HEADER PROTEIN FIBRIL 19-AUG-26 44ZG TITLE SUNFLOWER PROTEIN AMYLOID FIBRILS - PM2 COMPND MOL_ID: 1; COMPND 2 MOLECULE: 11-S SEED STORAGE PROTEIN, PLANT; COMPND 3 CHAIN: A, B, C, D, E; COMPND 4 SYNONYM: PUTATIVE 11-S SEED STORAGE PROTEIN,PLANT,RMLC-LIKE CUPIN COMPND 5 DOMAIN,RMLC-LIKE JELLY ROLL FOLD PROTEIN; COMPND 6 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HELIANTHUS ANNUUS; SOURCE 3 ORGANISM_COMMON: COMMON SUNFLOWER; SOURCE 4 ORGANISM_TAXID: 4232; SOURCE 5 GENE: HANNXRQ_CHR10G0288971, HANNXRQ_CHR10G0301281, SOURCE 6 HANXRQR2_CHR10G0447881, HANXRQR2_CHR10G0447931; SOURCE 7 EXPRESSION_SYSTEM: HELIANTHUS ANNUUS; SOURCE 8 EXPRESSION_SYSTEM_TAXID: 4232 KEYWDS PROTEIN FIBRILS, PROTEIN FIBRIL EXPDTA ELECTRON MICROSCOPY AUTHOR S.LI,Q.CAO,Y.CAO REVDAT 1 07-OCT-26 44ZG 0 JRNL AUTH S.LI,K.OUYANG,S.LI,Y.FANG,Q.CAO,Y.CAO JRNL TITL CRYO-EM STRUCTURES OF SUNFLOWER AMYLOID FIBRILS REVEAL TWO JRNL TITL 2 DISTINCT DISULFIDE‐LINKED ASSEMBLY MODES. JRNL REF SMALL 75987 2026 JRNL REFN ESSN 1613-6829 JRNL PMID 42801496 JRNL DOI 10.1002/SMLL.75987 REMARK 2 REMARK 2 RESOLUTION. 3.20 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 SOFTWARE PACKAGES : RELION, RELION 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) : 3.200 REMARK 3 NUMBER OF PARTICLES : 46925 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 44ZG COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBC ON 24-AUG-26. REMARK 100 THE DEPOSITION ID IS D_1300078305. 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 : SUNFLOWER PROTEIN AMYLOID REMARK 245 FIBRILS PM2 REMARK 245 SAMPLE CONCENTRATION (MG ML-1) : 20.00 REMARK 245 SAMPLE SUPPORT DETAILS : NULL REMARK 245 SAMPLE VITRIFICATION DETAILS : NULL REMARK 245 SAMPLE BUFFER : NULL REMARK 245 PH : 2.00 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 : FEI FALCON IV (4K X 4K) REMARK 245 MINIMUM DEFOCUS (NM) : 1500.00 REMARK 245 MAXIMUM DEFOCUS (NM) : 2500.00 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: PENTAMERIC REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C, D, E 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 50 15.22 -147.70 REMARK 500 CYS A 65 127.39 -32.81 REMARK 500 ALA A 66 -151.12 -145.59 REMARK 500 ALA B 50 15.28 -147.73 REMARK 500 CYS B 65 127.35 -32.74 REMARK 500 ALA B 66 -151.11 -145.66 REMARK 500 ALA C 50 15.25 -147.73 REMARK 500 CYS C 65 127.27 -32.69 REMARK 500 ALA C 66 -151.12 -145.54 REMARK 500 ALA D 50 15.28 -147.74 REMARK 500 CYS D 65 127.39 -32.75 REMARK 500 ALA D 66 -151.19 -145.65 REMARK 500 ALA E 50 15.26 -147.69 REMARK 500 CYS E 65 127.38 -32.76 REMARK 500 ALA E 66 -151.12 -145.62 REMARK 500 REMARK 500 REMARK: NULL REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-83109 RELATED DB: EMDB REMARK 900 SUNFLOWER PROTEIN AMYLOID FIBRILS - PM2 DBREF1 44ZG A 30 68 UNP A0A251TKL9_HELAN DBREF2 44ZG A