Cryo-EM Unveils Mystery Density in Synuclein Fibrils

PLOS

Previous cryo-EM structures of synucleinopathy patient-derived α-synuclein fibrils revealed a 'mystery density' at the core of the protofilaments. This study identifies polyphosphate, a universally conserved and ancient biomolecule, to fit this density, binding to the lysine-rich pocket and contributing to fiber stabilization

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