HEADER TRANSPORT PROTEIN 07-NOV-24 9E94 TITLE CRYO-EM STRUCTURE OF HUMAN TWIK-2 AT PH 7.5 COMPND MOL_ID: 1; COMPND 2 MOLECULE: POTASSIUM CHANNEL SUBFAMILY K MEMBER 6; COMPND 3 CHAIN: A, B; COMPND 4 SYNONYM: INWARD RECTIFYING POTASSIUM CHANNEL PROTEIN TWIK-2,TWIK- COMPND 5 ORIGINATED SIMILARITY SEQUENCE; 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: KCNK6, TOSS, TWIK2; SOURCE 6 EXPRESSION_SYSTEM: HOMO SAPIENS; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 9606; SOURCE 8 EXPRESSION_SYSTEM_CELL_LINE: HEK293S GNTI-; SOURCE 9 EXPRESSION_SYSTEM_ATCC_NUMBER: CRL-3022; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PEG BACMAM N TERM STREP KEYWDS POTASSIUM ION CHANNEL K2P, TRANSPORT PROTEIN EXPDTA ELECTRON MICROSCOPY AUTHOR Q.MA,A.KUMAR,V.NAVRATNA,S.MOSALAGANTI REVDAT 1 11-FEB-26 9E94 0 JRNL AUTH Q.MA,C.C.HERNANDEZ,V.NAVRATNA,A.KUMAR,J.K.RANA,J.ZONG,A.LEE, JRNL AUTH 2 S.MOSALAGANTI JRNL TITL INSIGHTS INTO THE STRUCTURE AND MODULATION OF HUMAN TWIK-2. JRNL REF NAT COMMUN 2026 JRNL REFN ESSN 2041-1723 JRNL PMID 41617707 JRNL DOI 10.1038/S41467-026-69072-1 REMARK 2 REMARK 2 RESOLUTION. 3.67 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 SOFTWARE PACKAGES : CRYOSPARC, SERIALEM, CRYOSPARC, REMARK 3 CRYOSPARC, PHENIX REMARK 3 RECONSTRUCTION SCHEMA : NULL REMARK 3 REMARK 3 EM MAP-MODEL FITTING AND REFINEMENT REMARK 3 PDB ENTRY : NULL REMARK 3 REFINEMENT SPACE : NULL REMARK 3 REFINEMENT PROTOCOL : RIGID BODY FIT REMARK 3 REFINEMENT TARGET : NULL REMARK 3 OVERALL ANISOTROPIC B VALUE : NULL REMARK 3 REMARK 3 FITTING PROCEDURE : NULL REMARK 3 REMARK 3 EM IMAGE RECONSTRUCTION STATISTICS REMARK 3 NOMINAL PIXEL SIZE (ANGSTROMS) : NULL REMARK 3 ACTUAL PIXEL SIZE (ANGSTROMS) : NULL REMARK 3 EFFECTIVE RESOLUTION (ANGSTROMS) : 3.670 REMARK 3 NUMBER OF PARTICLES : 104997 REMARK 3 CTF CORRECTION METHOD : PHASE FLIPPING AND AMPLITUDE REMARK 3 CORRECTION REMARK 3 REMARK 3 EM RECONSTRUCTION MAGNIFICATION CALIBRATION: NULL REMARK 3 REMARK 3 OTHER DETAILS: NULL REMARK 4 REMARK 4 9E94 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 08-NOV-24. REMARK 100 THE DEPOSITION ID IS D_1000288831. REMARK 245 REMARK 245 EXPERIMENTAL DETAILS REMARK 245 RECONSTRUCTION METHOD : SINGLE PARTICLE REMARK 245 SPECIMEN TYPE : NULL REMARK 245 REMARK 245 ELECTRON MICROSCOPE SAMPLE REMARK 245 SAMPLE TYPE : PARTICLE REMARK 245 PARTICLE TYPE : POINT REMARK 245 NAME OF SAMPLE : TWO-PORE DOMAIN WEAK INWARDLY REMARK 245 RECTIFYING K+ CHANNEL 2 (TWIK2) REMARK 245 SAMPLE CONCENTRATION (MG ML-1) : 2.30 REMARK 