1
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Anny CA, Nouaille S, Fauré R, Schulz C, Spriet C, Huvent I, Biot C, Lefebvre T. A Step-by-Step Guide for the Production of Recombinant Fluorescent TAT-HA-Tagged Proteins and their Transduction into Mammalian Cells. Curr Protoc 2024; 4:e1016. [PMID: 38511507 DOI: 10.1002/cpz1.1016] [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] [Indexed: 03/22/2024]
Abstract
Investigating the function of target proteins for functional prospection or therapeutic applications typically requires the production and purification of recombinant proteins. The fusion of these proteins with tag peptides and fluorescently derived proteins allows the monitoring of candidate proteins using SDS-PAGE coupled with western blotting and fluorescent microscopy, respectively. However, protein engineering poses a significant challenge for many researchers. In this protocol, we describe step-by-step the engineering of a recombinant protein with various tags: TAT-HA (trans-activator of transduction-hemagglutinin), 6×His and EGFP (enhanced green fluorescent protein) or mCherry. Fusion proteins are produced in E. coli BL21(DE3) cells and purified by immobilized metal affinity chromatography (IMAC) using a Ni-nitrilotriacetic acid (NTA) column. Then, tagged recombinant proteins are introduced into cultured animal cells by using the penetrating peptide TAT-HA. Here, we present a thorough protocol providing a detailed guide encompassing every critical step from plasmid DNA molecular assembly to protein expression and subsequent purification and outlines the conditions necessary for protein transduction technology into animal cells in a comprehensive manner. We believe that this protocol will be a valuable resource for researchers seeking an exhaustive, step-by-step guide for the successful production and purification of recombinant proteins and their entry by transduction within living cells. © 2024 The Authors. Current Protocols published by Wiley Periodicals LLC. Basic Protocol 1: DNA cloning, molecular assembly strategies, and protein production Basic Protocol 2: Protein purification Basic Protocol 3: Protein transduction in mammalian cells.
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Affiliation(s)
| | | | - Régis Fauré
- TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France
| | - Céline Schulz
- Université de Lille, CNRS, UMR 8576 - UGSF, Lille, France
| | - Corentin Spriet
- Université de Lille, CNRS, UMR 8576 - UGSF, Lille, France
- Université de Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US 41 - UAR 2014 - PLBS, F-59000, Lille, France
| | | | | | - Tony Lefebvre
- Université de Lille, CNRS, UMR 8576 - UGSF, Lille, France
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2
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Ye Q, Jin X, Gao H, Wei N. Site-Specific and Tunable Co-immobilization of Proteins onto Magnetic Nanoparticles via Spy Chemistry. ACS APPLIED BIO MATERIALS 2022; 5:5665-5674. [PMID: 36194637 DOI: 10.1021/acsabm.2c00709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Co-immobilization of multiple proteins onto one nanosupport has large potential in mimicking natural multiprotein complexes and constructing efficient cascade biocatalytic systems. However, control of different proteins regarding their spatial arrangement and loading ratio remains a big challenge, and protein co-immobilization often requires the use of purified proteins. Herein, built upon our recently designed SpyTag-functionalized magnetic nanoparticles (MNPs), we established a modular MNP platform for site-specific, tunable, and cost-effective protein co-immobilization. SpyCatcher-fused enhanced green fluorescent protein (i.e., EGFP-SpyCatcher) and mCherry red fluorescent protein (i.e., RFP-SpyCatcher) were designed and conjugated on MNPs, and the immobilized proteins showed 3-7-fold enhancement in storage stability and greatly improved stability against the freeze-thaw process compared to free proteins. The protein-conjugated MNPs also retained desirable colloidal stability and magnetic responsiveness, enabling facile proteins' recovery. Also, one-pot co-immobilization of the two proteins could be fine-tuned with their feed ratios. In addition, MNPs could selectively and efficiently co-immobilize both SpyCatcher-fused proteins from combined cell lysates without purification, offering a convenient and cost-effective approach for multiprotein immobilization. This MNP platform provides a facile and efficient tool to construct bionano hybrid materials (i.e., protein-based MNPs) and multiprotein systems for a variety of industrial and green chemistry applications.
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Affiliation(s)
- Quanhui Ye
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 3221 Newmark Civil Engineering Laboratory, 205 N. Mathews Avenue, Urbana, Illinois 61801, United States
| | - Xiuyu Jin
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Haifeng Gao
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Na Wei
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 3221 Newmark Civil Engineering Laboratory, 205 N. Mathews Avenue, Urbana, Illinois 61801, United States
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3
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Aktalay A, Ponsot F, Bossi ML, Belov VN, Hell SW. Cleavable Linker Incorporation into a Synthetic Dye-Nanobody-Fluorescent Protein Assembly: FRET, FLIM and STED Microscopy. Chembiochem 2022; 23:e202200395. [PMID: 35838445 PMCID: PMC9804610 DOI: 10.1002/cbic.202200395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Indexed: 01/05/2023]
Abstract
A bright and photostable fluorescent dye with a disulfide (S-S) linker and maleimide group (Rho594-S2-mal), as cleavable and reactive sites, was synthesized and conjugated with anti-GFP nanobodies (NB). The binding of EGFP (FRET donor) with anti-GFP NB labeled with one or two Rho594-S2-mal residues was studied in vitro and in cellulo. The linker was cleaved with dithiothreitol recovering the donor (FP) signal. The bioconjugates (FP-NB-dye) were applied in FRET-FLIM assays, confocal imaging, and superresolution STED microscopy.
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Affiliation(s)
- Ayse Aktalay
- Department of Optical NanoscopyMax Planck Institute for Medical Research (MPI-MR)Jahnstraße 2969120HeidelbergGermany
| | - Flavien Ponsot
- Department of NanoBiophotonicsMax Planck Institute for Multidisciplinary Sciences (MPI-NAT)Am Fassberg 1137077GöttingenGermany
| | - Mariano L. Bossi
- Department of Optical NanoscopyMax Planck Institute for Medical Research (MPI-MR)Jahnstraße 2969120HeidelbergGermany
| | - Vladimir N. Belov
- Department of NanoBiophotonicsMax Planck Institute for Multidisciplinary Sciences (MPI-NAT)Am Fassberg 1137077GöttingenGermany
| | - Stefan W. Hell
- Department of Optical NanoscopyMax Planck Institute for Medical Research (MPI-MR)Jahnstraße 2969120HeidelbergGermany
- Department of NanoBiophotonicsMax Planck Institute for Multidisciplinary Sciences (MPI-NAT)Am Fassberg 1137077GöttingenGermany
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4
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Co-expression of an isopropanol synthetic operon and eGFP to monitor the robustness of Cupriavidus necator during isopropanol production. Enzyme Microb Technol 2022; 161:110114. [DOI: 10.1016/j.enzmictec.2022.110114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 07/19/2022] [Accepted: 08/16/2022] [Indexed: 11/19/2022]
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5
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Moraskie M, Roshid MHO, O'Connor G, Dikici E, Zingg JM, Deo S, Daunert S. Microbial whole-cell biosensors: Current applications, challenges, and future perspectives. Biosens Bioelectron 2021; 191:113359. [PMID: 34098470 PMCID: PMC8376793 DOI: 10.1016/j.bios.2021.113359] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/13/2021] [Accepted: 05/15/2021] [Indexed: 12/22/2022]
Abstract
Microbial Whole-Cell Biosensors (MWCBs) have seen rapid development with the arrival of 21st century biological and technological capabilities. They consist of microbial species which produce, or limit the production of, a reporter protein in the presence of a target analyte. The quantifiable signal from the reporter protein can be used to determine the bioavailable levels of the target analyte in a variety of sample types at a significantly lower cost than most widely used and well-established analytical instrumentation. Furthermore, the versatile and robust nature of MWCBs shows great potential for their use in otherwise unavailable settings and environments. While MWCBs have been developed for use in biomedical, environmental, and agricultural monitoring, they still face various challenges before they can transition from the laboratory into industrialized settings like their enzyme-based counterparts. In this comprehensive and critical review, we describe the underlying working principles of MWCBs, highlight developments for their use in a variety of fields, detail challenges and current efforts to address them, and discuss exciting implementations of MWCBs helping redefine what is thought to be possible with this expeditiously evolving technology.
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Affiliation(s)
- Michael Moraskie
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA; The Dr. John T. Macdonald Foundation Biomedical Nanotechnology Institute - BioNIUM, University of Miami, Miami, FL, 33136, USA
| | - Md Harun Or Roshid
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA; The Dr. John T. Macdonald Foundation Biomedical Nanotechnology Institute - BioNIUM, University of Miami, Miami, FL, 33136, USA; Department of Chemistry, University of Miami, Miami, FL, 33146, USA
| | - Gregory O'Connor
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA; The Dr. John T. Macdonald Foundation Biomedical Nanotechnology Institute - BioNIUM, University of Miami, Miami, FL, 33136, USA
| | - Emre Dikici
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA; The Dr. John T. Macdonald Foundation Biomedical Nanotechnology Institute - BioNIUM, University of Miami, Miami, FL, 33136, USA
| | - Jean-Marc Zingg
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA; The Dr. John T. Macdonald Foundation Biomedical Nanotechnology Institute - BioNIUM, University of Miami, Miami, FL, 33136, USA
| | - Sapna Deo
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA; The Dr. John T. Macdonald Foundation Biomedical Nanotechnology Institute - BioNIUM, University of Miami, Miami, FL, 33136, USA
| | - Sylvia Daunert
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA; The Dr. John T. Macdonald Foundation Biomedical Nanotechnology Institute - BioNIUM, University of Miami, Miami, FL, 33136, USA; Department of Chemistry, University of Miami, Miami, FL, 33146, USA; The Miami Clinical and Translational Science Institute, University of Miami, Miami, FL, 33146, USA; Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL, 33146, USA.
