HEADER PROTEIN FIBRIL 07-DEC-25 21BU TITLE CRYO-EM STRUCTURE OF ORB2 AMYLOID FROM 15-DAY-OLD DROSOPHILA (POST- TITLE 2 3HA) COMPND MOL_ID: 1; COMPND 2 MOLECULE: TRANSLATIONAL REGULATOR ORB2; COMPND 3 CHAIN: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: DROSOPHILA MELANOGASTER; SOURCE 3 ORGANISM_COMMON: FRUIT FLY; SOURCE 4 ORGANISM_TAXID: 7227 KEYWDS ORB2, FUNCTIONAL AMYLOID, MEMORY, AGING, PROTEIN FIBRIL EXPDTA ELECTRON MICROSCOPY AUTHOR P.A.GUILLEN-POZA,R.HERVAS REVDAT 1 11-NOV-26 21BU 0 JRNL AUTH S.OU,P.A.GUILLEN-POZA,K.K.NG,L.XU,B.Y.CHENG,Y.YI,L.Y.HO, JRNL AUTH 2 A.FRANCO-FERNANDEZ,P.S.S.KHAKI,M.MUKHI,K.C.CHEUNG,R.SHARMA, JRNL AUTH 3 J.OROZ,Y.HIRANO,R.HERVAS JRNL TITL AGE-DEPENDENT STRUCTURAL EVOLUTION OF A FUNCTIONAL AMYLOID JRNL TITL 2 CONTRIBUTES TO MEMORY IMPAIRMENT IN DROSOPHILA. JRNL REF CELL 2026 JRNL REFN ISSN 1097-4172 JRNL PMID 42962658 JRNL DOI 10.1016/J.CELL.2026.10.009 REMARK 2 REMARK 2 RESOLUTION. 2.72 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) : 2.720 REMARK 3 NUMBER OF PARTICLES : 70583 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 21BU COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBJ ON 09-DEC-25. REMARK 100 THE DEPOSITION ID IS D_1300066315. 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 : TRANSLATIONAL REGULATOR ORB2 REMARK 245 AMYLOID 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 : 7.25 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) : 2000.00 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 : 130000 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: PENTADECAMERIC REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B, C, D, E, F, G, H, I, J, REMARK 350 AND CHAINS: K, L, M, N, O 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 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-67562 RELATED DB: EMDB REMARK 900 CRYO-EM STRUCTURE OF ORB2 AMYLOID FROM 15-DAY-OLD DROSOPHILA (TYPE REMARK 900 A) DBREF 21BU A 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU B 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU C 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU D 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU E 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU F 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU G 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU H 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU I 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU J 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU K 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU L 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU M 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU N 6 36 UNP Q9VSR3 ORB2_DROME 176 206 DBREF 21BU O 6 36 UNP Q9VSR3 ORB2_DROME 176 206 SEQRES 1 A 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 A 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 A 31 GLN GLN GLN LEU SER SEQRES 1 B 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 B 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 B 31 GLN GLN GLN LEU SER SEQRES 1 C 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 C 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 C 31 GLN GLN GLN LEU SER SEQRES 1 D 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 D 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 D 31 GLN GLN GLN LEU SER SEQRES 1 E 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 E 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 E 31 GLN GLN GLN LEU SER SEQRES 1 F 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 F 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 F 31 GLN GLN GLN LEU SER SEQRES 1 G 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 