3G3G - Header Asymmetric Unit

HEADER MEMBRANE PROTEIN 02-FEB-09 3G3G

TITLE CRYSTAL STRUCTURE OF THE GLUR6 LIGAND BINDING DOMAIN DIMER TITLE 2 K665R MUTANT WITH GLUTAMATE AND NACL AT 1.3 ANGSTROM TITLE 3 RESOLUTION

COMPND MOL_ID: 1; COMPND 2 MOLECULE: GLUTAMATE RECEPTOR, IONOTROPIC KAINATE 2; COMPND 3 CHAIN: A, B; COMPND 4 FRAGMENT: RESIDUES 429-544, 667-806; COMPND 5 SYNONYM: GLUTAMATE RECEPTOR 6, GLUR-6, GLUR6; COMPND 6 ENGINEERED: YES; COMPND 7 MUTATION: YES

SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: RATTUS NORVEGICUS; SOURCE 3 ORGANISM_TAXID: 10116; SOURCE 4 GENE: GRIK2; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 7 EXPRESSION_SYSTEM_STRAIN: ORIGAMIB (DE3); SOURCE 8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 9 EXPRESSION_SYSTEM_PLASMID: PET22B MODIFIED

KEYWDS MEMBRANE PROTEIN, CELL JUNCTION, CELL MEMBRANE, KEYWDS 2 GLYCOPROTEIN, ION TRANSPORT, IONIC CHANNEL, MEMBRANE, KEYWDS 3 POSTSYNAPTIC CELL MEMBRANE, RECEPTOR, RNA EDITING, SYNAPSE, KEYWDS 4 TRANSMEMBRANE, TRANSPORT

EXPDTA X-RAY DIFFRACTION

AUTHOR C.CHAUDHRY,M.L.MAYER

REVDAT 1 02-JUN-09 3G3G 0

JRNL AUTH C.CHAUDHRY,M.C.WESTON,P.SCHUCK,C.ROSENMUND, JRNL AUTH 2 M.L.MAYER JRNL TITL STABILITY OF LIGAND-BINDING DOMAIN DIMER ASSEMBLY JRNL TITL 2 CONTROLS KAINATE RECEPTOR DESENSITIZATION. JRNL REF EMBO J. V. 28 1518 2009 JRNL REFN ISSN 0261-4189 JRNL PMID 19339989 JRNL DOI 10.1038/EMBOJ.2009.86

