HEADER MEMBRANE PROTEIN 25-JUL-24 9G9V TITLE STRUCTURE OF THE HUMAN TWO PORE DOMAIN POTASSIUM ION CHANNEL TASK-3 TITLE 2 (K2P9.1) COMPND MOL_ID: 1; COMPND 2 MOLECULE: POTASSIUM CHANNEL SUBFAMILY K MEMBER 9; COMPND 3 CHAIN: A, B; COMPND 4 SYNONYM: ACID-SENSITIVE POTASSIUM CHANNEL PROTEIN TASK-3,TWIK-RELATED COMPND 5 ACID-SENSITIVE K(+) CHANNEL 3,TWO PORE POTASSIUM CHANNEL KT3.2,TWO COMPND 6 PORE K(+) CHANNEL KT3.2; COMPND 7 ENGINEERED: YES; COMPND 8 OTHER_DETAILS: M1 TO D259, WITH A HRV 3C PROTEASE SITE. FUSED COMPND 9 PURIFICATION TAGS WERE CLEAVED PRIOR TO EM SAMPLE PREPARATION. SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606; SOURCE 5 GENE: KCNK9, TASK3; 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: BACMID; SOURCE 10 EXPRESSION_SYSTEM_PLASMID: PFB-C3C10HF-LIC KEYWDS K2P, MEMBRANE PROTEIN, POTASSIUM CHANNEL, ION CHANNEL EXPDTA ELECTRON MICROSCOPY AUTHOR P.H.HALL,K.E.J.RODSTROM,S.J.TUCKER REVDAT 2 15-JAN-25 9G9V 1 JRNL REVDAT 1 18-DEC-24 9G9V 0 JRNL AUTH P.R.HALL,T.JOUEN-TACHOIRE,M.SCHEWE,P.PROKS,T.BAUKROWITZ, JRNL AUTH 2 E.P.CARPENTER,S.NEWSTEAD,K.E.J.RODSTROM,S.J.TUCKER JRNL TITL STRUCTURES OF TASK-1 AND TASK-3 K2P CHANNELS PROVIDE INSIGHT JRNL TITL 2 INTO THEIR GATING AND DYSFUNCTION IN DISEASE. JRNL REF STRUCTURE V. 33 115 2025 JRNL REFN ISSN 0969-2126 JRNL PMID 39637865 JRNL DOI 10.1016/J.STR.2024.11.005 REMARK 2 REMARK 2 RESOLUTION. 3.32 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) : 3.320 REMARK 3 NUMBER OF PARTICLES : 93760 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 9G9V COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 25-JUL-24. REMARK 100 THE DEPOSITION ID IS D_1292140611. 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 : K2P9.1 HOMODIMER REMARK 245 SAMPLE CONCENTRATION (MG ML-1) : 8.00 REMARK 245 SAMPLE SUPPORT DETAILS : NULL REMARK 245 SAMPLE VITRIFICATION DETAILS : GRID BLOTTED FOR 3 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 3C PROTEASE CLEAVAGE REMARK 245 REMARK 245 DATA ACQUISITION REMARK 245 DATE OF EXPERIMENT : NULL REMARK 245 NUMBER OF MICROGRAPHS-IMAGES : 21363 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) : 1200.00 REMARK 245 MAXIMUM DEFOCUS (NM) : 2700.00 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) : 3956.00 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 LEU A 262 REMARK 465 GLU A 263 REMARK 465 VAL A 264 REMARK 465 LEU A 265 REMARK 465 PHE A 266 REMARK 465 GLN A 267 REMARK 465 LEU B 262 REMARK 465 GLU B 263 REMARK 465 VAL B 264 REMARK 465 LEU B 265 REMARK 465 PHE B 266 REMARK 465 GLN B 267 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 