245 SAMPLE SUPPORT DETAILS : 15 MA CURRENT REMARK 245 SAMPLE VITRIFICATION DETAILS : NULL REMARK 245 SAMPLE BUFFER : NULL REMARK 245 PH : 7.50 REMARK 245 SAMPLE DETAILS : FULL LENGTH HUMAN TWIK2 REMARK 245 EXPRESSED AS RECOMBINANT PROTEIN IN MAMALIAN CELLS. REMARK 245 REMARK 245 DATA ACQUISITION REMARK 245 DATE OF EXPERIMENT : NULL REMARK 245 NUMBER OF MICROGRAPHS-IMAGES : NULL REMARK 245 TEMPERATURE (KELVIN) : NULL REMARK 245 MICROSCOPE MODEL : TFS KRIOS REMARK 245 DETECTOR TYPE : GATAN K3 BIOCONTINUUM (6K X REMARK 245 4K) REMARK 245 MINIMUM DEFOCUS (NM) : 800.00 REMARK 245 MAXIMUM DEFOCUS (NM) : 2500.00 REMARK 245 MINIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 MAXIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 NOMINAL CS : 2.70 REMARK 245 IMAGING MODE : BRIGHT FIELD REMARK 245 ELECTRON DOSE (ELECTRONS NM**-2) : 6000.00 REMARK 245 ILLUMINATION MODE : FLOOD BEAM REMARK 245 NOMINAL MAGNIFICATION : NULL REMARK 245 CALIBRATED MAGNIFICATION : NULL REMARK 245 SOURCE : FIELD EMISSION GUN REMARK 245 ACCELERATION VOLTAGE (KV) : 300 REMARK 245 IMAGING DETAILS : NULL REMARK 247 REMARK 247 ELECTRON MICROSCOPY REMARK 247 THE COORDINATES IN THIS ENTRY WERE GENERATED FROM ELECTRON REMARK 247 MICROSCOPY DATA. PROTEIN DATA BANK CONVENTIONS REQUIRE REMARK 247 THAT CRYST1 AND SCALE RECORDS BE INCLUDED, BUT THE VALUES REMARK 247 ON THESE RECORDS ARE MEANINGLESS EXCEPT FOR THE CALCULATION REMARK 247 OF THE STRUCTURE FACTORS. 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 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 MET A 1 REMARK 465 ARG A 2 REMARK 465 ARG A 3 REMARK 465 GLY A 4 REMARK 465 VAL A 75 REMARK 465 VAL A 76 REMARK 465 LEU A 77 REMARK 465 ALA A 78 REMARK 465 ASN A 79 REMARK 465 ALA A 80 REMARK 465 SER A 81 REMARK 465 GLY A 82 REMARK 465 SER A 83 REMARK 465 ALA A 84 REMARK 465 ASN A 85 REMARK 465 ALA A 86 REMARK 465 SER A 87 REMARK 465 ASP A 88 REMARK 465 PRO A 89 REMARK 465 THR A 150 REMARK 465 HIS A 151 REMARK 465 VAL A 152 REMARK 465 PRO A 153 REMARK 465 LEU A 154 REMARK 465 SER A 155 REMARK 465 TRP A 156 REMARK 465 LEU A 157 REMARK 465 SER A 158 REMARK 465 MET A 159 REMARK 465 ARG A 160 REMARK 465 TRP A 161 REMARK 465 GLY A 162 REMARK 465 TRP A 163 REMARK 465 ASP A 164 REMARK 465 PRO A 165 REMARK 465 ARG A 166 REMARK 465 ARG A 167 REMARK 465 ALA A 168 REMARK 465 ALA A 169 REMARK 465 CYS A 170 REMARK 465 TRP A 171 REMARK 465 LEU A 262 REMARK 465 HIS A 263 REMARK 465 GLY A 264 REMARK 465 LEU A 265 REMARK 465 THR A 266 REMARK 465 GLU A 267 REMARK 465 