REMARK 1

REMARK 2 REMARK 2 RESOLUTION. 1.30 ANGSTROMS.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : PHENIX (PHENIX.REFINE) REMARK 3 AUTHORS : PAUL ADAMS,PAVEL AFONINE,VICENT CHEN,IAN REMARK 3 : DAVIS,KRESHNA GOPAL,RALF GROSSE- REMARK 3 : KUNSTLEVE,LI-WEI HUNG,ROBERT IMMORMINO, REMARK 3 : TOM IOERGER,AIRLIE MCCOY,ERIK MCKEE,NIGEL REMARK 3 : MORIARTY,REETAL PAI,RANDY READ,JANE REMARK 3 : RICHARDSON,DAVID RICHARDSON,TOD ROMO,JIM REMARK 3 : SACCHETTINI,NICHOLAS SAUTER,JACOB SMITH, REMARK 3 : LAURENT STORONI,TOM TERWILLIGER,PETER REMARK 3 : ZWART REMARK 3 REMARK 3 REFINEMENT TARGET : ML REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.30 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 29.26 REMARK 3 MIN(FOBS/SIGMA_FOBS) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 99.6 REMARK 3 NUMBER OF REFLECTIONS : 129531 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 R VALUE (WORKING + TEST SET) : 0.147 REMARK 3 R VALUE (WORKING SET) : 0.146 REMARK 3 FREE R VALUE : 0.168 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 5.010 REMARK 3 FREE R VALUE TEST SET COUNT : 6491 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT (IN BINS). REMARK 3 BIN RESOLUTION RANGE COMPL. NWORK NFREE RWORK RFREE REMARK 3 1 29.2636 - 4.0456 0.99 4184 205 0.1516 0.1810 REMARK 3 2 4.0456 - 3.2124 1.00 4113 240 0.1373 0.1372 REMARK 3 3 3.2124 - 2.8067 1.00 4146 211 0.1488 0.1725 REMARK 3 4 2.8067 - 2.5503 1.00 4098 236 0.1439 0.1885 REMARK 3 5 2.5503 - 2.3676 1.00 4125 229 0.1405 0.1613 REMARK 3 6 2.3676 - 2.2280 1.00 4110 231 0.1265 0.1428 REMARK 3 7 2.2280 - 2.1165 1.00 4112 209 0.1240 0.1400 REMARK 3 8 2.1165 - 2.0244 1.00 4138 218 0.1261 0.1624 REMARK 3 9 2.0244 - 1.9465 1.00 4121 208 0.1304 0.1668 REMARK 3 10 1.9465 - 1.8793 1.00 4107 240 0.1318 0.1507 REMARK 3 11 1.8793 - 1.8205 1.00 4087 213 0.1342 0.1430 REMARK 3 12 1.8205 - 1.7685 1.00 4151 226 0.1314 0.1492 REMARK 3 13 1.7685 - 1.7220 1.00 4073 228 0.1273 0.1684 REMARK 3 14 1.7220 - 1.6800 1.00 4111 189 0.1351 0.1651 REMARK 3 15 1.6800 - 1.6418 1.00 4135 220 0.1303 0.1607 REMARK 3 16 1.6418 - 1.6068 1.00 4127 211 0.1245 0.1548 REMARK 3 17 1.6068 - 1.5747 1.00 4090 209 0.1258 0.1428 REMARK 3 18 1.5747 - 1.5450 1.00 4141 201 0.1267 0.1613 REMARK 3 19 1.5450 - 1.5174 1.00 4152 208 0.1265 0.1585 REMARK 3 20 1.5174 - 1.4917 1.00 4085 209 0.1304 0.1500 REMARK 3 21 1.4917 - 1.4676 1.00 4110 228 0.1384 0.1695 REMARK 3 22 1.4676 - 1.4450 1.00 4120 188 0.1471 0.1709 REMARK 3 23 1.4450 - 1.4238 1.00 4120 218 0.1515 0.1765 REMARK 3 24 1.4238 - 1.4037 1.00 4091 208 0.1570 0.1685 REMARK 3 25 1.4037 - 1.3848 1.00 4110 209 0.1642 0.1977 REMARK 3 26 1.3848 - 1.3668 1.00 4108 210 0.1721 0.1914 REMARK 3 27 1.3668 - 1.3497 1.00 4126 217 0.1786 0.2011 REMARK 3 28 1.3497 - 1.3334 1.00 4073 256 0.1874 0.2089 REMARK 3 29 1.3334 - 1.3179 0.99 4052 223 0.2055 0.2328 REMARK 3 30 1.3179 - 1.3031 0.91 3724 193 0.2175 0.2415 REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : FLAT BULK SOLVENT MODEL REMARK 3 SOLVENT RADIUS : 1.11 REMARK 3 SHRINKAGE RADIUS : 0.90 REMARK 3 K_SOL : 0.42 REMARK 3 B_SOL : 55.25 REMARK 3 REMARK 3 ERROR ESTIMATES. REMARK 3 COORDINATE ERROR (MAXIMUM-LIKELIHOOD BASED) : 0.150 REMARK 3 PHASE ERROR (DEGREES, MAXIMUM-LIKELIHOOD BASED) : NULL REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 11.87 REMARK 3 MEAN B VALUE (OVERALL, A**2) : NULL 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 TWINNING INFORMATION. REMARK 3 FRACTION: NULL REMARK 3 OPERATOR: NULL REMARK 3 REMARK 3 DEVIATIONS FROM IDEAL VALUES. REMARK 3 RMSD COUNT REMARK 3 BOND : 0.016 8863 REMARK 3 ANGLE : 1.392 16115 REMARK 3 