1
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Yang X, Su XC, Xuan W. Genetically Encoded Photocaged Proteinogenic and Non-Proteinogenic Amino Acids. Chembiochem 2024; 25:e202400393. [PMID: 38831474 DOI: 10.1002/cbic.202400393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/31/2024] [Accepted: 06/03/2024] [Indexed: 06/05/2024]
Abstract
Photocaged amino acids could be genetically encoded into proteins via genetic code expansion (GCE) and constitute unique tools for innovative protein engineering. There are a number of photocaged proteinogenic amino acids that allow strategic conversion of proteins into their photocaged variants, thus enabling spatiotemporal and non-invasive regulation of protein functions using light. Meanwhile, there are a hand of photocaged non-proteinogenic amino acids that address the challenges in directly encoding certain non-canonical amino acids (ncAAs) that structurally resemble proteinogenic ones or possess highly reactive functional groups. Herein, we would like to summarize the efforts in encoding photocaged proteinogenic and non-proteinogenic amino acids, hoping to draw more attention to this fruitful and exciting scientific campaign.
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Affiliation(s)
- Xiaochen Yang
- Frontier Science Center for Synthetic Biology (Ministry of Education), School of Life Sciences, Faculty of Medicine, Tianjin University, Tianjin, 300072, China
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Xun-Cheng Su
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Weimin Xuan
- Frontier Science Center for Synthetic Biology (Ministry of Education), School of Life Sciences, Faculty of Medicine, Tianjin University, Tianjin, 300072, China
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2
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Birch-Price Z, Hardy FJ, Lister TM, Kohn AR, Green AP. Noncanonical Amino Acids in Biocatalysis. Chem Rev 2024; 124:8740-8786. [PMID: 38959423 PMCID: PMC11273360 DOI: 10.1021/acs.chemrev.4c00120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 06/11/2024] [Accepted: 06/12/2024] [Indexed: 07/05/2024]
Abstract
In recent years, powerful genetic code reprogramming methods have emerged that allow new functional components to be embedded into proteins as noncanonical amino acid (ncAA) side chains. In this review, we will illustrate how the availability of an expanded set of amino acid building blocks has opened a wealth of new opportunities in enzymology and biocatalysis research. Genetic code reprogramming has provided new insights into enzyme mechanisms by allowing introduction of new spectroscopic probes and the targeted replacement of individual atoms or functional groups. NcAAs have also been used to develop engineered biocatalysts with improved activity, selectivity, and stability, as well as enzymes with artificial regulatory elements that are responsive to external stimuli. Perhaps most ambitiously, the combination of genetic code reprogramming and laboratory evolution has given rise to new classes of enzymes that use ncAAs as key catalytic elements. With the framework for developing ncAA-containing biocatalysts now firmly established, we are optimistic that genetic code reprogramming will become a progressively more powerful tool in the armory of enzyme designers and engineers in the coming years.
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Affiliation(s)
| | | | | | | | - Anthony P. Green
- Manchester Institute of Biotechnology,
School of Chemistry, University of Manchester, Manchester M1 7DN, U.K.
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3
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Yi HB, Lee S, Seo K, Kim H, Kim M, Lee HS. Cellular and Biophysical Applications of Genetic Code Expansion. Chem Rev 2024; 124:7465-7530. [PMID: 38753805 DOI: 10.1021/acs.chemrev.4c00112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Despite their diverse functions, proteins are inherently constructed from a limited set of building blocks. These compositional constraints pose significant challenges to protein research and its practical applications. Strategically manipulating the cellular protein synthesis system to incorporate novel building blocks has emerged as a critical approach for overcoming these constraints in protein research and application. In the past two decades, the field of genetic code expansion (GCE) has achieved significant advancements, enabling the integration of numerous novel functionalities into proteins across a variety of organisms. This technological evolution has paved the way for the extensive application of genetic code expansion across multiple domains, including protein imaging, the introduction of probes for protein research, analysis of protein-protein interactions, spatiotemporal control of protein function, exploration of proteome changes induced by external stimuli, and the synthesis of proteins endowed with novel functions. In this comprehensive Review, we aim to provide an overview of cellular and biophysical applications that have employed GCE technology over the past two decades.
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Affiliation(s)
- Han Bin Yi
- Department of Chemistry, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Republic of Korea
| | - Seungeun Lee
- Department of Chemistry, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Republic of Korea
| | - Kyungdeok Seo
- Department of Chemistry, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Republic of Korea
| | - Hyeongjo Kim
- Department of Chemistry, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Republic of Korea
| | - Minah Kim
- Department of Chemistry, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Republic of Korea
| | - Hyun Soo Lee
- Department of Chemistry, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Republic of Korea
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4
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Yang X, Zhao L, Wang Y, Ji Y, Su XC, Ma JA, Xuan W. Constructing Photoactivatable Protein with Genetically Encoded Photocaged Glutamic Acid. Angew Chem Int Ed Engl 2023; 62:e202308472. [PMID: 37587083 DOI: 10.1002/anie.202308472] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 07/28/2023] [Accepted: 08/16/2023] [Indexed: 08/18/2023]
Abstract
Genetically replacing an essential residue with the corresponding photocaged analogues via genetic code expansion (GCE) constitutes a useful and unique strategy to directly and effectively generate photoactivatable proteins. However, the application of this strategy is severely hampered by the limited number of encoded photocaged proteinogenic amino acids. Herein, we report the genetic incorporation of photocaged glutamic acid analogues in E. coli and mammalian cells and demonstrate their use in constructing photoactivatable variants of various fluorescent proteins and SpyCatcher. We believe genetically encoded photocaged Glu would significantly promote the design and application of photoactivatable proteins in many areas.
