1
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Sarkar D, Galleano I, Heusser SA, Ou SY, Uzun GR, Khoo KK, van der Heden van Noort GJ, Harrison JS, Pless SA. Protein semisynthesis underscores the role of a conserved lysine in activation and desensitization of acid-sensing ion channels. Cell Chem Biol 2023:S2451-9456(23)00430-0. [PMID: 38113885 DOI: 10.1016/j.chembiol.2023.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 07/21/2023] [Accepted: 11/28/2023] [Indexed: 12/21/2023]
Abstract
Acid-sensing ion channels (ASICs) are trimeric ion channels that open a cation-conducting pore in response to proton binding. Excessive ASIC activation during prolonged acidosis in conditions such as inflammation and ischemia is linked to pain and stroke. A conserved lysine in the extracellular domain (Lys211 in mASIC1a) is suggested to play a key role in ASIC function. However, the precise contributions are difficult to dissect with conventional mutagenesis, as replacement of Lys211 with naturally occurring amino acids invariably changes multiple physico-chemical parameters. Here, we study the contribution of Lys211 to mASIC1a function using tandem protein trans-splicing (tPTS) to incorporate non-canonical lysine analogs. We conduct optimization efforts to improve splicing and functionally interrogate semisynthetic mASIC1a. In combination with molecular modeling, we show that Lys211 charge and side-chain length are crucial to activation and desensitization, thus emphasizing that tPTS can enable atomic-scale interrogations of membrane proteins in live cells.
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Affiliation(s)
- Debayan Sarkar
- Department of Drug Design and Pharmacology, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Iacopo Galleano
- Department of Drug Design and Pharmacology, University of Copenhagen, 2100 Copenhagen, Denmark; Department of Cell and Chemical Biology, Leiden University Medical Centre, Leiden, the Netherlands
| | | | - Sofie Yuewei Ou
- Department of Drug Design and Pharmacology, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Gül Refika Uzun
- Department of Drug Design and Pharmacology, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Keith K Khoo
- Department of Drug Design and Pharmacology, University of Copenhagen, 2100 Copenhagen, Denmark
| | | | | | - Stephan Alexander Pless
- Department of Drug Design and Pharmacology, University of Copenhagen, 2100 Copenhagen, Denmark.
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2
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Wood DW, Belfort M, Lennon CW. Inteins-mechanism of protein splicing, emerging regulatory roles, and applications in protein engineering. Front Microbiol 2023; 14:1305848. [PMID: 38029209 PMCID: PMC10663303 DOI: 10.3389/fmicb.2023.1305848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023] Open
Abstract
Protein splicing is a posttranslational process in which an intein segment excises itself from two flanking peptides, referred to as exteins. In the native context, protein splicing results in two separate protein products coupled to the activation of the intein-containing host protein. Inteins are generally described as either full-length inteins, mini-inteins or split inteins, which are differentiated by their genetic structure and features. Inteins can also be divided into three classes based on their splicing mechanisms, which differ in the location of conserved residues that mediate the splicing pathway. Although inteins were once thought to be selfish genetic elements, recent evidence suggests that inteins may confer a genetic advantage to their host cells through posttranslational regulation of their host proteins. Finally, the ability of modified inteins to splice and cleave their fused exteins has enabled many new applications in protein science and synthetic biology. In this review, we briefly cover the mechanisms of protein splicing, evidence for some inteins as environmental sensors, and intein-based applications in protein engineering.
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Affiliation(s)
- David W. Wood
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, United States
| | - Marlene Belfort
- Department of Biological Sciences and RNA Institute, University at Albany, Albany, NY, United States
| | - Christopher W. Lennon
- Department of Biological Sciences, Murray State University, Murray, KY, United States
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3
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Esposito F, Lyubenova H, Tornabene P, Auricchio S, Iuliano A, Nusco E, Merlin S, Olgasi C, Manni G, Gargaro M, Fallarino F, Follenzi A, Auricchio A. Liver gene therapy with intein-mediated F8 trans-splicing corrects mouse haemophilia A. EMBO Mol Med 2022; 14:e15199. [PMID: 35491676 PMCID: PMC9174883 DOI: 10.15252/emmm.202115199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 04/01/2022] [Accepted: 04/11/2022] [Indexed: 11/09/2022] Open
Abstract
Liver gene therapy with adeno‐associated viral (AAV) vectors is under clinical investigation for haemophilia A (HemA), the most common inherited X‐linked bleeding disorder. Major limitations are the large size of the F8 transgene, which makes packaging in a single AAV vector a challenge, as well as the development of circulating anti‐F8 antibodies which neutralise F8 activity. Taking advantage of split‐intein‐mediated protein trans‐splicing, we divided the coding sequence of the large and highly secreted F8‐N6 variant in two separate AAV‐intein vectors whose co‐administration to HemA mice results in the expression of therapeutic levels of F8 over time. This occurred without eliciting circulating anti‐F8 antibodies unlike animals treated with the single oversized AAV‐F8 vector under clinical development. Therefore, liver gene therapy with AAV‐F8‐N6 intein should be considered as a potential therapeutic strategy for HemA.
