3H6U - Header Asymmetric Unit

HEADER MEMBRANE PROTEIN 24-APR-09 3H6U

TITLE CRYSTAL STRUCTURE OF THE IGLUR2 LIGAND-BINDING CORE (S1S2J-N754S) IN TITLE 2 COMPLEX WITH GLUTAMATE AND NS1493 AT 1.85 A RESOLUTION

COMPND MOL_ID: 1; COMPND 2 MOLECULE: GLUTAMATE RECEPTOR 2; COMPND 3 CHAIN: A; COMPND 4 FRAGMENT: IGLUR2-FLOP LIGAND-BINDING CORE: UNP RESIDUES 413-796; COMPND 5 SYNONYM: GLUR-2, GLUR-B, GLUR-K2, GLUTAMATE RECEPTOR IONOTROPIC, AMPA COMPND 6 2, AMPA-SELECTIVE GLUTAMATE RECEPTOR 2; COMPND 7 ENGINEERED: YES; COMPND 8 MUTATION: YES

SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: RATTUS NORVEGICUS; SOURCE 3 ORGANISM_COMMON: RAT; SOURCE 4 ORGANISM_TAXID: 10116; SOURCE 5 GENE: GRIA2, GLUR2; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 8 EXPRESSION_SYSTEM_STRAIN: BL21(DE3); SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PET30B

KEYWDS AMPA RECEPTOR LIGAND-BIDNING CORE, IGLUR2 S1S2J-N754S, ALLOSTERIC KEYWDS 2 MODULATION, MEMBRANE PROTEIN

EXPDTA X-RAY DIFFRACTION

AUTHOR H.HALD,M.GAJHEDE,J.S.KASTRUP

REVDAT 3 13-JUL-11 3H6U 1 VERSN REVDAT 2 08-SEP-09 3H6U 1 JRNL REVDAT 1 28-JUL-09 3H6U 0

JRNL AUTH H.HALD,P.K.AHRING,D.B.TIMMERMANN,T.LILJEFORS,M.GAJHEDE, JRNL AUTH 2 J.S.KASTRUP JRNL TITL DISTINCT STRUCTURAL FEATURES OF CYCLOTHIAZIDE ARE JRNL TITL 2 RESPONSIBLE FOR EFFECTS ON PEAK CURRENT AMPLITUDE AND JRNL TITL 3 DESENSITIZATION KINETICS AT IGLUR2. JRNL REF J.MOL.BIOL. V. 391 906 2009 JRNL REFN ISSN 0022-2836 JRNL PMID 19591837 JRNL DOI 10.1016/J.JMB.2009.07.002

REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH N.ARMSTRONG,E.GOUAUX REMARK 1 TITL MECHANISMS FOR ACTIVATION AND ANTAGONISM OF AN REMARK 1 TITL 2 AMPA-SENSITIVE GLUTAMATE RECEPTOR: CRYSTAL STRUCTURES OF THE REMARK 1 TITL 3 GLUR2 LIGAND BINDING CORE. REMARK 1 REF NEURON V. 28 165 2000 REMARK 1 REFN ISSN 0896-6273 REMARK 1 PMID 11086992 REMARK 1 REFERENCE 2 REMARK 1 AUTH Y.SUN,R.OLSON,M.HORNING,N.ARMSTRONG,M.MAYER,E.GOUAUX REMARK 1 TITL MECHANISM OF GLUTAMATE RECEPTOR DESENSITIZATION. REMARK 1 REF NATURE V. 417 245 2002 REMARK 1 REFN ISSN 0028-0836 REMARK 1 PMID 12015593 REMARK 1 DOI 10.1038/417245A

