9HX4 image
Deposition Date 2025-01-06
Release Date 2025-11-05
Last Version Date 2025-11-05
Entry Detail
PDB ID:
9HX4
Keywords:
PROTEIN FIBRIL
Title:
Amyloid fibril of apolipoprotein A-IV
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
3.30 Å
Aggregation State:
HELICAL ARRAY
Reconstruction Method:
HELICAL
9HX4 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Apolipoprotein A-IV
Gene (Uniprot):APOA4
Chain IDs:A (auth: F), B (auth: E), C (auth: B), D (auth: A), E (auth: C), F (auth: D), G, H, I, J
Chain Length:396
Number of Molecules:10
Biological Source:Homo sapiens
UniProt ID:P06727 Pfam ID:PF01442
Ligand Molecules
NA
Primary Citation
Apolipoprotein A-IV fibrils: structural diagnosis of mixed cardiac amyloidosis.
Nat Commun 16 9276 9276 (2025)
PMID: 41115976 DOI: 10.1038/s41467-025-64902-0

Abstact

Cardiac amyloidosis (CA) occurs when misfolded proteins deposit as fibrils in the extracellular space of the heart. The fibrillogenic properties of apolipoprotein A-IV (ApoAIV) have been histologically observed and associated with CA pathogenesis. We report the structure of an ApoAIV amyloid from a patient's heart, which coexist amongst transthyretin (TTR) amyloids. These cases of undetected mixed CA highlight the importance of developing broad-spectrum anti-amyloid treatments to improve outcomes in patients.

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Primary Citation of related structures
9HX4