HEADER SIGNALING PROTEIN 20-MAY-25 9OQ0 TITLE STRUCTURE OF THE SWEET RECEPTOR BOUND TO SUCRALOSE IN THE COMPACT TITLE 2 STATE, TRANSMEMBRANE DOMAIN COMPND MOL_ID: 1; COMPND 2 MOLECULE: TASTE RECEPTOR TYPE 1 MEMBER 2; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: G-PROTEIN COUPLED RECEPTOR 71,SWEET TASTE RECEPTOR T1R2; COMPND 5 ENGINEERED: YES; COMPND 6 MOL_ID: 2; COMPND 7 MOLECULE: TASTE RECEPTOR TYPE 1 MEMBER 3; COMPND 8 CHAIN: B; COMPND 9 SYNONYM: SACCHARIN PREFERENCE PROTEIN,SWEET TASTE RECEPTOR T1R3; COMPND 10 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: TAS1R2, GPR71, T1R2, TR2; SOURCE 6 EXPRESSION_SYSTEM: HOMO SAPIENS; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 9606; SOURCE 8 MOL_ID: 2; SOURCE 9 ORGANISM_SCIENTIFIC: MUS MUSCULUS; SOURCE 10 ORGANISM_COMMON: HOUSE MOUSE; SOURCE 11 ORGANISM_TAXID: 10090; SOURCE 12 GENE: TAS1R3, SAC, T1R3, TR3; SOURCE 13 EXPRESSION_SYSTEM: HOMO SAPIENS; SOURCE 14 EXPRESSION_SYSTEM_TAXID: 9606 KEYWDS MEMBRANE PROTEIN, GPCR, SIGNALING PROTEIN EXPDTA ELECTRON MICROSCOPY AUTHOR H.WANG,X.CHEN,Y.DAI,C.H.LEE REVDAT 2 19-NOV-25 9OQ0 1 JRNL REVDAT 1 27-AUG-25 9OQ0 0 JRNL AUTH H.WANG,X.CHEN,Y.DAI,S.PIDATHALA,Y.NIU,C.ZHAO,S.LI,L.WANG, JRNL AUTH 2 C.H.LEE JRNL TITL STRUCTURE AND ACTIVATION MECHANISM OF HUMAN SWEET TASTE JRNL TITL 2 RECEPTOR. JRNL REF CELL RES. V. 35 775 2025 JRNL REFN ISSN 1001-0602 JRNL PMID 40754567 JRNL DOI 10.1038/S41422-025-01156-X REMARK 2 REMARK 2 RESOLUTION. 3.67 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 SOFTWARE PACKAGES : 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 : NULL 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 : 168365 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 9OQ0 COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 21-MAY-25. REMARK 100 THE DEPOSITION ID IS D_1000296066. 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 : HUMAN TAS1R2 AND MOUSE TAS1R3 REMARK 245 SWEET RECEPTOR BOUND TO REMARK 245 SUCRALOSE REMARK 245 SAMPLE CONCENTRATION (MG ML-1) : NULL REMARK 245 SAMPLE SUPPORT DETAILS : NULL REMARK 245 SAMPLE VITRIFICATION DETAILS : NULL REMARK 245 SAMPLE BUFFER : NULL REMARK 245 PH : 7.00 REMARK 245 SAMPLE DETAILS : NULL 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 (6K X 4K) REMARK 245 MINIMUM DEFOCUS (NM) : 1100.00 REMARK 245 MAXIMUM DEFOCUS (NM) : 2100.00 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) : 6160.00 REMARK 245 ILLUMINATION MODE : OTHER 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 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 