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6
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Jin X, Ye Q, Wang CW, Wu Y, Ma K, Yu S, Wei N, Gao H. Magnetic Nanoplatforms for Covalent Protein Immobilization Based on Spy Chemistry. ACS APPLIED MATERIALS & INTERFACES 2021; 13:44147-44156. [PMID: 34515459 DOI: 10.1021/acsami.1c14670] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Immobilization of proteins on magnetic nanoparticles (MNPs) is an effective approach to improve protein stability and facilitate separation of immobilized proteins for repeated use. Herein, we exploited the efficient SpyTag-SpyCatcher chemistry for conjugation of functional proteins onto MNPs and established a robust magnetic-responsive nanoparticle platform for protein immobilization. To maximize the loading capacity and achieve outstanding water dispersity, the SpyTag peptide was incorporated into the surface-charged polymers of MNPs, which provided abundant active sites for Spy chemistry while maintaining excellent colloidal stability in buffer solution. Conjugation between enhanced green fluorescence protein (EGFP)-SpyCatcher-fused proteins and SpyTag-functionalized MNPs was efficient at ambient conditions without adding enzymes or chemical cross-linkers. Benefiting from the excellent water dispersity and interface compatibility, the surface Spy reaction has fast kinetics, which is comparable to that of the solution Spy reaction. No activity loss was observed on EGFP after conjugation due to the site-selective nature of Spy chemistry. The immobilization process of EGFP on MNPs was highly specific and robust, which was not affected by the presence of other proteins and detergents, such as bovine serum albumin and Tween 20. The MNP platform was demonstrated to be protective to the conjugated EGFP and significantly improved the shelf life of immobilized proteins. In addition, experiments confirmed the retained magnetophoresis of the MNP after protein loading, demonstrating fast MNP recovery under an external magnetic field. This MNP is expected to provide a versatile and modular platform to achieve effective and specific immobilization of other functional proteins, enabling easy reuse and storage.
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Affiliation(s)
- Xiuyu Jin
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Quanhui Ye
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Chien-Wei Wang
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Ying Wu
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Kangling Ma
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Sihan Yu
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Na Wei
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Haifeng Gao
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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7
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Kelly MP, Napolitano T, Anand P, Ho JSK, Jabeen S, Kuppan J, Manir S, Holford M. Induced Disassembly of a Virus-like Particle under Physiological Conditions for Venom Peptide Delivery. Bioconjug Chem 2020; 32:111-120. [PMID: 33306347 DOI: 10.1021/acs.bioconjchem.0c00494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Virus-like particles (VLPs) show considerable promise for the in vivo delivery of therapeutic compounds such as bioactive venom peptides. While loading and targeting protocols have been developed for numerous VLP prototypes, induced disassembly under physiological conditions of neutral pH, moderate temperature, and aqueous medium remain a challenge. Here, we implement and evaluate a general mechanism, based on ring-opening metathesis polymerization (ROMP), for controllable VLP disassembly. This mechanism is independent of cell-specific factors or the manipulation of environmental conditions such as pH and temperature that cannot be readily controlled in vivo. The ROMP substrate norbornene is covalently conjugated to surface-exposed lysine residues of a P22 bacteriophage-derived VLP, and ROMP is induced by treatment with the water-soluble ruthenium catalyst AquaMet. Disruption of the P22 shell and release of a GFP reporter is confirmed via native agarose electrophoresis, TEM, and dynamic light scattering (DLS) analyses. Our ROMP disassembly strategy does not depend on the particular structure or morphology of the P22 nanocontainer and is adaptable to other VLP prototypes for the potential delivery of venom peptides for pharmacological applications.
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Affiliation(s)
- M Patrick Kelly
- Department of Chemistry and Biochemistry, Hunter College, 695 Park Avenue, New York, New York 10065, United States.,The Ph.D. Programs in Biochemistry, Chemistry and Biology Graduate Center of the City University of New York, 365 5th Avenue, New York, New York 10016, United States
| | - Tanya Napolitano
- Department of Chemistry and Biochemistry, Hunter College, 695 Park Avenue, New York, New York 10065, United States.,The Ph.D. Programs in Biochemistry, Chemistry and Biology Graduate Center of the City University of New York, 365 5th Avenue, New York, New York 10016, United States
| | - Prachi Anand
- Department of Chemistry and Biochemistry, Hunter College, 695 Park Avenue, New York, New York 10065, United States
| | - Justin S K Ho
- Department of Chemistry and Biochemistry, Hunter College, 695 Park Avenue, New York, New York 10065, United States
| | - Shakeela Jabeen
- Department of Chemistry and Biochemistry, Hunter College, 695 Park Avenue, New York, New York 10065, United States.,The Ph.D. Programs in Biochemistry, Chemistry and Biology Graduate Center of the City University of New York, 365 5th Avenue, New York, New York 10016, United States
| | - Jessica Kuppan
- Department of Chemistry and Biochemistry, Hunter College, 695 Park Avenue, New York, New York 10065, United States
| | - Sujoy Manir
- Department of Chemistry and Biochemistry, Hunter College, 695 Park Avenue, New York, New York 10065, United States
| | - Mandë Holford
- Department of Chemistry and Biochemistry, Hunter College, 695 Park Avenue, New York, New York 10065, United States.,The Ph.D. Programs in Biochemistry, Chemistry and Biology Graduate Center of the City University of New York, 365 5th Avenue, New York, New York 10016, United States.,Department of Invertebrate Zoology, The American Museum of Natural History, New York, New York 10024, United States.,Department of Biochemistry, Weill Cornell Medicine, 413 E. 69th Street, New York, New York 10021, United States
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8
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Song CP, Ooi CW, Tey BT, Lu CX, Liu BL, Chang YK. Direct recovery of enhanced green fluorescent protein from unclarified Escherichia coli homogenate using ion exchange chromatography in stirred fluidized bed. Int J Biol Macromol 2020; 164:4455-4465. [DOI: 10.1016/j.ijbiomac.2020.09.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 09/05/2020] [Accepted: 09/08/2020] [Indexed: 02/06/2023]
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9
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Roehrkasse AM, Warner ML, Booe JM, Pioszak AA. Biochemical characterization of G protein coupling to calcitonin gene-related peptide and adrenomedullin receptors using a native PAGE assay. J Biol Chem 2020; 295:9736-9751. [PMID: 32487746 PMCID: PMC7363127 DOI: 10.1074/jbc.ra120.013854] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 05/27/2020] [Indexed: 11/06/2022] Open
Abstract
Calcitonin gene-related peptide (CGRP), adrenomedullin (AM), and adrenomedullin 2/intermedin (AM2/IMD) have overlapping and unique functions in the nervous and circulatory systems including vasodilation, cardioprotection, and pain transmission. Their actions are mediated by the class B calcitonin-like G protein-coupled receptor (CLR), which heterodimerizes with three receptor activity-modifying proteins (RAMP1-3) that determine its peptide ligand selectivity. How the three agonists and RAMPs modulate CLR binding to transducer proteins remains poorly understood. Here, we biochemically characterized agonist-promoted G protein coupling to each CLR·RAMP complex. We adapted a native PAGE method to assess the formation and thermostabilities of detergent-solubilized fluorescent protein-tagged CLR·RAMP complexes expressed in mammalian cells. Addition of agonist and the purified Gs protein surrogate mini-Gs (mGs) yielded a mobility-shifted agonist·CLR·RAMP·mGs quaternary complex gel band that was sensitive to antagonists. Measuring the apparent affinities of the agonists for the mGs-coupled receptors and of mGs for the agonist-occupied receptors revealed that both ligand and RAMP control mGs coupling and defined how agonist engagement of the CLR extracellular and transmembrane domains affects transducer recruitment. Using mini-Gsq and -Gsi chimeras, we observed a coupling rank order of mGs > mGsq > mGsi for each receptor. Last, we demonstrated the physiological relevance of the native gel assays by showing that they can predict the cAMP-signaling potencies of AM and AM2/IMD chimeras. These results highlight the power of the native PAGE assay for membrane protein biochemistry and provide a biochemical foundation for understanding the molecular basis of shared and distinct signaling properties of CGRP, AM, and AM2/IMD.
