Protein mislocalization is a key initial step in neurodegeneration, regardless of etiology, and has been linked to changes in the dynamic addition of saturated fatty acids to proteins, a process known as S-acylation. With the advent of new techniques to study S-acylation and the recent discovery of new enzymes that facilitate protein deacylation, novel small molecules are emerging as potential new therapeutic treatments. Huntington disease (HD) is a devastating, fatal neurodegenerative disease characterized by motor, cognitive, and psychiatric deficits caused by a CAG repeat expansion in the HTT gene. The protein that is mutated in HD, huntingtin, is less S-acylated which is associated with mutant HTT aggregation and cytotoxicity. Recent exciting findings indicate that restoring S-acylation in HD models using small molecule inhibitors of the deacylation enzymes is protective. Herein, we set out to describe the known roles of S-acylation in HD and how it can be targeted for therapeutic design.
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Cover Image
Cover Image
A bright-field image of aged condensates and fibrillar aggregates of C-terminal domain of transactive response DNA-binding protein 43 is shown. In the center is a schematic representation of the molecular vibrations of the amide-I band, which directly reports on protein secondary structural features that can be measured by Raman spectroscopy. Representative Raman spectra from aged protein droplets (magenta) and aggregates (yellow) clearly show structural differences, exemplifying the utility and versatility of Raman spectroscopy for studies of protein aggregation. For further information, see the review in this issue by Ramos and Lee, pages 1121–1130. Image created by Sashary Ramos.
Let's get fat: emergence of S-acylation as a therapeutic target in Huntington disease Available to Purchase
Dale D.O. Martin, Shaun S. Sanders; Let's get fat: emergence of S-acylation as a therapeutic target in Huntington disease. Biochem Soc Trans 26 June 2024; 52 (3): 1385–1392. doi: https://doi.org/10.1042/BST20231290
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