1 AC2 15 ASN B 23 LEU B 25 SER B 27 TYR B 43 SITE 2 AC2 15 VAL B 47 GLY B 48 ASN B 49 TRP B 79 SITE 3 AC2 15 SER B 88 THR B 90 TRP B 108 HOH B6088 SITE 4 AC2 15 HOH B6156 HOH B6184 TRP C 120 SITE 1 AC3 15 TRP B 120 ASN C 23 SER C 27 TYR C 43 SITE 2 AC3 15 VAL C 47 GLY C 48 ASN C 49 TRP C 79 SITE 3 AC3 15 SER C 88 THR C 90 TRP C 108 LEU C 110 SITE 4 AC3 15 HOH C6043 HOH C6176 HOH C6235 SITE 1 AC4 15 ASN D 23 SER D 27 TYR D 43 VAL D 47 SITE 2 AC4 15 GLY D 48 ASN D 49 TRP D 79 ALA D 86 SITE 3 AC4 15 SER D 88 THR D 90 TRP D 108 HOH D6130 SITE 4 AC4 15 HOH D6165 HOH D6222 HOH D6239

CRYST1 50.645 97.857 52.168 90.00 112.28 90.00 P 1 21 1 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 0.019745 0.000000 0.008090 0.00000

SCALE2 0.000000 0.010219 0.000000 0.00000

SCALE3 0.000000 0.000000 0.020715 0.00000