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Affiliation(s)
- Amanda M Roehrkasse
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Margaret L Warner
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Jason M Booe
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Augen A Pioszak
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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10
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Eggenstein E, Richter A, Skerra A. FluoroCalins: engineered lipocalins with novel binding functions fused to a fluorescent protein for applications in biomolecular imaging and detection. Protein Eng Des Sel 2019; 32:289-296. [PMID: 31927584 DOI: 10.1093/protein/gzz047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 12/03/2019] [Indexed: 11/14/2022] Open
Abstract
FluoroCalins represent novel bifunctional protein reagents derived from engineered lipocalins fused to a fluorescent reporter protein, here the enhanced green fluorescent protein (eGFP). We demonstrate the construction, facile bacterial production and broad applicability of FluoroCalins using two Anticalin® molecules directed against the tumor vasculature-associated extra domain B of fibronectin (ED-B) and the vascular endothelial growth factor receptor 3, a marker of tumor and lymphangiogenesis. FluoroCalins were prepared with two different spacers: (i) a short Ser3Ala linker and (ii) a long hydrophilic and conformationally unstructured PASylation® polypeptide comprising 200 Pro, Ala and Ser residues. These FluoroCalins were applied for direct target quantification in enzyme-linked immunosorbent assay as well as target detection by flow cytometry and fluorescence microscopy of live and fixed cells, respectively, demonstrating high specificity and signal-to-noise ratio. Hence, FluoroCalins offer a promising alternative to antibody-based reagents for state of the art fluorescent in vitro detection and biomolecular imaging.
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Affiliation(s)
- Evelyn Eggenstein
- Lehrstuhl für Biologische Chemie, Technische Universität München, Emil-Erlenmeyer-Forum 5, 85354 Freising, Germany
| | - Antonia Richter
- Lehrstuhl für Biologische Chemie, Technische Universität München, Emil-Erlenmeyer-Forum 5, 85354 Freising, Germany
| | - Arne Skerra
- Lehrstuhl für Biologische Chemie, Technische Universität München, Emil-Erlenmeyer-Forum 5, 85354 Freising, Germany
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11
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Sengupta A, Sunder AV, Sohoni SV, Wangikar PP. Fine-Tuning Native Promoters of Synechococcus elongatus PCC 7942 To Develop a Synthetic Toolbox for Heterologous Protein Expression. ACS Synth Biol 2019; 8:1219-1223. [PMID: 30973704 DOI: 10.1021/acssynbio.9b00066] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The cyanobacterium Synechococcus elongatus PCC 7942 is a potential photosynthetic cell-factory. In this study, two native promoters from S. elongatus PCC 7942 driving the expression of abundant cyanobacterial proteins phycocyanin (P cpcB7942) and RuBisCO (P rbc7942) were characterized in relation to their sequence features, expression levels, diurnal behavior, and regulation by light and CO2, major abiotic factors important for cyanobacterial growth. P cpcB7942 was repressed under high light intensity, but cultivation at higher CO2 concentration was able to recover promoter activity. On the other hand, P rbc7942 was repressed by elevated CO2 with a negative regulatory region between 300 and 225 bp. Removal of this region flipped the effect of CO2 with Rbc225 being activated only at high CO2 concentration, besides leading to the loss of circadian rhythm. The results from this study on promoter features and regulation will help expand the repertoire of tools for pathway engineering in cyanobacteria.
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12
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Ghosh RP, Franklin JM, Draper WE, Shi Q, Beltran B, Spakowitz AJ, Liphardt JT. A fluorogenic array for temporally unlimited single-molecule tracking. Nat Chem Biol 2019; 15:401-409. [PMID: 30858596 DOI: 10.1038/s41589-019-0241-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 01/29/2019] [Indexed: 12/15/2022]
Abstract
We describe three optical tags, ArrayG, ArrayD and ArrayG/N, for intracellular tracking of single molecules over milliseconds to hours. ArrayG is a fluorogenic tag composed of a green fluorescent protein-nanobody array and monomeric wild-type green fluorescent protein binders that are initially dim but brighten ~26-fold on binding with the array. By balancing the rates of binder production, photobleaching and stochastic binder exchange, we achieve temporally unlimited tracking of single molecules. High-speed tracking of ArrayG-tagged kinesins and integrins for thousands of frames reveals novel dynamical features. Tracking of single histones at 0.5 Hz for >1 hour with the import competent ArrayG/N tag shows that chromosomal loci behave as Rouse polymers with visco-elastic memory and exhibit a non-Gaussian displacement distribution. ArrayD, based on a dihydrofolate reductase nanobody array and dihydrofolate reductase-fluorophore binder, enables dual-color imaging. The arrays combine brightness, fluorogenicity, fluorescence replenishment and extended fluorophore choice, opening new avenues for tracking single molecules in living cells.
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Affiliation(s)
- Rajarshi P Ghosh
- Bioengineering, Stanford University, Stanford, CA, USA.,BioX Institute, Stanford University, Stanford, CA, USA.,ChEM-H, Stanford University, Stanford, CA, USA.,Cell Biology Division, Stanford Cancer Institute, Stanford, CA, USA
| | - J Matthew Franklin
- Bioengineering, Stanford University, Stanford, CA, USA.,BioX Institute, Stanford University, Stanford, CA, USA.,ChEM-H, Stanford University, Stanford, CA, USA.,Cell Biology Division, Stanford Cancer Institute, Stanford, CA, USA.,Biophysics, Stanford University, Stanford, CA, USA
| | - Will E Draper
- Bioengineering, Stanford University, Stanford, CA, USA.,BioX Institute, Stanford University, Stanford, CA, USA.,ChEM-H, Stanford University, Stanford, CA, USA.,Cell Biology Division, Stanford Cancer Institute, Stanford, CA, USA
| | - Quanming Shi
- Bioengineering, Stanford University, Stanford, CA, USA.,BioX Institute, Stanford University, Stanford, CA, USA.,ChEM-H, Stanford University, Stanford, CA, USA.,Cell Biology Division, Stanford Cancer Institute, Stanford, CA, USA
| | | | - Andrew J Spakowitz
- BioX Institute, Stanford University, Stanford, CA, USA.,Chemical Engineering, Stanford University, Stanford, CA, USA.,Applied Physics, Stanford University, Stanford, CA, USA.,Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - Jan T Liphardt
- Bioengineering, Stanford University, Stanford, CA, USA. .,BioX Institute, Stanford University, Stanford, CA, USA. .,ChEM-H, Stanford University, Stanford, CA, USA. .,Cell Biology Division, Stanford Cancer Institute, Stanford, CA, USA.
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13
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Tsuboi S, Jin T. BRET based dual-colour (visible/near-infrared) molecular imaging using a quantum dot/EGFP–luciferase conjugate. RSC Adv 2019; 9:34964-34971. [PMID: 35530680 PMCID: PMC9074158 DOI: 10.1039/c9ra07011g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 10/17/2019] [Indexed: 12/25/2022] Open
Abstract
Owing to its high sensitivity, bioluminescence imaging is an important tool for biosensing and bioimaging in life sciences. Compared to fluorescence imaging, bioluminescence imaging has a superior advantage that the background signals resulting from autofluorescence are almost zero. In addition, bioluminescence imaging can permit long-term observation of living cells because external excitation is not needed, leading to no photobleaching and photocytotoxicity. Although bioluminescence imaging has such superior properties over fluorescence imaging, observation wavelengths in bioluminescence imaging are mostly limited to the visible region. Here we present bioluminescence resonance energy transfer (BRET) based dual-colour (visible/near-infrared) molecular imaging using a quantum dot (QD) and luciferase protein conjugate. This bioluminescent probe is designed to emit green and near-infrared luminescence from enhanced green fluorescent protein (EGFP) and CdSeTe/CdS (core/shell) QDs, where EGFP–Renilla luciferase (RLuc) fused proteins are conjugated to the QDs. Since the EGFP–RLuc fused protein contains an immunoglobulin binding domain (GB1) of protein G, it is possible to prepare a variety of molecular imaging probes functionalized with antibodies (IgG). We show that the BRET-based QD probe can be used for highly sensitive dual-colour (visible/near-infrared) bioluminescence molecular imaging of membrane receptors in cancer cells. A bioluminescent dual-colour molecular-imaging probe was prepared to emit green and near-infrared luminescence from a conjugate between enhanced green fluorescent protein (EGFP), Renilla luciferase (RLuc) and CdSeTe/CdS quantum dot (QD).![]()
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Affiliation(s)
- Setsuko Tsuboi
- RIKEN Center for Biosystems Dynamics Research (BDR)
- Osaka 565-0874
- Japan
| | - Takashi Jin
- RIKEN Center for Biosystems Dynamics Research (BDR)
- Osaka 565-0874
- Japan
- Graduate School of Frontier Biosciences
- Osaka University
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14
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Kaveh-Baghbaderani Y, Blank-Shim SA, Koch T, Berensmeier S. Selective release of overexpressed recombinant proteins from E. coli cells facilitates one-step chromatographic purification of peptide-tagged green fluorescent protein variants. Protein Expr Purif 2018; 152:155-160. [DOI: 10.1016/j.pep.2018.07.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 07/25/2018] [Accepted: 07/27/2018] [Indexed: 11/28/2022]
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15
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Song CP, Liew PE, Teh Z, Lim SP, Show PL, Ooi CW. Purification of the Recombinant Green Fluorescent Protein Using Aqueous Two-Phase System Composed of Recyclable CO 2-Based Alkyl Carbamate Ionic Liquid. Front Chem 2018; 6:529. [PMID: 30430106 PMCID: PMC6220422 DOI: 10.3389/fchem.2018.00529] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 10/11/2018] [Indexed: 02/04/2023] Open
Abstract
The formation of aqueous two-phase system (ATPS) with the environmentally friendly and recyclable ionic liquid has been gaining popularity in the field of protein separation. In this study, the ATPSs comprising N,N-dimethylammonium N′,N′-dimethylcarbamate (DIMCARB) and thermo-responsive poly(propylene) glycol (PPG) were applied for the recovery of recombinant green fluorescent protein (GFP) derived from Escherichia coli. The partition behavior of GFP in the PPG + DIMCARB + water system was investigated systematically by varying the molecular weight of PPG and the total composition of ATPS. Overall, GFP was found to be preferentially partitioned to the hydrophilic DIMCARB-rich phase. An ATPS composed of 42% (w/w) PPG 1000 and 4.4% (w/w) DIMCARB gave the optimum performance in terms of GFP selectivity (1,237) and yield (98.8%). The optimal system was also successfully scaled up by 50 times without compromising the purification performance. The bottom phase containing GFP was subjected to rotary evaporation of DIMCARB. The stability of GFP was not affected by the distillation of DIMCARB, and the DIMCARB was successfully recycled in three successive rounds of GFP purification. The potential of PPG + DIMCARB + water system as a sustainable protein purification tool is promising.
