Triflic Acid Treatment Enables LC-MS/MS Analysis of Insoluble Bacterial Biomass.

ABSTRACT: The lysis and extraction of soluble bacterial proteins from cells is a common practice for proteomics analyses, but insoluble bacterial biomasses are often left behind. Here, we show that with triflic acid treatment, the insoluble bacterial biomass of Gram^- and Gram⁺ bacteria can be rendered soluble. We use LC-MS/MS shotgun proteomics to show that bacterial proteins in the soluble and insoluble postlysis fractions differ significantly. Additionally, in the case of Gram^- Pseudomonas aeruginosa, triflic acid treatment enables the enrichment of cell-envelope-associated proteins. Finally, we apply triflic acid to a human microbiome sample to show that this treatment is robust and enables the identification of a new, complementary subset of proteins from a compl

SUBMITTER: Wang AY 

PROVIDER: S-EPMC7108958 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature