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Title: In Vitro Assembly of Diverse Bacterial Microcompartment Shell Architectures

Journal Article · · Nano Letters
ORCiD logo [1];  [2];  [1];  [2];  [2];  [2]; ORCiD logo [3]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Michigan State Univ., East Lansing, MI (United States)

Bacterial Microcompartments (BMCs) are organelles composed of a selectively permeable protein shell that encapsulates enzymes involved in CO2 fixation (carboxysomes) or carbon catabolism (metabolosomes). Confinement of sequential reactions by the BMC shell presumably increases the efficiency of the pathway by reducing the crosstalk of metabolites, release of toxic intermediates, and accumulation of inhibitory products. Because BMCs are composed entirely of protein and self-assemble, they are an emerging platform for engineering nanoreactors and molecular scaffolds. However, testing designs for assembly and function through in vivo expression is labor-intensive and has limited the potential of BMCs in bioengineering. Here, we developed a new method for in vitro assembly of defined nanoscale BMC architectures: shells and nanotubes. By inserting a “protecting group”, a short ubiquitin-like modifier (SUMO) domain, self-assembly ofshell proteins in vivo was thwarted, enabling preparation of concentrates of shell building blocks. Addition of the cognate protease removes the SUMO domain and subsequent mixing of the constituent shell proteins in vitro results in the self-assembly of three types of supramolecular architectures: a metabolosome shell, a carboxysome shell, and a BMC protein-based nanotube. We next applied our method to generate a metabolosome shell engineered with a hyper-basic luminal surface, allowing for the encapsulation of biotic or abiotic cargos functionalized with an acidic accessory group. This is the first demonstration of using charge complementarity to encapsulate diverse cargos in BMC shells. Finally, our work provides a generally applicable method for in vitro assembly of natural and engineered BMC-based architectures.

Research Organization:
Michigan State Univ., East Lansing, MI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Institutes of Health (NIH)
Grant/Contract Number:
FG02-91ER20021; 1R01AI14975-01
OSTI ID:
1603663
Journal Information:
Nano Letters, Vol. 18, Issue 11; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

References (45)

Molecules into Cells: Specifying Spatial Architecture journal December 2005
Isolation and characterization of a novel ribonucleoprotein particle: large structures contain a single species of small RNA journal September 1986
Structural basis of enzyme encapsulation into a bacterial nanocompartment journal August 2008
Widespread distribution of encapsulin nanocompartments reveals functional diversity journal March 2017
Bacterial microcompartments journal March 2018
A Taxonomy of Bacterial Microcompartment Loci Constructed by a Novel Scoring Method journal October 2014
Bacterial microcompartments and the modular construction of microbial metabolism journal January 2015
Solution Structure of a Bacterial Microcompartment Targeting Peptide and Its Application in the Construction of an Ethanol Bioreactor journal November 2013
Bacterial microcompartment-directed polyphosphate kinase promotes stable polyphosphate accumulation in E. coli journal February 2017
Bacterial microcompartments moving into a synthetic biological world journal January 2013
Assembly principles and structure of a 6.5-MDa bacterial microcompartment shell journal June 2017
Programmed loading and rapid purification of engineered bacterial microcompartment shells journal July 2018
Arginine-rich cell-penetrating peptides journal November 2009
Use of the confined spaces of apo-ferritin and virus capsids as nanoreactors for catalytic reactions journal April 2015
Encapsulins: microbial nanocompartments with applications in biomedicine, nanobiotechnology and materials science journal October 2016
Dumpster Diving in the Gut: Bacterial Microcompartments as Part of a Host-Associated Lifestyle journal May 2016
Analysis of Carboxysomes from Synechococcus PCC7942 Reveals Multiple Rubisco Complexes with Carboxysomal Proteins CcmM and CcaA journal August 2007
Structural Insight into the Clostridium difficile Ethanolamine Utilisation Microcompartment journal October 2012
Visualization of Bacterial Microcompartment Facet Assembly Using High-Speed Atomic Force Microscopy journal December 2015
Purification and Characterization of Protein Nanotubes Assembled from a Single Bacterial Microcompartment Shell Subunit journal October 2015
Structure of a trimeric bacterial microcompartment shell protein, EtuB, associated with ethanol utilization in Clostridium kluyveri journal September 2009
Structural Insights into Higher Order Assembly and Function of the Bacterial Microcompartment Protein PduA journal May 2014
UniProt: the universal protein knowledgebase journal November 2016
A new protease required for cell-cycle progression in yeast journal March 1999
Assembly of Robust Bacterial Microcompartment Shells Using Building Blocks from an Organelle of Unknown Function journal May 2014
Engineering the Bacterial Microcompartment Domain for Molecular Scaffolding Applications journal July 2017
Engineered synthetic scaffolds for organizing proteins within the bacterial cytoplasm journal December 2017
Using comparative genomics to uncover new kinds of protein-based metabolic organelles in bacteria: Bacterial Microcompartments journal January 2013
Synthesis of Empty Bacterial Microcompartments, Directed Organelle Protein Incorporation, and Evidence of Filament-Associated Organelle Movement journal April 2010
A synthetic system for expression of components of a bacterial microcompartment journal September 2013
Engineered Protein Nano-Compartments for Targeted Enzyme Localization journal March 2012
Engineering nanoreactors using bacterial microcompartment architectures journal June 2018
Protein Structures Forming the Shell of Primitive Bacterial Organelles journal August 2005
Spontaneous non-canonical assembly of CcmK hexameric components from β-carboxysome shells of cyanobacteria journal September 2017
Molecular Interaction Between the Strep-tag Affinity Peptide and its Cognate Target, Streptavidin journal February 1996
Engineering and characterization of a superfolder green fluorescent protein journal December 2005
Transcriptional Regulation of the Escherichia coli Gene rraB , Encoding a Protein Inhibitor of RNase E journal November 2009
Hyper-acidic protein fusion partners improve solubility and assist correct folding of recombinant proteins expressed in Escherichia coli journal July 2008
Encapsulation of multiple cargo proteins within recombinant Eut nanocompartments journal July 2016
De novo design of signal sequences to localize cargo to the 1,2-propanediol utilization microcompartment : Design of Signal Sequences journal April 2017
Bacterial microcompartment assembly: The key role of encapsulation peptides journal May 2015
Efficient in Vitro Encapsulation of Protein Cargo by an Engineered Protein Container journal December 2011
Directed Evolution of a Protein Container journal February 2011
Quantitative Packaging of Active Enzymes into a Protein Cage journal December 2015
Bioinformatic Characterization of Glycyl Radical Enzyme-Associated Bacterial Microcompartments journal September 2015

Cited By (6)

Structural organization of biocatalytic systems: the next dimension of synthetic metabolism journal September 2019
Occurrence and stability of hetero-hexamer associations formed by β-carboxysome CcmK shell components journal October 2019
Self-Assembly Stability and Variability of Bacterial Microcompartment Shell Proteins in Response to the Environmental Change journal February 2019
Functionalization of Bacterial Microcompartment Shell Proteins With Covalently Attached Heme journal January 2020
Occurrence and stability of hetero-hexamer associations formed by β-carboxysome CcmK shell components text January 2019
Apparent size and morphology of bacterial microcompartments varies with technique journal March 2020