HEADER PROTEIN FIBRIL 21-APR-25 9ULZ TITLE CRYO-EM STRUCTURE OF HIAPP FIBRILS EXTRACTED FROM A DONOR WITH T2D AND TITLE 2 PANCREATIC CANCER COMPND MOL_ID: 1; COMPND 2 MOLECULE: ISLET AMYLOID POLYPEPTIDE; COMPND 3 CHAIN: A, B, C, D, E, F, G, H, I, J, K, L; COMPND 4 SYNONYM: IAPP,AMYLIN,DIABETES-ASSOCIATED PEPTIDE,DAP,INSULINOMA COMPND 5 AMYLOID PEPTIDE SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606 KEYWDS AMYLOID FIBRILS, TYPE II DIABETES, HIAPP, PROTEIN FIBRIL EXPDTA ELECTRON MICROSCOPY AUTHOR Q.CAO,W.LIU,J.HAN REVDAT 1 14-JAN-26 9ULZ 0 JRNL AUTH W.LIU,J.HAN,W.GONG,F.ZHANG,Q.CAO JRNL TITL STRUCTURE OF PANCREATIC HIAPP FIBRILS DERIVED FROM PATIENTS JRNL TITL 2 WITH TYPE 2 DIABETES. JRNL REF CELL 2026 JRNL REFN ISSN 1097-4172 JRNL PMID 41483806 JRNL DOI 10.1016/J.CELL.2025.12.001 REMARK 2 REMARK 2 RESOLUTION. 2.90 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 : REAL REMARK 3 REFINEMENT PROTOCOL : AB INITIO MODEL 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) : 2.900 REMARK 3 NUMBER OF PARTICLES : 19086 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 9ULZ COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBC ON 25-APR-25. REMARK 100 THE DEPOSITION ID IS D_1300058710. REMARK 245 REMARK 245 EXPERIMENTAL DETAILS REMARK 245 RECONSTRUCTION METHOD : HELICAL REMARK 245 SPECIMEN TYPE : NULL REMARK 245 REMARK 245 ELECTRON MICROSCOPE SAMPLE REMARK 245 SAMPLE TYPE : FILAMENT REMARK 245 PARTICLE TYPE : HELICAL REMARK 245 NAME OF SAMPLE : HIAPP FIBRILS 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 : 7.40 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 : FEI FALCON IV (4K X 4K) REMARK 245 MINIMUM DEFOCUS (NM) : 800.00 REMARK 245 MAXIMUM DEFOCUS (NM) : 3500.00 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) : 4000.00 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: DODECAMERIC REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C, D, E, F, G, H, I, J, REMARK 350 AND CHAINS: K, L 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 LYS A 1 REMARK 465 LYS B 1 REMARK 465 LYS C 1 REMARK 465 LYS D 1 REMARK 465 LYS E 1 REMARK 465 LYS F 1 REMARK 465 LYS G 1 REMARK 465 LYS H 1 REMARK 465 LYS I 1 REMARK 465 LYS J 1 REMARK 465 LYS K 1 REMARK 465 LYS L 1 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 THR A 4 29.90 -142.50 REMARK 500 THR B 4 29.81 -142.40 REMARK 500 ALA B 25 65.59 60.02 REMARK 500 THR