Non-canonical amino acid incorporation enables minimally disruptive labeling of stress granule and TDP-43 proteinopathy.
basic_science · Level V
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- Record sourced from PubMed, PMID 42397263.
- Also identified by DOI 10.7554/eLife.109452.
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Abstract
We report a minimally disruptive labeling strategy for stress granule protein, G3BP Stress Granule Assembly Factor 1 (G3BP1), and ALS-linked protein, TAR DNA-binding protein 43 (TDP-43), using the fluorescent non-canonical amino acid Anap. By integrating the genetic code expansion (GCE) with rational site selection, we achieved precise incorporation of Anap that preserves protein structure and function. In live cells and neurons, Anap labeling faithfully recapitulated localization, stress-induced dynamics, and recovery behavior, outperforming conventional fluorescent tags, and enabling physiologically relevant visualization of protein pathobiology.
Medical subject headings
- DNA-Binding Proteins
- Staining and Labeling
- Stress Granules
- Amino Acids
- DNA Helicases
- Poly-ADP-Ribose Binding Proteins
- RNA Recognition Motif Proteins
- RNA Helicases