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Affiliation(s)
- Federica Esposito
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | | | | | - Stefano Auricchio
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | - Antonella Iuliano
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | - Edoardo Nusco
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | - Simone Merlin
- Department of Health Sciences, University of Piemonte Orientale "Amedeo Avogadro", Novara, Italy
| | - Cristina Olgasi
- Department of Health Sciences, University of Piemonte Orientale "Amedeo Avogadro", Novara, Italy
| | - Giorgia Manni
- Department of Medicine and Surgery, University of Perugia, Perugia, Italy
| | - Marco Gargaro
- Department of Medicine and Surgery, University of Perugia, Perugia, Italy
| | | | - Antonia Follenzi
- Department of Health Sciences, University of Piemonte Orientale "Amedeo Avogadro", Novara, Italy
| | - Alberto Auricchio
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy.,Medical Genetics, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
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4
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Tornabene P, Trapani I, Centrulo M, Marrocco E, Minopoli R, Lupo M, Iodice C, Gesualdo C, Simonelli F, Surace EM, Auricchio A. Inclusion of a degron reduces levelsof undesired inteins after AAV-mediated protein trans-splicing in the retina. Mol Ther Methods Clin Dev 2021; 23:448-459. [PMID: 34786437 PMCID: PMC8571531 DOI: 10.1016/j.omtm.2021.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/01/2021] [Accepted: 10/11/2021] [Indexed: 12/02/2022]
Abstract
Split intein-mediated protein trans-splicing expands AAV transfer capacity, thus overcoming the limited AAV cargo. However, non-mammalian inteins persist as trans-splicing by-products, and this could raise safety concerns for AAV intein clinical applications. In this study, we tested the ability of several degrons to selectively decrease levels of inteins after protein trans-splicing and found that a version of E. coli dihydrofolate reductase, which we have shortened to better fit into the AAV vector, is the most effective. We show that subretinal administration of AAV intein armed with this short degron is both safe and effective in a mouse model of Stargardt disease (STGD1), which is the most common form of inherited macular degeneration in humans. This supports the use of optimized AAV intein for gene therapy of both STGD1 and other conditions that require transfer of large genes.
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Affiliation(s)
- Patrizia Tornabene
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli 80078, Italy
| | - Ivana Trapani
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli 80078, Italy
- Medical Genetics, Department of Translational Medicine, Federico II University, Naples 80131, Italy
| | - Miriam Centrulo
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli 80078, Italy
| | - Elena Marrocco
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli 80078, Italy
| | - Renato Minopoli
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli 80078, Italy
| | - Mariangela Lupo
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli 80078, Italy
| | - Carolina Iodice
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli 80078, Italy
| | - Carlo Gesualdo
- Eye Clinic, Multidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania L. Vanvitelli, Naples 80131, Italy
| | - Francesca Simonelli
- Eye Clinic, Multidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania L. Vanvitelli, Naples 80131, Italy
| | - Enrico M. Surace
- Medical Genetics, Department of Translational Medicine, Federico II University, Naples 80131, Italy
| | - Alberto Auricchio
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli 80078, Italy
- Medical Genetics, Department of Advanced Biomedicine, Federico II University, Naples 80131, Italy
- Correspondence: Alberto Auricchio, MD, Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli 80078, Italy; Medical Genetics, Department of Translational Medicine, Federico II University, Naples 80131, Italy.
