HEADER MEMBRANE PROTEIN 24-JUN-24 9FT7 TITLE STRUCTURE OF THE HUMAN TWO PORE DOMAIN POTASSIUM ION CHANNEL THIK-1 TITLE 2 (K2P13.1) IN A CLOSED CONFORMATION COMPND MOL_ID: 1; COMPND 2 MOLECULE: POTASSIUM CHANNEL SUBFAMILY K MEMBER 13; COMPND 3 CHAIN: A, B; COMPND 4 SYNONYM: TANDEM PORE DOMAIN HALOTHANE-INHIBITED POTASSIUM CHANNEL 1, COMPND 5 THIK-1; COMPND 6 ENGINEERED: YES; COMPND 7 OTHER_DETAILS: K2P13.1 RESIDUES G9-G297 SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606; SOURCE 5 GENE: KCNK13; SOURCE 6 EXPRESSION_SYSTEM: SPODOPTERA FRUGIPERDA; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 7108; SOURCE 8 EXPRESSION_SYSTEM_CELL_LINE: SF9; SOURCE 9 EXPRESSION_SYSTEM_VECTOR_TYPE: BACULOVIRUS KEYWDS POTASSIUM CHANNEL, MEMBRANE PROTEIN EXPDTA ELECTRON MICROSCOPY AUTHOR K.E.J.RODSTROM,S.J.TUCKER REVDAT 1 05-MAR-25 9FT7 0 JRNL AUTH K.E.J.RODSTROM,B.EYMSH,P.PROKS,M.S.HAYRE,S.CORDEIRO, JRNL AUTH 2 E.MENDEZ-OTALVARO,C.MADRY,A.ROWLAND,W.KOPEC,S.NEWSTEAD, JRNL AUTH 3 T.BAUKROWITZ,M.SCHEWE,S.J.TUCKER JRNL TITL CRYO-EM STRUCTURE OF THE HUMAN THIK-1 K2P K + CHANNEL JRNL TITL 2 REVEALS A LOWER Y GATE REGULATED BY LIPIDS AND ANESTHETICS. JRNL REF NAT.STRUCT.MOL.BIOL. 2025 JRNL REFN ESSN 1545-9985 JRNL PMID 40011745 JRNL DOI 10.1038/S41594-025-01497-6 REMARK 2 REMARK 2 RESOLUTION. 3.16 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 SOFTWARE PACKAGES : CRYOSPARC, EPU, CRYOSPARC, PHENIX, REMARK 3 CRYOSPARC, CRYOSPARC, CRYOSPARC REMARK 3 RECONSTRUCTION SCHEMA : NULL REMARK 3 REMARK 3 EM MAP-MODEL FITTING AND REFINEMENT REMARK 3 PDB ENTRY : NULL REMARK 3 REFINEMENT SPACE : REAL REMARK 3 REFINEMENT PROTOCOL : FLEXIBLE FIT REMARK 3 REFINEMENT TARGET : NULL REMARK 3 OVERALL ANISOTROPIC B VALUE : NULL REMARK 3 REMARK 3 FITTING PROCEDURE : AN INITIAL MODEL WAS BUILT MANUALLY IN COOT 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) : 3.160 REMARK 3 NUMBER OF PARTICLES : 302189 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 9FT7 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 24-JUN-24. REMARK 100 THE DEPOSITION ID IS D_1292139584. 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 : K2P13.1 HOMODIMER REMARK 245 SAMPLE CONCENTRATION (MG ML-1) : 4.00 REMARK 245 SAMPLE SUPPORT DETAILS : NULL REMARK 245 SAMPLE VITRIFICATION DETAILS : GRID BLOTTED FOR 4 SECONDS REMARK 245 SAMPLE BUFFER : NULL REMARK 245 PH : 7.50 REMARK 245 SAMPLE DETAILS : PROTEIN GENERATED BY REMOVAL OF REMARK 245 THE 10XHIS AND FLAG PURIFICATION TAGS WITH HRV 3C PROTEASE REMARK 245 CLEAVAGE REMARK 245 REMARK 245 DATA ACQUISITION REMARK 245 DATE OF EXPERIMENT : NULL REMARK 245 NUMBER OF MICROGRAPHS-IMAGES : 21171 REMARK 245 TEMPERATURE (KELVIN) : NULL REMARK 245 MICROSCOPE MODEL : FEI TITAN KRIOS