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Affiliation(s)
- Xiaochen Yang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Lei Zhao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Ying Wang
- School of Life Sciences, Tianjin University, Tianjin, 300072, China
| | - Yanli Ji
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Xun-Cheng Su
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Jun-An Ma
- Department of Chemistry, Frontier Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin, 300072, P. R. China
| | - Weimin Xuan
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
- School of Life Sciences, Tianjin University, Tianjin, 300072, China
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5
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Engineering of enzymes using non-natural amino acids. Biosci Rep 2022; 42:231590. [PMID: 35856922 PMCID: PMC9366748 DOI: 10.1042/bsr20220168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 07/05/2022] [Accepted: 07/20/2022] [Indexed: 11/17/2022] Open
Abstract
In enzyme engineering, the main targets for enhancing properties are enzyme activity, stereoselective specificity, stability, substrate range, and the development of unique functions. With the advent of genetic code extension technology, non-natural amino acids (nnAAs) are able to be incorporated into proteins in a site-specific or residue-specific manner, which breaks the limit of 20 natural amino acids for protein engineering. Benefitting from this approach, numerous enzymes have been engineered with nnAAs for improved properties or extended functionality. In this review, we focus on applications and strategies for using nnAAs in enzyme engineering. Notably, approaches to computational modelling of enzymes with nnAAs are also addressed. Finally, we discuss the bottlenecks that currently need to be addressed in order to realise the broader prospects of this genetic code extension technique.
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6
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Kneuttinger AC. A guide to designing photocontrol in proteins: methods, strategies and applications. Biol Chem 2022; 403:573-613. [PMID: 35355495 DOI: 10.1515/hsz-2021-0417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 03/08/2022] [Indexed: 12/20/2022]
Abstract
Light is essential for various biochemical processes in all domains of life. In its presence certain proteins inside a cell are excited, which either stimulates or inhibits subsequent cellular processes. The artificial photocontrol of specifically proteins is of growing interest for the investigation of scientific questions on the organismal, cellular and molecular level as well as for the development of medicinal drugs or biocatalytic tools. For the targeted design of photocontrol in proteins, three major methods have been developed over the last decades, which employ either chemical engineering of small-molecule photosensitive effectors (photopharmacology), incorporation of photoactive non-canonical amino acids by genetic code expansion (photoxenoprotein engineering), or fusion with photoreactive biological modules (hybrid protein optogenetics). This review compares the different methods as well as their strategies and current applications for the light-regulation of proteins and provides background information useful for the implementation of each technique.
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Affiliation(s)
- Andrea C Kneuttinger
- Institute of Biophysics and Physical Biochemistry and Regensburg Center for Biochemistry, University of Regensburg, D-93040 Regensburg, Germany
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7
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Abele T, Messer T, Jahnke K, Hippler M, Bastmeyer M, Wegener M, Göpfrich K. Two-Photon 3D Laser Printing Inside Synthetic Cells. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2106709. [PMID: 34800321 DOI: 10.1002/adma.202106709] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/17/2021] [Indexed: 06/13/2023]
Abstract
Toward the ambitious goal of manufacturing synthetic cells from the bottom up, various cellular components have already been reconstituted inside lipid vesicles. However, the deterministic positioning of these components inside the compartment has remained elusive. Here, by using two-photon 3D laser printing, 2D and 3D hydrogel architectures are manufactured with high precision and nearly arbitrary shape inside preformed giant unilamellar lipid vesicles (GUVs). The required water-soluble photoresist is brought into the GUVs by diffusion in a single mixing step. Crucially, femtosecond two-photon printing inside the compartment does not destroy the GUVs. Beyond this proof-of-principle demonstration, early functional architectures are realized. In particular, a transmembrane structure acting as a pore is 3D printed, thereby allowing for the transport of biological cargo, including DNA, into the synthetic compartment. These experiments show that two-photon 3D laser microprinting can be an important addition to the existing toolbox of synthetic biology.
