1KL3 - Header Asymmetric Unit

HEADER PEPTIDE BINDING PROTEIN 11-DEC-01 1KL3

TITLE AN ENGINEERED STREPTAVIDIN WITH IMPROVED AFFINITY FOR THE TITLE 2 STREP-TAG II PEPTIDE : SAM1-STREPII

COMPND MOL_ID: 1; COMPND 2 MOLECULE: STREPTAVIDIN; COMPND 3 CHAIN: A, B, C, D; COMPND 4 ENGINEERED: YES; COMPND 5 MUTATION: YES; COMPND 6 MOL_ID: 2; COMPND 7 MOLECULE: STREP-TAG II PEPTIDE; COMPND 8 CHAIN: E, F, G, H; COMPND 9 ENGINEERED: YES

SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: STREPTOMYCES AVIDINII; SOURCE 3 ORGANISM_TAXID: 1895; SOURCE 4 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 5 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 6 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 7 EXPRESSION_SYSTEM_PLASMID: PSA1; SOURCE 8 MOL_ID: 2; SOURCE 9 SYNTHETIC: YES; SOURCE 10 OTHER_DETAILS: THE STREP-TAG II PEPTIDE IS CHEMICALLY SOURCE 11 SYNTHESIZED AND WAS SELECTED BY SYNTHETIC PEPTIDE SPOT SOURCE 12 ASSAYS FROM A SUBSET OF STREP-TAG DERIVATIVES.

KEYWDS BIOTIN, CRYSTAL STRUCTURE, PROTEIN ENGINEERING, STREP-TAG, KEYWDS 2 STREPTAVIDIN, PEPTIDE BINDING PROTEIN

EXPDTA X-RAY DIFFRACTION

AUTHOR I.P.KORNDOERFER,A.SKERRA

REVDAT 4 24-FEB-09 1KL3 1 VERSN REVDAT 3 01-APR-03 1KL3 1 JRNL REVDAT 2 01-MAY-02 1KL3 1 HEADER REVDAT 1 03-APR-02 1KL3 0

JRNL AUTH I.P.KORNDORFER,A.SKERRA JRNL TITL IMPROVED AFFINITY OF ENGINEERED STREPTAVIDIN FOR JRNL TITL 2 THE STREP-TAG II PEPTIDE IS DUE TO A FIXED OPEN JRNL TITL 3 CONFORMATION OF THE LID-LIKE LOOP AT THE BINDING JRNL TITL 4 SITE. JRNL REF PROTEIN SCI. V. 11 883 2002 JRNL REFN ISSN 0961-8368 JRNL PMID 11910031 JRNL DOI 10.1110/PS.4150102

REMARK 1

REMARK 2 REMARK 2 RESOLUTION. 1.70 ANGSTROMS.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC REMARK 3 AUTHORS : MURSHUDOV,VAGIN,DODSON REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.70 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 36.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 94.8 REMARK 3 NUMBER OF REFLECTIONS : 46287 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : NULL REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 R VALUE (WORKING + TEST SET) : 0.177 REMARK 3 R VALUE (WORKING SET) : 0.175 REMARK 3 FREE R VALUE : 0.217 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.000 REMARK 3 FREE R VALUE TEST SET COUNT : 2430 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 3816 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 0 REMARK 3 SOLVENT ATOMS : 238 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 25.45 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : -0.42000 REMARK 3 B22 (A**2) : 0.16000 REMARK 3 B33 (A**2) : 0.31000 REMARK 3 B12 (A**2) : 0.00000 REMARK 3 B13 (A**2) : 0.16000 REMARK 3 B23 (A**2) : 0.00000 REMARK 3 REMARK 3 ESTIMATED OVERALL COORDINATE ERROR. REMARK 3 ESU BASED ON R VALUE (A): 0.113 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.113 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.101 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 3.021 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 DISTANCE RESTRAINTS. RMS SIGMA REMARK 3 BOND LENGTH (A) : 0.018 ; 0.021 REMARK 3 ANGLE DISTANCE (A) : 2.773 ; 1.884 REMARK 3 INTRAPLANAR 1-4 DISTANCE (A) : NULL ; NULL REMARK 3 H-BOND OR METAL COORDINATION (A) : NULL ; NULL REMARK 3 REMARK 3 PLANE RESTRAINT (A) : NULL ; NULL REMARK 3 CHIRAL-CENTER RESTRAINT (A**3) : NULL ; NULL REMARK 3 REMARK 3 NON-BONDED CONTACT RESTRAINTS. REMARK 3 SINGLE TORSION (A) : NULL ; NULL REMARK 3 MULTIPLE TORSION (A) : NULL ; NULL REMARK 3 H-BOND (X...Y) (A) : NULL ; NULL REMARK 3 H-BOND (X-H...Y) (A) : NULL ; NULL REMARK 3 REMARK 3 CONFORMATIONAL TORSION ANGLE RESTRAINTS. REMARK 3 SPECIFIED (DEGREES) : NULL ; NULL REMARK 3 PLANAR (DEGREES) : NULL ; NULL REMARK 3 STAGGERED (DEGREES) : NULL ; NULL REMARK 3 TRANSVERSE (DEGREES) : NULL ; 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 OTHER REFINEMENT REMARKS: NULL

