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- W2289014938 abstract "The monomerization of Cu, Zn superoxide dismutase (SOD1) is an early step along pathways of misfolding linked to amyotrophic lateral sclerosis (ALS). Monomerization requires the reversal of two post-translational modifications that are thermodynamically favorable: (i) dissociation of active-site metal ions and (ii) reduction of intramolecular disulfide bonds. This study found, using amide hydrogen/deuterium (H/D) exchange, capillary electrophoresis, and lysine-acetyl protein charge ladders, that ALS-linked A4V SOD1 rapidly monomerizes and partially unfolds in an external electric field (of physiological strength), without loss of metal ions, exposure to disulfide-reducing agents, or Joule heating. Voltage-induced monomerization was not observed for metal-free A4V SOD1, metal-free WT SOD1, or metal-loaded WT SOD1. Computational modeling suggested a mechanism for this counterintuitive effect: subunit macrodipoles of dimeric SOD1 are antiparallel and amplified 2-fold by metal coordination, which increases torque at the dimer interface as subunits rotate to align with the electric field." @default.
- W2289014938 created "2016-06-24" @default.
- W2289014938 creator A5027197117 @default.
- W2289014938 creator A5057112143 @default.
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- W2289014938 creator A5072407560 @default.
- W2289014938 date "2015-08-05" @default.
- W2289014938 modified "2023-09-24" @default.
- W2289014938 title "Voltage-Induced Misfolding of Zinc-Replete ALS Mutant Superoxide Dismutase-1" @default.
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- W2289014938 doi "https://doi.org/10.1021/acschemneuro.5b00146" @default.
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