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Affiliation(s)
- Tobias Abele
- Biophysical Engineering Group, Max Planck Institute for Medical Research, Jahnstraße 29, 69120, Heidelberg, Germany
- Department of Physics and Astronomy, Heidelberg University, 69120, Heidelberg, Germany
| | - Tobias Messer
- Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany
| | - Kevin Jahnke
- Biophysical Engineering Group, Max Planck Institute for Medical Research, Jahnstraße 29, 69120, Heidelberg, Germany
- Department of Physics and Astronomy, Heidelberg University, 69120, Heidelberg, Germany
| | - Marc Hippler
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Zoological Institute, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 4, 76131, Karlsruhe, Germany
| | - Martin Bastmeyer
- Zoological Institute, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 4, 76131, Karlsruhe, Germany
- Institute for Biological and Chemical Systems - Biological Information Processing (IBCS-BIP), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Martin Wegener
- Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Kerstin Göpfrich
- Biophysical Engineering Group, Max Planck Institute for Medical Research, Jahnstraße 29, 69120, Heidelberg, Germany
- Department of Physics and Astronomy, Heidelberg University, 69120, Heidelberg, Germany
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8
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Kesici MZ, Tinnefeld P, Vera AM. A simple and general approach to generate photoactivatable DNA processing enzymes. Nucleic Acids Res 2021; 50:e31. [PMID: 34904657 PMCID: PMC8989547 DOI: 10.1093/nar/gkab1212] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/08/2021] [Accepted: 11/25/2021] [Indexed: 11/29/2022] Open
Abstract
DNA processing enzymes, such as DNA polymerases and endonucleases, have found many applications in biotechnology, molecular diagnostics, and synthetic biology, among others. The development of enzymes with controllable activity, such as hot-start or light-activatable versions, has boosted their applications and improved the sensitivity and specificity of the existing ones. However, current approaches to produce controllable enzymes are experimentally demanding to develop and case-specific. Here, we introduce a simple and general method to design light-start DNA processing enzymes. In order to prove its versatility, we applied our method to three DNA polymerases commonly used in biotechnology, including the Phi29 (mesophilic), Taq, and Pfu polymerases, and one restriction enzyme. Light-start enzymes showed suppressed polymerase, exonuclease, and endonuclease activity until they were re-activated by an UV pulse. Finally, we applied our enzymes to common molecular biology assays and showed comparable performance to commercial hot-start enzymes.
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Affiliation(s)
- Merve-Zeynep Kesici
- Department of Chemistry and Center for NanoScience, Ludwig-Maximilians-Universität München, München 81377, Germany
| | - Philip Tinnefeld
- Department of Chemistry and Center for NanoScience, Ludwig-Maximilians-Universität München, München 81377, Germany
| | - Andrés Manuel Vera
- Department of Chemistry and Center for NanoScience, Ludwig-Maximilians-Universität München, München 81377, Germany
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9
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Chang Z, Mao S, Zheng YY, Sheng J. Synthesis and Functionality Study of Photoswitchable Hydrazone Oligodeoxynucleotides. Curr Protoc 2021; 1:e295. [PMID: 34792862 DOI: 10.1002/cpz1.295] [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: 11/06/2022]
Abstract
This article provides a detailed procedure for the chemical synthesis and characterization of photoswitchable hydrazone phosphoramidite and its incorporation into oligodeoxynucleotides. The synthesis starts with commercially available deoxyuridine, followed by conversion of the 4-oxo into a 4-chloro moiety via Appel reaction to install the key hydrazone group in the absence of base. The hydrazone phosphoramidite building block is compatible with the conventional amidite chemistry protocols for solid-phase synthesis of oligodeoxynucleotides. Our method expands the current nucleotide pool by adding a novel, functional DNA building block that is suitable for a broad spectrum of applications, including the regulation of DNA-enzyme interactions and DNA synthesis by irradiation with cell-friendly blue light. © 2021 Wiley Periodicals LLC. Basic Protocol 1: Preparation of photoswitchable hydrazone phosphoramidite Basic Protocol 2: Synthesis and purification of oligodeoxynucleotides containing the hydrazone photoswitch Basic Protocol 3: Primer extension assay for functionality studies of hydrazone cytidine.
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Affiliation(s)
- Zhihua Chang
- Department of Chemistry and The RNA Institute, University at Albany, State University of New York, Albany, New York
| | - Song Mao
- Department of Chemistry and The RNA Institute, University at Albany, State University of New York, Albany, New York
| | - Ya Ying Zheng
- Department of Chemistry and The RNA Institute, University at Albany, State University of New York, Albany, New York
| | - Jia Sheng
- Department of Chemistry and The RNA Institute, University at Albany, State University of New York, Albany, New York
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10
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Mao S, Chang Z, Ying Zheng Y, Shekhtman A, Sheng J. DNA Functionality with Photoswitchable Hydrazone Cytidine*. Chemistry 2021; 27:8372-8379. [PMID: 33872432 DOI: 10.1002/chem.202100742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Indexed: 12/18/2022]
Abstract
A new family of hydrazone modified cytidine phosphoramidite building block was synthesized and incorporated into oligodeoxynucleotides to construct photoswitchable DNA strands. The E-Z isomerization triggered by the irradiation of blue light with a wavelength of 450 nm was investigated and confirmed by 1 H NMR spectroscopy and HPLC in the contexts of both nucleoside and oligodeoxynucleotide. The light activated Z form isomer of this hydrazone-cytidine with a six-member intramolecular hydrogen bond was found to inhibit DNA synthesis in the primer extension model by using Bst DNA polymerase. In addition, the hydrazone modification caused the misincorporation of dATP together with dGTP into the growing DNA strand with similar selectivity, highlighting a potential G to A mutation. This work provides a novel functional DNA building block and an additional molecular tool that has potential chemical biology and biomedicinal applications to control DNA synthesis and DNA-enzyme interactions using the cell friendly blue light irradiation.