LEU A 268 REMARK 465 ILE A 269 REMARK 465 LEU A 270 REMARK 465 LEU A 271 REMARK 465 PRO A 272 REMARK 465 PRO A 273 REMARK 465 PRO A 274 REMARK 465 CYS A 275 REMARK 465 PRO A 276 REMARK 465 ALA A 277 REMARK 465 SER A 278 REMARK 465 PHE A 279 REMARK 465 ASN A 280 REMARK 465 ALA A 281 REMARK 465 ASP A 282 REMARK 465 GLU A 283 REMARK 465 ASP A 284 REMARK 465 ASP A 285 REMARK 465 ARG A 286 REMARK 465 VAL A 287 REMARK 465 ASP A 288 REMARK 465 ILE A 289 REMARK 465 LEU A 290 REMARK 465 GLY A 291 REMARK 465 PRO A 292 REMARK 465 GLN A 293 REMARK 465 PRO A 294 REMARK 465 GLU A 295 REMARK 465 SER A 296 REMARK 465 HIS A 297 REMARK 465 GLN A 298 REMARK 465 GLN A 299 REMARK 465 LEU A 300 REMARK 465 SER A 301 REMARK 465 ALA A 302 REMARK 465 SER A 303 REMARK 465 SER A 304 REMARK 465 HIS A 305 REMARK 465 THR A 306 REMARK 465 ASP A 307 REMARK 465 TYR A 308 REMARK 465 ALA A 309 REMARK 465 SER A 310 REMARK 465 ILE A 311 REMARK 465 PRO A 312 REMARK 465 ARG A 313 REMARK 465 MET B 1 REMARK 465 ARG B 2 REMARK 465 ARG B 3 REMARK 465 GLY B 4 REMARK 465 VAL B 75 REMARK 465 VAL B 76 REMARK 465 LEU B 77 REMARK 465 ALA B 78 REMARK 465 ASN B 79 REMARK 465 ALA B 80 REMARK 465 SER B 81 REMARK 465 GLY B 82 REMARK 465 SER B 83 REMARK 465 ALA B 84 REMARK 465 ASN B 85 REMARK 465 ALA B 86 REMARK 465 SER B 87 REMARK 465 ASP B 88 REMARK 465 PRO B 89 REMARK 465 THR B 150 REMARK 465 HIS B 151 REMARK 465 VAL B 152 REMARK 465 PRO B 153 REMARK 465 LEU B 154 REMARK 465 SER B 155 REMARK 465 TRP B 156 REMARK 465 LEU B 157 REMARK 465 SER B 158 REMARK 465 MET B 159 REMARK 465 ARG B 160 REMARK 465 TRP B 161 REMARK 465 GLY B 162 REMARK 465 TRP B 163 REMARK 465 ASP B 164 REMARK 465 PRO B 165 REMARK 465 ARG B 166 REMARK 465 ARG B 167 REMARK 465 ALA B 168 REMARK 465 ALA B 169 REMARK 465 CYS B 170 REMARK 465 TRP B 171 REMARK 465 LEU B 262 REMARK 465 HIS B 263 REMARK 465 GLY B 264 REMARK 465 LEU B 265 REMARK 465 THR B 266 REMARK 465 GLU B 267 REMARK 465 LEU B 268 REMARK 465 ILE B 269 REMARK 465 LEU B 270 REMARK 465 LEU B 271 REMARK 465 PRO B 272 REMARK 465 PRO B 273 REMARK 465 PRO B 274 REMARK 465 CYS B 275 REMARK 465 PRO B 276 REMARK 465 ALA B 277 REMARK 465 SER B 278 REMARK 465 PHE B 279 REMARK 465 ASN B 280 REMARK 465 ALA B 281 REMARK 465 ASP B 282 REMARK 465 GLU B 283 REMARK 465 ASP B 284 REMARK 465 ASP B 285 REMARK 465 ARG B 286 REMARK 465 VAL B 287 REMARK 465 ASP B 288 REMARK 465 ILE B 289 REMARK 465 LEU B 290 REMARK 465 GLY B 291 REMARK 465 PRO B 292 REMARK 465 GLN B 293 REMARK 465 PRO B 294 REMARK 465 GLU B 295 REMARK 465 SER