9Q2V | pdb_00009q2v

Structure of peptide segment KLVFFA from amyloid-beta determined by liquid cell MicroED at room temperature

PDB DOI: https://doi.org/10.2210/pdb9Q2V/pdb

Classification: PROTEIN FIBRIL
Organism(s): Homo sapiens
Mutation(s): No

Deposited: 2025-08-15 Released: 2026-08-26
Deposition Author(s): Vlahakis, N.W., Rodriguez, J.A.
Funding Organization(s): Howard Hughes Medical Institute (HHMI), Department of Energy (DOE, United States), National Science Foundation (NSF, United States)

Experimental Data Snapshot

Method: ELECTRON CRYSTALLOGRAPHY
Resolution: 1.00 Å
R-Value Free:
0.318 (Depositor), 0.325 (DCC)
R-Value Work:
0.276 (Depositor), 0.285 (DCC)
R-Value Observed:
0.280 (Depositor)

Starting Model: experimental
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This is version 1.0 of the entry. See complete history.

Literature

Structures of solvated organic molecules enabled by liquid cell MicroED

Vlahakis, N.W., Konieczny, K., Flowers, C.W., Garcia-Garibay, M.A., Rodriguez, J.A.

To be published.

Macromolecule Content

Total Structure Weight: 0.78 kDa
Atom Count: 58
Modeled Residue Count: 6
Deposited Residue Count: 6
Unique protein chains: 1

Macromolecules

Find similar proteins by: Sequence | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
LYS-LEU-VAL-PHE-PHE-ALA	A	6	Homo sapiens	Mutation(s): 0
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
ACT Query on ACT Download:Ideal Coordinates CCD File SDF format, chain B [auth A] MOL2 format, chain B [auth A] mmCIF format, chain B [auth A]	B [auth A]	ACETATE ION C₂ H₃ O₂ QTBSBXVTEAMEQO-UHFFFAOYSA-M		Interactions Focus chain B [auth A] Interactions & Density Focus chain B [auth A]

Experimental Data & Validation

Experimental Data

Method: ELECTRON CRYSTALLOGRAPHY
Resolution: 1.00 Å
R-Value Free: 0.318 (Depositor), 0.325 (DCC)
R-Value Work: 0.276 (Depositor), 0.285 (DCC)
R-Value Observed: 0.280 (Depositor)

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 9.68	α = 90
b = 12.94	β = 90
c = 41.82	γ = 90

EM Software:

Task	Software Package	Version
RECONSTRUCTION	PHENIX

Structure Validation

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-08-26

Deposition Author(s):

Rodriguez, J.A.

Funding Organization	Location	Grant Number
Howard Hughes Medical Institute (HHMI)	United States	--
Department of Energy (DOE, United States)	United States	--
National Science Foundation (NSF, United States)	United States	--

Revision History (Full details and data files)

Version 1.0: 2026-08-26
Type: Initial release

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.