REMARK 245 DETECTOR TYPE : GATAN K3 BIOQUANTUM (6K X REMARK 245 4K) REMARK 245 MINIMUM DEFOCUS (NM) : 1000.00 REMARK 245 MAXIMUM DEFOCUS (NM) : 2300.00 REMARK 245 MINIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 MAXIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 NOMINAL CS : NULL REMARK 245 IMAGING MODE : BRIGHT FIELD REMARK 245 ELECTRON DOSE (ELECTRONS NM**-2) : 4254.00 REMARK 245 ILLUMINATION MODE : FLOOD BEAM REMARK 245 NOMINAL MAGNIFICATION : 105000 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 8 REMARK 465 GLY A 9 REMARK 465 PRO A 10 REMARK 465 GLY A 11 REMARK 465 HIS A 12 REMARK 465 LEU A 13 REMARK 465 ARG A 166 REMARK 465 ARG A 167 REMARK 465 ARG A 168 REMARK 465 GLY A 169 REMARK 465 ALA A 170 REMARK 465 LEU A 171 REMARK 465 PRO A 172 REMARK 465 GLN A 173 REMARK 465 GLU A 174 REMARK 465 SER A 175 REMARK 465 LEU A 176 REMARK 465 LYS A 177 REMARK 465 ASP A 178 REMARK 465 ALA A 179 REMARK 465 GLY A 180 REMARK 465 GLN A 181 REMARK 465 CYS A 182 REMARK 465 GLU A 183 REMARK 465 VAL A 184 REMARK 465 ASP A 185 REMARK 465 SER A 186 REMARK 465 LEU A 187 REMARK 465 ALA A 188 REMARK 465 GLY A 189 REMARK 465 SER A 296 REMARK 465 GLY A 297 REMARK 465 ALA A 298 REMARK 465 GLU A 299 REMARK 465 LEU A 300 REMARK 465 GLU A 301 REMARK 465 VAL A 302 REMARK 465 LEU A 303 REMARK 465 PHE A 304 REMARK 465 GLN A 305 REMARK 465 MET B 8 REMARK 465 GLY B 9 REMARK 465 PRO B 10 REMARK 465 GLY B 11 REMARK 465 HIS B 12 REMARK 465 LEU B 13 REMARK 465 ARG B 166 REMARK 465 ARG B 167 REMARK 465 ARG B 168 REMARK 465 GLY B 169 REMARK 465 ALA B 170 REMARK 465 LEU B 171 REMARK 465 PRO B 172 REMARK 465 GLN B 173 REMARK 465 GLU B 174 REMARK 465 SER B 175 REMARK 465 LEU B 176 REMARK 465 LYS B 177 REMARK 465 ASP B 178 REMARK 465 ALA B 179 REMARK 465 GLY B 180 REMARK 465 GLN B 181 REMARK 465 CYS B 182 REMARK 465 GLU B 183 REMARK 465 VAL B 184 REMARK 465 ASP B 185 REMARK 465 SER B 186 REMARK 465 LEU B 187 REMARK 465 ALA B 188 REMARK 465 GLY B 189 REMARK 465 SER B 296 REMARK 465 GLY B 297 REMARK 465 ALA B 298 REMARK 465 GLU B 299 REMARK 465 LEU B 300 REMARK 465 GLU B 301 REMARK 465 VAL B 302 REMARK 465 LEU B 303 REMARK 465 PHE B 304 REMARK 465 GLN B 305 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 ASN A 14 CG OD1 ND2 REMARK 470 GLU A 15 CG CD OE1 OE2 REMARK 470 ASP A 69 CG OD1 OD2 REMARK 470 ARG A 72 CG CD NE CZ NH1 NH2 REMARK 470 ASP A 89 CG OD1 OD2 REMARK 470 GLU A 147 CG CD OE1 OE2 REMARK 470 MET A 157 CG SD CE REMARK 470 LYS A 158 CG CD CE NZ REMARK 470 SER A 159 OG REMARK 470 CYS A 160 SG REMARK 470 HIS A 161 CG ND1 CD2 CE1 NE2 REMARK 470 GLN A 162 CG CD OE1 NE2 REMARK 470 ARG A 163 CG CD NE CZ NH1 NH2 REMARK 470 GLN A 164 CG CD OE1 NE2 REMARK 470 LEU A 165 CG CD1 CD2 REMARK 