PDB Short entry for 2DOB HEADER LIPID BINDING PROTEIN 28-APR-06 2DOB TITLE CRYSTAL STRUCTURE OF HUMAN SAPOSIN A COMPND MOL_ID: 1; COMPND 2 MOLECULE: PROACTIVATOR POLYPEPTIDE; COMPND 3 CHAIN: A; COMPND 4 FRAGMENT: SAPOSIN A, RESIDUES 60-140; COMPND 5 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606; SOURCE 5 GENE: PSAP; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: BL21(DE3) CODON PLUS; SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PET-16 KEYWDS SAPOSIN, SPHINGOLIPID ACTIVATOR PROTEIN, LIPID-BINDING PROTEIN, LIPID KEYWDS 2 BINDING PROTEIN EXPDTA X-RAY DIFFRACTION AUTHOR G.G.PRIVE,V.E.AHN REVDAT 4 13-JUL-11 2DOB 1 VERSN REVDAT 3 24-FEB-09 2DOB 1 VERSN REVDAT 2 15-AUG-06 2DOB 1 JRNL REVDAT 1 25-JUL-06 2DOB 0 JRNL AUTH V.E.AHN,P.LEYKO,J.R.ALATTIA,L.CHEN,G.G.PRIVE JRNL TITL CRYSTAL STRUCTURES OF SAPOSINS A AND C. JRNL REF PROTEIN SCI. V. 15 1849 2006 JRNL REFN ISSN 0961-8368 JRNL PMID 16823039 JRNL DOI 10.1110/PS.062256606 REMARK 2 REMARK 2 RESOLUTION. 2.00 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS 1.1 REMARK 3 AUTHORS : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE- REMARK 3 : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU, REMARK 3 : READ,RICE,SIMONSON,WARREN REMARK 3 REMARK 3 REFINEMENT TARGET : ENGH & HUBER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.00 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 27.18 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 1804049.900 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 97.9 REMARK 3 NUMBER OF REFLECTIONS : 5476 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : THROUGHOUT REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 R VALUE (WORKING SET) : 0.218 REMARK 3 FREE R VALUE : 0.267 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 12.400 REMARK 3 FREE R VALUE TEST SET COUNT : 678 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : 0.010 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 6 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 2.00 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 2.13 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 98.10 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 773 REMARK 3 BIN R VALUE (WORKING SET) : 0.1920 REMARK 3 BIN FREE R VALUE : 0.2380 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 10.90 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 95 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.024 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 617 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 1 REMARK 3 SOLVENT ATOMS : 68 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 16.10 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 25.70 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : -2.18000 REMARK 3 B22 (A**2) : 0.00000 REMARK 3 B33 (A**2) : 2.18000 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) : 0.23 REMARK 3 ESD FROM SIGMAA (A) : -0.06 REMARK 3 LOW RESOLUTION CUTOFF (A) : 5.00 REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : 0.30 REMARK 3 ESD FROM C-V SIGMAA (A) : 0.10 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.008 REMARK 3 BOND ANGLES (DEGREES) : 1.40 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 18.50 REMARK 3 IMPROPER ANGLES (DEGREES) : 1.11 REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : RESTRAINED REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : 1.920 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 3.030 ; 2.