HEADER ENDOCYTOSIS/EXOCYTOSIS 08-JAN-01 1HVV TITLE SELF-ASSOCIATION OF THE H3 REGION OF SYNTAXIN 1A: TITLE 2 IMPLICATIONS FOR SNARE COMPLEX ASSEMBLY COMPND MOL_ID: 1; COMPND 2 MOLECULE: SYNTAXIN 1A; COMPND 3 CHAIN: A, B, C, D; COMPND 4 FRAGMENT: RESIDUES 190-264; COMPND 5 SYNONYM: NEURON-SPECIFIC ANTIGEN HPC-1, SYNAPTOTAGMIN COMPND 6 ASSOCIATED 35 KDA PROTEIN; COMPND 7 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: RATTUS NORVEGICUS; SOURCE 3 ORGANISM_COMMON: NORWAY RAT; SOURCE 4 ORGANISM_TAXID: 10116; SOURCE 5 GENE: STX1A; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: AB1899; SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PGEX-KG KEYWDS FOUR-HELIX BUNDLE, HOMOTETRAMER, ALPHA-HELIX,, KEYWDS 2 ENDOCYTOSIS/EXOCYTOSIS COMPLEX EXPDTA X-RAY DIFFRACTION AUTHOR K.M.S.MISURA,R.H.SCHELLER,W.I.WEIS REVDAT 4 24-FEB-09 1HVV 1 VERSN REVDAT 3 01-APR-03 1HVV 1 JRNL REVDAT 2 02-MAY-01 1HVV 1 JRNL REVDAT 1 31-JAN-01 1HVV 0 JRNL AUTH K.M.MISURA,R.H.SCHELLER,W.I.WEIS JRNL TITL SELF-ASSOCIATION OF THE H3 REGION OF SYNTAXIN 1A. JRNL TITL 2 IMPLICATIONS FOR INTERMEDIATES IN SNARE COMPLEX JRNL TITL 3 ASSEMBLY. JRNL REF J.BIOL.CHEM. V. 276 13273 2001 JRNL REFN ISSN 0021-9258 JRNL PMID 11118447 JRNL DOI 10.1074/JBC.M009636200 REMARK 1 REMARK 2 REMARK 2 RESOLUTION. 2.40 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS 0.5 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) : 2.40 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 30.00 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 2243567.950 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 96.3 REMARK 3 NUMBER OF REFLECTIONS : 20125 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) : 0.238 REMARK 3 FREE R VALUE : 0.273 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 7.800 REMARK 3 FREE R VALUE TEST SET COUNT : 1563 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : 0.007 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) : 2.40 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 2.47 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 91.30 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 2875 REMARK 3 BIN R VALUE (WORKING SET) : 0.2440 REMARK 3 BIN FREE R VALUE : 0.2860 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 7.80 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 244 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.018 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2078 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 10 REMARK 3 SOLVENT ATOMS : 53 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 28.00 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 41.70 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 1.60000 REMARK 3 B22 (A**2) : 1.60000 REMARK 3 B33 (A**2) : -3.21000 REMARK 3 B12 (A**2) : 7.68000 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) : 0.31 REMARK 3 ESD FROM SIGMAA (A) : 0.17 REMARK 3 LOW RESOLUTION CUTOFF (A) : 6.00 REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : 0.37 REMARK 3 ESD FROM C-V SIGMAA (A) : 0.26 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.007 REMARK 3 BOND ANGLES (DEGREES) : 0.90 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 15.70 REMARK 3 IMPROPER ANGLES (DEGREES) : 0.66 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) : 1.260 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 2.120 ; 2.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 2.340 ; 2.000 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 3.450 ; 2.500 REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : FLAT MODEL REMARK 3 KSOL : 0.35 REMARK 3 BSOL : 36.20 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 : TAR.