REMARK 4 REMARK 4 1KL3 COMPLIES WITH FORMAT V. 3.15, 01-DEC-08

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 19-DEC-01. REMARK 100 THE RCSB ID CODE IS RCSB015069.

REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 21-JUL-01 REMARK 200 TEMPERATURE (KELVIN) : 298.0 REMARK 200 PH : 6.9 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 RU300 REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.5418 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : OSMIC MIRRORS 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 : 49002 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.700 REMARK 200 RESOLUTION RANGE LOW (A) : 36.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : -3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 94.8 REMARK 200 DATA REDUNDANCY : 2.600 REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : 0.04000 REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 23.8000 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 (%) : 90.3 REMARK 200 DATA REDUNDANCY IN SHELL : 2.38 REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : 0.34800 REMARK 200 <I/SIGMA(I)> FOR SHELL : 3.200 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: FOURIER SYNTHESIS REMARK 200 SOFTWARE USED: CNS REMARK 200 STARTING MODEL: 1SWU REMARK 200 REMARK 200 REMARK: NULL

REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 44.00 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.20 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 100 MM NA2HPO4, 1.3-M (NH4)2SO4, PH REMARK 280 6.9, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 293K

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 43.16950 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 300 REMARK: THE BIOLOGICAL ASSEMBLY IS ONE OF THE TETRAMERS IN THE REMARK 300 ASYMMETRIC UNIT

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: OCTAMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: OCTAMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 12500 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 20090 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -76.0 KCAL/MOL REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C, D, E, F, G, H 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 MET A 13 REMARK 465 GLU A 14 REMARK 465 ALA A 15 REMARK 465 ALA A 137 REMARK 465 ALA A 138 REMARK 465 SER A 139 REMARK 465 MET B 13 REMARK 465 GLU B 14 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 MET C 13 REMARK 465 GLU C 14 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 MET D 13 REMARK 465 GLU D 14 REMARK 465 ALA D 15 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 465 ASN E 1 REMARK 465 TRP E 2 REMARK 465 LYS E 9 REMARK 465 ASN F 1 REMARK 465 TRP F 2 REMARK 465 SER F 3 REMARK 465 ASN G 1 REMARK 465 TRP G 2 REMARK 465 SER G 3 REMARK 465 ASN H 1 REMARK 465 TRP H 2 REMARK 465 SER H 3