470 TRP A 190 CG CD1 CD2 NE1 CE2 CE3 CZ2 REMARK 470 TRP A 190 CZ3 CH2 REMARK 470 LYS A 191 CG CD CE NZ REMARK 470 GLU A 252 CG CD OE1 OE2 REMARK 470 ARG A 292 CG CD NE CZ NH1 NH2 REMARK 470 LYS A 293 CG CD CE NZ REMARK 470 MET A 294 CG SD CE REMARK 470 ASP A 295 CG OD1 OD2 REMARK 470 ASN B 14 CG OD1 ND2 REMARK 470 GLU B 15 CG CD OE1 OE2 REMARK 470 ASP B 69 CG OD1 OD2 REMARK 470 ARG B 72 CG CD NE CZ NH1 NH2 REMARK 470 ASP B 89 CG OD1 OD2 REMARK 470 GLU B 147 CG CD OE1 OE2 REMARK 470 MET B 157 CG SD CE REMARK 470 LYS B 158 CG CD CE NZ REMARK 470 SER B 159 OG REMARK 470 CYS B 160 SG REMARK 470 HIS B 161 CG ND1 CD2 CE1 NE2 REMARK 470 GLN B 162 CG CD OE1 NE2 REMARK 470 ARG B 163 CG CD NE CZ NH1 NH2 REMARK 470 GLN B 164 CG CD OE1 NE2 REMARK 470 LEU B 165 CG CD1 CD2 REMARK 470 TRP B 190 CG CD1 CD2 NE1 CE2 CE3 CZ2 REMARK 470 TRP B 190 CZ3 CH2 REMARK 470 LYS B 191 CG CD CE NZ REMARK 470 GLU B 252 CG CD OE1 OE2 REMARK 470 ARG B 292 CG CD NE CZ NH1 NH2 REMARK 470 LYS B 293 CG CD CE NZ REMARK 470 MET B 294 CG SD CE REMARK 470 ASP B 295 CG OD1 OD2 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 42 24.98 -144.86 REMARK 500 THR A 110 14.09 58.65 REMARK 500 GLN A 247 -30.72 -136.68 REMARK 500 GLU B 42 24.98 -144.86 REMARK 500 THR B 110 14.15 58.58 REMARK 500 GLN B 247 -30.75 -136.66 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 403 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 THR A 110 O REMARK 620 2 ILE A 111 O 66.5 REMARK 620 3 THR A 237 O 74.9 82.5 REMARK 620 4 ILE A 238 O 125.9 71.6 67.1 REMARK 620 5 THR B 110 O 123.1 153.8 77.6 85.0 REMARK 620 6 ILE B 111 O 153.8 117.0 130.6 76.7 66.5 REMARK 620 7 THR B 237 O 77.6 130.6 120.2 155.5 74.9 82.5 REMARK 620 8 ILE B 238 O 85.0 76.7 155.5 116.9 125.9 71.6 67.1 REMARK 620 N 1 2 3 4 5 6 7 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 K A 402 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLY A 112 O REMARK 620 2 PHE A 113 O 66.6 REMARK 620 3 GLY A 239 O 69.0 88.3 REMARK 620 4 PHE A 240 O 119.7 68.9 71.0 REMARK 620 5 GLY B 112 O 110.6 157.6 70.6 96.0 REMARK 620 6 PHE B 113 O 157.5 124.7 126.3 82.6 66.7 REMARK 620 7 GLY B 239 O 70.6 126.2 105.4 164.8 69.0 88.3 REMARK 620 8 PHE B 240 O 96.0 82.5 164.7 116.4 119.7 68.9 71.0 REMARK 620 N 1 2 3 4 5 6 7 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-50741 RELATED DB: EMDB REMARK 900 STRUCTURE OF THE HUMAN TWO PORE DOMAIN POTASSIUM ION CHANNEL THIK-1 REMARK 900 (K2P13.1) IN A CLOSED CONFORMATION DBREF 9FT7 A 9 297 UNP Q9HB14 KCNKD_HUMAN 9 297 DBREF 9FT7 B 9 297 UNP Q9HB14 KCNKD_HUMAN 9 297 SEQADV 9FT7 MET A 8 UNP Q9HB14 INITIATING METHIONINE SEQADV 9FT7 ALA A 298 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 GLU A 299 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 