CHIRALITY : 0.121 665 REMARK 3 PLANARITY : 0.008 1343 REMARK 3 DIHEDRAL : 14.222 2296 REMARK 3 REMARK 3 TLS DETAILS REMARK 3 NUMBER OF TLS GROUPS : 6 REMARK 3 TLS GROUP : 1 REMARK 3 SELECTION: CHAIN A AND (RESID 3:86) REMARK 3 ORIGIN FOR THE GROUP (A): 14.8148 29.4656 -5.4539 REMARK 3 T TENSOR REMARK 3 T11: 0.1316 T22: 0.0852 REMARK 3 T33: 0.0850 T12: -0.0105 REMARK 3 T13: 0.0015 T23: 0.0228 REMARK 3 L TENSOR REMARK 3 L11: 0.7456 L22: 1.3219 REMARK 3 L33: 0.9459 L12: 0.3053 REMARK 3 L13: -0.0929 L23: -0.1225 REMARK 3 S TENSOR REMARK 3 S11: -0.0538 S12: 0.1008 S13: 0.1087 REMARK 3 S21: -0.2567 S22: 0.0665 S23: 0.0263 REMARK 3 S31: -0.0867 S32: -0.0025 S33: -0.0212 REMARK 3 TLS GROUP : 2 REMARK 3 SELECTION: CHAIN A AND (RESID 87:218) REMARK 3 ORIGIN FOR THE GROUP (A): 21.6617 31.8368 15.3981 REMARK 3 T TENSOR REMARK 3 T11: 0.0598 T22: 0.0522 REMARK 3 T33: 0.0549 T12: -0.0024 REMARK 3 T13: 0.0069 T23: -0.0026 REMARK 3 L TENSOR REMARK 3 L11: 0.6291 L22: 1.4216 REMARK 3 L33: 0.6182 L12: 0.3798 REMARK 3 L13: 0.3069 L23: 0.4492 REMARK 3 S TENSOR REMARK 3 S11: 0.0225 S12: -0.0145 S13: 0.0465 REMARK 3 S21: 0.0852 S22: 0.0078 S23: -0.0923 REMARK 3 S31: 0.0004 S32: 0.0454 S33: -0.0234 REMARK 3 TLS GROUP : 3 REMARK 3 SELECTION: CHAIN A AND (RESID 219:253) REMARK 3 ORIGIN FOR THE GROUP (A): 17.2158 15.3701 -1.5769 REMARK 3 T TENSOR REMARK 3 T11: 0.1021 T22: 0.0822 REMARK 3 T33: 0.0747 T12: -0.0015 REMARK 3 T13: 0.0108 T23: 0.0045 REMARK 3 L TENSOR REMARK 3 L11: 0.4686 L22: 0.8755 REMARK 3 L33: 0.4595 L12: 0.0792 REMARK 3 L13: 0.0454 L23: -0.1184 REMARK 3 S TENSOR REMARK 3 S11: -0.0173 S12: 0.0709 S13: -0.0255 REMARK 3 S21: -0.1410 S22: 0.0126 S23: -0.0724 REMARK 3 S31: 0.0995 S32: 0.0333 S33: -0.0051 REMARK 3 TLS GROUP : 4 REMARK 3 SELECTION: CHAIN B AND (RESID 2:108) REMARK 3 ORIGIN FOR THE GROUP (A): 5.0989 0.6479 16.6813 REMARK 3 T TENSOR REMARK 3 T11: 0.0265 T22: 0.0409 REMARK 3 T33: 0.0374 T12: -0.0044 REMARK 3 T13: -0.0091 T23: 0.0106 REMARK 3 L TENSOR REMARK 3 L11: 1.0146 L22: 0.8260 REMARK 3 L33: 0.7140 L12: -0.0496 REMARK 3 L13: -0.2100 L23: 0.0530 REMARK 3 S TENSOR REMARK 3 S11: 0.0149 S12: -0.0558 S13: -0.0560 REMARK 3 S21: 0.0277 S22: 0.0133 S23: 0.0689 REMARK 3 S31: 0.0183 S32: -0.0329 S33: -0.0255 REMARK 3 TLS GROUP : 5 REMARK 3 SELECTION: CHAIN B AND (RESID 109:216) REMARK 3 ORIGIN FOR THE GROUP (A): 27.4059 -4.9062 11.5810 REMARK 3 T TENSOR REMARK 3 T11: 0.0480 T22: 0.0631 REMARK 3 T33: 0.0574 T12: 0.0052 REMARK 3 T13: 0.0005 T23: 0.0018 REMARK 3 L TENSOR REMARK 3 L11: 1.3402 L22: 0.7258 REMARK 3 L33: 0.7343 L12: -0.1947 REMARK 3 L13: 0.0892 L23: -0.0202 REMARK 3 S TENSOR REMARK 3 S11: 0.0343 S12: -0.0343 S13: -0.0689 REMARK 3 S21: -0.0032 S22: -0.0337 S23: -0.0542 REMARK 3 S31: 0.0560 S32: 0.0698 S33: -0.0011 REMARK 3 TLS GROUP : 6 REMARK 3 SELECTION: CHAIN B AND (RESID 217:253) REMARK 3 ORIGIN FOR THE GROUP (A): 7.9562 12.9801 17.5559 REMARK 3 T TENSOR REMARK 3 T11: 0.0782 T22: 0.0715 REMARK 3 T33: 0.0777 T12: -0.0022 REMARK 3 T13: 0.0043 T23: -0.0075 REMARK 3 L TENSOR REMARK 3 L11: 0.5174 L22: 0.5479 REMARK 3 L33: 0.5276 L12: -0.0246 REMARK 3 L13: -0.0891 L23: -0.2563 REMARK 3 S TENSOR REMARK 3 S11: 0.0302 S12: -0.0465 S13: 0.1105 REMARK 3 S21: 0.0710 S22: 0.0101 S23: 0.0268 REMARK 3 S31: -0.0903 S32: 0.0232 S33: -0.0400 REMARK 3 REMARK 3 NCS DETAILS REMARK 3 NUMBER OF NCS GROUPS : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: REFINEMENT WAS STARTED WITH REFMAC_ REMARK 3 5.2. THE FINAL ROUNDS OF REFINEMENT WERE PERFORMED WITH PHENIX REMARK 3 AND INCLUDED OCCUPANCY REFINEMENT FOR IONS, AND FOR RESIDUES REMARK 3 WITH ALTERNATIVE CONFORMATIONS.

