The Bush Lab is a research group in the Department of Chemistry and the Biological Physics, Structure & Design Program at the University of Washington. Our research focuses on the development and application of mass spectrometry and ion mobility spectrometry techniques to elucidate the structures and assembly of protein complexes and subcellular machines.

  • Interested in joining the Bush Lab? Click here.
  • Our weekly group meetings are held on Tuesdays at 5:10 PM in CHL 068B.

New NSF Award!

The Bush Lab was just awarded a grant from the National Science Foundation for a project titled “Bridging the Gap Between Observables from Ion Mobility Mass Spectrometry and the Structures of Native Proteins” (1807382). We are excited to pursue this research and are grateful for this financial support from the NSF.

New Publication: Ion Mobility of Proteins in Nitrogen Gas: Effects of Charge State, Charge Distribution, and Structure

Ion Mobility of Proteins in Nitrogen Gas: Effects of Charge State, Charge Distribution, and Structure. Daniele Canzani, Kenneth J. Laszlo, Matthew F. Bush. J. Phys. Chem. A 2018, in press. (Link)

Ion mobility is emerging as a rapid and sensitive tool for structural characterization. Collision cross-section (Ω) values determined using ion mobility are often compared to values calculated for candidate structures generated through molecular modeling. Several methods exist for calculating Ω values, but the trajectory method explicitly includes contributions from long-range, ion–neutral interactions. Recent implementations of the trajectory method have significantly reduced its expense and have made applications to proteins far more tractable. Here, we use ion mobility experiments and trajectory method calculations to characterize the effects of charge state, charge distribution, and structure on the ion mobility of proteins in nitrogen gas. These results show that ion-induced dipole interactions Continue reading

Bush Lab at ASMS 2018

Members of the Bush Lab will present the following talks at American Society for Mass Spectrometry Annual Conference in San Diego (June 3 – 7, 2018):

  • Ion Mobility of Proteins in Nitrogen Gas: Effects of Charge State, Charge Distribution, and Structure Characterized using Trajectory Method Calculations. Daniele Canzani; Matthew F, Bush. (MP 407)
  • Collision-Induced Unfolding and Dissociation Reveal the Location of Ni(II) Binding in the Dimer of the Alpha-Crystallin Domain of HSPB5. Seoyeon Hong; Matthew F. Bush. (MP 745)
  • Memory of the Condensed-Phase in the Gas-Phase: Effects of Solution, Charge, and Energy on Structures of Serum Albumin IonsMeagan Gadzuk-Shea; Matthew F Bush. (WOB 10:10)

We look forward to seeing everyone in San Diego!

Congratulations to Julia Greenwald, recipient of the Bruce Kowalski Award!

Congratulations to Julia Greenwald, who received the Bruce R. Kowalski Award for Multidisciplinary Research. The award is given to the best lightning talk at the Center for Process Analysis and Control annual meeting.

Rae Eaton is named an ACS Division of Analytical Chemistry Graduate Fellow!

Congratulations to Rae Eaton, who just received a Graduate Fellowship from the American Chemical Society Division of Analytical Chemistry! This award is sponsored by Agilent Technologies.

New Publication: Structural characterization of small molecular ions by ion mobility mass spectrometry in nitrogen drift gas

Structural characterization of small molecular ions by ion mobility mass spectrometry in nitrogen drift gas: improving the accuracy of trajectory method calculations. Jong Wha Lee, Hyun Hee L. Lee, Kimberly L. Davidson, Matthew F. Bush, Hugh I. Kim. Analyst 2018, in press. (Link)

The investigation of ion structures based on a combination of ion mobility mass spectrometry (IM-MS) experiments and theoretical collision cross section (CCS) calculations has become important to many fields of research. However, the accuracy of current CCS calculations for ions in nitrogen drift gas limits the information content of many experiments. In particular, few studies have evaluated and attempted to improve the theoretical tools for CCS calculation in nitrogen drift gas. In this study, Continue reading

Research in the Bush Lab Featured in the ACS PRF Annual Report

Our research on “Fundamental Interactions Between Petroleum Ions and Gases” was featured in the most recent annual report from the American Chemical Society Petroleum Research Fund. Congratulations to Kim Davidson and Anna Bakhtina!

New Publication: Collision Cross Sections and Ion Structures

Collision Cross Sections and Ion Structures: Development of a General Calculation Method via High-quality Ion Mobility Measurements and Theoretical Modeling. Jong Wha Lee, Kimberly L. Davidson, Matthew F. Bush, Hugh I. Kim. Analyst 2017, in press. (Link)

Ion mobility mass spectrometry (IM-MS) has become an important tool for the structural investigation of ions in the gas phase. Accurate theoretical evaluation of ion collision cross sections (CCSs) is essential for the effective application of IM-MS in structural studies. However, current theoretical tools have limitations in accurately describing a broad range of ions from small molecules to macromolecules. Continue reading

New Lab Member: Misa

The Bush Lab welcomes Misa! Click here to learn more about Misa.



International Journal of Mass Spectrometry Cover

Congratulations to Kim Davidson, whose research is featured on the cover of the special issue on “New developments and applications of mass spectrometry methods for studying non-covalent protein interactions”.

Nonspecific Aggregation in Native Electrokinetic Nanoelectrospray Ionization. Kimberly L. Davidson; Derek R. Oberreit; Christopher J. Hogan; Matthew F. Bush. Int. J. Mass Spectrom. 2017420, 35–42. (Link | Cover)