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Affiliation(s)
- Cher Pin Song
- Chemical Engineering Discipline, School of Engineering, Selangor, Malaysia.,Advanced Engineering Platform, School of Engineering, Monash University Malaysia, Selangor, Malaysia
| | - Poh En Liew
- Chemical Engineering Discipline, School of Engineering, Selangor, Malaysia
| | - Zora Teh
- Chemical Engineering Discipline, School of Engineering, Selangor, Malaysia
| | - Schian Pei Lim
- Chemical Engineering Discipline, School of Engineering, Selangor, Malaysia
| | - Pau Loke Show
- Bioseparation Research Group, Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia, Selangor, Malaysia
| | - Chien Wei Ooi
- Chemical Engineering Discipline, School of Engineering, Selangor, Malaysia
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16
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Development of a high-content imaging assay for screening compound aggregation. Anal Biochem 2018; 559:30-33. [PMID: 30142329 DOI: 10.1016/j.ab.2018.08.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 08/01/2018] [Accepted: 08/20/2018] [Indexed: 10/28/2022]
Abstract
Aggregated compounds can promiscuously and nonspecifically associate with proteins resulting in either false inhibition or activation of many different protein target classes. We developed a high-content imaging assay in a 384-well format using fluorescently labeled target proteins and an Operetta cell imager to screen for compound aggregates that interact with target proteins. The high-throughput assay can not only directly detect the interaction between compound aggregators and the target of interest, but also determine the critical aggregation concentration (CAC) of a given promiscuous small molecule.
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17
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Kaliszewski MJ, Shi X, Hou Y, Lingerak R, Kim S, Mallory P, Smith AW. Quantifying membrane protein oligomerization with fluorescence cross-correlation spectroscopy. Methods 2018; 140-141:40-51. [PMID: 29448037 DOI: 10.1016/j.ymeth.2018.02.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 12/17/2017] [Accepted: 02/07/2018] [Indexed: 01/27/2023] Open
Abstract
Fluorescence cross-correlation spectroscopy (FCCS) is an advanced fluorescence technique that can quantify protein-protein interactions in vivo. Due to the dynamic, heterogeneous nature of the membrane, special considerations must be made to interpret FCCS data accurately. In this study, we describe a method to quantify the oligomerization of membrane proteins tagged with two commonly used fluorescent probes, mCherry (mCH) and enhanced green (eGFP) fluorescent proteins. A mathematical model is described that relates the relative cross-correlation value (fc) to the degree of oligomerization. This treatment accounts for mismatch in the confocal volumes, combinatoric effects of using two fluorescent probes, and the presence of non-fluorescent probes. Using this model, we calculate a ladder of fc values which can be used to determine the oligomer state of membrane proteins from live-cell experimental data. Additionally, a probabilistic mathematical simulation is described to resolve the affinity of different dimeric and oligomeric protein controls.
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Affiliation(s)
| | - Xiaojun Shi
- Department of Chemistry, University of Akron, Akron, OH 44325, USA
| | - Yixuan Hou
- Food Animal Health Research Program, Ohio Agriculture Research and Development Center, Department of Veterinary Preventive Medicine, The Ohio State University, Wooster, OH 44691, USA
| | - Ryan Lingerak
- Department of Biology, University of Akron, Akron, OH 44325, USA
| | - Soyeon Kim
- Department of Chemistry, University of Akron, Akron, OH 44325, USA
| | - Paul Mallory
- Department of Chemistry, University of Akron, Akron, OH 44325, USA
| | - Adam W Smith
- Department of Chemistry, University of Akron, Akron, OH 44325, USA.
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18
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Gregor C, Sidenstein SC, Andresen M, Sahl SJ, Danzl JG, Hell SW. Novel reversibly switchable fluorescent proteins for RESOLFT and STED nanoscopy engineered from the bacterial photoreceptor YtvA. Sci Rep 2018; 8:2724. [PMID: 29426833 PMCID: PMC5807511 DOI: 10.1038/s41598-018-19947-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 01/10/2018] [Indexed: 01/05/2023] Open
Abstract
The reversibly switchable fluorescent proteins (RSFPs) commonly used for RESOLFT nanoscopy have been developed from fluorescent proteins of the GFP superfamily. These proteins are bright, but exhibit several drawbacks such as relatively large size, oxygen-dependence, sensitivity to low pH, and limited switching speed. Therefore, RSFPs from other origins with improved properties need to be explored. Here, we report the development of two RSFPs based on the LOV domain of the photoreceptor protein YtvA from Bacillus subtilis. LOV domains obtain their fluorescence by association with the abundant cellular cofactor flavin mononucleotide (FMN). Under illumination with blue and ultraviolet light, they undergo a photocycle, making these proteins inherently photoswitchable. Our first improved variant, rsLOV1, can be used for RESOLFT imaging, whereas rsLOV2 proved useful for STED nanoscopy of living cells with a resolution of down to 50 nm. In addition to their smaller size compared to GFP-related proteins (17 kDa instead of 27 kDa) and their usability at low pH, rsLOV1 and rsLOV2 exhibit faster switching kinetics, switching on and off 3 times faster than rsEGFP2, the fastest-switching RSFP reported to date. Therefore, LOV-domain-based RSFPs have potential for applications where the switching speed of GFP-based proteins is limiting.
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Affiliation(s)
- Carola Gregor
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany.
| | - Sven C Sidenstein
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany.,Abberior Instruments GmbH, Hans-Adolf-Krebs-Weg 1, 37077, Göttingen, Germany
| | - Martin Andresen
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany
| | - Steffen J Sahl
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany
| | - Johann G Danzl
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany.,Institute of Science and Technology Austria (IST Austria), Am Campus 1, 3400, Klosterneuburg, Austria
| | - Stefan W Hell
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077, Göttingen, Germany. .,Max Planck Institute for Medical Research, Department of Optical Nanoscopy, Jahnstraße 29, 69120, Heidelberg, Germany.
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19
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Lo SC, Ramanan RN, Tey BT, Tan WS, Show PL, Ling TC, Ooi CW. Purification of the recombinant enhanced green fluorescent protein from Escherichia coli using alcohol + salt aqueous two-phase systems. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.09.072] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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20
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Sharma J, Uchida M, Miettinen HM, Douglas T. Modular interior loading and exterior decoration of a virus-like particle. NANOSCALE 2017; 9:10420-10430. [PMID: 28702648 PMCID: PMC6482854 DOI: 10.1039/c7nr03018e] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Virus-like particles (VLPs) derived from the bacteriophage P22 offer an interesting and malleable platform for encapsulation and multivalent presentation of cargo molecules. The packaging of cargo in P22 VLP is typically achieved through genetically enabled directed in vivo encapsulation. However, this approach does not allow control over the packing density and composition of the encapsulated cargos. Here, we have adopted an in vitro assembly approach to gain control over cargo packaging in P22. The packaging was controlled by closely regulating the stoichiometric ratio of cargo-fused-scaffold protein and wild-type scaffold protein during the in vitro assembly. In a "one-pot assembly reaction" coat protein subunits were incubated with varied ratios of wild-type scaffold protein and cargo-fused-scaffold protein, which resulted in the encapsulation of both components in a co-assembled capsid. These experiments demonstrate that an input stoichiometry can be used to achieve controlled packaging of multiple cargos within the VLP. The porous nature of P22 allows the escape and re-entry of wild-type scaffold protein from the assembled capsid but scaffold protein fused to a protein-cargo cannot traverse the capsid shell due to the size of the cargo. This has allowed us to control and alter the packing density by selectively releasing wild-type scaffold protein from the co-assembled capsids. We have demonstrated these concepts in the P22 system using an encapsulated streptavidin protein and have shown its highly selective interaction with biotin or biotin derivatives. Additionally, this system can be used to encapsulate small molecules coupled to biotin, or display large proteins, that cannot enter the capsid and thus remain available for the multivalent display on the exterior of the capsid when attached to a flexible biotinylated linker. Thus, we have developed a P22 system with controlled protein cargo composition and packing density, to which both small and large molecules can be attached at high copy number on the interior or exterior of the capsid.
