HEADER TRANSPORT PROTEIN 12-JAN-10 3LDC TITLE HIGH RESOLUTION OPEN MTHK PORE STRUCTURE CRYSTALLIZED IN 100 MM K+ COMPND MOL_ID: 1; COMPND 2 MOLECULE: CALCIUM-GATED POTASSIUM CHANNEL MTHK; COMPND 3 CHAIN: A; COMPND 4 FRAGMENT: MTHK K+ CHANNEL, RESIDUES 28-99; COMPND 5 ENGINEERED: YES; COMPND 6 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: METHANOTHERMOBACTER THERMAUTOTROPHICUS; SOURCE 3 ORGANISM_TAXID: 187420; SOURCE 4 GENE: MTHK, MTH_1520; SOURCE 5 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 6 EXPRESSION_SYSTEM_TAXID: 562; SOURCE 7 EXPRESSION_SYSTEM_STRAIN: SG13009; SOURCE 8 EXPRESSION_SYSTEM_VECTOR_TYPE: PLASMID; SOURCE 9 EXPRESSION_SYSTEM_PLASMID: PQE70 KEYWDS TRANSMEMBRANE, ION CHANNEL, OPEN CONFORMATION, POTASSIUM, ION KEYWDS 2 TRANSPORT, ALTERNATIVE INITIATION, CELL MEMBRANE, IONIC CHANNEL, KEYWDS 3 MEMBRANE, METAL-BINDING, POTASSIUM TRANSPORT, TRANSPORT PROTEIN EXPDTA X-RAY DIFFRACTION AUTHOR S.YE REVDAT 4 06-SEP-23 3LDC 1 REMARK REVDAT 3 13-OCT-21 3LDC 1 REMARK SEQADV LINK REVDAT 2 18-AUG-10 3LDC 1 JRNL REVDAT 1 11-AUG-10 3LDC 0 JRNL AUTH S.YE,Y.LI,Y.JIANG JRNL TITL NOVEL INSIGHTS INTO K(+) SELECTIVITY FROM HIGH-RESOLUTION JRNL TITL 2 STRUCTURES OF AN OPEN K(+) CHANNEL PORE. JRNL REF NAT.STRUCT.MOL.BIOL. V. 17 1019 2010 JRNL REFN ISSN 1545-9993 JRNL PMID 20676101 JRNL DOI 10.1038/NSMB.1865 REMARK 2 REMARK 2 RESOLUTION. 1.45 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.2.0019 REMARK 3 AUTHORS : MURSHUDOV,SKUBAK,LEBEDEV,PANNU,STEINER, REMARK 3 : NICHOLLS,WINN,LONG,VAGIN REMARK 3 REMARK 3 REFINEMENT TARGET : MAXIMUM LIKELIHOOD REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.45 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 23.95 REMARK 3 DATA CUTOFF (SIGMA(F)) : NULL REMARK 3 COMPLETENESS FOR RANGE (%) : 99.3 REMARK 3 NUMBER OF REFLECTIONS : 14863 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 + TEST SET) : 0.188 REMARK 3 R VALUE (WORKING SET) : 0.187 REMARK 3 FREE R VALUE : 0.202 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 10.200 REMARK 3 FREE R VALUE TEST SET COUNT : 1697 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 20 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 1.45 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.49 REMARK 3 REFLECTION IN BIN (WORKING SET) : 1042 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 98.74 REMARK 3 BIN R VALUE (WORKING SET) : 0.2480 REMARK 3 BIN FREE R VALUE SET COUNT : 133 REMARK 3 BIN FREE R VALUE : 0.3100 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 640 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 5 REMARK 3 SOLVENT ATOMS : 52 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 28.60 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 28.61 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 0.21000 REMARK 3 B22 (A**2) : 0.21000 REMARK 3 B33 (A**2) : -0.42000 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 OVERALL COORDINATE ERROR. REMARK 3 ESU BASED ON R VALUE (A): 0.068 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.066 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.042 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 2.292 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.964 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.960 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 659 ; 0.010 ; 0.022 REMARK 3 BOND LENGTHS OTHERS (A): NULL ; NULL ; NULL REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 905 ; 1.260 ; 1.953 REMARK 3 BOND ANGLES OTHERS (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 1 (DEGREES): 81 ; 3.997 ; 5.000 REMARK 3 TORSION ANGLES, PERIOD 2 (DEGREES): 22 ;18.992 ;21.364 REMARK 3 TORSION ANGLES, PERIOD 3 (DEGREES): 94 ;12.318 ;15.000 REMARK 3 TORSION ANGLES, PERIOD 4 (DEGREES): 2 ;19.305 ;15.000 REMARK 3 CHIRAL-CENTER RESTRAINTS (A**3): 112 ; 0.081 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 480 ; 0.005 ; 0.020 REMARK 3 GENERAL PLANES OTHERS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED CONTACTS REFINED ATOMS (A): 339 ; 0.247 ; 0.200 REMARK 3 NON-BONDED CONTACTS OTHERS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED TORSION REFINED ATOMS (A): 486 ; 0.322 ; 0.200 REMARK 3 NON-BONDED TORSION OTHERS (A): NULL ; NULL ; NULL REMARK 3 H-BOND (X...Y) REFINED ATOMS (A): 22 ; 0.235 ; 0.200 REMARK 3 H-BOND (X...Y) OTHERS (A): NULL ; NULL ; NULL REMARK 3 POTENTIAL METAL-ION REFINED ATOMS (A): 5 ; 0.071 ; 0.200 REMARK 3 POTENTIAL METAL-ION OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY VDW REFINED ATOMS (A): 71 ; 0.566 ; 0.200 REMARK 3 SYMMETRY VDW OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY H-BOND REFINED ATOMS (A): 6 ; 0.179 ; 0.200 REMARK 3 SYMMETRY H-BOND OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY METAL-ION REFINED ATOMS (A): 15 ; 0.070 ; 0.200 REMARK 3 SYMMETRY METAL-ION OTHERS (A): NULL ; NULL ; NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. COUNT RMS WEIGHT REMARK 3 MAIN-CHAIN BOND REFINED ATOMS (A**2): 404 ; 0.753 ; 1.500 REMARK 3 MAIN-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE REFINED ATOMS (A**2): 659 ; 1.385 ; 2.000 REMARK 3 MAIN-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN BOND REFINED ATOMS (A**2): 260 ; 2.011 ; 3.000 REMARK 3 SIDE-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): 246 ; 2.765 ; 4.500 REMARK 3 SIDE-CHAIN ANGLE OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 LONG RANGE B REFINED ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 LONG RANGE B OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 REMARK 3 ANISOTROPIC THERMAL FACTOR RESTRAINTS. COUNT RMS WEIGHT REMARK 3 RIGID-BOND RESTRAINTS (A**2): NULL ; NULL ; NULL REMARK 3 SPHERICITY; FREE ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SPHERICITY; BONDED ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 REMARK 3 NCS RESTRAINTS STATISTICS REMARK 3 NUMBER OF DIFFERENT NCS GROUPS : NULL REMARK 3 REMARK 3 TLS DETAILS REMARK 3 NUMBER OF TLS GROUPS : 1 REMARK 3 REMARK 3 TLS GROUP : 1 REMARK 3 NUMBER OF COMPONENTS GROUP : 10 REMARK 3 COMPONENTS C SSSEQI TO C SSSEQI REMARK 3 RESIDUE RANGE : A 18 A 42 REMARK 3 RESIDUE RANGE : A 43 A 68 REMARK 3 RESIDUE RANGE : A 69 A 83 REMARK 3 RESIDUE RANGE : A 84 A 99 REMARK 3 RESIDUE RANGE : K 1 K 1 REMARK 3 RESIDUE RANGE : K 2 K 2 REMARK 3 RESIDUE RANGE : K 3 K 3 REMARK 3 RESIDUE RANGE : K 4 K 4 REMARK 3 RESIDUE RANGE : K 5 K 5 REMARK 3 RESIDUE RANGE : K 6 K 6 REMARK 3 ORIGIN FOR THE GROUP (A): 4.6947 19.1733 -4.2448 REMARK 3 T TENSOR REMARK 3 T11: 0.0218 T22: -0.0097 REMARK 3 T33: -0.0138 T12: 0.0172 REMARK 3 T13: -0.0271 T23: -0.0059 REMARK 3 L TENSOR REMARK 3 L11: 0.6743 L22: 0.5932 REMARK 3 L33: 1.2629 L12: -0.5977 REMARK 3 L13: 0.2058 L23: -0.4581 REMARK 3 S TENSOR REMARK 3 S11: -0.0248 S12: -0.0364 S13: 0.0170 REMARK 3 S21: 0.0022 S22: 0.0727 S23: 0.0330 REMARK 3 S31: 0.1057 S32: 0.0986 S33: -0.0479 REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : MASK REMARK 3 PARAMETERS FOR MASK CALCULATION REMARK 3 VDW PROBE RADIUS : 1.20 REMARK 3 ION PROBE RADIUS : 0.80 REMARK 3 SHRINKAGE RADIUS : 0.80 REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 3LDC COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 26-JAN-10. REMARK 100 THE DEPOSITION ID IS D_1000057137. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 10-AUG-08 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 7.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : APS REMARK 200 BEAMLINE : 19-ID REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.9794 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 315 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : HKL-2000 REMARK 200 DATA SCALING SOFTWARE : HKL-2000 REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 16583 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.450 REMARK 200 RESOLUTION RANGE LOW (A) : 50.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 2.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.3 REMARK 200 DATA REDUNDANCY : 8.500 REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : 0.04400 REMARK 200 FOR THE DATA SET : 50.9000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 1.45 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 1.48 REMARK 200 COMPLETENESS FOR SHELL (%) : 98.5 REMARK 200 DATA REDUNDANCY IN SHELL : 6.30 REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : 0.75000 REMARK 200 FOR SHELL : 1.600 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: PHASES REMARK 200 STARTING MODEL: PDB ENTRY 1K4C REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 50.44 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.48 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 3.0-3.5 M 1,6-HEXANDIOL, 100 MM HEPES, REMARK 280 PH 7.5, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 293K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 4 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 -Y+1/2,X+1/2,Z REMARK 290 4555 Y+1/2,-X+1/2,Z REMARK 290 5555 -X+1/2,Y+1/2,-Z REMARK 290 6555 X+1/2,-Y+1/2,-Z REMARK 290 7555 Y,X,-Z REMARK 290 8555 -Y,-X,-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 0.000000 -1.000000 0.000000 31.90550 REMARK 290 SMTRY2 3 1.000000 0.000000 0.000000 31.90550 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 4 0.000000 1.000000 0.000000 31.90550 REMARK 290 SMTRY2 4 -1.000000 0.000000 0.000000 31.90550 REMARK 290 SMTRY3 4 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 5 -1.000000 0.000000 0.000000 31.90550 REMARK 290 SMTRY2 5 0.000000 1.000000 0.000000 31.90550 REMARK 290 SMTRY3 5 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 6 1.000000 0.000000 0.000000 31.90550 REMARK 290 SMTRY2 6 0.000000 -1.000000 0.000000 31.90550 REMARK 290 SMTRY3 6 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 7 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY2 7 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 7 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 8 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY2 8 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 8 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: TETRAMERIC REMARK 350 SOFTWARE DETERMINED QUATERNARY STRUCTURE: TETRAMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 6090 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 14890 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -74.0 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 0.00000 REMARK 350 BIOMT2 2 0.000000 -1.000000 0.000000 63.81100 REMARK 350 BIOMT3 2 0.000000 0.000000 1.000000 0.00000 REMARK 350 BIOMT1 3 0.000000 -1.000000 0.000000 31.90550 REMARK 350 BIOMT2 3 1.000000 0.000000 0.000000 31.90550 REMARK 350 BIOMT3 3 0.000000 0.000000 1.000000 0.00000 REMARK 350 BIOMT1 4 0.000000 1.000000 0.000000 -31.90550 REMARK 350 BIOMT2 4 -1.000000 0.000000 0.000000 31.90550 REMARK 350 BIOMT3 4 0.000000 0.000000 1.000000 0.00000 REMARK 375 REMARK 375 SPECIAL POSITION REMARK 375 THE FOLLOWING ATOMS ARE FOUND TO BE WITHIN 0.15 ANGSTROMS REMARK 375 OF A SYMMETRY RELATED ATOM AND ARE ASSUMED TO BE ON SPECIAL REMARK 375 POSITIONS. REMARK 375 REMARK 375 ATOM RES CSSEQI REMARK 375 K K A 1 LIES ON A SPECIAL POSITION. REMARK 375 K K A 2 LIES ON A SPECIAL POSITION. REMARK 375 K K A 3 LIES ON A SPECIAL POSITION. REMARK 375 K K A 4 LIES ON A SPECIAL POSITION. REMARK 375 K K A 5 LIES ON A SPECIAL POSITION. REMARK 375 HOH A 100 LIES ON A SPECIAL POSITION. 