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Affiliation(s)
- Song Mao
- Department of Chemistry, University at Albany, State University of New York, 1400 Washington Ave., Albany, NY, 1222, USA.,The RNA Institute, University at Albany State University of New York, 1400 Washington Ave., Albany, NY, 1222, USA
| | - Zhihua Chang
- Department of Chemistry, University at Albany, State University of New York, 1400 Washington Ave., Albany, NY, 1222, USA.,The RNA Institute, University at Albany State University of New York, 1400 Washington Ave., Albany, NY, 1222, USA
| | - Ya Ying Zheng
- Department of Chemistry, University at Albany, State University of New York, 1400 Washington Ave., Albany, NY, 1222, USA.,The RNA Institute, University at Albany State University of New York, 1400 Washington Ave., Albany, NY, 1222, USA
| | - Alexander Shekhtman
- Department of Chemistry, University at Albany, State University of New York, 1400 Washington Ave., Albany, NY, 1222, USA
| | - Jia Sheng
- Department of Chemistry, University at Albany, State University of New York, 1400 Washington Ave., Albany, NY, 1222, USA.,The RNA Institute, University at Albany State University of New York, 1400 Washington Ave., Albany, NY, 1222, USA
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11
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Pagar AD, Patil MD, Flood DT, Yoo TH, Dawson PE, Yun H. Recent Advances in Biocatalysis with Chemical Modification and Expanded Amino Acid Alphabet. Chem Rev 2021; 121:6173-6245. [PMID: 33886302 DOI: 10.1021/acs.chemrev.0c01201] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The two main strategies for enzyme engineering, directed evolution and rational design, have found widespread applications in improving the intrinsic activities of proteins. Although numerous advances have been achieved using these ground-breaking methods, the limited chemical diversity of the biopolymers, restricted to the 20 canonical amino acids, hampers creation of novel enzymes that Nature has never made thus far. To address this, much research has been devoted to expanding the protein sequence space via chemical modifications and/or incorporation of noncanonical amino acids (ncAAs). This review provides a balanced discussion and critical evaluation of the applications, recent advances, and technical breakthroughs in biocatalysis for three approaches: (i) chemical modification of cAAs, (ii) incorporation of ncAAs, and (iii) chemical modification of incorporated ncAAs. Furthermore, the applications of these approaches and the result on the functional properties and mechanistic study of the enzymes are extensively reviewed. We also discuss the design of artificial enzymes and directed evolution strategies for enzymes with ncAAs incorporated. Finally, we discuss the current challenges and future perspectives for biocatalysis using the expanded amino acid alphabet.
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Affiliation(s)
- Amol D Pagar
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Mahesh D Patil
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Dillon T Flood
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Tae Hyeon Yoo
- Department of Molecular Science and Technology, Ajou University, 206 World cup-ro, Yeongtong-gu, Suwon 16499, Korea
| | - Philip E Dawson
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Hyungdon Yun
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
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12
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Baumschlager A, Khammash M. Synthetic Biological Approaches for Optogenetics and Tools for Transcriptional Light-Control in Bacteria. Adv Biol (Weinh) 2021; 5:e2000256. [PMID: 34028214 DOI: 10.1002/adbi.202000256] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 01/11/2021] [Indexed: 12/22/2022]
Abstract
Light has become established as a tool not only to visualize and investigate but also to steer biological systems. This review starts by discussing the unique features that make light such an effective control input in biology. It then gives an overview of how light-control came to progress, starting with photoactivatable compounds and leading up to current genetic implementations using optogenetic approaches. The review then zooms in on optogenetics, focusing on photosensitive proteins, which form the basis for optogenetic engineering using synthetic biological approaches. As the regulation of transcription provides a highly versatile means for steering diverse biological functions, the focus of this review then shifts to transcriptional light regulators, which are presented in the biotechnologically highly relevant model organism Escherichia coli.
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Affiliation(s)
- Armin Baumschlager
- Department of Biosystems Science and Engineering (D-BSSE), ETH-Zürich, Mattenstrasse 26, Basel, 4058, Switzerland
| | - Mustafa Khammash
- Department of Biosystems Science and Engineering (D-BSSE), ETH-Zürich, Mattenstrasse 26, Basel, 4058, Switzerland
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13
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Bridge T, Shaikh SA, Thomas P, Botta J, McCormick PJ, Sachdeva A. Site-Specific Encoding of Photoactivity in Antibodies Enables Light-Mediated Antibody-Antigen Binding on Live Cells. Angew Chem Int Ed Engl 2019; 58:17986-17993. [PMID: 31609054 PMCID: PMC6973043 DOI: 10.1002/anie.201908655] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 09/11/2019] [Indexed: 12/20/2022]
Abstract
Antibodies have found applications in several fields, including, medicine, diagnostics, and nanotechnology, yet methods to modulate antibody-antigen binding using an external agent remain limited. Here, we have developed photoactive antibody fragments by genetic site-specific replacement of single tyrosine residues with photocaged tyrosine, in an antibody fragment, 7D12. A simple and robust assay is adopted to evaluate the light-mediated binding of 7D12 mutants to its target, epidermal growth factor receptor (EGFR), on the surface of cancer cells. Presence of photocaged tyrosine reduces 7D12-EGFR binding affinity by over 20-fold in two out of three 7D12 mutants studied, and binding is restored upon exposure to 365 nm light. Molecular dynamics simulations explain the difference in effect of photocaging on 7D12-EGFR interaction among the mutants. Finally, we demonstrate the application of photoactive antibodies in delivering fluorophores to EGFR-positive live cancer cells in a light-dependent manner.
