Which brain disease you get depends on a coin flip: whether a specific protein in your head folds into a 'twist' or a 'clump.'
April 13, 2026
Original Paper
The amyloid packing difference: a pairwise comparison metric for amyloid structures
bioRxiv · 10.64898/2026.02.18.706523
The Takeaway
Scientists discovered that the exact same protein can cause different diseases depending on its shape. This means the 3D geometry of protein clumps is the real key to diagnosing and treating neurodegenerative conditions.
From the abstract
Several proteins from the human proteome have been observed to adopt multiple distinct amyloid filaments, and specific protofilament folds are associated with different diseases. Thereby, it has become necessary to compare pairs of amyloid structures of a given protein. This paper describes the amyloid packing difference (APD), which quantifies the difference between such a pair as the percentage of residues that are involved in unique cross-{beta} packing interactions or that have different sid