REMARK 4 REMARK 4 3G3G COMPLIES WITH FORMAT V. 3.20, 01-DEC-08

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 18-FEB-09. REMARK 100 THE RCSB ID CODE IS RCSB051374.

REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 08-MAR-08 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 5.6 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : APS REMARK 200 BEAMLINE : 22-ID REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.00000 REMARK 200 MONOCHROMATOR : SI(220) REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : MARMOSAIC 300 MM CCD REMARK 200 INTENSITY-INTEGRATION SOFTWARE : HKL-2000 REMARK 200 DATA SCALING SOFTWARE : HKL-2000 REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 130744 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.300 REMARK 200 RESOLUTION RANGE LOW (A) : 30.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 0.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.1 REMARK 200 DATA REDUNDANCY : 3.900 REMARK 200 R MERGE (I) : 0.03900 REMARK 200 R SYM (I) : NULL REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 15.9000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.30 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.35 REMARK 200 COMPLETENESS FOR SHELL (%) : 91.4 REMARK 200 DATA REDUNDANCY IN SHELL : 3.30 REMARK 200 R MERGE FOR SHELL (I) : 0.30900 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : 3.380 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: DIFFERENCE FOURIER REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL

REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 46.90 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.32 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 15% PEG 4K, 13% ISOPROPANOL, 0.1 M REMARK 280 NACITRATE, PH 5.6, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE REMARK 280 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 56.76600 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 NATIVE PROTEIN IS BELIEVED TO BE A DIMER OF DIMERS; REMARK 300 ONLY 1 COPY OF THE DIMER FORMED BY CHAINS A AND B IS PRESENT IN REMARK 300 THIS CRYSTAL FORM.