MET A 1 CG SD CE REMARK 470 GLU A 37 CG CD OE1 OE2 REMARK 470 GLU A 39 CG CD OE1 OE2 REMARK 470 LYS A 42 CG CD CE NZ REMARK 470 GLU A 44 CG CD OE1 OE2 REMARK 470 LYS A 51 CG CD CE NZ REMARK 470 SER A 55 OG REMARK 470 GLU A 57 CG CD OE1 OE2 REMARK 470 ASP A 58 CG OD1 OD2 REMARK 470 ARG A 60 CG CD NE CZ NH1 NH2 REMARK 470 GLU A 63 CG CD OE1 OE2 REMARK 470 GLU A 70 CG CD OE1 OE2 REMARK 470 ARG A 73 CG CD NE CZ NH1 NH2 REMARK 470 GLU A 130 CG CD OE1 OE2 REMARK 470 LEU A 139 CG CD1 CD2 REMARK 470 ILE A 143 CG1 CG2 CD1 REMARK 470 CYS A 147 SG REMARK 470 MET A 149 CG SD CE REMARK 470 ARG A 150 CG CD NE CZ NH1 NH2 REMARK 470 ASP A 153 CG OD1 OD2 REMARK 470 GLU A 157 CG CD OE1 OE2 REMARK 470 GLU A 183 CG CD OE1 OE2 REMARK 470 THR A 210 OG1 CG2 REMARK 470 LYS A 211 CG CD CE NZ REMARK 470 LEU A 219 CG CD1 CD2 REMARK 470 GLU A 252 CG CD OE1 OE2 REMARK 470 ASP A 253 CG OD1 OD2 REMARK 470 ASP A 257 CG OD1 OD2 REMARK 470 GLU A 259 CG CD OE1 OE2 REMARK 470 GLU A 261 CG CD OE1 OE2 REMARK 470 MET B 1 CG SD CE REMARK 470 GLU B 37 CG CD OE1 OE2 REMARK 470 GLU B 39 CG CD OE1 OE2 REMARK 470 LYS B 42 CG CD CE NZ REMARK 470 GLU B 44 CG CD OE1 OE2 REMARK 470 LYS B 51 CG CD CE NZ REMARK 470 SER B 55 OG REMARK 470 GLU B 57 CG CD OE1 OE2 REMARK 470 ASP B 58 CG OD1 OD2 REMARK 470 ARG B 60 CG CD NE CZ NH1 NH2 REMARK 470 GLU B 63 CG CD OE1 OE2 REMARK 470 GLU B 70 CG CD OE1 OE2 REMARK 470 ARG B 73 CG CD NE CZ NH1 NH2 REMARK 470 GLU B 130 CG CD OE1 OE2 REMARK 470 LEU B 139 CG CD1 CD2 REMARK 470 ILE B 143 CG1 CG2 CD1 REMARK 470 CYS B 147 SG REMARK 470 MET B 149 CG SD CE REMARK 470 ARG B 150 CG CD NE CZ NH1 NH2 REMARK 470 ASP B 153 CG OD1 OD2 REMARK 470 GLU B 157 CG CD OE1 OE2 REMARK 470 GLU B 183 CG CD OE1 OE2 REMARK 470 THR B 210 OG1 CG2 REMARK 470 LYS B 211 CG CD CE NZ REMARK 470 LEU B 219 CG CD1 CD2 REMARK 470 GLU B 252 CG CD OE1 OE2 REMARK 470 ASP B 253 CG OD1 OD2 REMARK 470 ASP B 257 CG OD1 OD2 REMARK 470 GLU B 259 CG CD OE1 OE2 REMARK 470 GLU B 261 CG CD OE1 OE2 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 30 16.36 -152.13 REMARK 500 LEU A 208 -25.76 70.85 REMARK 500 LYS A 211 47.15 36.42 REMARK 500 GLU B 30 16.36 -152.13 REMARK 500 LEU B 208 -25.78 70.85 REMARK 500 LYS B 211 47.15 36.42 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 306 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 THR A 93 O REMARK 620 2 ILE A 94 O 63.0 REMARK 620 3 THR A 199 O 73.1 84.5 REMARK 620 4 ILE A 200 O 120.8 70.1 68.3 REMARK 620 5 THR B 93 O 127.0 157.6 80.6 88.8 REMARK 620 6 ILE B 94 O 157.6 116.4 129.1 76.2 63.0 REMARK 620 7 THR B 199 O 80.6 129.1 119.1 158.1 73.1 84.5 