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Affinity and chemical enrichment strategies for mapping low-abundance protein modifications and protein-interaction networks. | LitMetric

AI Article Synopsis

Article Abstract

Protein post-translational modifications and protein interactions are the central research areas in mass-spectrometry-based proteomics. Protein post-translational modifications affect protein structures, stabilities, activities, and all cellular processes are achieved by interactions among proteins and protein complexes. With the continuing advancements of mass spectrometry instrumentations of better sensitivity, speed, and performance, selective enrichment of modifications/interactions of interest from complex cellular matrices during the sample preparation has become the overwhelming bottleneck in the proteomics workflow. Therefore, many strategies have been developed to address this issue by targeting specific modifications/interactions based on their physical properties or chemical reactivities, but only a few have been successfully applied for systematic proteome-wide study. In this review, we summarized the highlights of recent developments in the affinity enrichment methods focusing mainly on low stoichiometric protein lipidations. Besides, to identify potential glyoxal modified arginines, a small part was added for profiling reactive arginine sites using an enrichment reagent. A detailed section was provided for the enrichment of protein interactions by affinity purification and chemical cross-linking, to shed light on the potentials of different enrichment strategies, along with the unique challenges in investigating individual protein post-translational modification or protein interaction network.

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http://dx.doi.org/10.1002/jssc.202000930DOI Listing

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