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Affiliation(s)
- Thomas Bridge
- School of ChemistryUniversity of East AngliaNorwichNR4 7TJUK
| | - Saher A. Shaikh
- School of ChemistryUniversity of East AngliaNorwichNR4 7TJUK
| | - Paul Thomas
- The Henry Wellcome Laboratory of Cell ImagingUniversity of East AngliaNorwichNR4 7TJUK
| | - Joaquin Botta
- Centre of EndocrinologyWilliam Harvey Research InstituteQueen Mary University LondonCharterhouse SquareLondonEC1M 6BQUK
| | - Peter J. McCormick
- Centre of EndocrinologyWilliam Harvey Research InstituteQueen Mary University LondonCharterhouse SquareLondonEC1M 6BQUK
| | - Amit Sachdeva
- School of ChemistryUniversity of East AngliaNorwichNR4 7TJUK
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14
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Bridge T, Shaikh SA, Thomas P, Botta J, McCormick PJ, Sachdeva A. Site‐Specific Encoding of Photoactivity in Antibodies Enables Light‐Mediated Antibody–Antigen Binding on Live Cells. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908655] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Thomas Bridge
- School of ChemistryUniversity of East Anglia Norwich NR4 7TJ UK
| | - Saher A. Shaikh
- School of ChemistryUniversity of East Anglia Norwich NR4 7TJ UK
| | - Paul Thomas
- The Henry Wellcome Laboratory of Cell ImagingUniversity of East Anglia Norwich NR4 7TJ UK
| | - Joaquin Botta
- Centre of EndocrinologyWilliam Harvey Research InstituteQueen Mary University London Charterhouse Square London EC1M 6BQ UK
| | - Peter J. McCormick
- Centre of EndocrinologyWilliam Harvey Research InstituteQueen Mary University London Charterhouse Square London EC1M 6BQ UK
| | - Amit Sachdeva
- School of ChemistryUniversity of East Anglia Norwich NR4 7TJ UK
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15
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Kneuttinger AC, Zwisele S, Straub K, Bruckmann A, Busch F, Kinateder T, Gaim B, Wysocki VH, Merkl R, Sterner R. Light-Regulation of Tryptophan Synthase by Combining Protein Design and Enzymology. Int J Mol Sci 2019; 20:E5106. [PMID: 31618845 PMCID: PMC6829457 DOI: 10.3390/ijms20205106] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 10/11/2019] [Accepted: 10/12/2019] [Indexed: 01/24/2023] Open
Abstract
The spatiotemporal control of enzymes by light is of growing importance for industrial biocatalysis. Within this context, the photo-control of allosteric interactions in enzyme complexes, common to practically all metabolic pathways, is particularly relevant. A prominent example of a metabolic complex with a high application potential is tryptophan synthase from Salmonella typhimurium (TS), in which the constituting TrpA and TrpB subunits mutually stimulate each other via a sophisticated allosteric network. To control TS allostery with light, we incorporated the unnatural amino acid o-nitrobenzyl-O-tyrosine (ONBY) at seven strategic positions of TrpA and TrpB. Initial screening experiments showed that ONBY in position 58 of TrpA (aL58ONBY) inhibits TS activity most effectively. Upon UV irradiation, ONBY decages to tyrosine, largely restoring the capacity of TS. Biochemical characterization, extensive steady-state enzyme kinetics, and titration studies uncovered the impact of aL58ONBY on the activities of TrpA and TrpB and identified reaction conditions under which the influence of ONBY decaging on allostery reaches its full potential. By applying those optimal conditions, we succeeded to directly light-activate TS(aL58ONBY) by a factor of ~100. Our findings show that rational protein design with a photo-sensitive unnatural amino acid combined with extensive enzymology is a powerful tool to fine-tune allosteric light-activation of a central metabolic enzyme complex.
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Affiliation(s)
- Andrea C Kneuttinger
- Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany.
| | - Stefanie Zwisele
- Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany.
| | - Kristina Straub
- Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany.
| | - Astrid Bruckmann
- Institute of Biochemistry, Genetics and Microbiology, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany.
| | - Florian Busch
- Department of Chemistry and Biochemistry and Resource for Native Mass Spectrometry Guided Structural Biology, The Ohio State University, Columbus, OH 43210, USA.
| | - Thomas Kinateder
- Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany.
| | - Barbara Gaim
- Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany.
| | - Vicki H Wysocki
- Department of Chemistry and Biochemistry and Resource for Native Mass Spectrometry Guided Structural Biology, The Ohio State University, Columbus, OH 43210, USA.
| | - Rainer Merkl
- Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany.
| | - Reinhard Sterner
- Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany.