LEU A 300 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 GLU A 301 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 VAL A 302 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 LEU A 303 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 PHE A 304 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 GLN A 305 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 MET B 8 UNP Q9HB14 INITIATING METHIONINE SEQADV 9FT7 ALA B 298 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 GLU B 299 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 LEU B 300 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 GLU B 301 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 VAL B 302 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 LEU B 303 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 PHE B 304 UNP Q9HB14 EXPRESSION TAG SEQADV 9FT7 GLN B 305 UNP Q9HB14 EXPRESSION TAG SEQRES 1 A 298 MET GLY PRO GLY HIS LEU ASN GLU ASP ASN ALA ARG PHE SEQRES 2 A 298 LEU LEU LEU ALA ALA LEU ILE VAL LEU TYR LEU LEU GLY SEQRES 3 A 298 GLY ALA ALA VAL PHE SER ALA LEU GLU LEU ALA HIS GLU SEQRES 4 A 298 ARG GLN ALA LYS GLN ARG TRP GLU GLU ARG LEU ALA ASN SEQRES 5 A 298 PHE SER ARG GLY HIS ASN LEU SER ARG ASP GLU LEU ARG SEQRES 6 A 298 GLY PHE LEU ARG HIS TYR GLU GLU ALA THR ARG ALA GLY SEQRES 7 A 298 ILE ARG VAL ASP ASN VAL ARG PRO ARG TRP ASP PHE THR SEQRES 8 A 298 GLY ALA PHE TYR PHE VAL GLY THR VAL VAL SER THR ILE SEQRES 9 A 298 GLY PHE GLY MET THR THR PRO ALA THR VAL GLY GLY LYS SEQRES 10 A 298 ILE PHE LEU ILE PHE TYR GLY LEU VAL GLY CYS SER SER SEQRES 11 A 298 THR ILE LEU PHE PHE ASN LEU PHE LEU GLU ARG LEU ILE SEQRES 12 A 298 THR ILE ILE ALA TYR ILE MET LYS SER CYS HIS GLN ARG SEQRES 13 A 298 GLN LEU ARG ARG ARG GLY ALA LEU PRO GLN GLU SER LEU SEQRES 14 A 298 LYS ASP ALA GLY GLN CYS GLU VAL ASP SER LEU ALA GLY SEQRES 15 A 298 TRP LYS PRO SER VAL TYR TYR VAL MET LEU ILE LEU CYS SEQRES 16 A 298 THR ALA SER ILE LEU ILE SER CYS CYS ALA SER ALA MET SEQRES 17 A 298 TYR THR PRO ILE GLU GLY TRP SER TYR PHE ASP SER LEU SEQRES 18 A 298 TYR PHE CYS PHE VAL ALA PHE SER THR ILE GLY PHE GLY SEQRES 19 A 298 ASP LEU VAL SER SER GLN ASN ALA HIS TYR GLU SER GLN SEQRES 20 A 298 GLY LEU TYR ARG PHE ALA ASN PHE VAL PHE ILE LEU MET SEQRES 21 A 298 GLY VAL CYS CYS ILE TYR SER LEU PHE ASN VAL ILE SER SEQRES 22 A 298 ILE LEU ILE LYS GLN SER LEU ASN TRP ILE LEU ARG LYS SEQRES 23 A 298 MET ASP SER GLY ALA GLU LEU GLU VAL LEU PHE GLN SEQRES 1 B 298 MET GLY PRO GLY HIS LEU ASN GLU ASP ASN ALA ARG PHE SEQRES 2 B 298 LEU LEU LEU ALA ALA LEU ILE VAL LEU TYR LEU LEU GLY SEQRES 3 B 298 GLY ALA ALA VAL PHE SER ALA LEU GLU LEU ALA HIS GLU SEQRES 4 B 298 ARG GLN ALA LYS GLN ARG TRP GLU GLU