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5
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Oh H, Jung Y, Moon S, Hwang J, Ban C, Chung J, Chung WJ, Kweon DH. Development of End-Spliced Dimeric Nanodiscs for the Improved Virucidal Activity of a Nanoperforator. ACS Appl Mater Interfaces 2021; 13:36757-36768. [PMID: 34319090 DOI: 10.1021/acsami.1c06364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Lipid-bilayer nanodiscs (NDs) wrapped in membrane scaffold proteins (MSPs) have primarily been used to study membrane proteins of interest in a physiological environment. Recently, NDs have been employed in broader applications including drug delivery, cancer immunotherapy, bio-imaging, and therapeutic virucides. Here, we developed a method to synthesize a dimeric nanodisc, whose MSPs are circularly end-spliced, with long-term thermal stability and resistance to aggregation. The end-spliced nanodiscs (esNDs) were assembled using MSPs that were self-circularized inside the cytoplasm ofEscherichia colivia highly efficient protein trans-splicing. The esNDs demonstrated a consistent size and 4-5-fold higher stability against heat and aggregation than conventional NDs. Moreover, cysteine residues on trans-spliced circularized MSPs allowed us to modulate the formation of either monomeric nanodiscs (essNDs) or dimeric nanodiscs (esdNDs) by controlling the oxidation/reduction conditions and lipid-to-protein ratios. When the esdNDs were used to prepare an antiviral nanoperforator that induced the disruption of the viral membrane upon contact, antiviral activity was dramatically increased, suggesting that the dimerization of nanodiscs led to cooperativity between linked nanodiscs. We expect that controllable structures, long-term stability, and aggregation resistance of esNDs will aid the development of novel versatile membrane-mimetic nanomaterials with flexible designs and improved therapeutic efficacy.
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Affiliation(s)
- Hyunseok Oh
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Younghun Jung
- Institute of Biomolecular Control, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Seokoh Moon
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Jaehyeon Hwang
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Choongjin Ban
- Biomedical Institute for Convergence, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Department of Environmental Horticulture, University of Seoul, Seoul 02504, Republic of Korea
| | - Jinhyo Chung
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Woo-Jae Chung
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Biomedical Institute for Convergence, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Dae-Hyuk Kweon
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Biomedical Institute for Convergence, Sungkyunkwan University, Suwon 16419, Republic of Korea
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6
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Hsu STD, Lee YTC, Mikula KM, Backlund SM, Tascón I, Goldman A, Iwaï H. Tying up the Loose Ends: A Mathematically Knotted Protein. Front Chem 2021; 9:663241. [PMID: 34109153 PMCID: PMC8182377 DOI: 10.3389/fchem.2021.663241] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 04/20/2021] [Indexed: 11/23/2022] Open
Abstract
Knots have attracted scientists in mathematics, physics, biology, and engineering. Long flexible thin strings easily knot and tangle as experienced in our daily life. Similarly, long polymer chains inevitably tend to get trapped into knots. Little is known about their formation or function in proteins despite >1,000 knotted proteins identified in nature. However, these protein knots are not mathematical knots with their backbone polypeptide chains because of their open termini, and the presence of a “knot” depends on the algorithm used to create path closure. Furthermore, it is generally not possible to control the topology of the unfolded states of proteins, therefore making it challenging to characterize functional and physicochemical properties of knotting in any polymer. Covalently linking the amino and carboxyl termini of the deeply trefoil-knotted YibK from Pseudomonas aeruginosa allowed us to create the truly backbone knotted protein by enzymatic peptide ligation. Moreover, we produced and investigated backbone cyclized YibK without any knotted structure. Thus, we could directly probe the effect of the backbone knot and the decrease in conformational entropy on protein folding. The backbone cyclization did not perturb the native structure and its cofactor binding affinity, but it substantially increased the thermal stability and reduced the aggregation propensity. The enhanced stability of a backbone knotted YibK could be mainly originated from an increased ruggedness of its free energy landscape and the destabilization of the denatured state by backbone cyclization with little contribution from a knot structure. Despite the heterogeneity in the side-chain compositions, the chemically unfolded cyclized YibK exhibited several macroscopic physico-chemical attributes that agree with theoretical predictions derived from polymer physics.