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 : TAR.TOP REMARK 3 TOPOLOGY FILE 4 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1HVV COMPLIES WITH FORMAT V. 3.15, 01-DEC-08 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 09-JAN-01. REMARK 100 THE RCSB ID CODE IS RCSB012613. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 03-APR-95 REMARK 200 TEMPERATURE (KELVIN) : 100.0 REMARK 200 PH : 5.0 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 RU200 REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.54 REMARK 200 MONOCHROMATOR : GRAPHITE REMARK 200 OPTICS : MIRRORS REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : RIGAKU RAXIS II REMARK 200 INTENSITY-INTEGRATION SOFTWARE : DENZO REMARK 200 DATA SCALING SOFTWARE : SCALEPACK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 20870 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.400 REMARK 200 RESOLUTION RANGE LOW (A) : 45.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.2 REMARK 200 DATA REDUNDANCY : 3.800 REMARK 200 R MERGE (I) : 0.06900 REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : 19.8000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.40 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 45.00 REMARK 200 COMPLETENESS FOR SHELL (%) : 99.1 REMARK 200 DATA REDUNDANCY IN SHELL : 3.20 REMARK 200 R MERGE FOR SHELL (I) : 0.31300 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH 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 (%): 65.00 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 3.67 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: SODIUM POTASSIUM TARTRATE, SODIUM REMARK 280 ACETATE, PH 5.0, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE REMARK 280 293K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 31 2 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -Y,X-Y,Z+1/3 REMARK 290 3555 -X+Y,-X,Z+2/3 REMARK 290 4555 Y,X,-Z REMARK 290 5555 X-Y,-Y,-Z+2/3 REMARK 290 6555 -X,-X+Y,-Z+1/3 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 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 2 0.866025 -0.500000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 38.54000 REMARK 290 SMTRY1 3 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 3 -0.866025 -0.500000 0.000000 0.00000 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 77.08000 REMARK 290 SMTRY1 4 -0.500000 0.866025 0.000000 0.00000 REMARK 290 SMTRY2 4 0.866025 0.500000 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 0.00000 REMARK 290 SMTRY2 5 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 5 0.000000 0.000000 -1.000000 77.08000 REMARK 290 SMTRY1 6 -0.500000 -0.866025 0.000000 0.00000 REMARK 290 SMTRY2 6 -0.866025 0.500000 0.000000 0.00000 REMARK 290 SMTRY3 6 0.000000 0.000000 -1.000000 38.54000 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 AN ANTI-PARALLEL HOMOTETRAMER REMARK 300 CONTAINED WITHIN ONE 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: TETRAMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 10240 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 15280 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -108.0 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 TYR A 257 REMARK 465 GLN A 258 REMARK 465 SER A 259 REMARK 465 LYS A 260 REMARK 465 ALA A 261 REMARK 465 ARG A 262 REMARK 465 ARG A 263 REMARK 465 LYS A 264 REMARK 465 GLN B 190 REMARK 465 ALA B 191 REMARK 465 LEU B 192 REMARK 465 VAL