1
|
Luo M, Zhang M, Chi C, Chen G. Affinity-assisted covalent self-assembly of PduQ-SpyTag and Nox-SpyCatcher to construct multi-enzyme complexes on the surface of magnetic microsphere modified with chelated Ni 2. Int J Biol Macromol 2024; 261:129365. [PMID: 38218263 DOI: 10.1016/j.ijbiomac.2024.129365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 12/06/2023] [Accepted: 01/08/2024] [Indexed: 01/15/2024]
Abstract
It is of great significance to study the effect of multi-enzyme aggregation behavior at the interface on the formation of multi-enzyme complexes and their co-catalytic characteristics, which is helpful for us to design and construct immobilized multi-enzyme complex systems for in vitro synthetic biology. Here, a magnetic microsphere with chelated Ni2+, was prepared to explore the self-assembly characteristics of PduQ-SpyTag (P-T) and Nox-SpyCatcher (NC) on its surface, based on the mixed interaction mode consisting the affinity of His-tag/Ni2+ and covalent binding of SpyTag/SpyCatcher. After studying the effect of saturated or unsaturated adsorption of P-T on the covalent binding between P-T and NC at the interface, a possible multienzyme interaction mechanism for the affinity-assisted covalent self-assembly on the Ni2+ chelating surface was proposed. The time evolution of NADH showed that the immobilized P-T/N-C complex formed by this method and the free P-T/N-C complex exhibited similar synergistic catalytic properties, and presented higher catalytic efficiency than the simple mixing of P-T and NC. The optimal catalytic conditions, stability and reusability of the immobilized multi-enzyme complexes prepared in this study were also discussed by comparing them with free enzymes. In this study, we demonstrate a simple and effective strategy for self-assembling SpyTag/SpyCatcher fusion proteins on the surface of magnetic beads, which is inspiring for the construction of more cascade enzyme systems at the interface. It provides a new method for facilitating the rapid construction of immobilized multi-enzyme complexes in vitro from the crude cell lysis.
Collapse
Affiliation(s)
- Mianxing Luo
- Department of Bioengineering and Biotechnology, Huaqiao University, Jimei Ave. 668, Xiamen 361021, China
| | - Meng Zhang
- Department of Bioengineering and Biotechnology, Huaqiao University, Jimei Ave. 668, Xiamen 361021, China
| | - Changbiao Chi
- Department of Bioengineering and Biotechnology, Huaqiao University, Jimei Ave. 668, Xiamen 361021, China
| | - Guo Chen
- Department of Bioengineering and Biotechnology, Huaqiao University, Jimei Ave. 668, Xiamen 361021, China.
| |
Collapse
|
2
|
Wang S, Tsao CY, Motabar D, Li J, Payne GF, Bentley WE. A Redox-Based Autoinduction Strategy to Facilitate Expression of 5xCys-Tagged Proteins for Electrobiofabrication. Front Microbiol 2021; 12:675729. [PMID: 34220759 PMCID: PMC8250426 DOI: 10.3389/fmicb.2021.675729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 05/13/2021] [Indexed: 01/17/2023] Open
Abstract
Biofabrication utilizes biological materials and biological means, or mimics thereof, for assembly. When interfaced with microelectronics, electrobiofabricated assemblies enable exquisite sensing and reporting capabilities. We recently demonstrated that thiolated polyethylene glycol (PEG-SH) could be oxidatively assembled into a thin disulfide crosslinked hydrogel at an electrode surface; with sufficient oxidation, extra sulfenic acid groups are made available for covalent, disulfide coupling to sulfhydryl groups of proteins or peptides. We intentionally introduced a polycysteine tag (5xCys-tag) consisting of five consecutive cysteine residues at the C-terminus of a Streptococcal protein G to enable its covalent coupling to an electroassembled PEG-SH film. We found, however, that its expression and purification from E. coli was difficult, owing to the extra cysteine residues. We developed a redox-based autoinduction methodology that greatly enhanced the yield, especially in the soluble fraction of E. coli extracts. The redox component involved the deletion of oxyRS, a global regulator of the oxidative stress response and the autoinduction component integrated a quorum sensing (QS) switch that keys the secreted QS autoinducer-2 to induction. Interestingly, both methods helped when independently employed and further, when used in combination (i.e., autodinduced oxyRS mutant) the results were best—we found the highest total yield and highest yield in the soluble fraction. We hypothesize that the production host was less prone to severe metabolic perturbations that might reduce yield or drive sequestration of the -tagged protein into inclusion bodies. We expect this methodology will be useful for the expression of many such Cys-tagged proteins, ultimately enabling a diverse array of functionalized devices.
