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Open AccessJournal ArticleDOI

Confirmation of intersubunit connectivity and topology of designed protein complexes by native MS.

TLDR
This work designs protein–protein interfaces between dimers and trimers to generate dodecameric protein assemblies with dihedral point group symmetry and shows that information about stoichiometry, intersubunit connectivity, and complex topology is rapidly gained by this SID-IM-MS methodology.
Abstract
Computational protein design provides the tools to expand the diversity of protein complexes beyond those found in nature. Understanding the rules that drive proteins to interact with each other enables the design of protein–protein interactions to generate specific protein assemblies. In this work, we designed protein–protein interfaces between dimers and trimers to generate dodecameric protein assemblies with dihedral point group symmetry. We subsequently analyzed the designed protein complexes by native MS. We show that the use of ion mobility MS in combination with surface-induced dissociation (SID) allows for the rapid determination of the stoichiometry and topology of designed complexes. The information collected along with the speed of data acquisition and processing make SID ion mobility MS well-suited to determine key structural features of designed protein complexes, thereby circumventing the requirement for more time- and sample-consuming structural biology approaches.

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Citations
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Journal ArticleDOI

Programmable design of orthogonal protein heterodimers

TL;DR: The ability to design orthogonal protein heterodimers should enable sophisticated protein-based control logic for synthetic biology, and illustrates that nature has not fully explored the possibilities for programmable biomolecular interaction modalities.
Journal ArticleDOI

High-Resolution Native Mass Spectrometry.

TL;DR: A review of recent developments in high-resolution native mass spectrometer applications can be found in this article, which describes applications in the structural analysis of protein assemblies, proteoform profiling of biopharmaceuticals and plasma proteins.
Journal ArticleDOI

Controlling protein assembly on inorganic crystals through designed protein interfaces.

TL;DR: This work designs proteins displaying arrays of up to 54 carboxylate residues geometrically matched to the potassium ion (K+) sublattice on muscovite mica, demonstrating that protein–inorganic lattice interactions can be systematically programmed and set the stage for designing protein-inorganic hybrid materials.
Journal ArticleDOI

Surface-Induced Dissociation: An Effective Method for Characterization of Protein Quaternary Structure.

TL;DR: The major application focused on in this review is the structural characterization of native protein complexes, complexes kinetically trapped that retain native-like solution structures upon transfer to the gas-phase and throughout the relatively short timeframe of the mass spectrometry experiment.
Journal ArticleDOI

Higher-order structural characterisation of native proteins and complexes by top-down mass spectrometry.

TL;DR: While this work is written primarily from a mass spectrometry perspective, it is targeted to all bioanalytical scientists who are interested in applying these methods to their own biochemistry and chemical biology research.
References
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Journal ArticleDOI

Shape Complementarity at Protein/Protein Interfaces

TL;DR: It is shown using Sc that antibody/antigen interfaces as a whole exhibit poorer shape complementarity than is observed in other systems involving protein/protein interactions.
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Ion mobility-mass spectrometry analysis of large protein complexes.

TL;DR: Within this protocol, general approaches to data interpretation, methods of predicting whether specific model structures for a given protein assembly can be separated by ion mobility, and generalized strategies for data normalization and modeling are covered.
Journal ArticleDOI

Structural symmetry and protein function

TL;DR: Examples have been found for all of the crystallographic point groups, demonstrating that functional need can drive the evolution of any symmetry.
Journal ArticleDOI

Shape complementarity at protein–protein interfaces

TL;DR: A matching algorithm using surface complementarity between receptor and ligand protein molecules is outlined, and it is shown that out of the 16 protein‐protein complexes tried, 15 were successfully docked, including two immunoglobulins.
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