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: 2850 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 22550 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -60.0 KCAL/MOL 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 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 GLY A 1 REMARK 465 SER A 2 REMARK 465 GLY A 254 REMARK 465 ASN A 255 REMARK 465 GLY A 256 REMARK 465 GLU A 259 REMARK 465 GLY B 1 REMARK 465 GLY B 254 REMARK 465 ASN B 255 REMARK 465 GLY B 256 REMARK 465 PRO B 258 REMARK 465 GLU B 259

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 SER A 153 OD1 ASP A 156 2.13 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS 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,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3) 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 RES CSSEQI ATM2 DEVIATION REMARK 500 THR A 193 CA THR A 193 CB 0.159 REMARK 500 TYR B 61 CE1 TYR B 61 CZ -0.114 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 ARG A 4 NE - CZ - NH2 ANGL. DEV. = -3.0 DEGREES REMARK 500 ASP A 58 CB - CG - OD2 ANGL. DEV. = -5.9 DEGREES REMARK 500 ARG A 149 NE - CZ - NH1 ANGL. DEV. = 3.4 DEGREES REMARK 500 MET A 162 CG - SD - CE ANGL. DEV. = -9.7 DEGREES REMARK 500 ARG B 41 NE - CZ - NH1 ANGL. DEV. = 3.1 DEGREES REMARK 500 ARG B 54 NE - CZ - NH1 ANGL. DEV. = -3.1 DEGREES REMARK 500 ARG B 76 NE - CZ - NH2 ANGL. DEV. = -3.1 DEGREES REMARK 500 MET B 162 CG - SD - CE ANGL. DEV. = -20.9 DEGREES REMARK 500 ARG B 228 NE - CZ - NH2 ANGL. DEV. = -3.5 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 GLU A 13 109.11 -162.73 REMARK 500 GLU B 13 106.23 -163.78 REMARK 500 REMARK 500 REMARK: NULL

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 NA A 262 NA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLU A 97 O REMARK 620 2 GLU A 97 OE2 96.5 REMARK 620 3 ILE A 100 O 83.8 88.1 REMARK 620 4 ASP A 101 OD1 159.1 103.6 90.9 REMARK 620 5 HOH A 386 O 93.2 111.6 160.3 85.0 REMARK 620 N 1 2 3 4 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 NA B 263 NA REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLU B 97 O REMARK 620 2 GLU B 97 OE2 94.3 REMARK 620 3 ILE B 100 O 85.3 89.0 REMARK 620 4 ASP B 101 OD1 160.5 104.9 91.5 REMARK 620 5 HOH B 447 O 90.9 105.3 165.5 87.5 REMARK 620 N 1 2 3 4

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 260 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CL A 261 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA A 262 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE GLU B 260 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CL B 261 REMARK 800 SITE_IDENTIFIER: AC6 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE CL B 262 REMARK 800 SITE_IDENTIFIER: AC7 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE NA B 263

REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 3G3F RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF THE GLUR6 WILD TYPE LIGAND BINDING REMARK 900 DOMAIN DIMER REMARK 900 RELATED ID: 3G3H RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF THE GLUR6 K665R I749L Q753K MUTANT REMARK 900 LIGAND BINDING DOMAIN DIMER REMARK 900 RELATED ID: 3G3I RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF THE GLUR6 I442H K494E I749L Q753K REMARK 900 MUTANT LIGAND BINDING DOMAIN DIMER REMARK 900 RELATED ID: 3G3J RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF THE GLUR6 I442H K494E K665R I749L REMARK 900 Q753K MUTANT LIGAND BINDING DOMAIN DIMER REMARK 900 RELATED ID: 3G3K RELATED DB: PDB REMARK 900 CRYSTAL STRUCTURE OF THE GLUR6 I442H K494E K665R I749L REMARK 900 Q753K E757Q MUTANT LIGAND BINDING DOMAIN DIMER

DBREF 3G3G A 2 117 UNP P42260 GRIK2_RAT 429 544 DBREF 3G3G A 120 259 UNP P42260 GRIK2_RAT 667 806 DBREF 3G3G B 2 117 UNP P42260 GRIK2_RAT 429 544 DBREF 3G3G B 120 259 UNP P42260 GRIK2_RAT 667 806

SEQADV 3G3G GLY A 1 UNP P42260 EXPRESSION TAG SEQADV 3G3G GLY A 118 UNP P42260 LINKER SEQADV 3G3G THR A 119 UNP P42260 LINKER SEQADV 3G3G ARG A 149 UNP P42260 LYS 696 ENGINEERED SEQADV 3G3G GLY B 1 UNP P42260 EXPRESSION TAG SEQADV 3G3G GLY B 118 UNP P42260 LINKER SEQADV 3G3G THR B 119 UNP P42260 LINKER SEQADV 3G3G ARG B 149 UNP P42260 LYS 696 ENGINEERED