REMARK 620 8 ILE B 200 O 88.8 76.2 158.1 113.3 120.8 70.1 68.3 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 307 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 THR A 93 O REMARK 620 2 THR A 93 OG1 55.2 REMARK 620 3 THR A 199 O 72.9 100.7 REMARK 620 4 THR A 199 OG1 97.0 76.6 53.6 REMARK 620 5 THR B 93 O 120.4 174.4 80.3 108.1 REMARK 620 6 THR B 93 OG1 174.4 129.4 102.3 82.0 55.2 REMARK 620 7 THR B 199 O 80.3 102.3 124.5 177.2 72.9 100.7 REMARK 620 8 THR B 199 OG1 108.1 82.0 177.2 128.5 97.0 76.6 53.6 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 305 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 ILE A 94 O REMARK 620 2 GLY A 95 O 66.4 REMARK 620 3 ILE A 200 O 79.5 125.6 REMARK 620 4 GLY A 201 O 79.4 68.5 64.4 REMARK 620 5 ILE B 94 O 140.5 145.2 86.9 127.0 REMARK 620 6 GLY B 95 O 145.2 102.9 81.6 66.1 66.4 REMARK 620 7 ILE B 200 O 86.9 81.6 139.0 150.0 79.5 125.6 REMARK 620 8 GLY B 201 O 127.0 66.1 150.0 103.4 79.4 68.5 64.4 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 304 K REMARK 620 N RES CSSEQI ATOM REMARK 620 1 GLY A 95 O REMARK 620 2 TYR A 96 O 64.6 REMARK 620 3 GLY A 201 O 82.2 90.7 REMARK 620 4 PHE A 202 O 121.5 67.4 66.8 REMARK 620 5 GLY B 95 O 133.4 156.4 79.1 89.0 REMARK 620 6 TYR B 96 O 156.4 103.9 119.7 66.3 64.6 REMARK 620 7 GLY B 201 O 79.1 119.7 131.4 156.8 82.2 90.7 REMARK 620 8 PHE B 202 O 89.0 66.3 156.8 100.6 121.5 67.4 66.8 REMARK 620 N 1 2 3 4 5 6 7 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-51158 RELATED DB: EMDB REMARK 900 STRUCTURE OF THE HUMAN TWO PORE DOMAIN POTASSIUM ION CHANNEL TASK-3 REMARK 900 (K2P9.1) DBREF 9G9V A 1 259 UNP Q9NPC2 KCNK9_HUMAN 1 259 DBREF 9G9V B 1 259 UNP Q9NPC2 KCNK9_HUMAN 1 259 SEQADV 9G9V ALA A 260 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V GLU A 261 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V LEU A 262 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V GLU A 263 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V VAL A 264 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V LEU A 265 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V PHE A 266 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V GLN A 267 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V ALA B 260 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V GLU B 261 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V LEU B 262 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V GLU B 263 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V VAL B 264 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V LEU B 265 