ジャーナル: medRxiv / 年: 2025 タイトル: A novel alpha-synuclein K58N missense variant in a patient with Parkinson's disease. 著者: Mohammed Al-Azzani / Sandrina Weber / Nagendran Ramalingam / Maria Ramón / Liana Shvachiy / Gonçalo Mestre / Michael Zech / Kevin Sicking / Alain Ibáñez de Opakua / Vidyashree Jayanthi / ...著者: Mohammed Al-Azzani / Sandrina Weber / Nagendran Ramalingam / Maria Ramón / Liana Shvachiy / Gonçalo Mestre / Michael Zech / Kevin Sicking / Alain Ibáñez de Opakua / Vidyashree Jayanthi / Leslie Amaral / Aishwarya Agarwal / Aswathy Chandran / Susana R Chaves / Juliane Winkelmann / Claudia Trenkwalder / Maike Schwager / Silke Pauli / Ulf Dettmer / Claudio O Fernández / Janin Lautenschläger / Markus Zweckstetter / Ruben Fernandez Busnadiego / Brit Mollenhauer / Tiago Fleming Outeiro / 要旨: Mutations and multiplications in the SNCA , encoding alpha-synuclein (aSyn), are associated with familial forms of Parkinson's disease (PD). We report the identification of a novel missense mutation ...Mutations and multiplications in the SNCA , encoding alpha-synuclein (aSyn), are associated with familial forms of Parkinson's disease (PD). We report the identification of a novel missense mutation (NM_000345.4, cDNA 174G>C; protein K58N) in a PD patient using whole exome sequencing, and describe comprehensive molecular and cellular analysss of the effects of this novel mutation. The patient exhibited typical sporadic PD with early onset and a benign disease course. Biophysical studies revealed that the K58N substitution causes local structural effects, disrupts binding to membranes, and enhances aSyn in vitro aggregation. K58N aSyn produces fewer inclusions per cell, and fails to undergo condensate formation. The mutation increases the cytoplasmic distribution of the protein, and has minimal effect on the dynamic reversibility of serine-129 phosphorylation. In total, the identification of this novel mutation advances our understanding of aSyn biology and pathobiology.
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