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Affiliation(s)
- Jhanvi Sharma
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, USA.
| | - Masaki Uchida
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, USA.
| | - Heini M Miettinen
- Department of Microbiology & Immunology, Montana State University, PO Box 173520, Bozeman, Montana 59717, USA
| | - Trevor Douglas
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, USA.
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21
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Kucher S, Korneev S, Tyagi S, Apfelbaum R, Grohmann D, Lemke EA, Klare JP, Steinhoff HJ, Klose D. Orthogonal spin labeling using click chemistry for in vitro and in vivo applications. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2017; 275:38-45. [PMID: 27992783 DOI: 10.1016/j.jmr.2016.12.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 11/30/2016] [Accepted: 12/01/2016] [Indexed: 06/06/2023]
Abstract
Site-directed spin labeling for EPR- and NMR spectroscopy has mainly been achieved exploiting the specific reactivity of cysteines. For proteins with native cysteines or for in vivo applications, an alternative coupling strategy is required. In these cases click chemistry offers major benefits by providing a fast and highly selective, biocompatible reaction between azide and alkyne groups. Here, we establish click chemistry as a tool to target unnatural amino acids in vitro and in vivo using azide- and alkyne-functionalized spin labels. The approach is compatible with a variety of labels including reduction-sensitive nitroxides. Comparing spin labeling efficiencies from the copper-free with the strongly reducing copper(I)-catalyzed azide-alkyne click reaction, we find that the faster kinetics for the catalyzed reaction outrun reduction of the labile nitroxide spin labels and allow quantitative labeling yields within short reaction times. Inter-spin distance measurements demonstrate that the novel side chain is suitable for paramagnetic NMR- or EPR-based conformational studies of macromolecular complexes.
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Affiliation(s)
- Svetlana Kucher
- Department of Physics, University of Osnabrück, Barbarastr. 7, 49076 Osnabrück, Germany
| | - Sergei Korneev
- Department of Biology & Chemistry, Barbarastr. 11, 49076 Osnabrück, Germany
| | - Swati Tyagi
- Structural and Computational Biology Unit, Cell Biology and Biophysics Unit, EMBL, Meyerhofstr. 1, 69117 Heidelberg, Germany
| | - Ronja Apfelbaum
- Physical and Theoretical Chemistry, Technical University of Braunschweig, Hans-Sommer-Str. 10, 38106 Braunschweig, Germany
| | - Dina Grohmann
- Physical and Theoretical Chemistry, Technical University of Braunschweig, Hans-Sommer-Str. 10, 38106 Braunschweig, Germany
| | - Edward A Lemke
- Structural and Computational Biology Unit, Cell Biology and Biophysics Unit, EMBL, Meyerhofstr. 1, 69117 Heidelberg, Germany
| | - Johann P Klare
- Department of Physics, University of Osnabrück, Barbarastr. 7, 49076 Osnabrück, Germany
| | - Heinz-Jürgen Steinhoff
- Department of Physics, University of Osnabrück, Barbarastr. 7, 49076 Osnabrück, Germany.
| | - Daniel Klose
- Department of Physics, University of Osnabrück, Barbarastr. 7, 49076 Osnabrück, Germany.
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22
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Dormeshkin D, Gilep A, Sergeev G, Usanov S. Development of CYB5-fusion monitoring system for efficient periplasmic expression of multimeric proteins in Escherichia coli. Protein Expr Purif 2016; 128:60-6. [DOI: 10.1016/j.pep.2016.08.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 08/05/2016] [Accepted: 08/10/2016] [Indexed: 11/15/2022]
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23
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Azevedo A, Prado A, Issa J, Gerlach R. Matrix metalloproteinase 2 fused to GFP, expressed in E. coli, successfully tracked MMP-2 distribution in vivo. Int J Biol Macromol 2016; 89:737-45. [DOI: 10.1016/j.ijbiomac.2016.05.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 05/03/2016] [Accepted: 05/04/2016] [Indexed: 01/22/2023]
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24
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Nadeau JL, Cho YB, Kühn J, Liewer K. Improved Tracking and Resolution of Bacteria in Holographic Microscopy Using Dye and Fluorescent Protein Labeling. Front Chem 2016; 4:17. [PMID: 27242995 PMCID: PMC4874365 DOI: 10.3389/fchem.2016.00017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 03/31/2016] [Indexed: 11/15/2022] Open
Abstract
Digital holographic microscopy (DHM) is an emerging imaging technique that permits instantaneous capture of a relatively large sample volume. However, large volumes usually come at the expense of lower spatial resolution, and the technique has rarely been used with prokaryotic cells due to their small size and low contrast. In this paper we demonstrate the use of a Mach-Zehnder dual-beam instrument for imaging of labeled and unlabeled bacteria and microalgae. Spatial resolution of 0.3 μm is achieved, providing a sampling of several pixels across a typical prokaryotic cell. Both cellular motility and morphology are readily recorded. The use of dyes provides both amplitude and phase contrast improvement and is of use to identify cells in dense samples.
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Affiliation(s)
- Jay L Nadeau
- Graduate Aerospace Laboratories, California Institute of TechnologyPasadena, CA, USA; Department of Biomedical Engineering, McGill UniversityMontreal, QC, Canada
| | - Yong Bin Cho
- Graduate Aerospace Laboratories, California Institute of TechnologyPasadena, CA, USA; Department of Biomedical Engineering, McGill UniversityMontreal, QC, Canada
| | - Jonas Kühn
- Graduate Aerospace Laboratories, California Institute of TechnologyPasadena, CA, USA; Institute for Astronomy, ETH ZürichZürich, Switzerland
| | - Kurt Liewer
- Jet Propulsion Laboratory, California Institute of Technology Pasadena, CA, USA
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25
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Klein G, Devineau S, Aude JC, Boulard Y, Pasquier H, Labarre J, Pin S, Renault JP. Interferences of Silica Nanoparticles in Green Fluorescent Protein Folding Processes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:195-202. [PMID: 26649773 DOI: 10.1021/acs.langmuir.5b03890] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We investigated the relationship between unfolded proteins, silica nanoparticles and chaperonin to determine whether unfolded proteins could stick to silica surfaces and how this process could impair heat shock protein activity. The HSP60 catalyzed green fluorescent protein (GFP) folding was used as a model system. The adsorption isotherms and adsorption kinetics of denatured GFP were measured, showing that denaturation increases GFP affinity for silica surfaces. This affinity is maintained even if the surfaces are covered by a protein corona and allows silica NPs to interfere directly with GFP folding by trapping it in its unstructured state. We determined also the adsorption isotherms of HSP60 and its chaperonin activity once adsorbed, showing that SiO2 NP can interfere also indirectly with protein folding through chaperonin trapping and inhibition. This inhibition is specifically efficient when NPs are covered first with a layer of unfolded proteins. These results highlight for the first time the antichaperonin activity of silica NPs and ask new questions about the toxicity of such misfolded proteins/nanoparticles assembly toward cells.