ARG LEU ALA ASN SEQRES 5 B 298 PHE SER ARG GLY HIS ASN LEU SER ARG ASP GLU LEU ARG SEQRES 6 B 298 GLY PHE LEU ARG HIS TYR GLU GLU ALA THR ARG ALA GLY SEQRES 7 B 298 ILE ARG VAL ASP ASN VAL ARG PRO ARG TRP ASP PHE THR SEQRES 8 B 298 GLY ALA PHE TYR PHE VAL GLY THR VAL VAL SER THR ILE SEQRES 9 B 298 GLY PHE GLY MET THR THR PRO ALA THR VAL GLY GLY LYS SEQRES 10 B 298 ILE PHE LEU ILE PHE TYR GLY LEU VAL GLY CYS SER SER SEQRES 11 B 298 THR ILE LEU PHE PHE ASN LEU PHE LEU GLU ARG LEU ILE SEQRES 12 B 298 THR ILE ILE ALA TYR ILE MET LYS SER CYS HIS GLN ARG SEQRES 13 B 298 GLN LEU ARG ARG ARG GLY ALA LEU PRO GLN GLU SER LEU SEQRES 14 B 298 LYS ASP ALA GLY GLN CYS GLU VAL ASP SER LEU ALA GLY SEQRES 15 B 298 TRP LYS PRO SER VAL TYR TYR VAL MET LEU ILE LEU CYS SEQRES 16 B 298 THR ALA SER ILE LEU ILE SER CYS CYS ALA SER ALA MET SEQRES 17 B 298 TYR THR PRO ILE GLU GLY TRP SER TYR PHE ASP SER LEU SEQRES 18 B 298 TYR PHE CYS PHE VAL ALA PHE SER THR ILE GLY PHE GLY SEQRES 19 B 298 ASP LEU VAL SER SER GLN ASN ALA HIS TYR GLU SER GLN SEQRES 20 B 298 GLY LEU TYR ARG PHE ALA ASN PHE VAL PHE ILE LEU MET SEQRES 21 B 298 GLY VAL CYS CYS ILE TYR SER LEU PHE ASN VAL ILE SER SEQRES 22 B 298 ILE LEU ILE LYS GLN SER LEU ASN TRP ILE LEU ARG LYS SEQRES 23 B 298 MET ASP SER GLY ALA GLU LEU GLU VAL LEU PHE GLN HET EIC A 401 20 HET K A 402 1 HET K A 403 1 HET EIC B 401 20 HETNAM EIC LINOLEIC ACID HETNAM K POTASSIUM ION HETSYN EIC 9,12-LINOLEIC ACID FORMUL 3 EIC 2(C18 H32 O2) FORMUL 4 K 2(K 1+) HELIX 1 AA1 ASN A 14 HIS A 64 1 51 HELIX 2 AA2 SER A 67 ALA A 84 1 18 HELIX 3 AA3 ASP A 96 SER A 109 1 14 HELIX 4 AA4 THR A 120 GLN A 164 1 45 HELIX 5 AA5 SER A 193 GLY A 221 1 29 HELIX 6 AA6 SER A 223 SER A 236 1 14 HELIX 7 AA7 SER A 253 MET A 294 1 42 HELIX 8 AA8 GLU B 15 HIS B 64 1 50 HELIX 9 AA9 SER B 67 ALA B 84 1 18 HELIX 10 AB1 ASP B 96 SER B 109 1 14 HELIX 11 AB2 THR B 120 GLN B 164 1 45 HELIX 12 AB3 SER B 193 GLY B 221 1 29 HELIX 13 AB4 SER B 223 SER B 236 1 14 HELIX 14 AB5 SER B 253 MET B 294 1 42 LINK O THR A 110 K K A 403 1555 1555 2.84 LINK O ILE A 111 K K A 403 1555 1555 3.01 LINK O GLY A 112 K K A 402 1555 1555 3.03 LINK O PHE A 113 K K A 402 1555 1555 3.16 LINK O THR A 237 K K A 403 1555 1555 2.81 LINK O ILE A 238 K K A 403 1555 1555 2.93 LINK O GLY A 239 K K A 402 1555 1555 3.02 LINK O PHE A 240 K K A 402 1555 1555 2.79 LINK K K A 402 O GLY B 112 1555 1555 3.03 LINK K K A 402 O PHE B 113 1555 1555 3.16 LINK K K A 402 O GLY B 239 1555 1555 3.02 LINK K K A 402 O PHE B 240 1555 1555 2.79 LINK K K A 403 O THR B 110 1555 1555 2.84 LINK K K A 403 O ILE B 111 1555 1555 3.01 LINK K K A 403 O THR B 237 1555 1555 2.81 LINK K K A 403 O ILE B 238 1555 1555 2.93 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