B 255 REMARK 465 LYS B 256 REMARK 465 TYR B 257 REMARK 465 GLN B 258 REMARK 465 SER B 259 REMARK 465 LYS B 260 REMARK 465 ALA B 261 REMARK 465 ARG B 262 REMARK 465 ARG B 263 REMARK 465 LYS B 264 REMARK 465 LYS C 256 REMARK 465 TYR C 257 REMARK 465 GLN C 258 REMARK 465 SER C 259 REMARK 465 LYS C 260 REMARK 465 ALA C 261 REMARK 465 ARG C 262 REMARK 465 ARG C 263 REMARK 465 LYS C 264 REMARK 465 GLN D 190 REMARK 465 ALA D 191 REMARK 465 LEU D 192 REMARK 465 ALA D 254 REMARK 465 VAL D 255 REMARK 465 LYS D 256 REMARK 465 TYR D 257 REMARK 465 GLN D 258 REMARK 465 SER D 259 REMARK 465 LYS D 260 REMARK 465 ALA D 261 REMARK 465 ARG D 262 REMARK 465 ARG D 263 REMARK 465 LYS D 264 REMARK 470 REMARK 470 MISSING ATOM REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS(M=MODEL NUMBER; REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; REMARK 470 I=INSERTION CODE): REMARK 470 M RES CSSEQI ATOMS REMARK 470 LYS A 256 CG CD CE NZ REMARK 470 LYS D 253 CG CD CE NZ 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 THR D 251 41.04 -85.13 REMARK 500 LYS D 252 106.00 31.36 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 TAR C 1352 DBREF 1HVV A 190 264 UNP P32851 STX1A_RAT 190 264 DBREF 1HVV B 190 264 UNP P32851 STX1A_RAT 190 264 DBREF 1HVV C 190 264 UNP P32851 STX1A_RAT 190 264 DBREF 1HVV D 190 264 UNP P32851 STX1A_RAT 190 264 SEQRES 1 A 75 GLN ALA LEU SER GLU ILE GLU THR ARG HIS SER GLU ILE SEQRES 2 A 75 ILE LYS LEU GLU ASN SER ILE ARG GLU LEU HIS ASP MET SEQRES 3 A 75 PHE MET ASP MET ALA MET LEU VAL GLU SER GLN GLY GLU SEQRES 4 A 75 MET ILE ASP ARG ILE GLU TYR ASN VAL GLU HIS ALA VAL SEQRES 5 A 75 ASP TYR VAL GLU ARG ALA VAL SER ASP THR LYS LYS ALA SEQRES 6 A 75 VAL LYS TYR GLN SER LYS ALA ARG ARG LYS SEQRES 1 B 75 GLN ALA LEU SER GLU ILE GLU THR ARG HIS SER GLU ILE SEQRES 2 B 75 ILE LYS LEU GLU ASN SER ILE ARG GLU LEU HIS ASP MET SEQRES 3 B 75 PHE MET ASP MET ALA MET LEU VAL GLU SER GLN GLY GLU SEQRES 4 B 75 MET ILE ASP ARG ILE GLU TYR ASN VAL GLU HIS ALA VAL SEQRES 5 B 75 ASP TYR VAL GLU ARG ALA VAL SER ASP THR LYS LYS ALA SEQRES 6 B 75 VAL LYS TYR GLN SER LYS ALA ARG ARG LYS SEQRES 1 C 75 GLN ALA LEU SER GLU ILE GLU THR ARG HIS SER GLU ILE SEQRES 2 C 75 ILE LYS LEU GLU ASN SER ILE ARG GLU LEU HIS ASP MET SEQRES 3 C 75 PHE MET ASP MET ALA MET LEU VAL GLU SER GLN GLY GLU SEQRES 4 C 75 MET ILE ASP ARG ILE GLU TYR ASN VAL GLU HIS ALA VAL SEQRES 5 C 75 ASP TYR VAL GLU ARG ALA VAL SER ASP THR LYS LYS ALA SEQRES 6 C 75 VAL LYS TYR GLN SER LYS ALA ARG ARG LYS SEQRES 1 D 75 GLN ALA LEU SER GLU ILE GLU THR ARG HIS SER GLU ILE SEQRES 2 D 75 ILE LYS LEU GLU ASN SER ILE ARG GLU LEU HIS ASP MET SEQRES 3 D 75 PHE MET ASP MET ALA MET LEU VAL GLU SER GLN GLY GLU SEQRES 4 D 75 MET ILE ASP ARG ILE GLU TYR ASN VAL GLU HIS ALA VAL SEQRES 5 D 75 ASP TYR VAL GLU ARG ALA VAL SER ASP THR LYS LYS ALA SEQRES 6 D 75 VAL LYS TYR GLN SER LYS ALA ARG ARG LYS HET TAR C1352 10 HETNAM TAR D(-)-TARTARIC ACID FORMUL 5 TAR C4 H6 O6 FORMUL 6 HOH *53(H2 O) HELIX 1 1 SER A 193 ALA A 254 1 62 HELIX 2 2 SER B 193 LYS B 253 1 61 HELIX 3 3 SER C 193 GLU C 211 1 19 HELIX 4 4 GLU C 211 ALA C 254 1 44 HELIX 5 5 SER D 193 ASP D 250 1 58 SITE 1 AC1 9 GLY A 227 ILE A 230 ASP A 231 ILE C 209 SITE 2 AC1 9 ARG C 210 LEU C 212 HIS C 213 HOH C1357 SITE 3 AC1 9 HOH C1361 CRYST1 88.320 88.320 115.620 90.00 90.00 120.00 P 31 2 1 24 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 0.011322 0.006537 0.000000 0.00000 SCALE2 0.000000 0.013074 0.000000 0.00000 SCALE3 0.000000 0.000000 0.008649 0.00000 MASTER 314 0 1 5 0 0 3 6 0 0 0 24 END