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Affiliation(s)
- Géraldine Klein
- NIMBE, CEA/DSM/IRAMIS et UMR3685 CNRS, CEA-Saclay, Gif sur Yvette, France
- Service de Biologie Intégrative et Génétique Moléculaire, iBiTec-S, FRE3377 CEA-CNRS-Université Paris-Sud, CEA-Saclay, Gif sur Yvette, France
| | - Stéphanie Devineau
- NIMBE, CEA/DSM/IRAMIS et UMR3685 CNRS, CEA-Saclay, Gif sur Yvette, France
| | - Jean Christophe Aude
- Service de Biologie Intégrative et Génétique Moléculaire, iBiTec-S, FRE3377 CEA-CNRS-Université Paris-Sud, CEA-Saclay, Gif sur Yvette, France
| | - Yves Boulard
- Service de Bioénergétique, Biologie Structurale et Mécanismes, iBiTec-S, UMR 9198 CEA-CNRS-Université Paris-Sud, CEA-Saclay, Gif sur Yvette, France
| | - Hélène Pasquier
- Laboratoire de Chimie Physique, UMR 8000, CNRS-Université Paris-Sud, Orsay, France
| | - Jean Labarre
- Service de Biologie Intégrative et Génétique Moléculaire, iBiTec-S, FRE3377 CEA-CNRS-Université Paris-Sud, CEA-Saclay, Gif sur Yvette, France
| | - Serge Pin
- NIMBE, CEA/DSM/IRAMIS et UMR3685 CNRS, CEA-Saclay, Gif sur Yvette, France
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26
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Mild and cost-effective green fluorescent protein purification employing small synthetic ligands. J Chromatogr A 2015; 1418:83-93. [DOI: 10.1016/j.chroma.2015.09.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 09/09/2015] [Accepted: 09/12/2015] [Indexed: 11/24/2022]
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27
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Li Y, Liu Y, Gao T, Zhang B, Song Y, Terrell JL, Barber N, Bentley WE, Takeuchi I, Payne GF, Wang Q. Self-assembly with orthogonal-imposed stimuli to impart structure and confer magnetic function to electrodeposited hydrogels. ACS APPLIED MATERIALS & INTERFACES 2015; 7:10587-10598. [PMID: 25923335 DOI: 10.1021/acsami.5b02339] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A magnetic nanocomposite film with the capability of reversibly collecting functionalized magnetic particles was fabricated by simultaneously imposing two orthogonal stimuli (electrical and magnetic). We demonstrate that cathodic codeposition of chitosan and Fe3O4 nanoparticles while simultaneously applying a magnetic field during codeposition can (i) organize structure, (ii) confer magnetic properties, and (iii) yield magnetic films that can perform reversible collection/assembly functions. The magnetic field triggered the self-assembly of Fe3O4 nanoparticles into hierarchical "chains" and "fibers" in the chitosan film. For controlled magnetic properties, the Fe3O4-chitosan film was electrodeposited in the presence of various strength magnetic fields and different deposition times. The magnetic properties of the resulting films should enable broad applications in complex devices. As a proof of concept, we demonstrate the reversible capture and release of green fluorescent protein (EGFP)-conjugated magnetic microparticles by the magnetic chitosan film. Moreover, antibody-functionalized magnetic microparticles were applied to capture cells from a sample, and these cells were collected, analyzed, and released by the magnetic chitosan film, paving the way for applications such as reusable biosensor interfaces (e.g., for pathogen detection). To our knowledge, this is the first report to apply a magnetic field during the electrodeposition of a hydrogel to generate magnetic soft matter. Importantly, the simple, rapid, and reagentless fabrication methodologies demonstrated here are valuable features for creating a magnetic device interface.
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28
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Wang J, He L, Chen D, Pi Y, Zhou W, Xiong X, Ren Y, Lai Y, Hua Z. Quantitative analysis of annexin V-membrane interaction by flow cytometry. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2015; 44:325-36. [PMID: 25921613 DOI: 10.1007/s00249-015-1026-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 02/03/2015] [Accepted: 04/08/2015] [Indexed: 01/12/2023]
Abstract
We constructed a green fluorescent phosphatidylserine (PS)-binding probe, which was generated by fusing enhanced green fluorescent protein (EGFP) to the C terminus of human annexin V (anxV). With this probe, we investigated anxV-membrane interaction under different calcium and anxV-EGFP concentrations through flow cytometry (FCM). A mathematical description of the binding characteristics is proposed and validated to quantify the relationship concerning the relative concentration of membrane-bound anxV (B), calcium concentration ([C]), and protein concentration ([P]). Further analyses reveal that [Formula: see text] is linear with [Formula: see text] or [Formula: see text] when [P] and [C] are fixed, respectively, which indicates that the anxV-membrane binding reaction may involve sequential multiple steps. Our study provides a reference for application of anxV in apoptosis detection. The mathematical expression facilitates exploration of the possible interactions between calcium, anxV, and membrane. The corresponding mathematical analysis strengthens the interpretation of the interaction data.
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Affiliation(s)
- Jie Wang
- The State Key Laboratory of Pharmaceutical Biotechnology, Room B211, College of Life Sciences, School of Stomatology and Affiliated Stomatological Hospital, Nanjing University, 163 Xianlin Road, 210046, Nanjing, People's Republic of China
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29
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Zhang C, Fredericks D, Longford D, Campi E, Sawford T, Hearn MTW. Changed loading conditions and lysate composition improve the purity of tagged recombinant proteins with tacn-based IMAC adsorbents. Biotechnol J 2014; 10:480-9. [PMID: 25303209 DOI: 10.1002/biot.201400463] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 08/29/2014] [Accepted: 10/08/2014] [Indexed: 11/10/2022]
Abstract
These investigations were designed to improve capture efficiency and selectivity in the immobilized metal ion affinity chromatographic (IMAC) purification of tagged recombinant proteins expressed in Escherichia coli cells, utilizing an alternative and novel class of immobilized metal binding ligands. The impact of loading conditions and lysate composition on the IMAC purification of NT1A- or His6 -tagged green fluorescent protein (GFP), using the ligands 1,4,7-triazacyclononane (tacn) and bis(1,4,7-triazacyclononyl)propane (dtnp), charged with Cu(2+) ions, has thus been explored. These findings were compared to the performance of a commercial adsorbent, IMAC Sepharose™ 6 FF, similarly charged with Cu(2+) ions. With the same loading, wash and elution protocols, the tacn- and dtnp-derived adsorbents showed higher selectivity in terms of removal of E. coli host cell proteins than the commercial adsorbent, while low molecular weight components in the crude lysate had a higher impact on the binding capacities of tacn- and dtnp-derived adsorbents. This effect of lysate composition could be reduced through osmotic shock treatment of the E. coli cells prior to lysis. Additionally, the protein-binding capacities of the tacn-based resins were enhanced by increasing their ligand densities. Because both the tacn- and the dtnp-derived IMAC adsorbents exhibit very high metal ion stability constants, under the chromatographic conditions examined, they could be used several times without re-charging with Cu(2+) ions. The results of these studies thus expand the general application scope of tacn-based IMAC resins for use in the capture and purification of tagged recombinant proteins.
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Affiliation(s)
- Chunfang Zhang
- Centre for Green Chemistry, School of Chemistry, Monash University, Clayton, Victoria, Australia
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30
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Stone OJ, Biette KM, Murphy PJM. Semi-automated hydrophobic interaction chromatography column scouting used in the two-step purification of recombinant green fluorescent protein. PLoS One 2014; 9:e108611. [PMID: 25254496 PMCID: PMC4177899 DOI: 10.1371/journal.pone.0108611] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 09/02/2014] [Indexed: 11/26/2022] Open
Abstract
Background Hydrophobic interaction chromatography (HIC) most commonly requires experimental determination (i.e., scouting) in order to select an optimal chromatographic medium for purifying a given target protein. Neither a two-step purification of untagged green fluorescent protein (GFP) from crude bacterial lysate using sequential HIC and size exclusion chromatography (SEC), nor HIC column scouting elution profiles of GFP, have been previously reported. Methods and Results Bacterial lysate expressing recombinant GFP was sequentially adsorbed to commercially available HIC columns containing butyl, octyl, and phenyl-based HIC ligands coupled to matrices of varying bead size. The lysate was fractionated using a linear ammonium phosphate salt gradient at constant pH. Collected HIC eluate fractions containing retained GFP were then pooled and further purified using high-resolution preparative SEC. Significant differences in presumptive GFP elution profiles were observed using in-line absorption spectrophotometry (A395) and post-run fluorimetry. SDS-PAGE and western blot demonstrated that fluorometric detection was the more accurate indicator of GFP elution in both HIC and SEC purification steps. Comparison of composite HIC column scouting data indicated that a phenyl ligand coupled to a 34 µm matrix produced the highest degree of target protein capture and separation. Conclusions Conducting two-step protein purification using the preferred HIC medium followed by SEC resulted in a final, concentrated product with >98% protein purity. In-line absorbance spectrophotometry was not as precise of an indicator of GFP elution as post-run fluorimetry. These findings demonstrate the importance of utilizing a combination of detection methods when evaluating purification strategies. GFP is a well-characterized model protein, used heavily in educational settings and by researchers with limited protein purification experience, and the data and strategies presented here may aid in development other of HIC-compatible protein purification schemes.
