1Z7G - Header Asymmetric Unit

HEADER TRANSFERASE 24-MAR-05 1Z7G

TITLE FREE HUMAN HGPRT

COMPND MOL_ID: 1; COMPND 2 MOLECULE: HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE; COMPND 3 CHAIN: A, B, C, D; COMPND 4 SYNONYM: HGPRT, HGPRTASE; COMPND 5 EC: 2.4.2.8; COMPND 6 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: HPRT1, HPRT; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: S 606; SOURCE 9 EXPRESSION_SYSTEM_PLASMID: PHTM

KEYWDS FLEXIBILITY, TRANS CIS PEPTIDE BOND ISOMERIZATION, KEYWDS 2 NUCLEOTIDE BINDING, TRANSFERASE

EXPDTA X-RAY DIFFRACTION

AUTHOR D.T.KEOUGH,I.M.BRERETON,J.DE JERSEY,L.W.GUDDAT

REVDAT 2 24-FEB-09 1Z7G 1 VERSN REVDAT 1 02-AUG-05 1Z7G 0

JRNL AUTH D.T.KEOUGH,I.M.BRERETON,J.DE JERSEY,L.W.GUDDAT JRNL TITL THE CRYSTAL STRUCTURE OF FREE HUMAN JRNL TITL 2 HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE JRNL TITL 3 REVEALS EXTENSIVE CONFORMATIONAL PLASTICITY JRNL TITL 4 THROUGHOUT THE CATALYTIC CYCLE JRNL REF J.MOL.BIOL. V. 351 170 2005 JRNL REFN ISSN 0022-2836 JRNL PMID 15990111 JRNL DOI 10.1016/J.JMB.2005.05.061

REMARK 1

REMARK 2 REMARK 2 RESOLUTION. 1.90 ANGSTROMS.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS 1.0 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) : 1.90 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 46.30 REMARK 3 DATA CUTOFF (SIGMA(F)) : 1.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : NULL REMARK 3 DATA CUTOFF LOW (ABS(F)) : NULL REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 95.3 REMARK 3 NUMBER OF REFLECTIONS : 64112 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) : 0.213 REMARK 3 FREE R VALUE : 0.254 REMARK 3 FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 FREE R VALUE TEST SET COUNT : 6505 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) : 1.90 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.97 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 72.50 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : NULL REMARK 3 BIN R VALUE (WORKING SET) : 0.2940 REMARK 3 BIN FREE R VALUE : 0.3280 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : NULL REMARK 3 BIN FREE R VALUE TEST SET COUNT : 517 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.034 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 6273 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 0 REMARK 3 SOLVENT ATOMS : 504 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 59.11 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) : 1.560 REMARK 3 BOND ANGLES (DEGREES) : NULL REMARK 3 DIHEDRAL ANGLES (DEGREES) : NULL REMARK 3 IMPROPER ANGLES (DEGREES) : NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : ISOTROPIC 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) : 2.500 ; NULL REMARK 3 SIDE-CHAIN BOND (A**2) : NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE (A**2) : NULL ; NULL REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : NULL REMARK 3 KSOL : NULL REMARK 3 BSOL : 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 : PROTEIN_REP.PARAM REMARK 3 PARAMETER FILE 2 : WATER_REP.PARAM REMARK 3 PARAMETER FILE 3 : ION.PARAM REMARK 3 PARAMETER FILE 4 : CARBOHYDRATE.PARAM REMARK 3 PARAMETER FILE 5 : 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 : CARBOHYDRATE.TOP REMARK 3 TOPOLOGY FILE 5 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL

REMARK 4 REMARK 4 1Z7G COMPLIES WITH FORMAT V. 3.15, 01-DEC-08

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 06-APR-05. REMARK 100 THE RCSB ID CODE IS RCSB032393.

REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 03-JUN-03 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 4.6 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 FR-E REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.5418 REMARK 200 MONOCHROMATOR : SINGLE WAVELENGTH REMARK 200 OPTICS : OSMIC REMARK 200 REMARK 200 DETECTOR TYPE : IMAGE PLATE REMARK 200 DETECTOR MANUFACTURER : RIGAKU RAXIS IV REMARK 200 INTENSITY-INTEGRATION SOFTWARE : CRYSTALCLEAR V. 1.35 (MSC/ REMARK 200 RIGAKU) REMARK 200 DATA SCALING SOFTWARE : CRYSTALCLEAR V. 1.35 (MSC/ REMARK 200 RIGAKU) REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 66957 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.900 REMARK 200 RESOLUTION RANGE LOW (A) : 46.300 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 95.6 REMARK 200 DATA REDUNDANCY : 2.500 REMARK 200 R MERGE (I) : 0.06200 REMARK 200 R SYM (I) : 0.06200 REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 12.3000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.90 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.97 REMARK 200 COMPLETENESS FOR SHELL (%) : 79.3 REMARK 200 DATA REDUNDANCY IN SHELL : 1.70 REMARK 200 R MERGE FOR SHELL (I) : 0.28800 REMARK 200 R SYM FOR SHELL (I) : 0.28800 REMARK 200 <I/SIGMA(I)> FOR SHELL : 2.200 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: CNS REMARK 200 STARTING MODEL: PDB ENTRY 1HMP REMARK 200 REMARK 200 REMARK: NULL

REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 39.10 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.10 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 0.2 M AMMONIUM ACETATE, 0.1 M REMARK 280 SODIUM ACETATE, 30% PEG4000, PH 4.6, VAPOR DIFFUSION, HANGING REMARK 280 DROP, TEMPERATURE 291K

REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 1 2 1 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 74.78500 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 25.90000 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 4 -1.000000 0.000000 0.000000 74.78500 REMARK 290 SMTRY2 4 0.000000 1.000000 0.000000 25.90000 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 300 REMARK: THE BIOLOGICAL UNIT IS A TETRAMER. THE ASYMMETRIC UNIT REMARK 300 CONSISTS OF TWO SEPERATE DIMERS. TETRAMERS ARE GENERATED BY REMARK 300 CRYSTALLOGRAPHIC TWO FOLD AXES OF SYMMETRY.

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: A, B 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 -149.57000 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 350 REMARK 350 BIOMOLECULE: 2 REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: TETRAMERIC REMARK 350 APPLY THE FOLLOWING TO CHAINS: 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 350 BIOMT1 2 -1.000000 0.000000 0.000000 -31.99837 REMARK 350 BIOMT2 2 0.000000 1.000000 0.000000 0.00000 REMARK 350 BIOMT3 2 0.000000 0.000000 -1.000000 113.07986

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 1 REMARK 465 THR A 2 REMARK 465 ARG A 3 REMARK 465 SER A 103 REMARK 465 TYR A 104 REMARK 465 CYS A 105 REMARK 465 ASN A 106 REMARK 465 ASP A 107 REMARK 465 GLN A 108 REMARK 465 SER A 109 REMARK 465 THR A 110 REMARK 465 GLY A 111 REMARK 465 ASP A 112 REMARK 465 PRO A 168 REMARK 465 ARG A 169 REMARK 465 SER A 170 REMARK 465 VAL A 171 REMARK 465 GLY A 172 REMARK 465 ALA B 1 REMARK 465 THR B 2 REMARK 465 ARG B 3 REMARK 465 LYS B 102 REMARK 465 SER B 103 REMARK 465 TYR B 104 REMARK 465 CYS B 105 REMARK 465 ASN B 106 REMARK 465 ASP B 107 REMARK 465 GLN B 108 REMARK 465 SER B 109 REMARK 465 THR B 110 REMARK 465 GLY B 111 REMARK 465 ASP B 112 REMARK 465 GLY B 117 REMARK 465 GLY B 118 REMARK 465 ASP B 119 REMARK 465 ASP B 120 REMARK 465 ALA C 1 REMARK 465 THR C 2 REMARK 465 ARG C 3 REMARK 465 SER C 103 REMARK 465 TYR C 104 REMARK 465 CYS C 105 REMARK 465 ASN C 106 REMARK 465 ASP C 107 REMARK 465 GLN C 108 REMARK 465 SER C 109 REMARK 465 THR C 110 REMARK 465 GLY C 111 REMARK 465 ASP C 112 REMARK 465 ALA D 1 REMARK 465 THR D 2 REMARK 465 ARG D 3 REMARK 465 TYR D 104 REMARK 465 CYS D 105 REMARK 465 ASN D 106 REMARK 465 ASP D 107 REMARK 465 GLN D 108 REMARK 465 SER D 109 REMARK 465 THR D 110 REMARK 465 GLY D 118 REMARK 465 ASP D 119 REMARK 465 ASP D 120 REMARK 465 SER D 170 REMARK 465 VAL D 171