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 ALA C 15 O HOH C 166 1.86 REMARK 500 OE1 GLN D 107 O HOH D 171 1.89 REMARK 500 NE2 GLN C 24 O HOH C 163 2.01 REMARK 500 OE1 GLN C 24 O HOH C 179 2.08 REMARK 500 O HOH A 167 O HOH A 178 2.19 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 NZ LYS C 132 O HOH B 178 1455 2.05 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 ASP A 36 CB - CG - OD2 ANGL. DEV. = 7.6 DEGREES REMARK 500 ARG A 53 NE - CZ - NH1 ANGL. DEV. = 3.1 DEGREES REMARK 500 TYR A 60 CB - CG - CD2 ANGL. DEV. = -4.1 DEGREES REMARK 500 ASP A 128 CB - CG - OD1 ANGL. DEV. = -9.1 DEGREES REMARK 500 ASP A 128 CB - CG - OD2 ANGL. DEV. = 15.4 DEGREES REMARK 500 ASP B 128 OD1 - CG - OD2 ANGL. DEV. = -12.2 DEGREES REMARK 500 ASP B 128 CB - CG - OD2 ANGL. DEV. = 8.4 DEGREES REMARK 500 LYS B 132 CD - CE - NZ ANGL. DEV. = 17.1 DEGREES REMARK 500 ARG C 59 NE - CZ - NH2 ANGL. DEV. = -3.0 DEGREES REMARK 500 ASP C 67 CB - CG - OD2 ANGL. DEV. = 6.1 DEGREES REMARK 500 ARG C 84 NE - CZ - NH2 ANGL. DEV. = -3.7 DEGREES REMARK 500 ASP D 128 CB - CG - OD2 ANGL. DEV. = 8.0 DEGREES REMARK 500 LYS D 132 CD - CE - NZ ANGL. DEV. = 17.9 DEGREES REMARK 500 PHE G 7 CB - CG - CD2 ANGL. DEV. = 7.8 DEGREES REMARK 500 PHE G 7 CB - CG - CD1 ANGL. DEV. = -8.4 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 TRP B 79 49.63 -80.07 REMARK 500 ASN B 81 -153.55 -132.18 REMARK 500 GLU B 101 62.53 -116.70 REMARK 500 GLU C 101 51.60 -110.43 REMARK 500 TRP D 79 49.37 -84.39 REMARK 500 GLU D 101 61.96 79.52 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 173 DISTANCE = 5.26 ANGSTROMS REMARK 525 HOH A 178 DISTANCE = 5.89 ANGSTROMS REMARK 525 HOH B 178 DISTANCE = 6.32 ANGSTROMS REMARK 525 HOH C 178 DISTANCE = 6.75 ANGSTROMS REMARK 525 HOH A 207 DISTANCE = 6.51 ANGSTROMS

REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1KFF RELATED DB: PDB REMARK 900 AN ENGINEERED STREPTAVIDIN WITH IMPROVED AFFINITY FOR THE REMARK 900 STREP-TAG II PEPTIDE : APO-SAM1 REMARK 900 RELATED ID: 1KL4 RELATED DB: PDB REMARK 900 AN ENGINEERED STREPTAVIDIN WITH IMPROVED AFFINITY FOR THE REMARK 900 STREP-TAG II PEPTIDE : APO-SAM2 REMARK 900 RELATED ID: 1KL5 RELATED DB: PDB REMARK 900 AN ENGINEERED STREPTAVIDIN WITH IMPROVED AFFINITY FOR THE REMARK 900 STREP-TAG II PEPTIDE : : SAM2-STREPII REMARK 900 RELATED ID: 1RSU RELATED DB: PDB REMARK 900 COMPLEX BETWEEN WILD-TYPE STREPTAVIDIN AND THE STREP-TAG II REMARK 900 PEPTIDE

DBREF 1KL3 A 14 139 UNP P22629 SAV_STRAV 38 163 DBREF 1KL3 B 14 139 UNP P22629 SAV_STRAV 38 163 DBREF 1KL3 C 14 139 UNP P22629 SAV_STRAV 38 163 DBREF 1KL3 D 14 139 UNP P22629 SAV_STRAV 38 163 DBREF 1KL3 E 1 9 PDB 1KL3 1KL3 1 9 DBREF 1KL3 F 1 9 PDB 1KL3 1KL3 1 9 DBREF 1KL3 G 1 9 PDB 1KL3 1KL3 1 9 DBREF 1KL3 H 1 9 PDB 1KL3 1KL3 1 9

SEQADV 1KL3 MET A 13 UNP P22629 INITIATING MET SEQADV 1KL3 VAL A 44 UNP P22629 GLU 68 ENGINEERED SEQADV 1KL3 THR A 45 UNP P22629 SER 69 ENGINEERED SEQADV 1KL3 ARG A 47 UNP P22629 VAL 71 ENGINEERED SEQADV 1KL3 MET B 13 UNP P22629 INITIATING MET SEQADV 1KL3 VAL B 44 UNP P22629 GLU 68 ENGINEERED SEQADV 1KL3 THR B 45 UNP P22629 SER 69 ENGINEERED SEQADV 1KL3 ARG B 47 UNP P22629 VAL 71 ENGINEERED SEQADV 1KL3 MET C 13 UNP P22629 INITIATING MET SEQADV 1KL3 VAL C 44 UNP P22629 GLU 68 ENGINEERED SEQADV 1KL3 THR C 45 UNP P22629 SER 69 ENGINEERED SEQADV 1KL3 ARG C 47 UNP P22629 VAL 71 ENGINEERED SEQADV 1KL3 MET D 13 UNP P22629 INITIATING MET SEQADV 1KL3 VAL D 44 UNP P22629 GLU 68 ENGINEERED SEQADV 1KL3 THR D 45 UNP P22629 SER 69 ENGINEERED SEQADV 1KL3 ARG D 47 UNP P22629 VAL 71 ENGINEERED