A0A251TKL9 30 68 DBREF1 44ZG B 30 68 UNP A0A251TKL9_HELAN DBREF2 44ZG B A0A251TKL9 30 68 DBREF1 44ZG C 30 68 UNP A0A251TKL9_HELAN DBREF2 44ZG C A0A251TKL9 30 68 DBREF1 44ZG D 30 68 UNP A0A251TKL9_HELAN DBREF2 44ZG D A0A251TKL9 30 68 DBREF1 44ZG E 30 68 UNP A0A251TKL9_HELAN DBREF2 44ZG E A0A251TKL9 30 68 SEQRES 1 A 39 ASN GLN CYS GLN LEU GLN ASN ILE GLU ALA LEU GLU PRO SEQRES 2 A 39 ILE GLU VAL ILE GLN ALA GLU ALA GLY VAL THR GLU ILE SEQRES 3 A 39 TRP ASP ALA TYR ASP GLN GLN PHE GLN CYS ALA GLY VAL SEQRES 1 B 39 ASN GLN CYS GLN LEU GLN ASN ILE GLU ALA LEU GLU PRO SEQRES 2 B 39 ILE GLU VAL ILE GLN ALA GLU ALA GLY VAL THR GLU ILE SEQRES 3 B 39 TRP ASP ALA TYR ASP GLN GLN PHE GLN CYS ALA GLY VAL SEQRES 1 C 39 ASN GLN CYS GLN LEU GLN ASN ILE GLU ALA LEU GLU PRO SEQRES 2 C 39 ILE GLU VAL ILE GLN ALA GLU ALA GLY VAL THR GLU ILE SEQRES 3 C 39 TRP ASP ALA TYR ASP GLN GLN PHE GLN CYS ALA GLY VAL SEQRES 1 D 39 ASN GLN CYS GLN LEU GLN ASN ILE GLU ALA LEU GLU PRO SEQRES 2 D 39 ILE GLU VAL ILE GLN ALA GLU ALA GLY VAL THR GLU ILE SEQRES 3 D 39 TRP ASP ALA TYR ASP GLN GLN PHE GLN CYS ALA GLY VAL SEQRES 1 E 39 ASN GLN CYS GLN LEU GLN ASN ILE GLU ALA LEU GLU PRO SEQRES 2 E 39 ILE GLU VAL ILE GLN ALA GLU ALA GLY VAL THR GLU ILE SEQRES 3 E 39 TRP ASP ALA TYR ASP GLN GLN PHE GLN CYS ALA GLY VAL SHEET 1 AA1 5 GLN A 35 LEU A 40 0 SHEET 2 AA1 5 GLN B 35 LEU B 40 1 O ILE B 37 N ASN A 36 SHEET 3 AA1 5 GLN C 35 LEU C 40 1 O ILE C 37 N ASN B 36 SHEET 4 AA1 5 GLN D 35 LEU D 40 1 O ILE D 37 N ASN C 36 SHEET 5 AA1 5 GLN E 35 LEU E 40 1 O ILE E 37 N ASN D 36 SHEET 1 AA2 5 ILE A 43 ALA A 48 0 SHEET 2 AA2 5 ILE B 43 ALA B 48 1 O GLN B 47 N ILE A 46 SHEET 3 AA2 5 ILE C 43 ALA C 48 1 O GLN C 47 N ILE B 46 SHEET 4 AA2 5 ILE D 43 ALA D 48 1 O GLN D 47 N ILE C 46 SHEET 5 AA2 5 ILE E 43 ALA E 48 1 O GLN E 47 N ILE D 46 SHEET 1 AA3 5 VAL A 52 TRP A 56 0 SHEET 2 AA3 5 VAL B 52 TRP B 56 1 O ILE B 55 N GLU A 54 SHEET 3 AA3 5 VAL C 52 TRP C 56 1 O ILE C 55 N GLU B 54 SHEET 4 AA3 5 VAL D 52 TRP D 56 1 O ILE D 55 N GLU C 54 SHEET 5 AA3 5 VAL E 52 TRP E 56 1 O ILE E 55 N GLU D 54 SHEET 1 AA4 5 GLN A 62 PHE A 63 0 SHEET 2 AA4 5 GLN B 62 PHE B 63 1 O PHE B 63 N GLN A 62 SHEET 3 AA4 5 GLN C 62 PHE C 63 1 O PHE C 63 N GLN B 62 SHEET 4 AA4 5 GLN D 62 PHE D 63 1 O PHE D 63 N GLN C 62 SHEET 5 AA4 5 GLN E 62 PHE E 63 1 O PHE E 63 N GLN D 62 SSBOND 1 CYS A 32 CYS A 65 1555 1555 2.03 SSBOND 2 CYS B 32 CYS B 65 1555 1555 2.02 SSBOND 3 CYS C 32 CYS C 65 1555 1555 2.03 SSBOND 4 CYS D 32 CYS D 65 1555 1555 2.02 SSBOND 5 CYS E 32 CYS E 65 1555 1555 2.02 CRYST1 1.000 1.000 1.000 90.00 90.00 90.00 P 1 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 23 289 CONECT 289 23 CONECT 329 595 CONECT 595 329 CONECT 635 901 CONECT 901 635 CONECT 941 1207 CONECT 1207 941 CONECT 1247 1513 CONECT 1513 1247 MASTER 130 0 0 0 20 0 0 6 1525 5 10 15 END