ALA A 635 -51.37 -120.46 REMARK 500 TYR A 675 -27.74 75.94 REMARK 500 GLN A 676 -51.70 -136.74 REMARK 500 PRO A 713 3.58 -67.69 REMARK 500 ASN A 721 78.97 -162.21 REMARK 500 HIS B 598 55.14 -109.07 REMARK 500 GLU B 668 -33.01 -133.03 REMARK 500 LEU B 825 56.98 -146.63 REMARK 500 REMARK 500 REMARK: NULL REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-70732 RELATED DB: EMDB REMARK 900 STRUCTURE OF THE SWEET RECEPTOR BOUND TO SUCRALOSE IN THE COMPACT REMARK 900 STATE, TRANSMEMBRANE DOMAIN DBREF 9OQ0 A 554 831 UNP Q8TE23 TS1R2_HUMAN 554 831 DBREF 9OQ0 B 561 835 UNP Q925D8 TS1R3_MOUSE 561 835 SEQRES 1 A 278 ARG GLN LEU VAL PHE LEU GLU TRP HIS GLU ALA PRO THR SEQRES 2 A 278 ILE ALA VAL ALA LEU LEU ALA ALA LEU GLY PHE LEU SER SEQRES 3 A 278 THR LEU ALA ILE LEU VAL ILE PHE TRP ARG HIS PHE GLN SEQRES 4 A 278 THR PRO ILE VAL ARG SER ALA GLY GLY PRO MET CYS PHE SEQRES 5 A 278 LEU MET LEU THR LEU LEU LEU VAL ALA TYR MET VAL VAL SEQRES 6 A 278 PRO VAL TYR VAL GLY PRO PRO LYS VAL SER THR CYS LEU SEQRES 7 A 278 CYS ARG GLN ALA LEU PHE PRO LEU CYS PHE THR ILE CYS SEQRES 8 A 278 ILE SER CYS ILE ALA VAL ARG SER PHE GLN ILE VAL CYS SEQRES 9 A 278 ALA PHE LYS MET ALA SER ARG PHE PRO ARG ALA TYR SER SEQRES 10 A 278 TYR TRP VAL ARG TYR GLN GLY PRO TYR VAL SER MET ALA SEQRES 11 A 278 PHE ILE THR VAL LEU LYS MET VAL ILE VAL VAL ILE GLY SEQRES 12 A 278 MET LEU ALA THR GLY LEU SER PRO THR THR ARG THR ASP SEQRES 13 A 278 PRO ASP ASP PRO LYS ILE THR ILE VAL SER CYS ASN PRO SEQRES 14 A 278 ASN TYR ARG ASN SER LEU LEU PHE ASN THR SER LEU ASP SEQRES 15 A 278 LEU LEU LEU SER VAL VAL GLY PHE SER PHE ALA TYR MET SEQRES 16 A 278 GLY LYS GLU LEU PRO THR ASN TYR ASN GLU ALA LYS PHE SEQRES 17 A 278 ILE THR LEU SER MET THR PHE TYR PHE THR SER SER VAL SEQRES 18 A 278 SER LEU CYS THR PHE MET SER ALA TYR SER GLY VAL LEU SEQRES 19 A 278 VAL THR ILE VAL ASP LEU LEU VAL THR VAL LEU ASN LEU SEQRES 20 A 278 LEU ALA ILE SER LEU GLY TYR PHE GLY PRO LYS CYS TYR SEQRES 21 A 278 MET ILE LEU PHE TYR PRO GLU ARG ASN THR PRO ALA TYR SEQRES 22 A 278 PHE ASN SER MET ILE SEQRES 1 B 275 PRO ARG ARG PRO LYS PHE LEU ALA TRP GLY GLU PRO VAL SEQRES 2 B 275 VAL LEU SER LEU LEU LEU LEU LEU CYS LEU VAL LEU GLY SEQRES 3 B 275 LEU ALA LEU ALA ALA LEU GLY LEU SER VAL HIS HIS TRP SEQRES 4 B 275 ASP SER PRO LEU VAL GLN ALA SER GLY GLY SER GLN PHE SEQRES 5 B 275 CYS PHE GLY LEU ILE CYS LEU GLY LEU PHE CYS LEU SER SEQRES 6 B 275 VAL LEU LEU PHE PRO GLY ARG PRO SER SER ALA SER CYS SEQRES 7 B 275 LEU ALA GLN GLN PRO MET ALA HIS LEU PRO LEU THR GLY SEQRES 8 B 275 CYS LEU SER