REMARK 2 REMARK 2 RESOLUTION. 1.85 ANGSTROMS.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS 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) : 1.85 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 19.47 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 1343001.700 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 99.4 REMARK 3 NUMBER OF REFLECTIONS : 23457 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) : 0.181 REMARK 3 FREE R VALUE : 0.215 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.000 REMARK 3 FREE R VALUE TEST SET COUNT : 1177 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : 0.006 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 23 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 1.85 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.88 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 98.70 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 956 REMARK 3 BIN R VALUE (WORKING SET) : 0.2480 REMARK 3 BIN FREE R VALUE : 0.2600 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 4.00 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 40 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.041 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 2037 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 93 REMARK 3 SOLVENT ATOMS : 384 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 21.00 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 24.80 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : -11.13600 REMARK 3 B22 (A**2) : 4.68700 REMARK 3 B33 (A**2) : 6.44900 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) : 0.19 REMARK 3 ESD FROM SIGMAA (A) : 0.16 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) : 0.24 REMARK 3 ESD FROM C-V SIGMAA (A) : 0.19 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.005 REMARK 3 BOND ANGLES (DEGREES) : 1.21 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 21.90 REMARK 3 IMPROPER ANGLES (DEGREES) : 0.71 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) : 1.232 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 1.814 ; 2.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 2.111 ; 2.000 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 3.140 ; 2.500 REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : FLAT MODEL REMARK 3 KSOL : 0.34 REMARK 3 BSOL : 40.91 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 : CNS_TOPPAR:PROTEIN_REP.PARAM REMARK 3 PARAMETER FILE 2 : CNS_TOPPAR:WATER_REP.PARAM REMARK 3 PARAMETER FILE 3 : CNS_TOPPAR:ION.PARAM REMARK 3 PARAMETER FILE 4 : NS1493NOV_GOL2_CIT_DMS.PARAM REMARK 3 PARAMETER FILE 5 : NULL REMARK 3 TOPOLOGY FILE 1 : CNS_TOPPAR:PROTEIN.TOP REMARK 3 TOPOLOGY FILE 2 : CNS_TOPPAR:WATER.TOP REMARK 3 TOPOLOGY FILE 3 : CNS_TOPPAR:ION.TOP REMARK 3 TOPOLOGY FILE 4 : NS1493NOV_GOL2_CIT_DMS.TOP REMARK 3 TOPOLOGY FILE 5 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL

REMARK 4 REMARK 4 3H6U COMPLIES WITH FORMAT V. 3.30, 13-JUL-11

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 28-APR-09. REMARK 100 THE RCSB ID CODE IS RCSB052765.

REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 03-FEB-06 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 4.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : EMBL/DESY, HAMBURG REMARK 200 BEAMLINE : X11 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.8142 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD 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 : 24228 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.850 REMARK 200 RESOLUTION RANGE LOW (A) : 19.470 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 98.7 REMARK 200 DATA REDUNDANCY : 7.900 REMARK 200 R MERGE (I) : 0.05800 REMARK 200 R SYM (I) : NULL REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 33.1000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.85 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.92 REMARK 200 COMPLETENESS FOR SHELL (%) : 91.6 REMARK 200 DATA REDUNDANCY IN SHELL : 7.90 REMARK 200 R MERGE FOR SHELL (I) : 0.41900 REMARK 200 R SYM FOR SHELL (I) : 0.41900 REMARK 200 <I/SIGMA(I)> FOR SHELL : 5.200 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: DIFFERENCE FOURIER REMARK 200 SOFTWARE USED: REFMAC REMARK 200 STARTING MODEL: PDB ENTRY 1M5C REMARK 200 REMARK 200 REMARK: NULL

REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 46.40 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.29 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 25 % PEG 8000, 0.1 M LITHIUM SULFATE, REMARK 280 0.1 M PHOSPHATE-CITRATE PH 4.5, VAPOR DIFFUSION, HANGING DROP, REMARK 280 TEMPERATURE 279K

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 44.23100 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 32.04300 REMARK 290 SMTRY3 3 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 4 1.000000 0.000000 0.000000 44.23100 REMARK 290 SMTRY2 4 0.000000 -1.000000 0.000000 32.04300 REMARK 290 SMTRY3 4 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: DIMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 1950 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 23750 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -7.2 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 88.46200 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 SER A 263

