| Literature DB >> 27103115 |
Ying Zhang1,2, Weidong Cui1, Aaron T Wecksler3, Hao Zhang1, Patricia Molina3, Galahad Deperalta3, Michael L Gross4.
Abstract
Native mass spectrometry (MS) and top-down electron-capture dissociation (ECD) combine as a powerful approach for characterizing large proteins and protein assemblies. Here, we report their use to study an antibody Fab (Fab-1)-VEGF complex in its near-native state. Native ESI with analysis by FTICR mass spectrometry confirms that VEGF is a dimer in solution and that its complex with Fab-1 has a binding stoichiometry of 2:2. Applying combinations of collisionally activated dissociation (CAD), ECD, and infrared multiphoton dissociation (IRMPD) allows identification of flexible regions of the complex, potentially serving as a guide for crystallization and X-ray diffraction analysis. Graphical Abstract ᅟ.Entities:
Keywords: Electron capture dissociation (ECD); Fab-Antigen Complex; Fourier transform ICR mass spectrometry; High-order structure (HOS); Native MS; VEGF; X-ray crystallography
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Year: 2016 PMID: 27103115 PMCID: PMC4899112 DOI: 10.1007/s13361-016-1398-9
Source DB: PubMed Journal: J Am Soc Mass Spectrom ISSN: 1044-0305 Impact factor: 3.109