ArticleProtein science : a publication of the Protein Society2026
Sequence determinants of the hypomobility of intrinsically disordered proteins in SDS-PAGE.
Article in Protein science : a publication of the Protein Society, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Sequence determinants of the hypomobility of intrinsically disordered proteins in SDS-PAGE.Protein science : a publication of the Protein Society · 2026Article
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3 authors.
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Abstract
Proteins with intrinsically disordered regions (IDRs) migrate at a higher apparent molecular weight in sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis, complicating their analysis and identification. Here, we investigate the sequence determinants of the hypomobility of IDRs using a series of synthetic low-complexity domains. We find that negative charge increases the apparent molecular weight, but neutral polar tracts also have abnormally slow migration. Positive charge and hydrophobic residues decrease the apparent molecular weight, although lysine residues show a biphasic effect with decreased migration at high fractional contents. Combinations of residues show that different sequence contributions to the apparent molecular weight are not additive. The results can be rationalized by the protein-decorated micelle model by considering both SDS binding and the compaction of protein SDS-complexes.
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