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V PHE B 266 UNP Q9NPC2 EXPRESSION TAG SEQADV 9G9V GLN B 267 UNP Q9NPC2 EXPRESSION TAG SEQRES 1 A 267 MET LYS ARG GLN ASN VAL ARG THR LEU SER LEU ILE VAL SEQRES 2 A 267 CYS THR PHE THR TYR LEU LEU VAL GLY ALA ALA VAL PHE SEQRES 3 A 267 ASP ALA LEU GLU SER ASP HIS GLU MET ARG GLU GLU GLU SEQRES 4 A 267 LYS LEU LYS ALA GLU GLU ILE ARG ILE LYS GLY LYS TYR SEQRES 5 A 267 ASN ILE SER SER GLU ASP TYR ARG GLN LEU GLU LEU VAL SEQRES 6 A 267 ILE LEU GLN SER GLU PRO HIS ARG ALA GLY VAL GLN TRP SEQRES 7 A 267 LYS PHE ALA GLY SER PHE TYR PHE ALA ILE THR VAL ILE SEQRES 8 A 267 THR THR ILE GLY TYR GLY HIS ALA ALA PRO GLY THR ASP SEQRES 9 A 267 ALA GLY LYS ALA PHE CYS MET PHE TYR ALA VAL LEU GLY SEQRES 10 A 267 ILE PRO LEU THR LEU VAL MET PHE GLN SER LEU GLY GLU SEQRES 11 A 267 ARG MET ASN THR PHE VAL ARG TYR LEU LEU LYS ARG ILE SEQRES 12 A 267 LYS LYS CYS CYS GLY MET ARG ASN THR ASP VAL SER MET SEQRES 13 A 267 GLU ASN MET VAL THR VAL GLY PHE PHE SER CYS MET GLY SEQRES 14 A 267 THR LEU CYS ILE GLY ALA ALA ALA PHE SER GLN CYS GLU SEQRES 15 A 267 GLU TRP SER PHE PHE HIS ALA TYR TYR TYR CYS PHE ILE SEQRES 16 A 267 THR LEU THR THR ILE GLY PHE GLY ASP TYR VAL ALA LEU SEQRES 17 A 267 GLN THR LYS GLY ALA LEU GLN LYS LYS PRO LEU TYR VAL SEQRES 18 A 267 ALA PHE SER PHE MET TYR ILE LEU VAL GLY LEU THR VAL SEQRES 19 A 267 ILE GLY ALA PHE LEU ASN LEU VAL VAL LEU ARG PHE LEU SEQRES 20 A 267 THR MET ASN SER GLU ASP GLU ARG ARG ASP ALA GLU ALA SEQRES 21 A 267 GLU LEU GLU VAL LEU PHE GLN SEQRES 1 B 267 MET LYS ARG GLN ASN VAL ARG THR LEU SER LEU ILE VAL SEQRES 2 B 267 CYS THR PHE THR TYR LEU LEU VAL GLY ALA ALA VAL PHE SEQRES 3 B 267 ASP ALA LEU GLU SER ASP HIS GLU MET ARG GLU GLU GLU SEQRES 4 B 267 LYS LEU LYS ALA GLU GLU ILE ARG ILE LYS GLY LYS TYR SEQRES 5 B 267 ASN ILE SER SER GLU ASP TYR ARG GLN LEU GLU LEU VAL SEQRES 6 B 267 ILE LEU GLN SER GLU PRO HIS ARG ALA GLY VAL GLN TRP SEQRES 7 B 267 LYS PHE ALA GLY SER PHE TYR PHE ALA ILE THR VAL ILE SEQRES 8 B 267 THR THR ILE GLY TYR GLY HIS ALA ALA PRO GLY THR ASP SEQRES 9 B 267 ALA GLY LYS ALA PHE CYS MET PHE TYR ALA VAL LEU GLY SEQRES 10 B 267 ILE PRO LEU THR LEU VAL MET PHE GLN SER LEU GLY GLU SEQRES 11 B 267 ARG MET ASN THR PHE VAL ARG TYR LEU LEU LYS ARG ILE SEQRES 12 B 267 LYS LYS CYS CYS GLY MET ARG ASN THR ASP VAL SER MET SEQRES 13 B 267 GLU ASN MET VAL THR VAL GLY PHE PHE SER CYS MET GLY SEQRES 14 B 267 THR LEU CYS ILE GLY ALA ALA ALA PHE SER GLN CYS GLU SEQRES 15 B 267 GLU TRP SER PHE PHE HIS ALA TYR TYR TYR CYS PHE ILE SEQRES 16 B 267 THR LEU THR THR ILE GLY PHE GLY ASP TYR VAL ALA LEU SEQRES 17 B 