B 296 REMARK 465 HIS B 297 REMARK 465 GLN B 298 REMARK 465 GLN B 299 REMARK 465 LEU B 300 REMARK 465 SER B 301 REMARK 465 ALA B 302 REMARK 465 SER B 303 REMARK 465 SER B 304 REMARK 465 HIS B 305 REMARK 465 THR B 306 REMARK 465 ASP B 307 REMARK 465 TYR B 308 REMARK 465 ALA B 309 REMARK 465 SER B 310 REMARK 465 ILE B 311 REMARK 465 PRO B 312 REMARK 465 ARG B 313 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 LEU A 48 CG CD1 CD2 REMARK 470 GLN A 49 CG CD OE1 NE2 REMARK 470 ARG A 50 CG CD NE CZ NH1 NH2 REMARK 470 LEU B 48 CG CD1 CD2 REMARK 470 GLN B 49 CG CD OE1 NE2 REMARK 470 ARG B 50 CG CD NE CZ NH1 NH2 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 THR A 106 OG1 - CB - CG2 ANGL. DEV. = -16.1 DEGREES REMARK 500 THR B 106 OG1 - CB - CG2 ANGL. DEV. = -16.0 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 ARG A 50 53.95 -68.10 REMARK 500 ALA A 69 -71.46 -127.01 REMARK 500 ASP A 92 -155.44 -96.77 REMARK 500 TYR A 109 -71.36 -92.29 REMARK 500 VAL A 179 -67.48 -90.10 REMARK 500 ALA A 198 62.82 -100.16 REMARK 500 LEU A 217 -75.37 -76.97 REMARK 500 ARG B 50 53.92 -68.05 REMARK 500 ALA B 69 -71.45 -127.07 REMARK 500 ASP B 92 -155.42 -96.80 REMARK 500 TYR B 109 -71.33 -92.31 REMARK 500 VAL B 179 -67.53 -90.07 REMARK 500 ALA B 198 62.85 -100.19 REMARK 500 LEU B 217 -75.42 -77.03 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: PLANAR GROUPS REMARK 500 REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS REMARK 500 AN RMSD GREATER THAN THIS VALUE REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 M RES CSSEQI RMS TYPE REMARK 500 ARG A 71 0.19 SIDE CHAIN REMARK 500 ARG B 71 0.19 SIDE CHAIN 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 B 401 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 THR A 106 O REMARK 620 2 THR A 214 O 82.0 REMARK 620 3 THR B 106 O 141.5 94.7 REMARK 620 4 THR B 214 O 69.5 148.3 99.0 REMARK 620 N 1 2 3 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 K A 406 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 VAL A 107 O REMARK 620 2 GLY A 108 O 76.4 REMARK 620 3 ILE A 215 O 81.4 121.6 REMARK 620 4 GLY A 216 O 104.5 73.9 60.7 REMARK 620 5 ILE B 215 O 100.4 121.2 115.5 153.6 REMARK 620 6 GLY B 216 O 144.3 88.5 133.2 101.9 60.3 REMARK 620 N 1 2 3 4 5 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 K A 407 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLY A 108 O REMARK 620 2 TYR A 109 O 66.3 REMARK 620 3 GLY A 216 O 58.5 101.1 REMARK 620 4 LEU A 217 O 101.5 78.8 63.5 REMARK 620 5 TYR B 109 O 161.7 131.0 107.3 