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Enhanced Sample Multiplexing-Based Targeted Proteomics with Intelligent Data Acquisition. | LitMetric

Enhanced Sample Multiplexing-Based Targeted Proteomics with Intelligent Data Acquisition.

J Am Soc Mass Spectrom

Department of cell biology, Harvard Medical School, Boston, Massachusetts 02115, United States.

Published: October 2024

AI Article Synopsis

Article Abstract

Targeted proteomics has been playing an increasingly important role in hypothesis-driven protein research and clinical biomarker discovery. We previously created a workflow, Tomahto, to enable real-time targeted pathway proteomics assays using two-dimensional multiplexing technology. Coupled with the TMT 11-plex reagent, hundreds of proteins of interest from up to 11 samples can be targeted and accurately quantified in a single-shot experiment with remarkable sensitivity. However, room remains to further improve the sensitivity, accuracy, and throughput, especially for targeted studies demanding a high peptide-level success rate. Here, bearing in mind the goal to improve peptide-level targeting, we introduce several new functionalities in Tomahto, featuring the integration of gas-phase fractionation using the FAIMS device, an accompanying software program (TomahtoPrimer) to customize fragmentation for each peptide target, and support for higher multiplexing capacity with the latest TMTpro reagent. We demonstrate that adding these features to the Tomahto platform significantly improves overall success rate from 89% to 98% in a single 60 min targeted assay of 290 peptides across human cell lines, while boosting quantitative accuracy via reducing TMT reporter ion interference.

Download full-text PDF

Source
http://dx.doi.org/10.1021/jasms.4c00234DOI Listing

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