C 4 29.86 -142.42 REMARK 500 ALA C 25 65.68 60.02 REMARK 500 THR D 4 29.86 -142.41 REMARK 500 ALA D 25 65.67 60.00 REMARK 500 THR E 4 29.93 -142.45 REMARK 500 THR F 4 29.83 -142.41 REMARK 500 THR G 4 29.89 -142.43 REMARK 500 THR H 4 29.79 -142.41 REMARK 500 THR I 4 29.81 -142.45 REMARK 500 ALA I 25 65.66 60.03 REMARK 500 THR J 4 29.81 -142.45 REMARK 500 ALA J 25 65.66 60.03 REMARK 500 THR K 4 29.81 -142.38 REMARK 500 THR L 4 29.81 -142.38 REMARK 500 REMARK 500 REMARK: NULL REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-64268 RELATED DB: EMDB REMARK 900 CRYO-EM STRUCTURE OF HIAPP FIBRILS EXTRACTED FROM A DONOR WITH T2D REMARK 900 AND PANCREATIC CANCER DBREF 9ULZ A 1 37 UNP P10997 IAPP_HUMAN 34 70 DBREF 9ULZ B 1 37 UNP P10997 IAPP_HUMAN 34 70 DBREF 9ULZ C 1 37 UNP P10997 IAPP_HUMAN 34 70 DBREF 9ULZ D 1 37 UNP P10997 IAPP_HUMAN 34 70 DBREF 9ULZ E 1 37 UNP P10997 IAPP_HUMAN 34 70 DBREF 9ULZ F 1 37 UNP P10997 IAPP_HUMAN 34 70 DBREF 9ULZ G 1 37 UNP P10997 IAPP_HUMAN 34 70 DBREF 9ULZ H 1 37 UNP P10997 IAPP_HUMAN 34 70 DBREF 9ULZ I 1 37 UNP P10997 IAPP_HUMAN 34 70 DBREF 9ULZ J 1 37 UNP P10997 IAPP_HUMAN 34 70 DBREF 9ULZ K 1 37 UNP P10997 IAPP_HUMAN 34 70 DBREF 9ULZ L 1 37 UNP P10997 IAPP_HUMAN 34 70 SEQRES 1 A 37 LYS CYS ASN THR ALA THR CYS ALA THR GLN ARG LEU ALA SEQRES 2 A 37 ASN PHE LEU VAL HIS SER SER ASN ASN PHE GLY ALA ILE SEQRES 3 A 37 LEU SER SER THR ASN VAL GLY SER ASN THR TYR SEQRES 1 B 37 LYS CYS ASN THR ALA THR CYS ALA THR GLN ARG LEU ALA SEQRES 2 B 37 ASN PHE LEU VAL HIS SER SER ASN ASN PHE GLY ALA ILE SEQRES 3 B 37 LEU SER SER THR ASN VAL GLY SER ASN THR TYR SEQRES 1 C 37 LYS CYS ASN THR ALA THR CYS ALA THR GLN ARG LEU ALA SEQRES 2 C 37 ASN PHE LEU VAL HIS SER SER ASN ASN PHE GLY ALA ILE SEQRES 3 C 37 LEU SER SER THR ASN VAL GLY SER ASN THR TYR SEQRES 1 D 37 LYS CYS ASN THR ALA THR CYS ALA THR GLN ARG LEU ALA SEQRES 2 D 37 ASN PHE LEU VAL HIS SER SER ASN ASN PHE GLY ALA ILE SEQRES 3 D 37 LEU SER SER THR ASN VAL GLY SER ASN THR TYR SEQRES 1 E 37 LYS CYS ASN THR ALA THR CYS ALA THR GLN ARG LEU ALA SEQRES 2 E 37 ASN PHE LEU VAL HIS SER SER ASN ASN PHE GLY ALA ILE SEQRES 3 E 37 LEU SER SER THR ASN VAL GLY SER ASN THR TYR SEQRES 1 F 37 LYS CYS ASN THR ALA THR CYS ALA THR GLN ARG LEU ALA SEQRES 2 F 37 ASN PHE LEU VAL HIS SER SER ASN ASN PHE GLY ALA ILE SEQRES 3 F 37 LEU SER SER THR ASN VAL GLY SER ASN THR TYR SEQRES 1 G 37 LYS CYS ASN