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16
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Courtney TM, Deiters A. Optical control of protein phosphatase function. Nat Commun 2019; 10:4384. [PMID: 31558717 PMCID: PMC6763421 DOI: 10.1038/s41467-019-12260-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 08/28/2019] [Indexed: 12/12/2022] Open
Abstract
Protein phosphatases are involved in embryonic development, metabolic homeostasis, stress response, cell cycle transitions, and many other essential biological mechanisms. Unlike kinases, protein phosphatases remain understudied and less characterized. Traditional genetic and biochemical methods have contributed significantly to our understanding; however, these methodologies lack precise and acute spatiotemporal control. Here, we report the development of a light-activated protein phosphatase, the dual specificity phosphatase 6 (DUSP6 or MKP3). Through genetic code expansion, MKP3 is placed under optical control via two different approaches: (i) incorporation of a caged cysteine into the active site for controlling catalytic activity and (ii) incorporation of a caged lysine into the kinase interaction motif for controlling the protein-protein interaction between the phosphatase and its substrate. Both strategies are expected to be applicable to the engineering of a wide range of light-activated phosphatases. Applying the optogenetically controlled MKP3 in conjunction with live cell reporters, we discover that ERK nuclear translocation is regulated in a graded manner in response to increasing MKP3 activity.
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Affiliation(s)
- Taylor M Courtney
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Alexander Deiters
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA.
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17
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Claaßen C, Gerlach T, Rother D. Stimulus-Responsive Regulation of Enzyme Activity for One-Step and Multi-Step Syntheses. Adv Synth Catal 2019; 361:2387-2401. [PMID: 31244574 PMCID: PMC6582597 DOI: 10.1002/adsc.201900169] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 03/25/2019] [Indexed: 01/20/2023]
Abstract
Multi-step biocatalytic reactions have gained increasing importance in recent years because the combination of different enzymes enables the synthesis of a broad variety of industrially relevant products. However, the more enzymes combined, the more crucial it is to avoid cross-reactivity in these cascade reactions and thus achieve high product yields and high purities. The selective control of enzyme activity, i.e., remote on-/off-switching of enzymes, might be a suitable tool to avoid the formation of unwanted by-products in multi-enzyme reactions. This review compiles a range of methods that are known to modulate enzyme activity in a stimulus-responsive manner. It focuses predominantly on in vitro systems and is subdivided into reversible and irreversible enzyme activity control. Furthermore, a discussion section provides indications as to which factors should be considered when designing and choosing activity control systems for biocatalysis. Finally, an outlook is given regarding the future prospects of the field.
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Affiliation(s)
- Christiane Claaßen
- Institute of Bio- and Geosciences – Biotechnology (IBG-1)Forschungszentrum Jülich GmbH52425JülichGermany
| | - Tim Gerlach
- Institute of Bio- and Geosciences – Biotechnology (IBG-1)Forschungszentrum Jülich GmbH52425JülichGermany
- Aachen Biology and Biotechnology (ABBt)RWTH Aachen University52074AachenGermany
| | - Dörte Rother
- Institute of Bio- and Geosciences – Biotechnology (IBG-1)Forschungszentrum Jülich GmbH52425JülichGermany
- Aachen Biology and Biotechnology (ABBt)RWTH Aachen University52074AachenGermany
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18
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Baumann T, Hauf M, Richter F, Albers S, Möglich A, Ignatova Z, Budisa N. Computational Aminoacyl-tRNA Synthetase Library Design for Photocaged Tyrosine. Int J Mol Sci 2019; 20:ijms20092343. [PMID: 31083552 PMCID: PMC6539999 DOI: 10.3390/ijms20092343] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/07/2019] [Accepted: 05/09/2019] [Indexed: 01/20/2023] Open
Abstract
Engineering aminoacyl-tRNA synthetases (aaRSs) provides access to the ribosomal incorporation of noncanonical amino acids via genetic code expansion. Conventional targeted mutagenesis libraries with 5–7 positions randomized cover only marginal fractions of the vast sequence space formed by up to 30 active site residues. This frequently results in selection of weakly active enzymes. To overcome this limitation, we use computational enzyme design to generate a focused library of aaRS variants. For aaRS enzyme redesign, photocaged ortho-nitrobenzyl tyrosine (ONBY) was chosen as substrate due to commercial availability and its diverse applications. Diversifying 17 first- and second-shell sites and performing conventional aaRS positive and negative selection resulted in a high-activity aaRS. This MjTyrRS variant carries ten mutations and outperforms previously reported ONBY-specific aaRS variants isolated from traditional libraries. In response to a single in-frame amber stop codon, it mediates the in vivo incorporation of ONBY with an efficiency matching that of the wild type MjTyrRS enzyme acylating cognate tyrosine. These results exemplify an improved general strategy for aaRS library design and engineering.