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 310 DISTANCE = 5.84 ANGSTROMS REMARK 525 HOH A 320 DISTANCE = 5.55 ANGSTROMS REMARK 525 HOH A 331 DISTANCE = 6.39 ANGSTROMS REMARK 525 HOH A 376 DISTANCE = 5.25 ANGSTROMS REMARK 525 HOH A 377 DISTANCE = 5.95 ANGSTROMS REMARK 525 HOH A 542 DISTANCE = 5.98 ANGSTROMS

REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE GLU A 264 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NS3 A 265 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 266 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 267 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 268 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC6 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 269 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC7 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 270 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC8 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SO4 A 271 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC9 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE GOL A 272 REMARK 800 REMARK 800 SITE_IDENTIFIER: BC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE GOL A 273 REMARK 800 REMARK 800 SITE_IDENTIFIER: BC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE FLC A 274

REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1LBC RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF GLUR2 LIGAND BINDING CORE (S1S2J- REMARK 900 N775S) IN COMPLEX WITH GLUTAMATE AND CYCLOTHIAZIDE AT 1.80 REMARK 900 A RESOLUTION REMARK 900 RELATED ID: 3H6T RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF IGLUR2 LIGAND-BINDING CORE (S1S2J- REMARK 900 N754S) IN COMPLEX WITH GLUTAMATE AND CYCLOTHIAZIDE AT 2.25 REMARK 900 A RESOLUTION REMARK 900 RELATED ID: 3H6V RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF IGLUR2 LIGAND-BINDING CORE (S1S2J- REMARK 900 N754S) IN COMPLEX WITH GLUTAMATE AND NS5206 AT 2.10 A REMARK 900 RESOLUTION REMARK 900 RELATED ID: 3H6W RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF IGLUR2 LIGAND-BINDING CORE (S1S2J- REMARK 900 N754S) IN COMPLEX WITH GLUTAMATE AND NS5217 AT 1.50 A REMARK 900 RESOLUTION

REMARK 999 REMARK 999 SEQUENCE REMARK 999 NATIVE IGLUR2 IS A MEMBRANE PROTEIN. THE PROTEIN REMARK 999 CRYSTALLIZED IS THE EXTRACELLULAR LIGAND-BINDING CORE REMARK 999 OF GLUR2. TRANSMEMBRANE REGIONS WERE GENETICALLY REMOVED REMARK 999 AND REPLACED WITH A GLY-THR LINKER (RESIDUES 118-119). REMARK 999 THEREFORE THE SEQUENCE MATCHES DISCONTINUOUSLY WITH THE REMARK 999 REFERENCE DATABASE (UNP RESIDUES 413-527 AND 653-796, REMARK 999 NUMBERING WITH SIGNAL PEPTIDE OF 21 AMINO ACIDS). REMARK 999 THE TWO FIRST RESIDUES (GLY, ALA) ARE CLONING REMNANTS.

DBREF 3H6U A 3 117 UNP P19491 GRIA2_RAT 413 527 DBREF 3H6U A 120 263 UNP P19491 GRIA2_RAT 653 796

SEQADV 3H6U GLY A 1 UNP P19491 EXPRESSION TAG SEQADV 3H6U ALA A 2 UNP P19491 EXPRESSION TAG SEQADV 3H6U GLY A 118 UNP P19491 LINKER SEQADV 3H6U THR A 119 UNP P19491 LINKER SEQADV 3H6U SER A 242 UNP P19491 ASN 775 ENGINEERED