THR ALA THR CYS ALA THR GLN ARG LEU ALA SEQRES 2 G 37 ASN PHE LEU VAL HIS SER SER ASN ASN PHE GLY ALA ILE SEQRES 3 G 37 LEU SER SER THR ASN VAL GLY SER ASN THR TYR SEQRES 1 H 37 LYS CYS ASN THR ALA THR CYS ALA THR GLN ARG LEU ALA SEQRES 2 H 37 ASN PHE LEU VAL HIS SER SER ASN ASN PHE GLY ALA ILE SEQRES 3 H 37 LEU SER SER THR ASN VAL GLY SER ASN THR TYR SEQRES 1 I 37 LYS CYS ASN THR ALA THR CYS ALA THR GLN ARG LEU ALA SEQRES 2 I 37 ASN PHE LEU VAL HIS SER SER ASN ASN PHE GLY ALA ILE SEQRES 3 I 37 LEU SER SER THR ASN VAL GLY SER ASN THR TYR SEQRES 1 J 37 LYS CYS ASN THR ALA THR CYS ALA THR GLN ARG LEU ALA SEQRES 2 J 37 ASN PHE LEU VAL HIS SER SER ASN ASN PHE GLY ALA ILE SEQRES 3 J 37 LEU SER SER THR ASN VAL GLY SER ASN THR TYR SEQRES 1 K 37 LYS CYS ASN THR ALA THR CYS ALA THR GLN ARG LEU ALA SEQRES 2 K 37 ASN PHE LEU VAL HIS SER SER ASN ASN PHE GLY ALA ILE SEQRES 3 K 37 LEU SER SER THR ASN VAL GLY SER ASN THR TYR SEQRES 1 L 37 LYS CYS ASN THR ALA THR CYS ALA THR GLN ARG LEU ALA SEQRES 2 L 37 ASN PHE LEU VAL HIS SER SER ASN ASN PHE GLY ALA ILE SEQRES 3 L 37 LEU SER SER THR ASN VAL GLY SER ASN THR TYR SHEET 1 AA1 6 ALA G 8 HIS G 18 0 SHEET 2 AA1 6 ALA E 8 HIS E 18 1 N LEU E 16 O VAL G 17 SHEET 3 AA1 6 ALA C 8 HIS C 18 1 N LEU C 16 O VAL E 17 SHEET 4 AA1 6 ALA A 8 HIS A 18 1 N LEU A 16 O VAL C 17 SHEET 5 AA1 6 ALA K 8 HIS K 18 1 O LEU K 16 N VAL A 17 SHEET 6 AA1 6 ALA I 8 HIS I 18 1 N LEU I 16 O VAL K 17 SHEET 1 AA2 6 ASN G 21 ASN G 22 0 SHEET 2 AA2 6 ASN E 21 ASN E 22 1 N ASN E 21 O ASN G 22 SHEET 3 AA2 6 ASN C 21 ASN C 22 1 N ASN C 21 O ASN E 22 SHEET 4 AA2 6 ASN A 21 ASN A 22 1 N ASN A 21 O ASN C 22 SHEET 5 AA2 6 ASN K 21 ASN K 22 1 O ASN K 21 N ASN A 22 SHEET 6 AA2 6 ASN I 21 ASN I 22 1 N ASN I 21 O ASN K 22 SHEET 1 AA3 6 ILE G 26 THR G 30 0 SHEET 2 AA3 6 ILE E 26 THR E 30 1 N SER E 29 O THR G 30 SHEET 3 AA3 6 ILE C 26 THR C 30 1 N SER C 29 O THR E 30 SHEET 4 AA3 6 ILE A 26 THR A 30 1 N SER A 29 O THR C 30 SHEET 5 AA3 6 ILE K 26 THR K 30 1 O SER K 29 N THR A 30 SHEET 6 AA3 6 ILE I 26 THR I 30 1 N SER I 29 O THR K 30 SHEET 1 AA4 6 ASN G 35 THR G 36 0 SHEET 2 AA4 6 ASN E 35 THR E 36 1 N ASN E 35 O THR G 36 SHEET 3 AA4 6 ASN C 35 THR C 36 1 N ASN C 35 O THR E 36 SHEET 4 AA4 6 ASN A 35 THR A 36 1 N ASN A 35 O THR C 36 SHEET 5 AA4 6 ASN K 35 THR K 36 1 O ASN K 35 N THR A 36 SHEET 6 AA4 6 ASN I 35 THR I 36 1 N ASN I 35 O THR K 36 SHEET 1 AA5 6 ALA H 8 