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Affiliation(s)
- Orrin J. Stone
- The Interdisciplinary Health Sciences Research Laboratory, Colleges of Nursing and Science & Engineering, Seattle University, Seattle, Washington, United States of America
| | - Kelly M. Biette
- The Interdisciplinary Health Sciences Research Laboratory, Colleges of Nursing and Science & Engineering, Seattle University, Seattle, Washington, United States of America
| | - Patrick J. M. Murphy
- The Interdisciplinary Health Sciences Research Laboratory, Colleges of Nursing and Science & Engineering, Seattle University, Seattle, Washington, United States of America
- * E-mail:
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Noor SSM, Tey BT, Tan WS, Ling TC, Ramanan RN, Ooi CW. PURIFICATION OF RECOMBINANT GREEN FLUORESCENT PROTEIN FROM ESCHERICHIA COLI USING HYDROPHOBIC INTERACTION CHROMATOGRAPHY. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2013.825847] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Siti Sarah Mohd. Noor
- a Institute of Bioscience , Universiti Putra Malaysia , Selangor Darul Ehsan , Malaysia
| | - Beng Ti Tey
- b Chemical Engineering Discipline, School of Engineering , Monash University Malaysia, Sunway Campus , Selangor , Malaysia
| | - Wen Siang Tan
- a Institute of Bioscience , Universiti Putra Malaysia , Selangor Darul Ehsan , Malaysia
- c Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences , Universiti Putra Malaysia , Selangor Darul Ehsan , Malaysia
| | - Tau Chuan Ling
- d Faculty of Science, Institute of Biological Sciences , University of Malaya , Kuala Lumpur , Malaysia
| | | | - Chien Wei Ooi
- b Chemical Engineering Discipline, School of Engineering , Monash University Malaysia, Sunway Campus , Selangor , Malaysia
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Warden-Rothman R, Caturegli I, Popik V, Tsourkas A. Sortase-tag expressed protein ligation: combining protein purification and site-specific bioconjugation into a single step. Anal Chem 2013; 85:11090-7. [PMID: 24111659 PMCID: PMC3843242 DOI: 10.1021/ac402871k] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Efficient labeling of protein-based targeting ligands with various cargos (drugs, imaging agents, nanoparticles, etc.) is essential to the fields of molecular imaging and targeted therapeutics. Many common bioconjugation techniques, however, are inefficient, nonstoichiometric, not site-specific, and/or incompatible with certain classes of protein scaffolds. Additionally, these techniques can result in a mixture of conjugated and unconjugated products, which are often difficult to separate. In this study, a bacterial sortase enzyme was utilized to condense targeting ligand purification and site-specific conjugation at the C-terminus into a single step. A model was produced to determine optimal reaction conditions for high conjugate purity and efficient utilization of cargo. As proof-of-principle, the sortase-tag expressed protein ligation (STEPL) technique was used to generate tumor-specific affinity ligands with fluorescent labels and/or azide modifications at high purity (>95%) such that it was not necessary to remove unconjugated impurities. Click chemistry was then used for the highly efficient and site-specific attachment of the azide-modified targeting ligands onto nanoparticles.
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Affiliation(s)
| | - Ilaria Caturegli
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104
| | - Vladimir Popik
- Department of Chemistry, University of Georgia, Athens, GA 30602
| | - Andrew Tsourkas
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104
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33
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Nishimura H, Ritchie K, Kasai RS, Goto M, Morone N, Sugimura H, Tanaka K, Sase I, Yoshimura A, Nakano Y, Fujiwara TK, Kusumi A. Biocompatible fluorescent silicon nanocrystals for single-molecule tracking and fluorescence imaging. ACTA ACUST UNITED AC 2013; 202:967-83. [PMID: 24043702 PMCID: PMC3776351 DOI: 10.1083/jcb.201301053] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Fluorescence microscopy is used extensively in cell-biological and biomedical research, but it is often plagued by three major problems with the presently available fluorescent probes: photobleaching, blinking, and large size. We have addressed these problems, with special attention to single-molecule imaging, by developing biocompatible, red-emitting silicon nanocrystals (SiNCs) with a 4.1-nm hydrodynamic diameter. Methods for producing SiNCs by simple chemical etching, for hydrophilically coating them, and for conjugating them to biomolecules precisely at a 1:1 ratio have been developed. Single SiNCs neither blinked nor photobleached during a 300-min overall period observed at video rate. Single receptor molecules in the plasma membrane of living cells (using transferrin receptor) were imaged for ≥10 times longer than with other probes, making it possible for the first time to observe the internalization process of receptor molecules at the single-molecule level. Spatial variations of molecular diffusivity in the scale of 1-2 µm, i.e., a higher level of domain mosaicism in the plasma membrane, were revealed.
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Affiliation(s)
- Hirohito Nishimura
- Institute for Integrated Cell-Material Sciences, 2 Institute for Frontier Medical Sciences, and 3 Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501, Japan
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34
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Label-free fluorescent detection of thrombin activity based on a recombinant enhanced green fluorescence protein and nickel ions immobilized nitrilotriacetic acid-coated magnetic nanoparticles. Talanta 2013; 116:468-73. [DOI: 10.1016/j.talanta.2013.07.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2013] [Revised: 07/02/2013] [Accepted: 07/09/2013] [Indexed: 11/20/2022]
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35
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Knez K, Noppe W, Geukens N, Janssen KPF, Spasic D, Heyligen J, Vriens K, Thevissen K, Cammue BPA, Petrenko V, Ulens C, Deckmyn H, Lammertyn J. Affinity Comparison of p3 and p8 Peptide Displaying Bacteriophages Using Surface Plasmon Resonance. Anal Chem 2013; 85:10075-82. [DOI: 10.1021/ac402192k] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Karel Knez
- BIOSYST-MeBioS, KU Leuven, Willem De Croylaan 42, P.O. Box 2428, B-3001 Leuven, Belgium
| | - Wim Noppe
- IRF
Life Siences, KU Leuven Kulak, E. Sabbelaan 53, B-8500 Kortrijk, Belgium
| | - Nick Geukens
- PharmAbs, The KU Leuven Antibody Center, O&N II, Herestraat 49, P.O. Box 824, B-3000 Leuven, Belgium
| | - Kris P. F. Janssen
- BIOSYST-MeBioS, KU Leuven, Willem De Croylaan 42, P.O. Box 2428, B-3001 Leuven, Belgium
| | - Dragana Spasic
- BIOSYST-MeBioS, KU Leuven, Willem De Croylaan 42, P.O. Box 2428, B-3001 Leuven, Belgium
| | - Jeroen Heyligen
- BIOSYST-MeBioS, KU Leuven, Willem De Croylaan 42, P.O. Box 2428, B-3001 Leuven, Belgium
| | - Kim Vriens
- Centre
for Microbial and Plant Genetics, KU Leuven, Kasteelpark Arenberg 20, P.O. 2460, B-3001 Heverlee, Belgium
| | - Karin Thevissen
- Centre
for Microbial and Plant Genetics, KU Leuven, Kasteelpark Arenberg 20, P.O. 2460, B-3001 Heverlee, Belgium
| | - Bruno P. A. Cammue
- Centre
for Microbial and Plant Genetics, KU Leuven, Kasteelpark Arenberg 20, P.O. 2460, B-3001 Heverlee, Belgium
| | - Valery Petrenko
- Auburn University, College of Veterinary Medicine,
Department of Pathobiology, 269 Greene Hall, Auburn, Alabama 36849-5519, United States
| | - Chris Ulens
- Laboratory for Structural Neurobiology, KU Leuven, O&N I, Herestraat 49, P.O. Box 601, B-3000 Leuven, Belgium
| | - Hans Deckmyn
- IRF
Life Siences, KU Leuven Kulak, E. Sabbelaan 53, B-8500 Kortrijk, Belgium
- PharmAbs, The KU Leuven Antibody Center, O&N II, Herestraat 49, P.O. Box 824, B-3000 Leuven, Belgium
| | - Jeroen Lammertyn
- BIOSYST-MeBioS, KU Leuven, Willem De Croylaan 42, P.O. Box 2428, B-3001 Leuven, Belgium
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36
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Vuojola J, Syrjänpää M, Lamminmäki U, Soukka T. Genetically Encoded Protease Substrate Based on Lanthanide-Binding Peptide for Time-Gated Fluorescence Detection. Anal Chem 2013; 85:1367-73. [DOI: 10.1021/ac302030q] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Johanna Vuojola
- Department of Biotechnology, University of Turku, Tykistökatu 6A, FI-20520 Turku, Finland
| | - Markku Syrjänpää
- Department of Biotechnology, University of Turku, Tykistökatu 6A, FI-20520 Turku, Finland
| | - Urpo Lamminmäki
- Department of Biotechnology, University of Turku, Tykistökatu 6A, FI-20520 Turku, Finland
| | - Tero Soukka
- Department of Biotechnology, University of Turku, Tykistökatu 6A, FI-20520 Turku, Finland
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37
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Hussain M, Lockney D, Wang R, Gera N, Rao BM. Avidity-mediated virus separation using a hyperthermophilic affinity ligand. Biotechnol Prog 2013; 29:237-46. [PMID: 23125177 DOI: 10.1002/btpr.1655] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 10/22/2012] [Indexed: 12/14/2022]
Abstract
Immunoaffinity separation of large multivalent species such as viruses is limited by the stringent elution conditions necessary to overcome their strong and highly avid interaction with immobilized affinity ligands on the capture surface. Here we present an alternate strategy that harnesses the avidity effect to overcome this limitation. Red clover necrotic mosaic virus (RCNMV), a plant virus relevant to drug delivery applications, was chosen as a model target for this study. An RCNMV binding protein (RBP) with modest binding affinity (K(D) ~100 nM) was generated through mutagenesis of the Sso7d protein from Sulfolobus solfataricus and used as the affinity ligand. In our separation scheme, RCNMV is captured by a highly avid interaction with RBP immobilized on a nickel surface through a hexahistidine (6xHis) tag. Subsequently, disruption of the multivalent interaction and release of RCNMV is achieved by elution of RBP from the nickel surface. Finally, RCNMV is separated from RBP by exploiting the large difference in their molecular weights (~8 MDa vs. ~10 kDa). Our strategy not only eliminates the need for harsh elution conditions, but also bypasses chemical conjugation of the affinity ligand to the capture surface. Stable non-antibody affinity ligands to a wide spectrum of targets can be generated through mutagenesis of Sso7d and other hyperthermophilic proteins. Therefore, our approach may be broadly relevant to cases where capture of large multivalent species from complex mixtures and subsequent release without the use of harsh elution conditions is necessary.