SEQRES 1 A 263 GLY ALA ASN LYS THR VAL VAL VAL THR THR ILE LEU GLU SEQRES 2 A 263 SER PRO TYR VAL MET MET LYS LYS ASN HIS GLU MET LEU SEQRES 3 A 263 GLU GLY ASN GLU ARG TYR GLU GLY TYR CYS VAL ASP LEU SEQRES 4 A 263 ALA ALA GLU ILE ALA LYS HIS CYS GLY PHE LYS TYR LYS SEQRES 5 A 263 LEU THR ILE VAL GLY ASP GLY LYS TYR GLY ALA ARG ASP SEQRES 6 A 263 ALA ASP THR LYS ILE TRP ASN GLY MET VAL GLY GLU LEU SEQRES 7 A 263 VAL TYR GLY LYS ALA ASP ILE ALA ILE ALA PRO LEU THR SEQRES 8 A 263 ILE THR LEU VAL ARG GLU GLU VAL ILE ASP PHE SER LYS SEQRES 9 A 263 PRO PHE MET SER LEU GLY ILE SER ILE MET ILE LYS LYS SEQRES 10 A 263 GLY THR PRO ILE GLU SER ALA GLU ASP LEU SER LYS GLN SEQRES 11 A 263 THR GLU ILE ALA TYR GLY THR LEU ASP SER GLY SER THR SEQRES 12 A 263 LYS GLU PHE PHE ARG ARG SER LYS ILE ALA VAL PHE ASP SEQRES 13 A 263 LYS MET TRP THR TYR MET ARG SER ALA GLU PRO SER VAL SEQRES 14 A 263 PHE VAL ARG THR THR ALA GLU GLY VAL ALA ARG VAL ARG SEQRES 15 A 263 LYS SER LYS GLY LYS TYR ALA TYR LEU LEU GLU SER THR SEQRES 16 A 263 MET ASN GLU TYR ILE GLU GLN ARG LYS PRO CYS ASP THR SEQRES 17 A 263 MET LYS VAL GLY GLY ASN LEU ASP SER LYS GLY TYR GLY SEQRES 18 A 263 ILE ALA THR PRO LYS GLY SER SER LEU GLY ASN ALA VAL SEQRES 19 A 263 ASN LEU ALA VAL LEU LYS LEU SER GLU GLN GLY LEU LEU SEQRES 20 A 263 ASP LYS LEU LYS ASN LYS TRP TRP TYR ASP LYS GLY GLU SEQRES 21 A 263 CYS GLY SER

HET GLU A 264 10 HET NS3 A 265 28 HET SO4 A 266 5 HET SO4 A 267 5 HET SO4 A 268 5 HET SO4 A 269 5 HET SO4 A 270 5 HET SO4 A 271 5 HET GOL A 272 6 HET GOL A 273 6 HET FLC A 274 13

HETNAM GLU GLUTAMIC ACID HETNAM NS3 (3S)-3-CYCLOPENTYL-6-METHYL-7-[(4-METHYLPIPERAZIN-1- HETNAM 2 NS3 YL)SULFONYL]-3,4-DIHYDRO-2H-1,2,4-BENZOTHIADIAZINE 1, HETNAM 3 NS3 1-DIOXIDE HETNAM SO4 SULFATE ION HETNAM GOL GLYCEROL HETNAM FLC CITRATE ANION

HETSYN GOL GLYCERIN; PROPANE-1,2,3-TRIOL

FORMUL 2 GLU C5 H9 N O4 FORMUL 3 NS3 C18 H28 N4 O4 S2 FORMUL 4 SO4 6(O4 S 2-) FORMUL 10 GOL 2(C3 H8 O3) FORMUL 12 FLC C6 H5 O7 3- FORMUL 13 HOH *384(H2 O)

HELIX 1 1 ASN A 22 LEU A 26 5 5 HELIX 2 2 GLU A 27 GLU A 30 5 4 HELIX 3 3 GLY A 34 GLY A 48 1 15 HELIX 4 4 ASN A 72 TYR A 80 1 9 HELIX 5 5 THR A 93 GLU A 98 1 6 HELIX 6 6 SER A 123 LYS A 129 1 7 HELIX 7 7 GLY A 141 SER A 150 1 10 HELIX 8 8 ILE A 152 ALA A 165 1 14 HELIX 9 9 THR A 173 SER A 184 1 12 HELIX 10 10 SER A 194 GLN A 202 1 9 HELIX 11 11 LEU A 230 GLN A 244 1 15 HELIX 12 12 GLY A 245 TYR A 256 1 12

