HEADER TRANSFERASE 11-MAY-26 26QI TITLE CRYO-EM STRUCTURE OF HUMAN UGCG BOUND TO IBIGLUSTAT COMPND MOL_ID: 1; COMPND 2 MOLECULE: CERAMIDE GLUCOSYLTRANSFERASE; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: GLCT-1,GLUCOSYLCERAMIDE SYNTHASE,GCS,GLYCOSYLCERAMIDE COMPND 5 SYNTHASE,UDP-GLUCOSE CERAMIDE GLUCOSYLTRANSFERASE,UDP-GLUCOSE:N- COMPND 6 ACYLSPHINGOSINE D-GLUCOSYLTRANSFERASE; COMPND 7 EC: 2.4.1.80; COMPND 8 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: UGCG; SOURCE 6 EXPRESSION_SYSTEM: HOMO SAPIENS; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 9606 KEYWDS CERAMIDE GLUCOSYLTRANSFERASE; UGCG;IBIGLUSTAT, TRANSFERASE EXPDTA ELECTRON MICROSCOPY AUTHOR C.WU,S.JIN,J.XU,J.J.WANG,X.GUO,Y.LI,Z.CAO,M.JIANG,Q.YUAN,W.HU,C.LI, AUTHOR 2 Y.XU,M.W.WANG,Y.JIANG,H.E.XU REVDAT 1 02-SEP-26 26QI 0 JRNL AUTH C.WU,S.JIN,J.XU,J.J.WANG,X.GUO,Y.LI,Z.CAO,M.JIANG,Q.YUAN, JRNL AUTH 2 W.HU,C.LI,Y.XU,M.W.WANG,Y.JIANG,H.E.XU JRNL TITL PRIMATE-SPECIFIC REGULATION OF THE HUMAN GLYCOSPHINGOLIPID JRNL TITL 2 GATEKEEPER UGCG JRNL REF NATURE 2026 JRNL REFN ESSN 1476-4687 JRNL DOI 10.1038/S41586-026-10927-4 REMARK 2 REMARK 2 RESOLUTION. 3.43 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 SOFTWARE PACKAGES : CRYOSPARC, PHENIX, 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 : 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) : 3.430 REMARK 3 NUMBER OF PARTICLES : 56198 REMARK 3 CTF CORRECTION METHOD : NONE REMARK 3 REMARK 3 EM RECONSTRUCTION MAGNIFICATION CALIBRATION: NULL REMARK 3 REMARK 3 OTHER DETAILS: NULL REMARK 4 REMARK 4 26QI COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBC ON 15-MAY-26. REMARK 100 THE DEPOSITION ID IS D_1300074122. 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 : CERAMIDE GLUCOSYLTRANSFERASE 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 : 7.50 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 : FEI TALOS ARCTICA REMARK 245 DETECTOR TYPE : GATAN K3 (6K X 4K) REMARK 245 MINIMUM DEFOCUS (NM) : 1200.00 REMARK 245 MAXIMUM DEFOCUS (NM) : 5000.00 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) : 5000.00 REMARK 245 ILLUMINATION MODE : OTHER REMARK 245 NOMINAL MAGNIFICATION : NULL REMARK 245 CALIBRATED MAGNIFICATION : NULL REMARK 245 SOURCE : OTHER 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: MONOMERIC 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 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 GLU A 389 REMARK 465 GLU A 390 REMARK 465 ILE A 391 REMARK 465 LEU A 392 REMARK 465 ASP A 393 REMARK 465 VAL A 394 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 ALA A 388 CB 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 VAL A 310 -62.72 -108.11 REMARK 500 REMARK 500 REMARK: NULL REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-80826 RELATED DB: EMDB REMARK 900 CRYO-EM STRUCTURE OF HUMAN UGCG BOUND TO IBIGLUSTAT DBREF 26QI A 1 394 UNP Q16739 CEGT_HUMAN 1 394 SEQRES 1 A 394 MET ALA LEU LEU ASP LEU ALA LEU GLU GLY MET ALA VAL SEQRES 2 A 394 PHE GLY PHE VAL LEU PHE LEU VAL LEU TRP LEU MET HIS SEQRES 3 A 394 PHE MET ALA ILE ILE TYR THR ARG LEU HIS LEU ASN LYS SEQRES 4 A 394 LYS ALA THR ASP LYS GLN PRO TYR SER LYS LEU PRO GLY SEQRES 5 A 394 VAL SER LEU LEU LYS PRO LEU LYS GLY VAL ASP PRO ASN SEQRES 6 A 394 LEU ILE ASN ASN LEU GLU THR PHE PHE GLU LEU ASP TYR SEQRES 7 A 394 PRO LYS TYR GLU VAL LEU LEU CYS VAL GLN ASP HIS ASP SEQRES 8 A 394 ASP PRO ALA ILE ASP VAL CYS LYS LYS LEU LEU GLY LYS SEQRES 9 A 394 TYR PRO ASN VAL