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 2.940 ; 2.000 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 4.520 ; 2.500 REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : FLAT MODEL REMARK 3 KSOL : 0.35 REMARK 3 BSOL : 48.04 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 : PROTEIN_REP.PARAM REMARK 3 PARAMETER FILE 2 : WATER_REP.PARAM REMARK 3 PARAMETER FILE 3 : ION.PARAM REMARK 3 PARAMETER FILE 4 : NULL REMARK 3 TOPOLOGY FILE 1 : PROTEIN.TOP REMARK 3 TOPOLOGY FILE 2 : WATER.TOP REMARK 3 TOPOLOGY FILE 3 : ION.TOP REMARK 3 TOPOLOGY FILE 4 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 2DOB COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 01-MAY-06. REMARK 100 THE RCSB ID CODE IS RCSB025649. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 04-SEP-03 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 6 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : CHESS REMARK 200 BEAMLINE : F2 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.96119, 0.9794 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 4 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : ADSC, DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 5495 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.000 REMARK 200 RESOLUTION RANGE LOW (A) : 30.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : -3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 98.9 REMARK 200 DATA REDUNDANCY : 11.500 REMARK 200 R MERGE (I) : 0.08900 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) : 2.00 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 2.07 REMARK 200 COMPLETENESS FOR SHELL (%) : 100.0 REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : 0.18000 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: MAD REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MAD REMARK 200 SOFTWARE USED: SOLVE REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 42.24 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.13 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: PEG 8K, CALCIUM ACETATE, MES BUFFER, REMARK 280 PH 6, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 298K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 21 21 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+1/2,Y+1/2,-Z 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 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 22.84000 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 25.02000 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 22.84000 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 25.02000 REMARK 290 SMTRY3 4 0.000000 0.000000 -1.000000 0.00000 REMARK 290 REMARK 290 REMARK: NULL REMARK 300 REMARK 300 BIOMOLECULE: 1, 2 REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON REMARK 300 BURIED SURFACE AREA. REMARK 350 REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS REMARK 350 GIVEN BELOW. BOTH NON-CRYSTALLOGRAPHIC AND REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN. REMARK 350 REMARK 350 BIOMOLECULE: 1 REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: MONOMERIC REMARK 350 SOFTWARE USED: PQS REMARK 350 APPLY THE FOLLOWING TO CHAINS: A REMARK 350 BIOMT1 1 1.000000 0.000000 0.000000 0.00000 REMARK 350 BIOMT2 1 0.000000 1.000000 0.000000 0.00000 REMARK 350 BIOMT3 1 0.000000 0.000000 1.000000 0.00000 REMARK 350 REMARK 350 BIOMOLECULE: 2 REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 1560 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 8820 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -33.0 KCAL/MOL REMARK 350 APPLY THE FOLLOWING TO CHAINS: A 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 91.36000 REMARK 350 BIOMT2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 350 BIOMT3 2 0.000000 