|
1
|
Vaidya AJ, Rammohan M, Lee YH, Lee KZ, Chou CY, Hartley Z, Scott CA, Susler RG, Wang L, Loesch-Fries LS, Harris MT, Solomon KV. Engineering Alkaline-Stable Barley Stripe Mosaic Virus-Like Particles for Efficient Surface Modification. Biochem Eng J 2023; 199:109062. [PMID: 37692450 PMCID: PMC10486258 DOI: 10.1016/j.bej.2023.109062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Viruses and virus-like particles are powerful templates for materials synthesis because of their capacity for precise protein engineering and diverse surface functionalization. We recently developed a recombinant bacterial expression system for the production of barley stripe mosaic virus-like particles (BSMV VLPs). However, the applicability of this biotemplate was limited by low stability in alkaline conditions and a lack of chemical handles for ligand attachment. Here, we identify and validate novel residues in the BSMV Caspar carboxylate clusters that mediate virion disassembly through repulsive interactions at high pH. Point mutations of these residues to create attractive interactions that increase rod length ~2 fold, with an average rod length of 91 nm under alkaline conditions. To enable diverse chemical surface functionalization, we also introduce reactive lysine residues at the C-terminus of BSMV coat protein, which is presented on the VLP surface. Chemical conjugation reactions with this lysine proceed more quickly under alkaline conditions. Thus, our alkaline-stable VLP mutants are more suitable for rapid surface functionalization of long nanorods. This work validates novel residues involved in BSMV VLP assembly and demonstrates the feasibility of chemical functionalization of BSMV VLPs for the first time, enabling novel biomedical and chemical applications.
Collapse
Affiliation(s)
- Akash J. Vaidya
- 150 Academy St, Department of Chemical & Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
| | - Mruthula Rammohan
- 150 Academy St, Department of Chemical & Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
| | - Yu-Hsuan Lee
- 480 Stadium Mall Drive, School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, United States
| | - Kok Zhi Lee
- 225 South University Street, Agricultural & Biological Engineering, Purdue University, West Lafayette, IN 47907-2093, United States
- 1203 West State Street, Bindley Bioscience Center, Purdue University, West Lafayette, IN 47906, United States
| | - Che-yu Chou
- 480 Stadium Mall Drive, School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, United States
| | - Zachary Hartley
- 915 West State Street, Plant Genetics, Breeding and Biotechnology Program, Department of Agronomy, Purdue University, West Lafayette, IN 47907, United States
| | - Corren A. Scott
- 480 Stadium Mall Drive, School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, United States
| | - Rachel G. Susler
- 480 Stadium Mall Drive, School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, United States
| | - Longfei Wang
- 915 West State Street, Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, United States
| | - L. Sue Loesch-Fries
- 915 West State Street, Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, United States
| | - Michael T. Harris
- 480 Stadium Mall Drive, School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, United States
| | - Kevin V. Solomon
- 150 Academy St, Department of Chemical & Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
- 225 South University Street, Agricultural & Biological Engineering, Purdue University, West Lafayette, IN 47907-2093, United States
- 1203 West State Street, Bindley Bioscience Center, Purdue University, West Lafayette, IN 47906, United States
- 500 Central Drive, Laboratory of Renewable Resources Engineering (LORRE), Purdue University, West Lafayette, IN, 47907-2022, United States
| |
Collapse
|
|
2
|
Abu-Baker I, Blum AS. Alcohol-perturbed self-assembly of the tobacco mosaic virus coat protein. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2022; 13:355-362. [PMID: 35425690 PMCID: PMC8978915 DOI: 10.3762/bjnano.13.30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 03/18/2022] [Indexed: 06/14/2023]
Abstract
The self-assembly of the tobacco mosaic virus coat protein is significantly altered in alcohol-water mixtures. Alcohol cosolvents stabilize the disk aggregate and prevent the formation of helical rods at low pH. A high alcohol content favours stacked disk assemblies and large rafts, while a low alcohol concentration favours individual disks and short stacks. These effects appear to be caused by the hydrophobicity of the alcohol additive, with isopropyl alcohol having the strongest effect and methanol the weakest. We discuss several effects that may contribute to preventing the protein-protein interactions between disks that are necessary to form helical rods.
Collapse
Affiliation(s)
- Ismael Abu-Baker
- Department of Chemistry, McGill University, Montréal, Québec, Canada
| | | |
Collapse
|