SHEET 1 A 3 TYR A 51 ILE A 55 0 SHEET 2 A 3 VAL A 6 THR A 10 1 N VAL A 8 O LYS A 52 SHEET 3 A 3 ILE A 85 ALA A 86 1 O ILE A 85 N THR A 9 SHEET 1 B 2 MET A 18 MET A 19 0 SHEET 2 B 2 TYR A 32 GLU A 33 -1 O GLU A 33 N MET A 18 SHEET 1 C 2 ILE A 100 PHE A 102 0 SHEET 2 C 2 ALA A 223 PRO A 225 -1 O THR A 224 N ASP A 101 SHEET 1 D 2 MET A 107 LEU A 109 0 SHEET 2 D 2 LYS A 218 TYR A 220 -1 O LYS A 218 N LEU A 109 SHEET 1 E 4 ALA A 134 GLY A 136 0 SHEET 2 E 4 TYR A 188 GLU A 193 1 O LEU A 191 N GLY A 136 SHEET 3 E 4 ILE A 111 LYS A 116 -1 N MET A 114 O TYR A 190 SHEET 4 E 4 THR A 208 VAL A 211 -1 O MET A 209 N ILE A 115

SSBOND 1 CYS A 206 CYS A 261 1555 1555 2.03

CISPEP 1 SER A 14 PRO A 15 0 -0.07 CISPEP 2 GLU A 166 PRO A 167 0 -0.14 CISPEP 3 LYS A 204 PRO A 205 0 0.36

SITE 1 AC1 13 TYR A 61 PRO A 89 LEU A 90 THR A 91 SITE 2 AC1 13 ARG A 96 GLY A 141 SER A 142 THR A 143 SITE 3 AC1 13 GLU A 193 TYR A 220 HOH A 388 HOH A 438 SITE 4 AC1 13 HOH A 479 SITE 1 AC2 12 ILE A 92 PRO A 105 MET A 107 SER A 108 SITE 2 AC2 12 SER A 217 GLY A 219 SER A 242 ASP A 248 SITE 3 AC2 12 HOH A 410 HOH A 516 HOH A 548 HOH A 637 SITE 1 AC3 8 ARG A 31 HIS A 46 LYS A 240 GLN A 244 SITE 2 AC3 8 GOL A 273 HOH A 525 HOH A 579 HOH A 581 SITE 1 AC4 8 ASP A 139 SER A 140 LYS A 144 ARG A 148 SITE 2 AC4 8 HOH A 411 HOH A 457 HOH A 593 HOH A 604 SITE 1 AC5 8 GLU A 27 GLY A 28 ASN A 29 GLU A 30 SITE 2 AC5 8 ARG A 149 FLC A 274 HOH A 349 HOH A 612 SITE 1 AC6 7 ASN A 22 LEU A 26 ARG A 64 LYS A 69 SITE 2 AC6 7 HOH A 526 HOH A 626 HOH A 647 SITE 1 AC7 2 LYS A 82 LYS A 116 SITE 1 AC8 6 SER A 194 GLU A 198 ASN A 214 HOH A 277 SITE 2 AC8 6 HOH A 508 HOH A 601 SITE 1 AC9 4 GLU A 33 TRP A 254 LYS A 258 HOH A 412 SITE 1 BC1 9 GLU A 42 LYS A 45 HIS A 46 LEU A 241 SITE 2 BC1 9 GLN A 244 SO4 A 266 HOH A 525 HOH A 546 SITE 3 BC1 9 HOH A 631 SITE 1 BC2 5 ARG A 148 ARG A 149 TRP A 159 ARG A 163 SITE 2 BC2 5 SO4 A 268

CRYST1 88.462 64.086 47.272 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 0.011304 0.000000 0.000000 0.00000

SCALE2 0.000000 0.015604 0.000000 0.00000

SCALE3 0.000000 0.000000 0.021154 0.00000