Journal
BIOCHEMISTRY
Volume 49, Issue 14, Pages 2981-2983Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bi902203m
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- NHMRC
- ARC
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A common feature of many amyloid diseases is the appearance of oxidized, aggregated proteins. Methionine is one of the most readily oxidized amino acids, and its oxidative state is regulated in vivo by the methionine sulfoxide reductases (Msr). Here, we have explored the basis by which methionine oxidation is linked to amyloid disease by comparing the reduction of oxidized amyloid fibrils and monomer. We show that oxidized amyloid fibrils are not as effectively reduced by the Msr enzymes as the monomer. This work suggests a mechanism by which oxidized proteins and aggregates can accumulate as a part of degenerative disease.
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