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 HOH A 17 O HOH A 129 2.10 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 K A 1 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLY A 61 O REMARK 620 2 TYR A 62 O 71.5 REMARK 620 N 1 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 K A 2 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 VAL A 60 O REMARK 620 2 GLY A 61 O 74.5 REMARK 620 N 1 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 K A 3 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 THR A 59 O REMARK 620 2 VAL A 60 O 74.9 REMARK 620 N 1 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 K A 4 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 THR A 59 OG1 REMARK 620 2 THR A 59 O 62.8 REMARK 620 3 HOH A 100 O 68.3 130.9 REMARK 620 N 1 2 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 K A 5 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 HOH A 101 O REMARK 620 2 HOH A 102 O 84.1 REMARK 620 N 1 REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE K A 1 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE K A 2 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE K A 3 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE K A 4 REMARK 800 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE K A 5 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1LNQ RELATED DB: PDB REMARK 900 FULL LENGTH MTHK K+ CHANNEL REMARK 900 RELATED ID: 2FY8 RELATED DB: PDB REMARK 900 GATING RING OF MTHK REMARK 900 RELATED ID: 3LDD RELATED DB: PDB REMARK 900 RELATED ID: 3LDE RELATED DB: PDB DBREF 3LDC A 18 99 UNP O27564 MTHK_METTH 18 99 SEQADV 3LDC HIS A 68 UNP O27564 SER 68 ENGINEERED MUTATION SEQADV 3LDC CYS A 77 UNP O27564 VAL 77 ENGINEERED MUTATION SEQRES 1 A 82 VAL PRO ALA THR ARG ILE LEU LEU LEU VAL LEU ALA VAL SEQRES 2 A 82 ILE ILE TYR GLY THR ALA GLY PHE HIS PHE ILE GLU GLY SEQRES 3 A 82 GLU SER TRP THR VAL SER LEU TYR TRP THR PHE VAL THR SEQRES 4 A 82 ILE ALA THR VAL GLY TYR GLY ASP TYR SER PRO HIS THR SEQRES 5 A 82 PRO LEU GLY MET TYR PHE THR CYS THR LEU ILE VAL LEU SEQRES 6 A 82 GLY ILE GLY THR PHE ALA VAL ALA VAL GLU ARG LEU LEU SEQRES 7 A 82 GLU PHE LEU ILE HET K A 1 1 HET K A 2 1 HET K A 3 1 HET K A 4 1 HET K A 5 1 HETNAM K POTASSIUM ION FORMUL 2 K 5(K 1+) FORMUL 7 HOH *52(H2 O) HELIX 1 1 PRO A 19 GLY A 43 1 25 HELIX 2 2 SER A 45 ALA A 58 1 14 HELIX 3 3 THR A 69 ILE A 99 1 31 LINK K K A 1 O GLY A 61 1555 1555 2.95 LINK K K A 1 O TYR A 62 1555 1555 2.74 LINK K K A 2 O VAL A 60 1555 1555 2.81 LINK K K A 2 O GLY A 61 1555 1555 2.73 LINK K K A 3 O THR A 59 1555 1555 2.68 LINK K K A 3 O VAL A 60 1555 1555 2.86 LINK K K A 4 OG1 THR A 59 1555 1555 2.79 LINK K K A 4 O THR A 59 1555 1555 2.90 LINK K K A 4 O HOH A 100 1555 1555 3.18 LINK K K A 5 O HOH A 101 1555 1555 2.74 LINK K K A 5 O HOH A 102 1555 1555 2.73 SITE 1 AC1 3 K A 2 GLY A 61 TYR A 62 SITE 1 AC2 4 K A 1 K A 3 VAL A 60 GLY A 61 SITE 1 AC3 4 K A 2 K A 4 THR A 59 VAL A 60 SITE 1 AC4 2 K A 3 THR A 59 SITE 1 AC5 2 HOH A 101 HOH A 102 CRYST1 63.811 63.811 44.050 90.00 90.00 90.00 P 4 21 2 8 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 0.015671 0.000000 0.000000 0.00000 SCALE2 0.000000 0.015671 0.000000 0.00000 SCALE3 0.000000 0.000000 0.022701 0.00000