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Affiliation(s)
- Shang-Te Danny Hsu
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Yun-Tzai Cloud Lee
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Kornelia M Mikula
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Sofia M Backlund
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Igor Tascón
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Adrian Goldman
- Division of Biochemistry, Department of Biosciences, University of Helsinki, Helsinki, Finland.,Astbury Centre for Structural Molecular Biology, School of Biomedical Sciences, University of Leeds, West Yorkshire, United Kingdom
| | - Hideo Iwaï
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
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7
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Liu C, Kobashigawa Y, Yamauchi S, Fukuda N, Sato T, Masuda T, Ohtsuki S, Morioka H. Convenient method of producing cyclic single-chain Fv antibodies by split-intein-mediated protein ligation and chaperone co-expression. J Biochem 2021; 168:257-263. [PMID: 32275752 DOI: 10.1093/jb/mvaa042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 03/31/2020] [Indexed: 11/13/2022] Open
Abstract
Single-chain Fv (scFv) is a recombinant antibody in which the variable regions of the heavy chain (VH) and light chain (VL) are connected by a short flexible polypeptide linker. Compared with monoclonal antibodies, scFvs have the advantages of low-cost production using Escherichia coli and easy genetic manipulation. ScFvs are, therefore, regarded as useful modules for producing next-generation medical antibodies. The practical use of scFvs has been limited due to their aggregation propensity mediated by interchain VH-VL interactions. To overcome this problem, we recently reported a cyclic scFv whose N-terminus and C-terminus were connected by sortase A-mediated ligation. Preparation of cyclic scFv is, however, a time-consuming process. To accelerate the application study of cyclic scFv, we developed a method to produce cyclic scFv by the combined use of a protein ligation technique based on protein trans-splicing reaction (PTS) by split intein and a chaperone co-expression system. This method allows for the preparation of active cyclic scFv from the cytoplasm of E. coli. The present method was applied to the production of cyclic 73MuL9-scFv, a GA-pyridine antibody, as a kind of advanced glycation end-product. These findings are expected to evoke further application study of cyclic scFv.
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Affiliation(s)
| | | | | | | | - Takashi Sato
- Department of Analytical and Biophysical Chemistry
| | - Takeshi Masuda
- Department of Pharmaceutical Microbiology, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto 862-0973, Japan
| | - Sumio Ohtsuki
- Department of Pharmaceutical Microbiology, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto 862-0973, Japan
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8
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Kagiya G, Sato A, Ogawa R, Hatashita M, Kato M, Kubo M, Kojima F, Kawakami F, Nishimura Y, Abe N, Hyodo F. Real-time visualization of intratumoral necrosis using split-luciferase reconstitution by protein trans-splicing. Mol Ther Oncolytics 2020; 20:48-58. [PMID: 33575470 PMCID: PMC7851486 DOI: 10.1016/j.omto.2020.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 12/05/2020] [Indexed: 11/07/2022]
Abstract
Necrosis, a form of cell death, occurs not only with the development of various diseases but also with a tumor tissue response to cancer treatment. Therefore, pursuing progress for cancer therapy through induction of necrosis may be one of the most effective approaches for cancer eradication. We herein describe the development of a real-time imaging system to visualize intratumoral necrosis. The system is composed of two types of cells expressing either one of two necrosis imaging reporters that consist of a DnaE intein sequence linking to one of two split-luciferase fragments. When necrosis occurs in a tumor composed of both of the cells, the two types of leaked reporters can reconstitute the enzymatic activity as a result of protein trans-splicing and thereby emit bioluminescence in the presence of the substrate. This system, which was constructed with shrimp-derived luciferase, allowed in vitro imaging of necrosis. We further confirmed real-time imaging of intratumoral necrosis caused by physical or chemical tissue disruption, validating its application in in vivo necrosis imaging. Thus, the constructed imaging system could be a powerful tool for the optimization of the therapeutic condition for cancer therapy and for the evaluation of novel anticancer drugs targeting necrosis.
