Methionine oxidation disrupts TDP-43 assembly through two mechanisms
Original source
Methionine oxidation alters both helical assembly and disordered contacts in human TDP-43 C-terminal domain phase separation. (opens in a new tab)Compass summarised this from the study's abstract.
Study details
- Studied in
- Human
Related topics
A study found that oxidation of methionine residues in the C-terminal domain of TDP-43 disrupts phase separation in two different ways. Oxidation in one region damaged helical interactions, while oxidation in another disrupted longer-range contacts. The researchers used nuclear magnetic resonance spectroscopy and molecular dynamics simulations.
Why this matters
The findings clarify how chemical changes to TDP-43 could affect its assembly, a process linked to ALS pathology. This is a molecular study and does not change treatment or establish that preventing methionine oxidation benefits people with ALS.
Limitations and context
The work examined TDP-43’s C-terminal domain using laboratory techniques and simulations, rather than people, patients’ cells, or a treatment study. It therefore shows possible molecular mechanisms, but whether these changes occur in ALS and how they affect disease remains to be shown.