267 GLN THR LYS GLY ALA LEU GLN LYS LYS PRO LEU TYR VAL SEQRES 18 B 267 ALA PHE SER PHE MET TYR ILE LEU VAL GLY LEU THR VAL SEQRES 19 B 267 ILE GLY ALA PHE LEU ASN LEU VAL VAL LEU ARG PHE LEU SEQRES 20 B 267 THR MET ASN SER GLU ASP GLU ARG ARG ASP ALA GLU ALA SEQRES 21 B 267 GLU LEU GLU VAL LEU PHE GLN HET Y01 A 301 35 HET Y01 A 302 35 HET K A 303 1 HET K A 304 1 HET K A 305 1 HET K A 306 1 HET K A 307 1 HET Y01 B 301 35 HET Y01 B 302 35 HETNAM Y01 CHOLESTEROL HEMISUCCINATE HETNAM K POTASSIUM ION FORMUL 3 Y01 4(C31 H50 O4) FORMUL 5 K 5(K 1+) HELIX 1 AA1 MET A 1 TYR A 52 1 52 HELIX 2 AA2 SER A 55 ALA A 74 1 20 HELIX 3 AA3 LYS A 79 THR A 92 1 14 HELIX 4 AA4 THR A 103 CYS A 147 1 45 HELIX 5 AA5 SER A 155 GLU A 183 1 29 HELIX 6 AA6 SER A 185 THR A 198 1 14 HELIX 7 AA7 GLY A 212 LYS A 217 1 6 HELIX 8 AA8 LYS A 217 VAL A 243 1 27 HELIX 9 AA9 VAL A 243 ALA A 260 1 18 HELIX 10 AB1 LYS B 2 TYR B 52 1 51 HELIX 11 AB2 SER B 55 ALA B 74 1 20 HELIX 12 AB3 LYS B 79 THR B 92 1 14 HELIX 13 AB4 THR B 103 CYS B 147 1 45 HELIX 14 AB5 SER B 155 GLU B 183 1 29 HELIX 15 AB6 SER B 185 THR B 198 1 14 HELIX 16 AB7 GLY B 212 LYS B 217 1 6 HELIX 17 AB8 LYS B 217 VAL B 243 1 27 HELIX 18 AB9 VAL B 243 ALA B 260 1 18 LINK O THR A 93 K K A 306 1555 1555 2.89 LINK O THR A 93 K K A 307 1555 1555 2.98 LINK OG1 THR A 93 K K A 307 1555 1555 3.27 LINK O ILE A 94 K K A 305 1555 1555 2.79 LINK O ILE A 94 K K A 306 1555 1555 3.09 LINK O GLY A 95 K K A 304 1555 1555 2.71 LINK O GLY A 95 K K A 305 1555 1555 3.18 LINK O TYR A 96 K K A 304 1555 1555 3.35 LINK O THR A 199 K K A 306 1555 1555 2.89 LINK O THR A 199 K K A 307 1555 1555 2.81 LINK OG1 THR A 199 K K A 307 1555 1555 3.44 LINK O ILE A 200 K K A 305 1555 1555 2.66 LINK O ILE A 200 K K A 306 1555 1555 2.99 LINK O GLY A 201 K K A 304 1555 1555 2.70 LINK O GLY A 201 K K A 305 1555 1555 3.14 LINK O PHE A 202 K K A 304 1555 1555 3.33 LINK K K A 304 O GLY B 95 1555 1555 2.71 LINK K K A 304 O TYR B 96 1555 1555 3.35 LINK K K A 304 O GLY B 201 1555 1555 2.70 LINK K K A 304 O PHE B 202 1555 1555 3.33 LINK K K A 305 O ILE B 94 1555 1555 2.79 LINK K K A 305 O GLY B 95 1555 1555 3.18 LINK K K A 305 O ILE B 200 1555 1555 2.66 LINK K K A 305 O GLY B 201 1555 1555 3.14 LINK K K A 306 O THR B 93 1555 1555 2.89 LINK K K A 306 O ILE B 94 1555 1555 3.09 LINK K K A 306 O THR B 199 1555 1555 2.89 LINK K K A 306 O ILE B 200 1555 1555 2.99 LINK K K A 307 O THR B 93 1555 1555 2.98 LINK K K A 307 OG1 THR B 93 1555 1555 3.27 LINK K K A 307 O THR B 199 1555 1555 2.81 LINK K K A 307 OG1 THR B 199 1555 1555 3.44 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