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Affiliation(s)
- Go Kagiya
- School of Allied Health Sciences, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan.,Regenerative Medicine and Cell Design Research Facility, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Ayaka Sato
- Department of Radiology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae, Kawasaki, Kanagawa 216-8511, Japan
| | - Ryohei Ogawa
- Department of Radiological Sciences, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Masanori Hatashita
- Biotechnology Division, The Wakasa Wan Energy Research Center, 64-52-1 Nagatani, Tsuruga, Fukui 914-0192, Japan
| | - Mana Kato
- Department of Radiological Services, Tokyo Women's Medical University Hospital, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan
| | - Makoto Kubo
- School of Allied Health Sciences, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan.,Regenerative Medicine and Cell Design Research Facility, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Fumiaki Kojima
- School of Allied Health Sciences, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan.,Regenerative Medicine and Cell Design Research Facility, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Fumitaka Kawakami
- School of Allied Health Sciences, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan.,Regenerative Medicine and Cell Design Research Facility, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Yukari Nishimura
- School of Allied Health Sciences, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Naoya Abe
- School of Allied Health Sciences, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Fuminori Hyodo
- Department of Radiology Frontier Science for Imaging, School of Medicine, Gifu University, 1-1 Yanagida, Gifu 501-1194, Japan
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9
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Kawase M, Fujioka M, Takahashi T. Activation of Protease and Luciferase Using Engineered Nostoc punctiforme PCC73102 DnaE Intein with Altered Split Position. Chembiochem 2020; 22:577-584. [PMID: 32969142 DOI: 10.1002/cbic.202000609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 09/17/2020] [Indexed: 12/22/2022]
Abstract
Inteins, self-catalytic enzymes, have been widely used in the field of protein engineering and chemical biology. Here, Nostoc punctiforme PCC73102 (Npu) DnaE intein was engineered to have an altered split position. An 11-residue N-intein of DnaE in which Gly and Asp were substituted for Tyr4 and Glu5, respectively, was designed, and the active C-intein variants were acquired by a GFP fluorescence-based screening. The designed N-intein and the obtained active C-intein variants were used to construct a turn-on system for enzyme activities such as human immunodeficiency 1 protease and NanoLuc luciferase. Based on the NanoLuc-intein fusion, we developed two intein pairs, each of which is capable of reacting preferentially, by interchanging the charged amino acids on N- and C-inteins. The specific splicing reactions were easily monitored and discriminated by bioluminescence resonance energy transfer (BRET).
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Affiliation(s)
- Misaki Kawase
- Faculty of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma, 376-8515, Japan
| | - Meiko Fujioka
- Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma, 376-8515, Japan
| | - Tsuyoshi Takahashi
- Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma, 376-8515, Japan
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10
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Jaakkonen A, Volkmann G, Iwaï H. An off-the-Shelf Approach for the Production of Fc Fusion Proteins by Protein Trans-Splicing towards Generating a Lectibody In Vitro. Int J Mol Sci 2020; 21:ijms21114011. [PMID: 32503354 PMCID: PMC7313076 DOI: 10.3390/ijms21114011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 05/29/2020] [Accepted: 05/31/2020] [Indexed: 12/19/2022] Open
Abstract
Monoclonal antibodies, engineered antibodies, and antibody fragments have become important biological therapeutic platforms. The IgG format with bivalent binding sites has a modular structure with different biological roles, i.e., effector and binding functions, in different domains. We demonstrated the reconstruction of an IgG-like domain structure in vitro by protein ligation using protein trans-splicing. We produced various binding domains to replace the binding domain of IgG from Escherichia coli and the Fc domain of human IgG from Brevibacillus choshinensis as split-intein fusions. We showed that in vitro protein ligation could produce various Fc-fusions at the N-terminus in vitro from the independently produced domains from different organisms. We thus propose an off-the-shelf approach for the combinatorial production of Fc fusions in vitro with several distinct binding domains, particularly from naturally occurring binding domains. Antiviral lectins from algae are known to inhibit virus entry of HIV and SARS coronavirus. We demonstrated that a lectin could be fused with the Fc-domain in vitro by protein ligation, producing an IgG-like molecule as a “lectibody”. Such an Fc-fusion could be produced in vitro by this approach, which could be an attractive method for developing potential therapeutic agents against rapidly emerging infectious diseases like SARS coronavirus without any genetic fusion and expression optimization.
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Affiliation(s)
- Anniina Jaakkonen
- Institute of Biotechnology, University of Helsinki, FI-00014 Helsinki, Finland; (A.J.); (G.V.)
- Present Address: Microbiology Unit, Finnish Food Authority, FI-00790 Helsinki, Finland
| | - Gerrit Volkmann
- Institute of Biotechnology, University of Helsinki, FI-00014 Helsinki, Finland; (A.J.); (G.V.)
| | - Hideo Iwaï
- Institute of Biotechnology, University of Helsinki, FI-00014 Helsinki, Finland; (A.J.); (G.V.)
- Correspondence: ; Tel.: +358-2941-59752
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11
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Abstract
Protein splicing domains, also called inteins, have become a powerful biotechnological tool for applications involving molecular biology and protein engineering. Early applications of inteins focused on self-cleaving affinity tags, generation of recombinant polypeptide α-thioesters for the production of semisynthetic proteins and backbone cyclized polypeptides. The discovery of naturallyoccurring split-inteins has allowed the development of novel approaches for the selective modification of proteins both in vitro and in vivo. This review gives a general introduction to protein splicing with a focus on their role in expanding the applications of intein-based technologies in protein engineering and chemical biology.