THR LEU PHE LEU GLN ALA ALA GLU THR PHE SEQRES 9 B 275 VAL GLU SER GLU LEU PRO LEU SER TRP ALA ASN TRP LEU SEQRES 10 B 275 CYS SER TYR LEU ARG GLY LEU TRP ALA TRP LEU VAL VAL SEQRES 11 B 275 LEU LEU ALA THR PHE VAL GLU ALA ALA LEU CYS ALA TRP SEQRES 12 B 275 TYR LEU ILE ALA PHE PRO PRO GLU VAL VAL THR ASP TRP SEQRES 13 B 275 SER VAL LEU PRO THR GLU VAL LEU GLU HIS CYS HIS VAL SEQRES 14 B 275 ARG SER TRP VAL SER LEU GLY LEU VAL HIS ILE THR ASN SEQRES 15 B 275 ALA MET LEU ALA PHE LEU CYS PHE LEU GLY THR PHE LEU SEQRES 16 B 275 VAL GLN SER GLN PRO GLY ARG TYR ASN ARG ALA ARG GLY SEQRES 17 B 275 LEU THR PHE ALA MET LEU ALA TYR PHE ILE THR TRP VAL SEQRES 18 B 275 SER PHE VAL PRO LEU LEU ALA ASN VAL GLN VAL ALA TYR SEQRES 19 B 275 GLN PRO ALA VAL GLN MET GLY ALA ILE LEU VAL CYS ALA SEQRES 20 B 275 LEU GLY ILE LEU VAL THR PHE HIS LEU PRO LYS CYS TYR SEQRES 21 B 275 VAL LEU LEU TRP LEU PRO LYS LEU ASN THR GLN GLU PHE SEQRES 22 B 275 PHE LEU HELIX 1 AA1 GLU A 563 TRP A 588 1 26 HELIX 2 AA2 THR A 593 GLY A 600 1 8 HELIX 3 AA3 GLY A 601 TYR A 615 1 15 HELIX 4 AA4 MET A 616 VAL A 622 1 7 HELIX 5 AA5 LYS A 626 ALA A 635 1 10 HELIX 6 AA6 ALA A 635 VAL A 656 1 22 HELIX 7 AA7 CYS A 657 PHE A 665 1 9 HELIX 8 AA8 PHE A 665 VAL A 673 1 9 HELIX 9 AA9 PRO A 678 GLY A 701 1 24 HELIX 10 AB1 ASN A 723 GLY A 749 1 27 HELIX 11 AB2 PRO A 753 TYR A 783 1 31 HELIX 12 AB3 LEU A 787 LEU A 816 1 30 HELIX 13 AB4 THR A 823 ILE A 831 5 9 HELIX 14 AB5 GLU B 571 HIS B 598 1 28 HELIX 15 AB6 SER B 601 SER B 607 1 7 HELIX 16 AB7 GLY B 609 LEU B 624 1 16 HELIX 17 AB8 SER B 625 PHE B 629 5 5 HELIX 18 AB9 SER B 634 GLU B 668 1 35 HELIX 19 AC1 PRO B 670 ARG B 682 1 13 HELIX 20 AC2 GLY B 683 PHE B 708 1 26 HELIX 21 AC3 SER B 731 PHE B 754 1 24 HELIX 22 AC4 ASN B 764 VAL B 790 1 27 HELIX 23 AC5 GLN B 791 ALA B 793 5 3 HELIX 24 AC6 TYR B 794 HIS B 815 1 22 HELIX 25 AC7 HIS B 815 LEU B 825 1 11 HELIX 26 AC8 PRO B 826 ASN B 829 5 4 HELIX 27 AC9 THR B 830 LEU B 835 1 6 SHEET 1 AA1 3 GLN A 555 VAL A 557 0 SHEET 2 AA1 3 ILE A 715 SER A 719 1 O THR A 716 N GLN A 555 SHEET 3 AA1 3 THR A 705 THR A 708 -1 N THR A 705 O SER A 719 SHEET 1 AA2 3 ARG B 563 LYS B 565 0 SHEET 2 AA2 3 GLU B 722 HIS B 728 1 O GLU B 725 N LYS B 565 SHEET 3 AA2 3 GLU B 711 ASP B 715 -1 N VAL B 713 O HIS B 726 SSBOND 1 CYS A 630 CYS A 720 1555 1555 2.03 SSBOND 2 CYS B 638 CYS B 727 1555 1555 2.03 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 TER 2184 ILE A 831 TER 4331 LEU B 835 CONECT 598 1301 CONECT 1301 598 CONECT 2762 3468 CONECT 3468 2762 MASTER 127 0 0 27 6 0 0 6 4329 2 4 44 END