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 CYS A 22 SG REMARK 470 LYS A 102 CG CD CE NZ REMARK 470 ILE A 113 CG1 CG2 CD1 REMARK 470 LYS A 114 CG CD CE NZ REMARK 470 LYS A 140 CG CD CE NZ REMARK 470 LYS A 155 CG CD CE NZ REMARK 470 THR A 167 OG1 CG2 REMARK 470 CYS A 205 SG REMARK 470 LYS A 216 CG CD CE NZ REMARK 470 CYS B 22 SG REMARK 470 ILE B 113 CG1 CG2 CD1 REMARK 470 LEU B 121 CB CG CD1 CD2 REMARK 470 LYS B 140 CG CD CE NZ REMARK 470 LYS B 155 CG CD CE NZ REMARK 470 ARG B 169 CG CD NE CZ NH1 NH2 REMARK 470 CYS B 205 SG REMARK 470 LYS B 216 CG CD CE NZ REMARK 470 CYS C 22 SG REMARK 470 ARG C 100 CG CD NE CZ NH1 NH2 REMARK 470 LYS C 102 CG CD CE NZ REMARK 470 ILE C 113 CB CG1 CG2 CD1 REMARK 470 LYS C 140 CG CD CE NZ REMARK 470 ARG C 169 CG CD NE CZ NH1 NH2 REMARK 470 CYS C 205 SG REMARK 470 LYS C 216 CG CD CE NZ REMARK 470 CYS D 22 SG REMARK 470 LYS D 102 CG CD CE NZ REMARK 470 ASP D 112 CG OD1 OD2 REMARK 470 ILE D 113 CG1 CG2 CD1 REMARK 470 LYS D 140 CG CD CE NZ REMARK 470 ARG D 150 CG CD NE CZ NH1 NH2 REMARK 470 LYS D 155 CG CD CE NZ REMARK 470 ARG D 169 CG CD NE CZ NH1 NH2 REMARK 470 LYS D 174 CG CD CE NZ REMARK 470 CYS D 205 SG REMARK 470 LYS D 216 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 TYR A 190 -66.60 64.61 REMARK 500 ALA A 191 17.20 -144.50 REMARK 500 SER B 122 88.22 -68.73 REMARK 500 THR B 123 45.94 -107.72 REMARK 500 LEU B 124 24.92 -76.35 REMARK 500 THR B 138 159.68 -45.37 REMARK 500 ARG B 169 -158.45 -72.69 REMARK 500 TYR B 190 -70.78 64.87 REMARK 500 ALA B 191 26.99 -142.74 REMARK 500 HIS C 60 109.96 -53.88 REMARK 500 ILE C 116 -80.62 -93.57 REMARK 500 ASP C 137 -63.15 -107.84 REMARK 500 TYR C 190 -68.65 64.29 REMARK 500 ALA C 191 18.64 -140.54 REMARK 500 TYR D 190 -67.50 66.19 REMARK 500 ALA D 191 24.90 -146.51 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 D2312 DISTANCE = 5.34 ANGSTROMS REMARK 525 HOH D2555 DISTANCE = 5.34 ANGSTROMS REMARK 525 HOH B2565 DISTANCE = 5.51 ANGSTROMS

REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1HMP RELATED DB: PDB REMARK 900 SAME PROTEIN IN COMPLEX WITH GMP REMARK 900 RELATED ID: 1D6N RELATED DB: PDB REMARK 900 SAME PROTEIN IN COMPLEX WITH HPP, MG2+ AND PRPP REMARK 900 RELATED ID: 1BZY RELATED DB: PDB REMARK 900 SAME PROTEIN IN COMPLEX WITH IMMUCILLINGP, MG2+ AND PPI

DBREF 1Z7G A 1 217 UNP P00492 HPRT_HUMAN 1 217 DBREF 1Z7G B 1 217 UNP P00492 HPRT_HUMAN 1 217 DBREF 1Z7G C 1 217 UNP P00492 HPRT_HUMAN 1 217 DBREF 1Z7G D 1 217 UNP P00492 HPRT_HUMAN 1 217