0.000000 1.000000 0.00000 REMARK 465 REMARK 465 MISSING RESIDUES REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.) REMARK 465 REMARK 465 M RES C SSSEQI REMARK 465 MET A -1 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 A 567 O HOH A 567 2755 1.77 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 1 -100.19 69.12 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 TYR A 30 0.08 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 A 553 DISTANCE = 6.14 ANGSTROMS REMARK 525 HOH A 563 DISTANCE = 5.14 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 601 CA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HOH A 506 O REMARK 620 2 HOH A 503 O 73.6 REMARK 620 3 HOH A 513 O 157.0 85.3 REMARK 620 4 ASP A 36 O 96.6 78.6 87.8 REMARK 620 5 ASP A 9 OD1 77.2 150.2 124.4 98.9 REMARK 620 6 HOH A 502 O 81.3 102.2 94.7 177.4 79.1 REMARK 620 7 ASP A 9 OD2 127.3 159.0 74.2 95.6 50.3 84.4 REMARK 620 N 1 2 3 4 5 6 REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CA A 601 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1N69 RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF HUMAN SAPOSIN B REMARK 900 RELATED ID: 1M12 RELATED DB: PDB REMARK 900 NMR STRUCTURE OF HUMAN SAPOSIN C REMARK 900 RELATED ID: 2GTG RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF HUMAN SAPOSIN C DBREF 2DOB A 1 81 UNP P07602 SAP_HUMAN 60 140 SEQADV 2DOB MET A -1 UNP P07602 INITIATING METHIONINE SEQADV 2DOB GLY A 0 UNP P07602 CLONING ARTIFACT SEQADV 2DOB MSE A 17 UNP P07602 MET 76 MODIFIED RESIDUE SEQADV 2DOB MSE A 43 UNP P07602 MET 102 MODIFIED RESIDUE SEQADV 2DOB MSE A 66 UNP P07602 MET 125 MODIFIED RESIDUE SEQRES 1 A 83 MET GLY SER LEU PRO CYS ASP ILE CYS LYS ASP VAL VAL SEQRES 2 A 83 THR ALA ALA GLY ASP MSE LEU LYS ASP ASN ALA THR GLU SEQRES 3 A 83 GLU GLU ILE LEU VAL TYR LEU GLU LYS THR CYS ASP TRP SEQRES 4 A 83 LEU PRO LYS PRO ASN MSE SER ALA SER CYS LYS GLU ILE SEQRES 5 A 83 VAL ASP SER TYR LEU PRO VAL ILE LEU ASP ILE ILE LYS SEQRES 6 A 83 GLY GLU MSE SER ARG PRO GLY GLU VAL CYS SER ALA LEU SEQRES 7 A 83 ASN LEU CYS GLU SER MODRES 2DOB MSE A 17 MET SELENOMETHIONINE MODRES 2DOB MSE A 43 MET SELENOMETHIONINE MODRES 2DOB MSE A 66 MET SELENOMETHIONINE HET MSE A 17 8 HET MSE A 43 8 HET MSE A 66 8 HET CA A 601 1 HETNAM MSE SELENOMETHIONINE HETNAM CA CALCIUM ION FORMUL 1 MSE 3(C5 H11 N O2 SE) FORMUL 2 CA CA 2+ FORMUL 3 HOH *68(H2 O) HELIX 1 1 SER A 1 ASP A 20 1 20 HELIX 2 2 THR A 23 CYS A 35 1 13 HELIX 3 3 ASP A 36 LEU A 38 5 3 HELIX 4 4 LYS A 40 ILE A 62 1 23 HELIX 5 5 ARG A 68 LEU A 76 1 9 SSBOND 1 CYS A 4 CYS A 79 1555 1555 2.04 SSBOND 2 CYS A 7 CYS A 73 1555 1555 2.04 SSBOND 3 CYS A 35 CYS A 47 1555 1555 2.04 LINK C ASP A 16 N MSE A 17 1555 1555 1.33 LINK C MSE A 17 N LEU A 18 1555 1555 1.33 LINK C ASN A 42 N MSE A 43 1555 1555 1.33 LINK C MSE A 43 N SER A 44 1555 1555 1.33 LINK C GLU A 65 N MSE A 66 1555 1555 1.32 LINK C MSE A 66 N SER A 67 1555 1555 1.34 LINK CA CA A 601 O HOH A 506 1555 1555 2.52 LINK CA CA A 601 O HOH A 503 1555 1555 2.58 LINK CA CA A 601 O HOH A 513 1555 1555 2.51 LINK CA CA A 601 O ASP A 36 1555 1555 2.49 LINK CA CA A 601 OD1 ASP A 9 1555 2755 2.62 LINK CA CA A 601 O HOH A 502 1555 2755 2.54 LINK CA CA A 601 OD2 ASP A 9 1555 2755 2.57 SITE 1 AC1 6 ASP A 9 ASP A 36 HOH A 502 HOH A 503 SITE 2 AC1 6 HOH A 506 HOH A 513 CRYST1 45.680 50.040 33.820 90.00 90.00 90.00 P 21 21 2 4 ORIGX1 1.000000 0.000000 0.000000 0.00000 ORIGX2 0.000000 1.000000 0.000000 0.00000 ORIGX3 0.000000 0.000000 1.000000 0.00000 SCALE1 0.021891 0.000000 0.000000 0.00000 SCALE2 0.000000 0.019984 0.000000 0.00000 SCALE3 0.000000 0.000000 0.029568 0.00000