Tau proteins with cysteine groups bearing thiol groups (S) undergo chemical changes under oxidative stress to form disulfide bonds, making a toxic mutant of the tau protein that can aggregate. These go on to cause neural degeneration. Antioxidants can help reduce these back to thiols; these normal tau proteins can then be naturally cleared away by the cell. Credit: Tokyo Metropolitan University
Researchers from Tokyo Metropolitan University have discovered that a specific chemical feature of a key protein known as tau may cause it to accumulate in the brain and trigger illnesses like Alzheimer’s. They found that disulfide bonds on certain amino acids act to stabilize tau and cause it to accumulate, an effect that got worse with increased oxidative stress. The identification of chemical…
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