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Affiliation(s)
- Tobias Baumann
- Institut für Chemie, Technische Universität Berlin, Müller-Breslau-Straße 10, 10623 Berlin, Germany.
| | - Matthias Hauf
- Institut für Chemie, Technische Universität Berlin, Müller-Breslau-Straße 10, 10623 Berlin, Germany.
| | - Florian Richter
- Biophysikalische Chemie, Institut für Biologie, Humboldt-Universität zu Berlin, 10115 Berlin, Germany.
| | - Suki Albers
- Institute of Biochemistry and Molecular Biology, University of Hamburg, 20146 Hamburg, Germany.
| | - Andreas Möglich
- Biophysikalische Chemie, Institut für Biologie, Humboldt-Universität zu Berlin, 10115 Berlin, Germany.
- Lehrstuhl für Biochemie, Universität Bayreuth, 95447 Bayreuth, Germany.
| | - Zoya Ignatova
- Institute of Biochemistry and Molecular Biology, University of Hamburg, 20146 Hamburg, Germany.
| | - Nediljko Budisa
- Institut für Chemie, Technische Universität Berlin, Müller-Breslau-Straße 10, 10623 Berlin, Germany.
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
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19
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Brown W, Deiters A. Light-activation of Cre recombinase in zebrafish embryos through genetic code expansion. Methods Enzymol 2019; 624:265-281. [PMID: 31370934 DOI: 10.1016/bs.mie.2019.04.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cre recombinase-mediated DNA recombination is an established method for conditional control of gene expression in animal models. Regulation of its activity has been accomplished to impart spatial and/or temporal control over recombination of the target gene. In this chapter, optical control of Cre recombinase in developing zebrafish embryos through genetic code expansion is discussed. This method takes advantage of an evolved aminoacyl tRNA synthetase and tRNA pair that can incorporate an unnatural amino acid (UAA) into proteins in response to an amber stop codon (TAG). Genetic code expansion is used to replace a lysine residue critical to Cre recombinase function with a photocaged analogue of lysine, successfully blocking DNA recombination until irradiation with 405nm light. Use of optically controlled Cre recombinase for cell-lineage tracing experiments in zebrafish embryos is highlighted, demonstrating the ability to target small populations of cells at different developmental time points for recombination. Optically controlled Cre recombinase showed no background activity and precise activation upon irradiation, making it a useful new tool for studying development and disease in the zebrafish embryo.
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Affiliation(s)
- Wes Brown
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, United States
| | - Alexander Deiters
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, United States.
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20
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Wang SR, Wang JQ, Fu BS, Chen K, Xiong W, Wei L, Qing G, Tian T, Zhou X. Supramolecular Coordination-Directed Reversible Regulation of Protein Activities at Epigenetic DNA Marks. J Am Chem Soc 2018; 140:15842-15849. [DOI: 10.1021/jacs.8b09113] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Shao-Ru Wang
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, Wuhan 430072, Hubei, China
| | - Jia-Qi Wang
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, Wuhan 430072, Hubei, China
| | - Bo-Shi Fu
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, Wuhan 430072, Hubei, China
- Department of Pharmacology, School of Pharmacy, China Medical University, Shenyang 110122, Liaoning, China
| | - Kun Chen
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, Wuhan 430072, Hubei, China
| | - Wei Xiong
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, Wuhan 430072, Hubei, China
| | - Lai Wei
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, Wuhan 430072, Hubei, China
| | - Guangyan Qing
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Tian Tian
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, Wuhan 430072, Hubei, China
| | - Xiang Zhou
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, Wuhan 430072, Hubei, China
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21
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Courtney T, Deiters A. Recent advances in the optical control of protein function through genetic code expansion. Curr Opin Chem Biol 2018; 46:99-107. [PMID: 30056281 DOI: 10.1016/j.cbpa.2018.07.011] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 05/21/2018] [Accepted: 07/13/2018] [Indexed: 11/30/2022]
Abstract
In nature, biological processes are regulated with precise spatial and temporal resolution at the molecular, cellular, and organismal levels. In order to perturb and manipulate these processes, optically controlled chemical tools have been developed and applied in living systems. The use of light as an external trigger provides spatial and temporal control with minimal adverse effects. Incorporation of light-responsive amino acids into proteins in cells and organisms with an expanded genetic code has enabled the precise activation/deactivation of numerous, diverse proteins, such as kinases, nucleases, proteases, and polymerases. Using unnatural amino acids to generate light-triggered proteins enables a rational engineering approach that is based on mechanistic and/or structural information. This review focuses on the most recent developments in the field, including technological advances and biological applications.
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Affiliation(s)
- Taylor Courtney
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, United States
| | - Alexander Deiters
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, United States.