Collapse
Affiliation(s)
- Sally Wang
- Fischell Department of Bioengineering, University of Maryland, College Park, College Park, MD, United States.,Fischell Institute for Biomedical Devices, University of Maryland, College Park, College Park, MD, United States.,Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, College Park, MD, United States
| | - Chen-Yu Tsao
- Fischell Institute for Biomedical Devices, University of Maryland, College Park, College Park, MD, United States.,Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, College Park, MD, United States
| | - Dana Motabar
- Fischell Department of Bioengineering, University of Maryland, College Park, College Park, MD, United States.,Fischell Institute for Biomedical Devices, University of Maryland, College Park, College Park, MD, United States.,Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, College Park, MD, United States
| | - Jinyang Li
- Fischell Department of Bioengineering, University of Maryland, College Park, College Park, MD, United States.,Fischell Institute for Biomedical Devices, University of Maryland, College Park, College Park, MD, United States.,Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, College Park, MD, United States
| | - Gregory F Payne
- Fischell Institute for Biomedical Devices, University of Maryland, College Park, College Park, MD, United States.,Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, College Park, MD, United States
| | - William E Bentley
- Fischell Department of Bioengineering, University of Maryland, College Park, College Park, MD, United States.,Fischell Institute for Biomedical Devices, University of Maryland, College Park, College Park, MD, United States.,Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, College Park, MD, United States
| |
Collapse
|
3
|
Brown AD, Chu S, Kappagantu M, Ghodssi R, Culver JN. Reprogramming Virus Coat Protein Carboxylate Interactions for the Patterned Assembly of Hierarchical Nanorods. Biomacromolecules 2021; 22:2515-2523. [PMID: 33886293 DOI: 10.1021/acs.biomac.1c00258] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The self-assembly system of the rod-shaped tobacco mosaic virus (TMV) has been studied extensively for nanoscale applications. TMV coat protein assembly is modulated by intersubunit carboxylate groups whose electrostatic repulsion limits the assembly of virus rods without incorporating genomic RNA. To engineer assembly control into this system, we reprogrammed intersubunit carboxylate interactions to produce self-assembling coat proteins in the absence of RNA and in response to unique pH and ionic environmental conditions. Specifically, engineering a charge attraction at the intersubunit E50-D77 carboxylate group through a D77K substitution stabilized the coat proteins assembly into virus-like rods. In contrast, the reciprocal E50K modification alone did not confer virus-like rod assembly. However, a combination of R46G/E50K/E97G substitutions enabled virus-like rod assembly. Interestingly, the D77K substitution displays a unique pH-dependent assembly-disassembly profile, while the R46G/E50K/E97G substitutions confer a novel salt concentration dependency for assembly control. In addition, these unique environmentally controlled coat proteins allow for the directed assembly and disassembly of chimeric virus-like rods both in solution and on substrate-attached seed rods. Combined, these findings provide a controllable means to assemble functionally discrete virus-like rods for use in nanotechnology applications.
Collapse
Affiliation(s)
- Adam D Brown
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Sangwook Chu
- Institute for Systems Research, University of Maryland, College Park, Maryland 20742, United States
| | - Madhu Kappagantu
- Institute for Bioscience and Biotechnology Research, University of Maryland, College Park, Maryland 20742, United States
| | - Reza Ghodssi
- Institute for Systems Research, Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - James N Culver
- Institute for Bioscience and Biotechnology Research, Department of Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland 20742, United States
| |
Collapse
|