SEQRES 1 A 217 ALA THR ARG SER PRO GLY VAL VAL ILE SER ASP ASP GLU SEQRES 2 A 217 PRO GLY TYR ASP LEU ASP LEU PHE CYS ILE PRO ASN HIS SEQRES 3 A 217 TYR ALA GLU ASP LEU GLU ARG VAL PHE ILE PRO HIS GLY SEQRES 4 A 217 LEU ILE MET ASP ARG THR GLU ARG LEU ALA ARG ASP VAL SEQRES 5 A 217 MET LYS GLU MET GLY GLY HIS HIS ILE VAL ALA LEU CYS SEQRES 6 A 217 VAL LEU LYS GLY GLY TYR LYS PHE PHE ALA ASP LEU LEU SEQRES 7 A 217 ASP TYR ILE LYS ALA LEU ASN ARG ASN SER ASP ARG SER SEQRES 8 A 217 ILE PRO MET THR VAL ASP PHE ILE ARG LEU LYS SER TYR SEQRES 9 A 217 CYS ASN ASP GLN SER THR GLY ASP ILE LYS VAL ILE GLY SEQRES 10 A 217 GLY ASP ASP LEU SER THR LEU THR GLY LYS ASN VAL LEU SEQRES 11 A 217 ILE VAL GLU ASP ILE ILE ASP THR GLY LYS THR MET GLN SEQRES 12 A 217 THR LEU LEU SER LEU VAL ARG GLN TYR ASN PRO LYS MET SEQRES 13 A 217 VAL LYS VAL ALA SER LEU LEU VAL LYS ARG THR PRO ARG SEQRES 14 A 217 SER VAL GLY TYR LYS PRO ASP PHE VAL GLY PHE GLU ILE SEQRES 15 A 217 PRO ASP LYS PHE VAL VAL GLY TYR ALA LEU ASP TYR ASN SEQRES 16 A 217 GLU TYR PHE ARG ASP LEU ASN HIS VAL CYS VAL ILE SER SEQRES 17 A 217 GLU THR GLY LYS ALA LYS TYR LYS ALA SEQRES 1 B 217 ALA THR ARG SER PRO GLY VAL VAL ILE SER ASP ASP GLU SEQRES 2 B 217 PRO GLY TYR ASP LEU ASP LEU PHE CYS ILE PRO ASN HIS SEQRES 3 B 217 TYR ALA GLU ASP LEU GLU ARG VAL PHE ILE PRO HIS GLY SEQRES 4 B 217 LEU ILE MET ASP ARG THR GLU ARG LEU ALA ARG ASP VAL SEQRES 5 B 217 MET LYS GLU MET GLY GLY HIS HIS ILE VAL ALA LEU CYS SEQRES 6 B 217 VAL LEU LYS GLY GLY TYR LYS PHE PHE ALA ASP LEU LEU SEQRES 7 B 217 ASP TYR ILE LYS ALA LEU ASN ARG ASN SER ASP ARG SER SEQRES 8 B 217 ILE PRO MET THR VAL ASP PHE ILE ARG LEU LYS SER TYR SEQRES 9 B 217 CYS ASN ASP GLN SER THR GLY ASP ILE LYS VAL ILE GLY SEQRES 10 B 217 GLY ASP ASP LEU SER THR LEU THR GLY LYS ASN VAL LEU SEQRES 11 B 217 ILE VAL GLU ASP ILE ILE ASP THR GLY LYS THR MET GLN SEQRES 12 B 217 THR LEU LEU SER LEU VAL ARG GLN TYR ASN PRO LYS MET SEQRES 13 B 217 VAL LYS VAL ALA SER LEU LEU VAL LYS ARG THR PRO ARG SEQRES 14 B 217 SER VAL GLY TYR LYS PRO ASP PHE VAL GLY PHE GLU ILE SEQRES 15 B 217 PRO ASP LYS PHE VAL VAL GLY TYR ALA LEU ASP TYR ASN SEQRES 16 B 217 GLU TYR PHE ARG ASP LEU ASN HIS VAL CYS VAL ILE SER SEQRES 17 B 217 GLU THR GLY LYS ALA LYS TYR LYS ALA SEQRES 1 C 217 ALA THR ARG SER PRO GLY VAL VAL ILE SER ASP ASP GLU SEQRES 2 C 217 PRO GLY TYR ASP LEU ASP LEU PHE CYS ILE PRO ASN HIS SEQRES 3 C 217 TYR ALA GLU ASP LEU GLU ARG VAL PHE ILE PRO HIS GLY SEQRES 4 C 217 LEU ILE MET ASP ARG THR GLU ARG LEU ALA ARG ASP VAL SEQRES 5 C 217 MET LYS GLU MET GLY GLY HIS HIS ILE VAL ALA LEU CYS SEQRES 6 C 217 VAL LEU LYS GLY GLY TYR LYS PHE PHE ALA ASP LEU LEU SEQRES 7 C 217 ASP TYR ILE LYS ALA LEU ASN ARG ASN SER ASP ARG SER SEQRES 8 C 217 ILE PRO MET THR VAL ASP PHE ILE ARG LEU LYS SER TYR SEQRES 9 C 217 CYS ASN ASP GLN SER THR GLY ASP ILE LYS VAL ILE GLY SEQRES 10 C 217 GLY ASP ASP LEU SER THR LEU THR GLY LYS ASN VAL LEU SEQRES 11 C 217 ILE VAL GLU ASP ILE ILE ASP THR GLY LYS THR MET GLN SEQRES 12 C 217 THR LEU LEU SER LEU VAL ARG GLN TYR ASN PRO LYS MET SEQRES 13 C 217 VAL LYS VAL ALA SER LEU LEU VAL LYS ARG THR PRO ARG SEQRES 14 C 217 SER VAL GLY TYR LYS PRO ASP PHE VAL GLY PHE GLU ILE SEQRES 15 C 217 PRO ASP LYS PHE VAL VAL GLY TYR ALA LEU ASP TYR ASN SEQRES 16 C 217 GLU TYR PHE ARG ASP LEU ASN HIS VAL CYS VAL ILE SER SEQRES 17 C 217 GLU THR GLY LYS ALA LYS TYR LYS ALA SEQRES 1 D 217 ALA THR ARG SER PRO GLY VAL VAL ILE SER ASP ASP GLU SEQRES 2 D 217 PRO GLY TYR ASP LEU ASP LEU PHE CYS ILE PRO ASN HIS SEQRES 3 D 217 TYR ALA GLU ASP LEU GLU ARG VAL PHE ILE PRO HIS GLY SEQRES 4 D 217 LEU ILE MET ASP ARG THR GLU ARG LEU ALA ARG ASP VAL SEQRES 5 D 217 MET LYS GLU MET GLY GLY HIS HIS ILE VAL ALA LEU CYS SEQRES 6 D 217 VAL LEU LYS GLY GLY TYR LYS PHE PHE ALA ASP LEU LEU SEQRES 7 D 217 ASP TYR ILE LYS ALA LEU ASN ARG ASN SER ASP ARG SER SEQRES 8 D 217 ILE PRO MET THR VAL ASP PHE ILE ARG LEU LYS SER TYR SEQRES 9 D 217 CYS ASN ASP GLN SER THR GLY ASP ILE LYS VAL ILE GLY SEQRES 10 D 217 GLY ASP ASP LEU SER THR LEU THR GLY LYS ASN VAL LEU SEQRES 11 D 217 ILE VAL GLU ASP ILE ILE ASP THR GLY LYS THR MET GLN SEQRES 12 D 217 THR LEU LEU SER LEU VAL ARG GLN TYR ASN PRO LYS MET SEQRES 13 D 217 VAL LYS VAL ALA SER LEU LEU VAL LYS ARG THR PRO ARG SEQRES 14 D 217 SER VAL GLY TYR LYS PRO ASP PHE VAL GLY PHE GLU ILE SEQRES 15 D 217 PRO ASP LYS PHE VAL VAL GLY TYR ALA LEU ASP TYR ASN SEQRES 16 D 217 GLU TYR PHE ARG ASP LEU ASN HIS VAL CYS VAL ILE SER SEQRES 17 D 217 GLU THR GLY LYS ALA LYS TYR LYS ALA