HIS H 18 0 SHEET 2 AA5 6 ALA F 8 HIS F 18 1 N LEU F 16 O VAL H 17 SHEET 3 AA5 6 ALA D 8 HIS D 18 1 N LEU D 16 O VAL F 17 SHEET 4 AA5 6 ALA B 8 HIS B 18 1 N LEU B 16 O VAL D 17 SHEET 5 AA5 6 ALA L 8 HIS L 18 1 O LEU L 16 N VAL B 17 SHEET 6 AA5 6 ALA J 8 HIS J 18 1 N LEU J 16 O VAL L 17 SHEET 1 AA6 6 ASN H 21 ASN H 22 0 SHEET 2 AA6 6 ASN F 21 ASN F 22 1 N ASN F 21 O ASN H 22 SHEET 3 AA6 6 ASN D 21 ASN D 22 1 N ASN D 21 O ASN F 22 SHEET 4 AA6 6 ASN B 21 ASN B 22 1 N ASN B 21 O ASN D 22 SHEET 5 AA6 6 ASN L 21 ASN L 22 1 O ASN L 21 N ASN B 22 SHEET 6 AA6 6 ASN J 21 ASN J 22 1 N ASN J 21 O ASN L 22 SHEET 1 AA7 6 ILE H 26 SER H 29 0 SHEET 2 AA7 6 ILE F 26 SER F 29 1 N SER F 29 O SER H 28 SHEET 3 AA7 6 ILE D 26 THR D 30 1 N SER D 29 O SER F 28 SHEET 4 AA7 6 ILE B 26 THR B 30 1 N SER B 29 O THR D 30 SHEET 5 AA7 6 ILE L 26 THR L 30 1 O SER L 29 N THR B 30 SHEET 6 AA7 6 ILE J 26 THR J 30 1 N SER J 29 O THR L 30 SHEET 1 AA8 6 ASN H 35 THR H 36 0 SHEET 2 AA8 6 ASN F 35 THR F 36 1 N ASN F 35 O THR H 36 SHEET 3 AA8 6 ASN D 35 THR D 36 1 N ASN D 35 O THR F 36 SHEET 4 AA8 6 ASN B 35 THR B 36 1 N ASN B 35 O THR D 36 SHEET 5 AA8 6 ASN L 35 THR L 36 1 O ASN L 35 N THR B 36 SHEET 6 AA8 6 ASN J 35 THR J 36 1 N ASN J 35 O THR L 36 SSBOND 1 CYS A 2 CYS A 7 1555 1555 2.03 SSBOND 2 CYS B 2 CYS B 7 1555 1555 2.03 SSBOND 3 CYS C 2 CYS C 7 1555 1555 2.03 SSBOND 4 CYS D 2 CYS D 7 1555 1555 2.03 SSBOND 5 CYS E 2 CYS E 7 1555 1555 2.03 SSBOND 6 CYS F 2 CYS F 7 1555 1555 2.03 SSBOND 7 CYS G 2 CYS G 7 1555 1555 2.03 SSBOND 8 CYS H 2 CYS H 7 1555 1555 2.03 SSBOND 9 CYS I 2 CYS I 7 1555 1555 2.03 SSBOND 10 CYS J 2 CYS J 7 1555 1555 2.03 SSBOND 11 CYS K 2 CYS K 7 1555 1555 2.03 SSBOND 12 CYS L 2 CYS L 7 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 265 TYR A 37 TER 530 TYR B 37 TER 795 TYR C 37 TER 1060 TYR D 37 TER 1325 TYR E 37 TER 1590 TYR F 37 TER 1855 TYR G 37 TER 2120 TYR H 37 TER 2385 TYR I 37 TER 2650 TYR J 37 TER 2915 TYR K 37 TER 3180 TYR L 37 CONECT 6 39 CONECT 39 6 CONECT 271 304 CONECT 304 271 CONECT 536 569 CONECT 569 536 CONECT 801 834 CONECT 834 801 CONECT 1066 1099 CONECT 1099 1066 CONECT 1331 1364 CONECT 1364 1331 CONECT 1596 1629 CONECT 1629 1596 CONECT 1861 1894 CONECT 1894 1861 CONECT 2126 2159 CONECT 2159 2126 CONECT 2391 2424 CONECT 2424 2391 CONECT 2656 2689 CONECT 2689 2656 CONECT 2921 2954 CONECT 2954 2921 MASTER 151 0 0 0 48 0 0 6 3168 12 24 36 END