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Affiliation(s)
- Corina Sarmiento
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA9033 USA
| | - Julio A. Camarero
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA9033 USA
- Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA9033 USA
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-9121, USA
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Lee E, Min K, Chang YT, Kwon Y. Efficient and wash-free labeling of membrane proteins using engineered Npu DnaE split-inteins. Protein Sci 2018; 27:1568-1574. [PMID: 30151847 DOI: 10.1002/pro.3455] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 06/08/2018] [Accepted: 06/11/2018] [Indexed: 01/01/2023]
Abstract
An efficient and wash-free method to conjugate a fluorescent tag to a target membrane protein is developed, using engineered Npu DnaE split-inteins. This approach allowed fast labeling while avoiding the strenuous synthesis of a long polypeptide. Two different modes of labeling, namely specific binding and covalent conjugation, are observed. The covalent labeling was monitored within 5 min, without background staining.
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Affiliation(s)
- Euiyeon Lee
- Department of Biomedical Engineering, Dongguk University, Seoul, 04620, South Korea
| | - Kyoungmi Min
- Department of Biomedical Engineering, Dongguk University, Seoul, 04620, South Korea
| | - Young-Tae Chang
- Center for Self-assembly and Complexity, Institute for Basic Science (IBS), Pohang, 37673, South Korea.,Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Youngeun Kwon
- Department of Biomedical Engineering, Dongguk University, Seoul, 04620, South Korea
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Wang X, Zhang G. [Advances in protein cyclization]. Sheng Wu Gong Cheng Xue Bao 2016; 32:430-439. [PMID: 28853264 DOI: 10.13345/j.cjb.150284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Proteins, which exist mainly in linear form in vivo, are easily affected by the change of ambient temperature and pH. The application of proteins (enzymes) in the fields of industrial catalyzing, food manufacturing and medicine are restricted due to their properties. The cyclic structure of natural cyclic peptides confers high thermal stability on itself; such mechanism can be referred to in further enhancement of the thermal stability and transformation of the structure of enzymes. This article reviewed the latest progress in the domestic and international studies on protein cyclization and summarized the traditional methods (such as protein trans-splicing, expressed protein ligation and sortase-catalyzed transpeptidation) in protein cyclization. A novel method based on SpyTag/SpyCather-mediated enzyme cyclization was discussed in more detail.
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Affiliation(s)
- Xinzhe Wang
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, Fujian, China
| | - Guangya Zhang
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, Fujian, China
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Weichert N, Hauptmann V, Helmold C, Conrad U. Seed-Specific Expression of Spider Silk Protein Multimers Causes Long-Term Stability. Front Plant Sci 2016; 7:6. [PMID: 26858734 PMCID: PMC4729946 DOI: 10.3389/fpls.2016.00006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 01/06/2016] [Indexed: 05/26/2023]
Abstract
Seeds enable plants to germinate and to grow in situations of limited availability of nutrients. The stable storage of different seed proteins is a remarkable presumption for successful germination and growth. These strategies have been adapted and used in several molecular farming projects. In this study, we explore the benefits of seed-based expression to produce the high molecular weight spider silk protein FLAG using intein-based trans-splicing. Multimers larger than 460 kDa in size are routinely produced, which is above the native size of the FLAG protein. The storage of seeds for 8 weeks and 1 year at an ambient temperature of 15°C does not influence the accumulation level. Even the extended storage time does not influence the typical pattern of multimerized bands. These results show that seeds are the method of choice for stable accumulation of products of complex transgenes and have the capability for long-term storage at moderate conditions, an important feature for the development of suitable downstream processes.
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Abstract
Protein splicing in trans by split inteins has increasingly become a powerful protein-engineering tool for protein ligation, both in vivo and in vitro. Over 100 naturally occurring and artificially engineered split inteins have been reported for protein ligation using protein trans-splicing. Here, we review the current status of the reported split inteins in order to delineate an empirical or rational strategy for constructing new split inteins suitable for various applications in biotechnology and chemical biology.
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Affiliation(s)
- A Sesilja Aranko
- Research Program in Structural Biology and Biophysics, Institute of Biotechnology, University of Helsinki, P.O. Box 65, Helsinki FIN-00014, Finland
| | - Alexander Wlodawer
- Macromolecular Crystallography Laboratory, National Cancer Institute-Frederick, MD 21702, USA
| | - Hideo Iwaï
- Research Program in Structural Biology and Biophysics, Institute of Biotechnology, University of Helsinki, P.O. Box 65, Helsinki FIN-00014, Finland
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