FORMUL 5 HOH *504(H2 O)

HELIX 1 1 ASP A 17 PHE A 21 5 5 HELIX 2 2 PRO A 24 ALA A 28 5 5 HELIX 3 3 PRO A 37 GLY A 57 1 21 HELIX 4 4 TYR A 71 ARG A 86 1 16 HELIX 5 5 ASP A 120 THR A 125 5 6 HELIX 6 6 THR A 138 GLN A 151 1 14 HELIX 7 7 SER A 208 LYS A 216 1 9 HELIX 8 8 ASP B 17 PHE B 21 5 5 HELIX 9 9 PRO B 24 ALA B 28 5 5 HELIX 10 10 PRO B 37 GLY B 57 1 21 HELIX 11 11 TYR B 71 ARG B 86 1 16 HELIX 12 12 THR B 138 GLN B 151 1 14 HELIX 13 13 SER B 208 TYR B 215 1 8 HELIX 14 14 ASP C 17 PHE C 21 5 5 HELIX 15 15 PRO C 24 ALA C 28 5 5 HELIX 16 16 PRO C 37 GLY C 57 1 21 HELIX 17 17 TYR C 71 ARG C 86 1 16 HELIX 18 18 ASP C 120 THR C 125 5 6 HELIX 19 19 GLY C 139 GLN C 151 1 13 HELIX 20 20 SER C 208 LYS C 216 1 9 HELIX 21 21 ASP D 17 PHE D 21 5 5 HELIX 22 22 PRO D 24 ALA D 28 5 5 HELIX 23 23 PRO D 37 GLY D 57 1 21 HELIX 24 24 TYR D 71 ARG D 86 1 16 HELIX 25 25 LEU D 121 THR D 125 5 5 HELIX 26 26 THR D 138 GLN D 151 1 14 HELIX 27 27 SER D 208 LYS D 216 1 9

