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- W4248467753 abstract "Background : Acetylation alters several protein properties including molecular weight, stability, enzymatic activity, protein-protein interactions, and other biological functions. Our previous findings demonstrating that diacetyl/peroxynitrite can acetylate L-lysine, L-histidine, and albumin in vitro led us to investigate whether diacetyl-treated rats suffer protein acetylation as well. Methods : Wistar rats were administered diacetyl daily for 4 weeks, after which they were sacrificed, and their lung proteins were extracted to be analysed by Nano-LC-MS/MS (Q-TOF). A C18 reversed-phase column and gradient elution with formic acid/acetonitrile solutions from 2 to 50% over 150 min were used to separate the proteins. Protein detection was performed using a microTOF-Q II (QTOF) equipped with captive source and an electrospray-ionization source. The data from mass spectrometry were processed using a Compass 1.7 and analyzed using Protein Scape, software that uses Mascot algorithms to perform protein searches. Results: A set of 3162 acetylated peptides derived from 351 acetylated proteins in the diacetyl-treated group was identified. Among them, 23 targeted proteins were significantly more acetylated in the diacetyl-treated group than in the PBS control. Protein acetylation of the group treated with 540 mg/kg/day of diacetyl was corroborated by Western blotting analysis. Conclusions: These data support our hypothesis that diacetyl exposure in animals may lead to the generation of acetyl radicals, compounds that attach to proteins, affecting their functions and triggering adverse health problems." @default.
- W4248467753 created "2022-05-12" @default.
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- W4248467753 date "2018-03-03" @default.
- W4248467753 modified "2023-10-03" @default.
- W4248467753 title "Increased chemical acetylation of peptides and proteins in rats after daily ingestion of diacetyl analyzed by Nano-Lc-MS/MS" @default.
- W4248467753 doi "https://doi.org/10.7287/peerj.preprints.26613v1" @default.
- W4248467753 hasPublicationYear "2018" @default.
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