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Affiliation(s)
- Mahmud Hussain
- Dept. of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, USA
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38
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Brown P, Khan AM, Armstrong JPK, Perriman AW, Butts CP, Eastoe J. Magnetizing DNA and proteins using responsive surfactants. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:6244-6247. [PMID: 22945776 DOI: 10.1002/adma.201202685] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Indexed: 06/01/2023]
Abstract
DNA chains and their movement in solvent may now be controlled simply by surfactant binding and the switching "on" and "off" of a magnetic field adding a new paradigm to the study and control, condensation and manipulation of DNA (and other biomolecules). Such control is essential for biotechnological applications such as transfection and the regulation of gene suppression, as well as in materials science concerning soft molecular self-assemblies.
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Affiliation(s)
- Paul Brown
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
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39
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Wu JY, Chen CI, Chen CM, Lin CC, Kan SC, Shieh CJ, Liu YC. Cell disruption enhanced the pure EGFP recovery from an EGFP-intein-surface protein production system in recombinant E. coli. Biochem Eng J 2012. [DOI: 10.1016/j.bej.2012.06.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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40
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Lombardi A, Gianese G, Arcangeli C, Galeffi P, Sperandei M. Bacterial cytoplasm production of an EGFP-labeled single-chain Fv antibody specific for the HER2 human receptor. J Biomol Struct Dyn 2012; 29:425-39. [PMID: 22066531 DOI: 10.1080/07391102.2011.10507396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The human epidermal growth factor receptor 2 (HER2) is the main diagnostic marker of breast and ovary cancers. Here, to obtain a rapid and sensitive immunodiagnostic tool a single-chain antibody (scFv800E6) specific for the HER2 was fused to the N-terminus of the enhanced green fluorescent protein (EGFP) by a flexible linker. The soluble production of the novel scFv800E6-EGFP protein in the cytoplasm of Escherichia coli was investigated at different induction temperatures (25, 30 and 37°C); the intrinsic fluorescent properties and the binding activity to HER2 positive tumour cells of the fusion protein were analysed. Western blotting and fluorescence analysis of SDS-PAGE revealed the presence of two scFv800E6-EGFP forms, with different mobility and optical properties, their ratio depending on the induction temperature. The fluorescent form maintained the optical fluorescence properties of EGFP and exhibited a binding activity to the HER2-expressing cells comparable to that of the non-fused scFv800E6. In addition, to provide an insight into the effect of the induction temperature on the molecular structure, the folding of the fusion protein was assessed at atomic level by performing molecular dynamics simulations of the homology-derived model of scFv800E6-EGFP at 300 K and 310 K. The comparison of the data collected at these two temperatures revealed that the higher temperature affects specific structural elements. To improve the production of the soluble and functional scFv800E6-EGFP protein, "in silico" results could be utilised for ad hoc design of the molecular structure.
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Affiliation(s)
- Alessio Lombardi
- Institute of Biology and Agrarian Biotechnology (IBBA), National Research Council, via Bassini 15, 20133 Milan, Italy
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41
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Lyons RE, Elvin CM, Taylor K, Lekieffre N, Ramshaw JA. Purification of recombinant protein by cold-coacervation of fusion constructs incorporating resilin-inspired polypeptides. Biotechnol Bioeng 2012; 109:2947-54. [DOI: 10.1002/bit.24565] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Revised: 05/10/2012] [Accepted: 05/15/2012] [Indexed: 11/10/2022]
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42
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Xu Y, Melia TJ, Toomre DK. Using light to see and control membrane traffic. Curr Opin Chem Biol 2011; 15:822-30. [PMID: 22079055 DOI: 10.1016/j.cbpa.2011.10.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 10/01/2011] [Accepted: 10/17/2011] [Indexed: 01/13/2023]
Abstract
Cellular compartmentalization into discrete organelles is maintained by membrane trafficking including vesiculation and tubulation. Recent advances in superresolution imaging have begun to bring these small and dynamic events into focus. Most nanoscopes exploit, and are limited by, switching dyes ON and OFF. Using ground state depletion to switch dyes into long-lived dark states can exploit specific photophysical properties of dyes, such as redox potential or pK(a), and expand the repertoire of nanoscopy probes for multicolor imaging. Seeing is not enough, and new technologies based on homodimerization, heterodimerization and selective release can manipulate membrane trafficking in pulse-chase and light-controlled ways. Herein we highlight the utility and promise of these strategies and discuss their current limitations.
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Affiliation(s)
- Yingke Xu
- Department of Cell Biology, Yale University School of Medicine, New Haven, CT 06520-8002, USA
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43
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Serdyuk IN, Deryusheva EI. Biophysics of single molecules. Biophysics (Nagoya-shi) 2011. [DOI: 10.1134/s0006350911050186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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44
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Youell J, Fordham D, Firman K. Production and single-step purification of EGFP and a biotinylated version of the Human Rhinovirus 14 3C protease. Protein Expr Purif 2011; 79:258-62. [PMID: 21605680 DOI: 10.1016/j.pep.2011.05.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 05/04/2011] [Accepted: 05/05/2011] [Indexed: 11/25/2022]
Abstract
The fluorescent reporter enhanced Green Fluorescent Protein (EGFP) has been used for assaying a wide range of biological activities ranging from gene expression, or localization of target proteins through to intermolecular interactions. However, over-production of this protein in Escherichia coli has resulted in the presence of inclusion bodies, which complicates recovery of the protein in significant quantities. In this paper, we describe a single-step method for isolating the protein from a Glutathione-S-Transferase (GST) fusion protein, release of the EGFP protein from the fusion was demonstrated using a biotinylated variant of Human Rhinovirus 14 3C protease that we have also constructed. We also suggest the potential uses of the biotinylated protease for bionanotechnology and synthetic biology.
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Affiliation(s)
- James Youell
- IBBS Biophysics Laboratories, School of Biological Sciences, University of Portsmouth, King Henry Building, King Henry I Street, Portsmouth PO1 2DY, Hampshire, United Kingdom.
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45
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A sensitive diagnostic assay of rheumatoid arthritis using three-dimensional ZnO nanorod structure. Biosens Bioelectron 2011; 28:378-85. [DOI: 10.1016/j.bios.2011.07.052] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Revised: 07/18/2011] [Accepted: 07/21/2011] [Indexed: 11/20/2022]
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46
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Liu Z, Li M, Yang X, Yin M, Ren J, Qu X. The use of multifunctional magnetic mesoporous core/shell heteronanostructures in a biomolecule separation system. Biomaterials 2011; 32:4683-90. [DOI: 10.1016/j.biomaterials.2011.03.038] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Accepted: 03/04/2011] [Indexed: 10/18/2022]
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47
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Widakowich G, Zhang C, Harris S, Mitri K, Powers G, Troung KS, Hearn MTW. Effects of IMAC specific peptide tags on the stability of recombinant green fluorescent protein. Biotechnol Prog 2011; 27:1048-53. [DOI: 10.1002/btpr.546] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2010] [Revised: 07/21/2010] [Indexed: 11/09/2022]
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48
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Ma Y, Rajendran P, Blum C, Cesa Y, Gartmann N, Brühwiler D, Subramaniam V. Microspectroscopic analysis of green fluorescent proteins infiltrated into mesoporous silica nanochannels. J Colloid Interface Sci 2011; 356:123-30. [DOI: 10.1016/j.jcis.2010.12.082] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Revised: 12/27/2010] [Accepted: 12/27/2010] [Indexed: 11/29/2022]
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49
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Chew FN, Tan WS, Ling TC, Tey BT. Optimization of a native gel electrophoretic process for the purification of intracellular green fluorescent protein from intact Escherichia coli cells. Process Biochem 2011. [DOI: 10.1016/j.procbio.2010.07.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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50
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Expressed protein ligation for the preparation of fusion proteins with cell penetrating peptides for endotoxin removal and intracellular delivery. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:2249-57. [PMID: 20170629 DOI: 10.1016/j.bbamem.2010.02.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Revised: 01/29/2010] [Accepted: 02/03/2010] [Indexed: 01/27/2023]
Abstract
Expressed protein ligation (EPL) is a useful method for the native chemical ligation of proteins with other proteins or peptides. This study assessed the practicability of EPL in the preparation of fusion proteins of enhanced green fluorescent protein (EGFP) with chemically synthesized cell-penetrating peptides (CPPs) for intracellular delivery. Using intein-mediated purification with an affinity chitin-binding tag (IMPACT) system, the thioester of EGFP (EGFP-SR) was prepared. Optimization of the ligation of EGFP-SR with arginine 12-mer (R12) produced the fusion protein in high yield. The EPL procedure also allows the preparation of EGFP-R12 containing a low level of endotoxin (ET), via the satisfactory ET removal of EGFP-SR prior to ligation with the R12 peptide. Fusion proteins of EGFP with R12 and the d-isomer of R12 prepared by EPL showed similar levels of cellular uptake compared to the fusion protein directly expressed in Escherichiacoli.
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