SHEET 1 A 6 VAL A 7 VAL A 8 0 SHEET 2 A 6 PHE A 177 ILE A 182 1 O GLU A 181 N VAL A 7 SHEET 3 A 6 MET A 156 LYS A 165 1 N LEU A 162 O PHE A 180 SHEET 4 A 6 ASN A 128 ILE A 135 1 N ILE A 131 O ALA A 160 SHEET 5 A 6 ILE A 61 VAL A 66 1 N LEU A 64 O VAL A 132 SHEET 6 A 6 MET A 94 ILE A 99 1 O THR A 95 N ALA A 63 SHEET 1 B 3 LEU A 31 ILE A 36 0 SHEET 2 B 3 VAL A 204 ILE A 207 -1 O VAL A 206 N GLU A 32 SHEET 3 B 3 VAL A 187 VAL A 188 -1 N VAL A 188 O CYS A 205 SHEET 1 C 6 VAL B 7 VAL B 8 0 SHEET 2 C 6 PHE B 177 ILE B 182 1 O GLU B 181 N VAL B 7 SHEET 3 C 6 MET B 156 LYS B 165 1 N LEU B 162 O PHE B 180 SHEET 4 C 6 ASN B 128 ILE B 135 1 N ILE B 131 O LYS B 158 SHEET 5 C 6 ILE B 61 VAL B 66 1 N LEU B 64 O LEU B 130 SHEET 6 C 6 MET B 94 ILE B 99 1 O THR B 95 N ALA B 63 SHEET 1 D 3 LEU B 31 ILE B 36 0 SHEET 2 D 3 VAL B 204 ILE B 207 -1 O VAL B 206 N GLU B 32 SHEET 3 D 3 VAL B 187 VAL B 188 -1 N VAL B 188 O CYS B 205 SHEET 1 E 6 VAL C 7 VAL C 8 0 SHEET 2 E 6 PHE C 177 ILE C 182 1 O GLU C 181 N VAL C 7 SHEET 3 E 6 MET C 156 LYS C 165 1 N SER C 161 O PHE C 177 SHEET 4 E 6 ASN C 128 ILE C 136 1 N ILE C 131 O LYS C 158 SHEET 5 E 6 ILE C 61 VAL C 66 1 N VAL C 62 O LEU C 130 SHEET 6 E 6 MET C 94 ILE C 99 1 O THR C 95 N ALA C 63 SHEET 1 F 3 LEU C 31 ILE C 36 0 SHEET 2 F 3 VAL C 204 ILE C 207 -1 O VAL C 206 N GLU C 32 SHEET 3 F 3 VAL C 187 VAL C 188 -1 N VAL C 188 O CYS C 205 SHEET 1 G 7 VAL D 7 VAL D 8 0 SHEET 2 G 7 PHE D 177 ILE D 182 1 O GLU D 181 N VAL D 7 SHEET 3 G 7 MET D 156 LYS D 165 1 N LEU D 162 O PHE D 180 SHEET 4 G 7 ASN D 128 ILE D 135 1 N ILE D 131 O ALA D 160 SHEET 5 G 7 ILE D 61 VAL D 66 1 N LEU D 64 O LEU D 130 SHEET 6 G 7 MET D 94 LYS D 102 1 O THR D 95 N ALA D 63 SHEET 7 G 7 LYS D 114 ILE D 116 -1 O LYS D 114 N LYS D 102 SHEET 1 H 3 LEU D 31 ILE D 36 0 SHEET 2 H 3 VAL D 204 ILE D 207 -1 O VAL D 206 N GLU D 32 SHEET 3 H 3 VAL D 187 VAL D 188 -1 N VAL D 188 O CYS D 205

CRYST1 149.570 51.800 117.520 90.00 105.80 90.00 C 1 2 1 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 0.006686 0.000000 0.001892 0.00000

SCALE2 0.000000 0.019305 0.000000 0.00000

SCALE3 0.000000 0.000000 0.008843 0.00000