A photocleavable surfactant for top-down proteomics

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Brown K. A. , Chen B., Guardado-Alvarez T. M. , Lin Z., Hwang L., Ayaz-Guner Ş. , ...More

NATURE METHODS, vol.16, no.5, pp.417-423, 2019 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 16 Issue: 5
  • Publication Date: 2019
  • Doi Number: 10.1038/s41592-019-0391-1
  • Title of Journal : NATURE METHODS
  • Page Numbers: pp.417-423


We report the identification of a photocleavable anionic surfactant, 4-hexylphenylazosulfonate (Azo), which can be rapidly degraded by ultraviolet irradiation, for top-down proteomics. Azo can effectively solubilize proteins with performance comparable to that of sodium dodecyl sulfate (SDS) and is compatible with mass spectrometry. Azo-aided top-down proteomics enables the solubilization of membrane proteins for comprehensive characterization of post-translational modifications. Moreover, Azo is simple to synthesize and can be used as a general SDS replacement in SDS-polyacrylamide gel electrophoresis.