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Enabling Global Analysis of Protein Citrullination via Biotin Thiol Tag-Assisted Mass Spectrometry.

ABSTRACT: Citrullination is a key post-translational modification (PTM) that affects protein structures and functions. Although it has been linked to various biological processes and disease pathogenesis, the underlying mechanism remains poorly understood due to a lack of effective tools to enrich, detect, and localize this PTM. Herein, we report the design and development of a biotin thiol tag that enables derivatization, enrichment, and confident identification of citrullination via mass spectrometry. We perform global mapping of the citrullination proteome of mouse tissues. In total, we identify 691 citrullination sites from 432 proteins which represents the largest data set to date. We discover novel distribution and functions of this PTM. This study depicts a landscape of protein citrullination and lays the foundation for further deciphering their physiological and pathological roles.

SUBMITTER: Shi Y 

PROVIDER: S-EPMC10276619 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature

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Enabling Global Analysis of Protein Citrullination via Biotin Thiol Tag-Assisted Mass Spectrometry.

Shi Yatao Y   Li Zihui Z   Wang Bin B   Shi Xudong X   Ye Hui H   Delafield Daniel G DG   Lv Langlang L   Ye Zhengqing Z   Chen Zhengwei Z   Ma Fengfei F   Li Lingjun L  

Analytical chemistry 20221213 51

Citrullination is a key post-translational modification (PTM) that affects protein structures and functions. Although it has been linked to various biological processes and disease pathogenesis, the underlying mechanism remains poorly understood due to a lack of effective tools to enrich, detect, and localize this PTM. Herein, we report the design and development of a biotin thiol tag that enables derivatization, enrichment, and confident identification of citrullination via mass spectrometry. W  ...[more]

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