SEQRES 1 A 259 GLY SER ASN ARG SER LEU ILE VAL THR THR ILE LEU GLU SEQRES 2 A 259 GLU PRO TYR VAL LEU PHE LYS LYS SER ASP LYS PRO LEU SEQRES 3 A 259 TYR GLY ASN ASP ARG PHE GLU GLY TYR CYS ILE ASP LEU SEQRES 4 A 259 LEU ARG GLU LEU SER THR ILE LEU GLY PHE THR TYR GLU SEQRES 5 A 259 ILE ARG LEU VAL GLU ASP GLY LYS TYR GLY ALA GLN ASP SEQRES 6 A 259 ASP VAL ASN GLY GLN TRP ASN GLY MET VAL ARG GLU LEU SEQRES 7 A 259 ILE ASP HIS LYS ALA ASP LEU ALA VAL ALA PRO LEU ALA SEQRES 8 A 259 ILE THR TYR VAL ARG GLU LYS VAL ILE ASP PHE SER LYS SEQRES 9 A 259 PRO PHE MET THR LEU GLY ILE SER ILE LEU TYR ARG LYS SEQRES 10 A 259 GLY THR PRO ILE ASP SER ALA ASP ASP LEU ALA LYS GLN SEQRES 11 A 259 THR LYS ILE GLU TYR GLY ALA VAL GLU ASP GLY ALA THR SEQRES 12 A 259 MET THR PHE PHE LYS ARG SER LYS ILE SER THR TYR ASP SEQRES 13 A 259 LYS MET TRP ALA PHE MET SER SER ARG ARG GLN SER VAL SEQRES 14 A 259 LEU VAL LYS SER ASN GLU GLU GLY ILE GLN ARG VAL LEU SEQRES 15 A 259 THR SER ASP TYR ALA PHE LEU MET GLU SER THR THR ILE SEQRES 16 A 259 GLU PHE VAL THR GLN ARG ASN CYS ASN LEU THR GLN ILE SEQRES 17 A 259 GLY GLY LEU ILE ASP SER LYS GLY TYR GLY VAL GLY THR SEQRES 18 A 259 PRO MET GLY SER PRO TYR ARG ASP LYS ILE THR ILE ALA SEQRES 19 A 259 ILE LEU GLN LEU GLN GLU GLU GLY LYS LEU HIS MET MET SEQRES 20 A 259 LYS GLU LYS TRP TRP ARG GLY ASN GLY CYS PRO GLU SEQRES 1 B 259 GLY SER ASN ARG SER LEU ILE VAL THR THR ILE LEU GLU SEQRES 2 B 259 GLU PRO TYR VAL LEU PHE LYS LYS SER ASP LYS PRO LEU SEQRES 3 B 259 TYR GLY ASN ASP ARG PHE GLU GLY TYR CYS ILE ASP LEU SEQRES 4 B 259 LEU ARG GLU LEU SER THR ILE LEU GLY PHE THR TYR GLU SEQRES 5 B 259 ILE ARG LEU VAL GLU ASP GLY LYS TYR GLY ALA GLN ASP SEQRES 6 B 259 ASP VAL ASN GLY GLN TRP ASN GLY MET VAL ARG GLU LEU SEQRES 7 B 259 ILE ASP HIS LYS ALA ASP LEU ALA VAL ALA PRO LEU ALA SEQRES 8 B 259 ILE THR TYR VAL ARG GLU LYS VAL ILE ASP PHE SER LYS SEQRES 9 B 259 PRO PHE MET THR LEU GLY ILE SER ILE LEU TYR ARG LYS SEQRES 10 B 259 GLY THR PRO ILE ASP SER ALA ASP ASP LEU ALA LYS GLN SEQRES 11 B 259 THR LYS ILE GLU TYR GLY ALA VAL GLU ASP GLY ALA THR SEQRES 12 B 259 MET THR PHE PHE LYS ARG SER LYS ILE SER THR TYR ASP SEQRES 13 B 259 LYS MET TRP ALA PHE MET SER SER ARG ARG GLN SER VAL SEQRES 14 B 259 LEU VAL LYS SER ASN GLU GLU GLY ILE GLN ARG VAL LEU SEQRES 15 B 259 THR SER ASP TYR ALA PHE LEU MET GLU SER THR THR ILE SEQRES 16 B 259 GLU PHE VAL THR GLN ARG ASN CYS ASN LEU THR GLN ILE SEQRES 17 B 259 GLY GLY LEU ILE ASP SER LYS GLY TYR GLY VAL GLY THR SEQRES 18 B 259 PRO MET GLY SER PRO TYR ARG ASP LYS ILE THR ILE ALA SEQRES 19 B 259 ILE LEU GLN LEU GLN GLU GLU GLY LYS LEU HIS MET MET SEQRES 20 B 259 LYS GLU LYS TRP TRP ARG GLY ASN GLY CYS PRO GLU