79.4 REMARK 620 6 GLY B 216 O 70.9 116.2 94.2 156.0 100.7 REMARK 620 7 LEU B 217 O 108.5 85.6 159.6 136.8 81.3 65.8 REMARK 620 N 1 2 3 4 5 6 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-47768 RELATED DB: EMDB REMARK 900 CRYO-EM STRUCTURE OF THE HUMAN TWO PORE DOMAIN POTASSIUM ION REMARK 900 CHANNEL K2P6 (TWIK2) DBREF 9E94 A 1 313 UNP Q9Y257 KCNK6_HUMAN 1 313 DBREF 9E94 B 1 313 UNP Q9Y257 KCNK6_HUMAN 1 313 SEQRES 1 A 313 MET ARG ARG GLY ALA LEU LEU ALA GLY ALA LEU ALA ALA SEQRES 2 A 313 TYR ALA ALA TYR LEU VAL LEU GLY ALA LEU LEU VAL ALA SEQRES 3 A 313 ARG LEU GLU GLY PRO HIS GLU ALA ARG LEU ARG ALA GLU SEQRES 4 A 313 LEU GLU THR LEU ARG ALA GLN LEU LEU GLN ARG SER PRO SEQRES 5 A 313 CYS VAL ALA ALA PRO ALA LEU ASP ALA PHE VAL GLU ARG SEQRES 6 A 313 VAL LEU ALA ALA GLY ARG LEU GLY ARG VAL VAL LEU ALA SEQRES 7 A 313 ASN ALA SER GLY SER ALA ASN ALA SER ASP PRO ALA TRP SEQRES 8 A 313 ASP PHE ALA SER ALA LEU PHE PHE ALA SER THR LEU ILE SEQRES 9 A 313 THR THR VAL GLY TYR GLY TYR THR THR PRO LEU THR ASP SEQRES 10 A 313 ALA GLY LYS ALA PHE SER ILE ALA PHE ALA LEU LEU GLY SEQRES 11 A 313 VAL PRO THR THR MET LEU LEU LEU THR ALA SER ALA GLN SEQRES 12 A 313 ARG LEU SER LEU LEU LEU THR HIS VAL PRO LEU SER TRP SEQRES 13 A 313 LEU SER MET ARG TRP GLY TRP ASP PRO ARG ARG ALA ALA SEQRES 14 A 313 CYS TRP HIS LEU VAL ALA LEU LEU GLY VAL VAL VAL THR SEQRES 15 A 313 VAL CYS PHE LEU VAL PRO ALA VAL ILE PHE ALA HIS LEU SEQRES 16 A 313 GLU GLU ALA TRP SER PHE LEU ASP ALA PHE TYR PHE CYS SEQRES 17 A 313 PHE ILE SER LEU SER THR ILE GLY LEU GLY ASP TYR VAL SEQRES 18 A 313 PRO GLY GLU ALA PRO GLY GLN PRO TYR ARG ALA LEU TYR SEQRES 19 A 313 LYS VAL LEU VAL THR VAL TYR LEU PHE LEU GLY LEU VAL SEQRES 20 A 313 ALA MET VAL LEU VAL LEU GLN THR PHE ARG HIS VAL SER SEQRES 21 A 313 ASP LEU HIS GLY LEU THR GLU LEU ILE LEU LEU PRO PRO SEQRES 22 A 313 PRO CYS PRO ALA SER PHE ASN ALA ASP GLU ASP ASP ARG SEQRES 23 A 313 VAL ASP ILE LEU GLY PRO GLN PRO GLU SER HIS GLN GLN SEQRES 24 A 313 LEU SER ALA SER SER HIS THR ASP TYR ALA SER ILE PRO SEQRES 25 A 313 ARG SEQRES 1 B 313 MET ARG ARG GLY ALA LEU LEU ALA GLY ALA LEU ALA ALA SEQRES 2 B 313 TYR ALA ALA TYR LEU VAL LEU GLY ALA LEU LEU VAL ALA SEQRES 3 B 313 ARG LEU GLU GLY PRO HIS GLU ALA ARG LEU ARG ALA GLU SEQRES 4 B 313 LEU GLU THR LEU ARG ALA GLN LEU LEU GLN ARG SER PRO SEQRES 5 B 313 CYS VAL ALA ALA PRO ALA LEU ASP ALA PHE VAL GLU ARG SEQRES 6 B 313 VAL LEU ALA ALA GLY ARG LEU GLY ARG VAL VAL LEU ALA SEQRES 7 B 313 ASN ALA SER GLY SER ALA ASN ALA SER ASP