SEQRES 1 A 127 MET 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 VAL THR ALA ARG 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 ASP THR SEQRES 10 A 127 PHE THR LYS VAL LYS PRO SER ALA ALA SER SEQRES 1 B 127 MET 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 VAL THR ALA ARG 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 ASP THR SEQRES 10 B 127 PHE THR LYS VAL LYS PRO SER ALA ALA SER SEQRES 1 C 127 MET 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 VAL THR ALA ARG 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 ASP THR SEQRES 10 C 127 PHE THR LYS VAL LYS PRO SER ALA ALA SER SEQRES 1 D 127 MET 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 VAL THR ALA ARG 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 ASP THR SEQRES 10 D 127 PHE THR LYS VAL LYS PRO SER ALA ALA SER SEQRES 1 E 9 ASN TRP SER HIS PRO GLN PHE GLU LYS SEQRES 1 F 9 ASN TRP SER HIS PRO GLN PHE GLU LYS SEQRES 1 G 9 ASN TRP SER HIS PRO GLN PHE GLU LYS SEQRES 1 H 9 ASN TRP SER HIS PRO GLN PHE GLU LYS

FORMUL 9 HOH *238(H2 O)

HELIX 1 1 ASN A 49 GLU A 51 5 3 HELIX 2 2 THR A 115 LYS A 121 5 7 HELIX 3 3 ASN B 49 GLU B 51 5 3 HELIX 4 4 ASN B 118 LYS B 121 5 4 HELIX 5 5 ASN C 49 GLU C 51 5 3 HELIX 6 6 THR C 115 LYS C 121 5 7 HELIX 7 7 ASN D 49 GLU D 51 5 3 HELIX 8 8 THR D 115 LYS D 121 5 7 HELIX 9 9 HIS E 4 GLU E 8 5 5 HELIX 10 10 HIS F 4 GLU F 8 5 5 HELIX 11 11 HIS G 4 GLU G 8 5 5 HELIX 12 12 HIS H 4 GLU H 8 5 5

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 VAL A 44 -1 O VAL 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 THR A 90 N VAL A 77 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 VAL B 44 -1 O VAL B 44 N THR B 28 SHEET 4 B 9 ARG B 53 TYR B 60 -1 O TYR B 54 N TYR B 43 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 GLY B 94 N LEU B 73 SHEET 7 B 9 ARG B 103 SER B 112 -1 O ARG B 103 N VAL B 97 SHEET 8 B 9 THR B 123 THR B 131 -1 O ASP B 128 N THR B 106 SHEET 9 B 9 GLY B 19 TYR B 22 -1 N TYR B 22 O THR B 131 SHEET 1 C 9 GLY C 19 TYR C 22 0 SHEET 2 C 9 THR C 28 ALA C 33 -1 O PHE C 29 N TRP C 21 SHEET 3 C 9 ALA C 38 VAL C 44 -1 O THR C 42 N ILE C 30 SHEET 4 C 9 ARG C 53 TYR C 60 -1 O TYR C 54 N TYR C 43 SHEET 5 C 9 THR C 71 LYS C 80 -1 O THR C 76 N THR C 57 SHEET 6 C 9 ASN C 85 VAL C 97 -1 O TYR C 96 N THR C 71 SHEET 7 C 9 ARG C 103 SER C 112 -1 O THR C 111 N ALA C 89 SHEET 8 C 9 THR C 123 THR C 131 -1 O ASP C 128 N THR C 106 SHEET 9 C 9 GLY C 19 TYR C 22 -1 N TYR C 22 O THR C 131 SHEET 1 D 9 GLY D 19 TYR D 22 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 VAL D 44 -1 O VAL D 44 N THR D 28 SHEET 4 D 9 ARG D 53 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 THR D 90 N VAL D 77 SHEET 7 D 9 ARG D 103 SER D 112 -1 O THR D 111 N ALA D 89 SHEET 8 D 9 THR D 123 THR D 131 -1 O ASP D 128 N THR D 106 SHEET 9 D 9 GLY D 19 TYR D 22 -1 N TYR D 22 O THR D 131

CRYST1 58.699 86.339 47.448 90.00 98.92 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 0.017036 0.000000 0.002673 0.00000

SCALE2 0.000000 0.011582 0.000000 0.00000

SCALE3 0.000000 0.000000 0.021333 0.00000