HET GLU A 260 18 HET CL A 261 1 HET NA A 262 1 HET GLU B 260 15 HET CL B 261 1 HET CL B 262 1 HET NA B 263 1

HETNAM GLU GLUTAMIC ACID HETNAM CL CHLORIDE ION HETNAM NA SODIUM ION

FORMUL 3 GLU 2(C5 H9 N O4) FORMUL 4 CL 3(CL 1-) FORMUL 5 NA 2(NA 1+) FORMUL 10 HOH *658(H2 O)

HELIX 1 1 TYR A 27 ASP A 30 5 4 HELIX 2 2 GLY A 34 GLY A 48 1 15 HELIX 3 3 ASN A 72 ASP A 80 1 9 HELIX 4 4 THR A 93 LYS A 98 1 6 HELIX 5 5 SER A 123 LYS A 129 1 7 HELIX 6 6 GLY A 141 SER A 150 1 10 HELIX 7 7 ILE A 152 ARG A 165 1 14 HELIX 8 8 ARG A 165 VAL A 169 1 5 HELIX 9 9 SER A 173 SER A 184 1 12 HELIX 10 10 SER A 192 ASN A 202 1 11 HELIX 11 11 PRO A 226 GLU A 241 1 16 HELIX 12 12 GLY A 242 ARG A 253 1 12 HELIX 13 13 TYR B 27 ASP B 30 5 4 HELIX 14 14 GLY B 34 GLY B 48 1 15 HELIX 15 15 ASN B 72 ASP B 80 1 9 HELIX 16 16 THR B 93 LYS B 98 1 6 HELIX 17 17 SER B 123 LYS B 129 1 7 HELIX 18 18 GLY B 141 SER B 150 1 10 HELIX 19 19 ILE B 152 ARG B 165 1 14 HELIX 20 20 ARG B 165 VAL B 169 1 5 HELIX 21 21 SER B 173 SER B 184 1 12 HELIX 22 22 SER B 192 ASN B 202 1 11 HELIX 23 23 PRO B 226 GLU B 241 1 16 HELIX 24 24 GLY B 242 ARG B 253 1 12

