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Sutter M, Faulkner M, Aussignargues C, Paasch BC, Barrett S, Kerfeld CA, Liu LN. Visualization of Bacterial Microcompartment Facet Assembly Using High-Speed Atomic Force Microscopy. NANO LETTERS 2016; 16:1590-5. [PMID: 26617073 PMCID: PMC4789755 DOI: 10.1021/acs.nanolett.5b04259] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 11/27/2015] [Indexed: 05/21/2023]
Abstract
Bacterial microcompartments (BMCs) are proteinaceous organelles widespread among bacterial phyla. They compartmentalize enzymes within a selectively permeable shell and play important roles in CO2 fixation, pathogenesis, and microbial ecology. Here, we combine X-ray crystallography and high-speed atomic force microscopy to characterize, at molecular resolution, the structure and dynamics of BMC shell facet assembly. Our results show that preformed hexamers assemble into uniformly oriented shell layers, a single hexamer thick. We also observe the dynamic process of shell facet assembly. Shell hexamers can dissociate from and incorporate into assembled sheets, indicating a flexible intermolecular interaction. Furthermore, we demonstrate that the self-assembly and dynamics of shell proteins are governed by specific contacts at the interfaces of shell proteins. Our study provides novel insights into the formation, interactions, and dynamics of BMC shell facets, which are essential for the design and engineering of self-assembled biological nanoreactors and scaffolds based on BMC architectures.
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Affiliation(s)
- Markus Sutter
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824, United States
- Physical
Biosciences Division, Lawrence Berkeley
National Laboratory, Berkeley, California 94720, United States
| | - Matthew Faulkner
- Institute of Integrative
Biology and Department of Physics, University of Liverpool, Liverpool L69 7ZB, United Kingdom
| | - Clément Aussignargues
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824, United States
| | - Bradley C. Paasch
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824, United States
| | - Steve Barrett
- Institute of Integrative
Biology and Department of Physics, University of Liverpool, Liverpool L69 7ZB, United Kingdom
| | - Cheryl A. Kerfeld
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824, United States
- Physical
Biosciences Division, Lawrence Berkeley
National Laboratory, Berkeley, California 94720, United States
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, California 94720, United States
- Berkeley Synthetic
Biology Institute, Berkeley, California 94720, United States
- Department of Biochemistry and Molecular
Biology, Michigan State University, East Lansing, Michigan 48824, United States
| | - Lu-Ning Liu
- Institute of Integrative
Biology and Department of Physics, University of Liverpool, Liverpool L69 7ZB, United Kingdom
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