A Conformation-Specific Approach to Native Top-down Mass Spectrometry

Overview

Journal J Am Soc Mass Spectrom

Specialty Chemistry

Date 2024 Oct 25

PMID 39453623

Authors

Hannah M Britt

Aisha Ben-Younis

Nathanael Page

Konstantinos Thalassinos

Affiliations

Soon will be listed here.

Abstract

Native top-down mass spectrometry is a powerful approach for characterizing proteoforms and has recently been applied to provide similarly powerful insights into protein conformation. Current approaches, however, are limited such that structural insights can only be obtained for the entire conformational landscape in bulk or without any direct conformational measurement. We report a new ion-mobility-enabled method for performing native top-down MS in a conformation-specific manner. Our approach identified conformation-linked differences in backbone dissociation for the model protein calmodulin, which simultaneously informs upon proteoform variations and provides structural insights. We also illustrate that our method can be applied to protein-ligand complexes, either to identify components or to probe ligand-induced structural changes.

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