ASP ALA ARG LEU PHE ILE GLY GLY LYS SEQRES 10 A 394 LYS VAL GLY ILE ASN PRO LYS ILE ASN ASN LEU MET PRO SEQRES 11 A 394 GLY TYR GLU VAL ALA LYS TYR ASP LEU ILE TRP ILE CYS SEQRES 12 A 394 ASP SER GLY ILE ARG VAL ILE PRO ASP THR LEU THR ASP SEQRES 13 A 394 MET VAL ASN GLN MET THR GLU LYS VAL GLY LEU VAL HIS SEQRES 14 A 394 GLY LEU PRO TYR VAL ALA ASP ARG GLN GLY PHE ALA ALA SEQRES 15 A 394 THR LEU GLU GLN VAL TYR PHE GLY THR SER HIS PRO ARG SEQRES 16 A 394 TYR TYR ILE SER ALA ASN VAL THR GLY PHE LYS CYS VAL SEQRES 17 A 394 THR GLY MET SER CYS LEU MET ARG LYS ASP VAL LEU ASP SEQRES 18 A 394 GLN ALA GLY GLY LEU ILE ALA PHE ALA GLN TYR ILE ALA SEQRES 19 A 394 GLU ASP TYR PHE MET ALA LYS ALA ILE ALA ASP ARG GLY SEQRES 20 A 394 TRP ARG PHE ALA MET SER THR GLN VAL ALA MET GLN ASN SEQRES 21 A 394 SER GLY SER TYR SER ILE SER GLN PHE GLN SER ARG MET SEQRES 22 A 394 ILE ARG TRP THR LYS LEU ARG ILE ASN MET LEU PRO ALA SEQRES 23 A 394 THR ILE ILE CYS GLU PRO ILE SER GLU CYS PHE VAL ALA SEQRES 24 A 394 SER LEU ILE ILE GLY TRP ALA ALA HIS HIS VAL PHE ARG SEQRES 25 A 394 TRP ASP ILE MET VAL PHE PHE MET CYS HIS CYS LEU ALA SEQRES 26 A 394 TRP PHE ILE PHE ASP TYR ILE GLN LEU ARG GLY VAL GLN SEQRES 27 A 394 GLY GLY THR LEU CYS PHE SER LYS LEU ASP TYR ALA VAL SEQRES 28 A 394 ALA TRP PHE ILE ARG GLU SER MET THR ILE TYR ILE PHE SEQRES 29 A 394 LEU SER ALA LEU TRP ASP PRO THR ILE SER TRP ARG THR SEQRES 30 A 394 GLY ARG TYR ARG LEU ARG CYS GLY GLY THR ALA GLU GLU SEQRES 31 A 394 ILE LEU ASP VAL HET KYF A 401 27 HETNAM KYF (1R,3S,4R)-1-AZABICYCLO[2.2.2]OCTAN-3-YL {2-[2-(4- HETNAM 2 KYF FLUOROPHENYL)-1,3-THIAZOL-4-YL]PROPAN-2-YL}CARBAMATE FORMUL 2 KYF C20 H24 F N3 O2 S HELIX 1 AA1 ALA A 2 HIS A 36 1 35 HELIX 2 AA2 ASN A 65 GLU A 75 1 11 HELIX 3 AA3 PRO A 93 TYR A 105 1 13 HELIX 4 AA4 ASN A 122 VAL A 134 1 13 HELIX 5 AA5 ASP A 152 GLN A 160 1 9 HELIX 6 AA6 GLY A 179 SER A 192 1 14 HELIX 7 AA7 SER A 192 THR A 203 1 12 HELIX 8 AA8 LYS A 217 ALA A 223 1 7 HELIX 9 AA9 GLY A 224 PHE A 229 1 6 HELIX 10 AB1 ALA A 234 ARG A 246 1 13 HELIX 11 AB2 SER A 265 LEU A 284 1 20 HELIX 12 AB3 ALA A 286 SER A 294 1 9 HELIX 13 AB4 GLU A 295 PHE A 311 1 17 HELIX 14 AB5 ASP A 314 GLY A 339 1 26 HELIX 15 AB6 SER A 345 ASP A 370 1 26 SHEET 1 AA1 8 ALA A 110 ILE A 114 0 SHEET 2 AA1 8 TYR A 81 VAL A 87 1 N LEU A 85 O PHE A 113 SHEET 3 AA1 8 VAL A 53 LEU A 59 1 N LEU A 55 O LEU A 84 SHEET 4 AA1 8 LEU A 139 CYS A 143 1 O TRP A 141 N SER A 54 SHEET 5 AA1 8 SER A 212 ARG A 216 -1 O MET A 215 N ILE A 140 SHEET 6 AA1 8 VAL A 165 VAL A 174 -1 N VAL A 168 O LEU A 214 SHEET 7 AA1 8 ARG A 249 GLN A 259 1 O GLN A 259 N TYR A 173 SHEET 8 AA1 8 ILE A 147 ARG A 148 -1 N ARG A 148 O MET A 258 SSBOND 1 CYS A 296 CYS A 323 1555 1555 2.04 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 2339 2566 CONECT 2566 2339 CONECT 3105 3119 3120 CONECT 3106 3107 3114 CONECT 3107 3106 3108 3121 3122 CONECT 3108 3107 CONECT 3109 3122 3131 CONECT 3110 3111 3123 3125 CONECT 3111 3110 3124 CONECT 3112 3113 3124 3126 CONECT 3113 3112 3125 CONECT 3114 3106 3129 3130 CONECT 3115 3116 3119 3130 CONECT 3116 3115 3127 CONECT 3117 3118 3127 CONECT 3118 3117 3119 CONECT 3119 3105 3115 3118 CONECT 3120 3105 3127 CONECT 3121 3107 CONECT 3122 3107 3109 3128 CONECT 3123 3110 3128 3131 CONECT 3124 3111 3112 CONECT 3125 3110 3113 CONECT 3126 3112 CONECT 3127 3116 3117 3120 CONECT 3128 3122 3123 CONECT 3129 3114 CONECT 3130 3114 3115 CONECT 3131 3109 3123 MASTER 134 0 1 15 8 0 0 6 3130 1 29 31 END