PRO ALA TRP SEQRES 8 B 313 ASP PHE ALA SER ALA LEU PHE PHE ALA SER THR LEU ILE SEQRES 9 B 313 THR THR VAL GLY TYR GLY TYR THR THR PRO LEU THR ASP SEQRES 10 B 313 ALA GLY LYS ALA PHE SER ILE ALA PHE ALA LEU LEU GLY SEQRES 11 B 313 VAL PRO THR THR MET LEU LEU LEU THR ALA SER ALA GLN SEQRES 12 B 313 ARG LEU SER LEU LEU LEU THR HIS VAL PRO LEU SER TRP SEQRES 13 B 313 LEU SER MET ARG TRP GLY TRP ASP PRO ARG ARG ALA ALA SEQRES 14 B 313 CYS TRP HIS LEU VAL ALA LEU LEU GLY VAL VAL VAL THR SEQRES 15 B 313 VAL CYS PHE LEU VAL PRO ALA VAL ILE PHE ALA HIS LEU SEQRES 16 B 313 GLU GLU ALA TRP SER PHE LEU ASP ALA PHE TYR PHE CYS SEQRES 17 B 313 PHE ILE SER LEU SER THR ILE GLY LEU GLY ASP TYR VAL SEQRES 18 B 313 PRO GLY GLU ALA PRO GLY GLN PRO TYR ARG ALA LEU TYR SEQRES 19 B 313 LYS VAL LEU VAL THR VAL TYR LEU PHE LEU GLY LEU VAL SEQRES 20 B 313 ALA MET VAL LEU VAL LEU GLN THR PHE ARG HIS VAL SER SEQRES 21 B 313 ASP LEU HIS GLY LEU THR GLU LEU ILE LEU LEU PRO PRO SEQRES 22 B 313 PRO CYS PRO ALA SER PHE ASN ALA ASP GLU ASP ASP ARG SEQRES 23 B 313 VAL ASP ILE LEU GLY PRO GLN PRO GLU SER HIS GLN GLN SEQRES 24 B 313 LEU SER ALA SER SER HIS THR ASP TYR ALA SER ILE PRO SEQRES 25 B 313 ARG HET D10 A 401 10 HET D10 A 402 10 HET D10 A 403 10 HET D10 A 404 10 HET D10 A 405 10 HET K A 406 1 HET K A 407 1 HET K B 401 1 HET D10 B 402 10 HET D10 B 403 10 HETNAM D10 DECANE HETNAM K POTASSIUM ION FORMUL 3 D10 7(C10 H22) FORMUL 8 K 3(K 1+) HELIX 1 1 ALA A 8 ARG A 37 1 30 HELIX 2 2 ALA A 38 LEU A 48 1 11 HELIX 3 3 ALA A 56 LEU A 67 1 12 HELIX 4 4 ASP A 92 THR A 105 1 14 HELIX 5 5 THR A 116 GLY A 130 1 15 HELIX 6 6 VAL A 131 LEU A 149 1 19 HELIX 7 7 HIS A 172 VAL A 179 1 8 HELIX 8 8 VAL A 180 PHE A 185 1 6 HELIX 9 9 VAL A 187 GLU A 196 1 10 HELIX 10 10 SER A 200 SER A 213 1 14 HELIX 11 11 ARG A 231 ARG A 257 1 27 HELIX 12 12 ALA B 8 ARG B 37 1 30 HELIX 13 13 ALA B 38 LEU B 48 1 11 HELIX 14 14 ALA B 56 LEU B 67 1 12 HELIX 15 15 ASP B 92 THR B 105 1 14 HELIX 16 16 THR B 116 GLY B 130 1 15 HELIX 17 17 VAL B 131 LEU B 149 1 19 HELIX 18 18 HIS B 172 VAL B 179 1 8 HELIX 19 19 VAL B 180 PHE B 185 1 6 HELIX 20 20 VAL B 187 GLU B 196 1 10 HELIX 21 21 SER B 200 SER B 213 1 14 HELIX 22 22 ARG B 231 ARG B 257 1 27 LINK O THR A 106 K K B 401 1555 1555 3.29 LINK O VAL A 107 K K A 406 1555 1555 2.05 LINK O GLY A 108 K K A 406 1555 1555 2.41 LINK O GLY A 108 K K A 407 1555 1555 3.42 LINK O TYR A 109 K K A 407 1555 1555 2.72 LINK O THR A 214 K K B 401 1555 1555 2.38 LINK O ILE A 215 K K A 406 1555 1555 2.84 LINK O GLY A 216 K K