Abstract

Neurodegenerative diseases are prevalent, chronic diseases emanating from the dysfunction or death of neurons. The disrupted mitochondrial dynamics observed in a large number of neurodegenerative diseases suggests a common etiology with the possibility of therapies targeting multiple diseases. This review highlights the contributions of structural studies of disease-related proteins to the understanding of neurodegenerative disease pathogenesis and especially the cellular events leading to disruptions in mitochondrial dynamics and function. The examples used are parkin and sacsin, two proteins linked respectively to autosomal-recessive early-onset PD and autosomal-recessive spastic ataxia of Charlevoix-Saguenay. Structural studies of parkin and sacsin explain the pathogenicity of a large number of disease-associated mutations and reveal insights into their cellular functions related to mitochondrial dynamics.

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