G 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 G 31 GLN GLN GLN LEU SER SEQRES 1 H 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 H 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 H 31 GLN GLN GLN LEU SER SEQRES 1 I 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 I 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 I 31 GLN GLN GLN LEU SER SEQRES 1 J 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 J 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 J 31 GLN GLN GLN LEU SER SEQRES 1 K 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 K 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 K 31 GLN GLN GLN LEU SER SEQRES 1 L 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 L 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 L 31 GLN GLN GLN LEU SER SEQRES 1 M 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 M 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 M 31 GLN GLN GLN LEU SER SEQRES 1 N 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 N 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 N 31 GLN GLN GLN LEU SER SEQRES 1 O 31 GLN LEU HIS GLN GLN GLN HIS GLN GLN GLN HIS GLN GLN SEQRES 2 O 31 HIS GLN GLN HIS GLN GLN GLN GLN GLN LEU HIS GLN HIS SEQRES 3 O 31 GLN GLN GLN LEU SER SHEET 1 AA1 5 LEU J 7 GLN J 10 0 SHEET 2 AA1 5 LEU D 7 GLN D 10 1 N GLN D 9 O GLN J 10 SHEET 3 AA1 5 LEU A 7 GLN A 10 1 N GLN A 9 O GLN D 10 SHEET 4 AA1 5 LEU G 7 GLN G 10 1 O GLN G 9 N GLN A 10 SHEET 5 AA1 5 LEU M 7 GLN M 10 1 O GLN M 9 N GLN G 10 SHEET 1 AA2 5 GLN J 13 GLN J 17 0 SHEET 2 AA2 5 GLN D 13 GLN D 17 1 N GLN D 15 O HIS J 16 SHEET 3 AA2 5 GLN A 13 GLN A 17 1 N GLN A 15 O HIS D 16 SHEET 4 AA2 5 GLN G 13 GLN G 17 1 O GLN G 15 N HIS A 16 SHEET 5 AA2 5 GLN M 13 GLN M 17 1 O GLN M 15 N HIS G 16 SHEET 1 AA3 5 GLN J 20 GLN J 21 0 SHEET 2 AA3 5 GLN D 20 GLN D 21 1 N GLN D 20 O GLN J 21 SHEET 3 AA3 5 GLN A 20 GLN A 21 1 N GLN A 20 O GLN D 21 SHEET 4 AA3 5 GLN G 20 GLN G 21 1 O GLN G 20 N GLN A 21 SHEET 5 AA3 5 GLN M 20 GLN M 21 1 O GLN M 20 N GLN G 21 SHEET 1 AA4 5 GLN J 27 GLN J 34 0 SHEET 2 AA4 5 GLN D 27 GLN D 34 1 N LEU D 28 O GLN J 27 SHEET 3 AA4 5 GLN A 27 GLN A 34 1 N LEU A 28 O GLN D 27 SHEET 4 AA4 5 GLN G 27 GLN G 34 1 O LEU G 28 N GLN A 27 SHEET 5 AA4 5 GLN M 27 GLN M 34 1 O LEU M 28 N GLN G 27 SHEET 1 AA5 5 LEU K 7 GLN K 10 0 SHEET 2 AA5 5 LEU E 7 GLN E 10 1 N GLN E 9 O GLN K 10 SHEET 3 AA5 5 LEU B 7 GLN B 10 1 N GLN B 9 O GLN E 10 SHEET 4 AA5 5 LEU H 7 GLN H 10 1 O GLN H 9 N GLN B 10 SHEET 5 AA5 5 LEU N 7 GLN N 10 1 O GLN N 9 N GLN H 10 SHEET 1 AA6 5 GLN K 13 GLN K 21 0 SHEET 2 AA6 5 GLN E 13 GLN E 21 1 N GLN E 15 O HIS K 16 SHEET 3 AA6 5 GLN B 13 GLN B 21 1 N GLN B 15 O HIS E 16 SHEET 4 AA6 5 GLN H 13 GLN H 21 1 O GLN H 15 N HIS B 16 SHEET 5 AA6 5 GLN N 13 GLN N 21 1 O GLN N 15 N HIS H 16 SHEET 1 AA7 5 GLN K 27 GLN K 34 0 SHEET 2 AA7 5 GLN E 27 GLN E 34 1 N LEU E 28 O GLN K 27 SHEET 3 AA7 5 GLN B 27 GLN B 34 1 N LEU B 28 O GLN E 27 SHEET 4 AA7 5 GLN H 27 GLN H 34 1 O LEU H 28 N GLN B 27 SHEET 5 AA7 5 GLN N 27 GLN N 34 1 O LEU N 28 N GLN H 27 SHEET 1 AA8 5 LEU L 7 GLN L 18 0 SHEET 2 AA8 5 LEU F 7 GLN F 18 1 N GLN F 17 O HIS L 16 SHEET 3 AA8 5 LEU C 7 GLN C 18 1 N GLN C 17 O HIS F 16 SHEET 4 AA8 5 LEU I 7 GLN I 18 1 O GLN I 17 N HIS C 16 SHEET 5 AA8 5 LEU O 7 GLN O 18 1 O GLN O 17 N HIS I 16 SHEET 1 AA9 5 GLN L 27 GLN L 34 0 SHEET 2 AA9 5 GLN F 27 GLN F 34 1 N LEU F 28 O GLN L 27 SHEET 3 AA9 5 GLN C 27 GLN C 34 1 N LEU C 28 O GLN F 27 SHEET 4 AA9 5 GLN I 27 GLN I 34 1 O LEU I 28 N GLN C 27 SHEET 5 AA9 5 GLN O 27 GLN O 34 1 O LEU O 28 N GLN I 27 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 MASTER 100 0 0 0 45 0 0 6 4200 15 0 45 END