A 406 1555 1555 2.93 LINK O GLY A 216 K K A 407 1555 1555 3.18 LINK O LEU A 217 K K A 407 1555 1555 2.34 LINK K K A 406 O ILE B 215 1555 1555 2.75 LINK K K A 406 O GLY B 216 1555 1555 3.03 LINK K K A 407 O TYR B 109 1555 1555 2.77 LINK K K A 407 O GLY B 216 1555 1555 3.15 LINK K K A 407 O LEU B 217 1555 1555 2.12 LINK O THR B 106 K K B 401 1555 1555 2.25 LINK O THR B 214 K K B 401 1555 1555 2.71 CRYST1 1.000 1.000 1.000 90.00 90.00 90.00 P 1 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 1.000000 0.000000 0.000000 0.00000 SCALE2 0.000000 1.000000 0.000000 0.00000 SCALE3 0.000000 0.000000 1.000000 0.00000 CONECT 633 3363 CONECT 640 3361 CONECT 647 3361 3362 CONECT 651 3362 CONECT 1285 3363 CONECT 1292 3361 CONECT 1300 3361 3362 CONECT 1304 3362 CONECT 2288 3363 CONECT 2306 3362 CONECT 2940 3363 CONECT 2947 3361 CONECT 2955 3361 3362 CONECT 2959 3362 CONECT 3311 3312 CONECT 3312 3311 3313 CONECT 3313 3312 3314 CONECT 3314 3313 3315 CONECT 3315 3314 3316 CONECT 3316 3315 3317 CONECT 3317 3316 3318 CONECT 3318 3317 3319 CONECT 3319 3318 3320 CONECT 3320 3319 CONECT 3321 3322 CONECT 3322 3321 3323 CONECT 3323 3322 3324 CONECT 3324 3323 3325 CONECT 3325 3324 3326 CONECT 3326 3325 3327 CONECT 3327 3326 3328 CONECT 3328 3327 3329 CONECT 3329 3328 3330 CONECT 3330 3329 CONECT 3331 3332 CONECT 3332 3331 3333 CONECT 3333 3332 3334 CONECT 3334 3333 3335 CONECT 3335 3334 3336 CONECT 3336 3335 3337 CONECT 3337 3336 3338 CONECT 3338 3337 3339 CONECT 3339 3338 3340 CONECT 3340 3339 CONECT 3341 3342 CONECT 3342 3341 3343 CONECT 3343 3342 3344 CONECT 3344 3343 3345 CONECT 3345 3344 3346 CONECT 3346 3345 3347 CONECT 3347 3346 3348 CONECT 3348 3347 3349 CONECT 3349 3348 3350 CONECT 3350 3349 CONECT 3351 3352 CONECT 3352 3351 3353 CONECT 3353 3352 3354 CONECT 3354 3353 3355 CONECT 3355 3354 3356 CONECT 3356 3355 3357 CONECT 3357 3356 3358 CONECT 3358 3357 3359 CONECT 3359 3358 3360 CONECT 3360 3359 CONECT 3361 640 647 1292 1300 CONECT 3361 2947 2955 CONECT 3362 647 651 1300 1304 CONECT 3362 2306 2955 2959 CONECT 3363 633 1285 2288 2940 CONECT 3364 3365 CONECT 3365 3364 3366 CONECT 3366 3365 3367 CONECT 3367 3366 3368 CONECT 3368 3367 3369 CONECT 3369 3368 3370 CONECT 3370 3369 3371 CONECT 3371 3370 3372 CONECT 3372 3371 3373 CONECT 3373 3372 CONECT 3374 3375 CONECT 3375 3374 3376 CONECT 3376 3375 3377 CONECT 3377 3376 3378 CONECT 3378 3377 3379 CONECT 3379 3378 3380 CONECT 3380 3379 3381 CONECT 3381 3380 3382 CONECT 3382 3381 3383 CONECT 3383 3382 MASTER 413 0 10 22 0 0 0 6 3381 2 89 50 END