SHEET 1 A 3 TYR A 51 LEU A 55 0 SHEET 2 A 3 LEU A 6 THR A 10 1 N VAL A 8 O ARG A 54 SHEET 3 A 3 LEU A 85 ALA A 86 1 O LEU A 85 N THR A 9 SHEET 1 B 2 LEU A 18 PHE A 19 0 SHEET 2 B 2 PHE A 32 GLU A 33 -1 O GLU A 33 N LEU A 18 SHEET 1 C 2 ILE A 100 PHE A 102 0 SHEET 2 C 2 GLY A 220 PRO A 222 -1 O THR A 221 N ASP A 101 SHEET 1 D 2 MET A 107 LEU A 109 0 SHEET 2 D 2 LYS A 215 TYR A 217 -1 O LYS A 215 N LEU A 109 SHEET 1 E 5 LEU A 170 VAL A 171 0 SHEET 2 E 5 GLU A 134 VAL A 138 1 N ALA A 137 O VAL A 171 SHEET 3 E 5 TYR A 186 GLU A 191 1 O LEU A 189 N GLY A 136 SHEET 4 E 5 ILE A 111 ARG A 116 -1 N LEU A 114 O PHE A 188 SHEET 5 E 5 LEU A 205 ILE A 208 -1 O THR A 206 N TYR A 115 SHEET 1 F 3 TYR B 51 LEU B 55 0 SHEET 2 F 3 LEU B 6 THR B 10 1 N VAL B 8 O ARG B 54 SHEET 3 F 3 LEU B 85 ALA B 86 1 O LEU B 85 N THR B 9 SHEET 1 G 2 LEU B 18 PHE B 19 0 SHEET 2 G 2 PHE B 32 GLU B 33 -1 O GLU B 33 N LEU B 18 SHEET 1 H 2 ILE B 100 PHE B 102 0 SHEET 2 H 2 GLY B 220 PRO B 222 -1 O THR B 221 N ASP B 101 SHEET 1 I 2 MET B 107 LEU B 109 0 SHEET 2 I 2 LYS B 215 TYR B 217 -1 O LYS B 215 N LEU B 109 SHEET 1 J 5 LEU B 170 VAL B 171 0 SHEET 2 J 5 GLU B 134 VAL B 138 1 N ALA B 137 O VAL B 171 SHEET 3 J 5 TYR B 186 GLU B 191 1 O LEU B 189 N GLY B 136 SHEET 4 J 5 ILE B 111 ARG B 116 -1 N LEU B 114 O PHE B 188 SHEET 5 J 5 LEU B 205 ILE B 208 -1 O THR B 206 N TYR B 115

SSBOND 1 CYS A 203 CYS A 257 1555 1555 2.03 SSBOND 2 CYS B 203 CYS B 257 1555 1555 2.03

LINK O GLU A 97 NA NA A 262 1555 1555 2.28 LINK OE2 GLU A 97 NA NA A 262 1555 1555 2.47 LINK O ILE A 100 NA NA A 262 1555 1555 2.36 LINK OD1 ASP A 101 NA NA A 262 1555 1555 2.36 LINK O GLU B 97 NA NA B 263 1555 1555 2.26 LINK OE2 GLU B 97 NA NA B 263 1555 1555 2.53 LINK O ILE B 100 NA NA B 263 1555 1555 2.29 LINK OD1 ASP B 101 NA NA B 263 1555 1555 2.34 LINK NA NA A 262 O HOH A 386 1555 1555 2.27 LINK NA NA B 263 O HOH B 447 1555 1555 2.25

CISPEP 1 GLU A 14 PRO A 15 0 1.21 CISPEP 2 GLU B 14 PRO B 15 0 2.31

SITE 1 AC1 13 TYR A 61 PRO A 89 LEU A 90 ALA A 91 SITE 2 AC1 13 ARG A 96 GLY A 141 ALA A 142 THR A 143 SITE 3 AC1 13 GLU A 191 HOH A 278 HOH A 279 HOH A 280 SITE 4 AC1 13 HOH A 297 SITE 1 AC2 5 SER A 123 ALA A 124 ASP A 125 HOH A 309 SITE 2 AC2 5 HOH A 670 SITE 1 AC3 6 GLU A 97 ILE A 100 ASP A 101 MET A 223 SITE 2 AC3 6 ARG A 228 HOH A 386 SITE 1 AC4 13 TYR B 61 PRO B 89 LEU B 90 ALA B 91 SITE 2 AC4 13 ARG B 96 GLY B 141 ALA B 142 THR B 143 SITE 3 AC4 13 GLU B 191 HOH B 265 HOH B 266 HOH B 287 SITE 4 AC4 13 HOH B 291 SITE 1 AC5 4 LYS A 104 ARG A 228 LYS B 104 ARG B 228 SITE 1 AC6 3 SER B 5 LYS B 117 GLY B 118 SITE 1 AC7 5 GLU B 97 ILE B 100 ASP B 101 MET B 223 SITE 2 AC7 5 HOH B 447

CRYST1 50.990 113.532 52.022 90.00 115.24 90.00 P 1 21 1 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 0.019612 0.000000 0.009244 0.00000

SCALE2 0.000000 0.008808 0.000000 0.00000

SCALE3 0.000000 0.000000 0.021251 0.00000