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22
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Polstein LR, Juhas M, Hanna G, Bursac N, Gersbach CA. An Engineered Optogenetic Switch for Spatiotemporal Control of Gene Expression, Cell Differentiation, and Tissue Morphogenesis. ACS Synth Biol 2017; 6:2003-2013. [PMID: 28793186 DOI: 10.1021/acssynbio.7b00147] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The precise spatial and temporal control of gene expression, cell differentiation, and tissue morphogenesis has widespread application in regenerative medicine and the study of tissue development. In this work, we applied optogenetics to control cell differentiation and new tissue formation. Specifically, we engineered an optogenetic "on" switch that provides permanent transgene expression following a transient dose of blue light illumination. To demonstrate its utility in controlling cell differentiation and reprogramming, we incorporated an engineered form of the master myogenic factor MyoD into this system in multipotent cells. Illumination of cells with blue light activated myogenic differentiation, including upregulation of myogenic markers and fusion into multinucleated myotubes. Cell differentiation was spatially patterned by illumination of cell cultures through a photomask. To demonstrate the application of the system to controlling in vivo tissue development, the light inducible switch was used to control the expression of VEGF and angiopoietin-1, which induced angiogenic sprouting in a mouse dorsal window chamber model. Live intravital microscopy showed illumination-dependent increases in blood-perfused microvasculature. This optogenetic switch is broadly useful for applications in which sustained and patterned gene expression is desired following transient induction, including tissue engineering, gene therapy, synthetic biology, and fundamental studies of morphogenesis.
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Affiliation(s)
- Lauren R. Polstein
- Department of Biomedical
Engineering, Duke University, Durham, North Carolina 27708, United States
| | - Mark Juhas
- Department of Biomedical
Engineering, Duke University, Durham, North Carolina 27708, United States
| | - Gabi Hanna
- Department of Radiation Oncology and Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina 27710, United States
| | - Nenad Bursac
- Department of Biomedical
Engineering, Duke University, Durham, North Carolina 27708, United States
| | - Charles A. Gersbach
- Department of Biomedical
Engineering, Duke University, Durham, North Carolina 27708, United States
- Center for
Genomic and Computational Biology, Duke University, Durham, North Carolina 27708, United States
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina 27710, United States
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23
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Luo J, Torres‐Kolbus J, Liu J, Deiters A. Genetic Encoding of Photocaged Tyrosines with Improved Light‐Activation Properties for the Optical Control of Protease Function. Chembiochem 2017; 18:1442-1447. [DOI: 10.1002/cbic.201700147] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Ji Luo
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh Pennsylvania 15260 USA
| | - Jessica Torres‐Kolbus
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh Pennsylvania 15260 USA
| | - Jihe Liu
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh Pennsylvania 15260 USA
| | - Alexander Deiters
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh Pennsylvania 15260 USA
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24
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Wang J, Zheng S, Liu Y, Zhang Z, Lin Z, Li J, Zhang G, Wang X, Li J, Chen PR. Palladium-Triggered Chemical Rescue of Intracellular Proteins via Genetically Encoded Allene-Caged Tyrosine. J Am Chem Soc 2016; 138:15118-15121. [PMID: 27797486 DOI: 10.1021/jacs.6b08933] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Chemical de-caging has emerged as an attractive strategy for gain-of-function study of proteins via small-molecule reagents. The previously reported chemical de-caging reactions have been largely centered on liberating the side chain of lysine on a given protein. Herein, we developed an allene-based caging moiety and the corresponding palladium de-caging reagents for chemical rescue of tyrosine (Tyr) activity on intracellular proteins. This bioorthogonal de-caging pair has been successfully applied to unmask enzymatic Tyr sites (e.g., Y671 on Taq polymerase and Y728 on Anthrax lethal factor) as well as the post-translational Tyr modification site (Y416 on Src kinase) in vitro and in living cells. Our strategy provides a general platform for chemical rescue of Tyr-dependent protein activity inside cells.
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Affiliation(s)
- Jie Wang
- Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China.,Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China
| | - Siqi Zheng
- Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Yanjun Liu
- Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Zhaoyue Zhang
- Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Zhi Lin
- Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Jiaofeng Li
- Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Gong Zhang
- Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China.,Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China
| | - Xin Wang
- Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China.,Peking-Tsinghua Center for Life Sciences, Peking University , Beijing 100871, China
| | - Jie Li
- Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Peng R Chen
- Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China.,Peking-Tsinghua Center for Life Sciences, Peking University , Beijing 100871, China
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25
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Padilla MS, Farley CA, Chatkewitz LE, Young DD. Synthesis and incorporation of a caged tyrosine amino acid possessing a bioorthogonal handle. Tetrahedron Lett 2016; 57:4709-4712. [PMID: 28533567 PMCID: PMC5438197 DOI: 10.1016/j.tetlet.2016.09.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Reversing a bioconjugation in a spatial and temporal fashion has widespread applications, especially toward targeted drug delivery. We report the synthesis and incorporation of an unnatural amino acid with an alkyne modified dimethoxy-ortho-nitrobenzyl caging group. This unnatural amino acid can be utilized in a Glaser-Hay conjugation to generate a bioconjugate, but also is able to disrupt the bioconjugate when irradiated with light. These combined features allow for the preparation of bioconjugates with a high degree of site-specificity and allow for the separation of the two components if necessary.
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Affiliation(s)
- Marshall S Padilla
- Department of Chemistry, College of William & Mary, P.O. Box 8795, Williamsburg, VA 23187, USA
| | - Christopher A Farley
- Department of Chemistry, College of William & Mary, P.O. Box 8795, Williamsburg, VA 23187, USA
| | - Lindsay E Chatkewitz
- Department of Chemistry, College of William & Mary, P.O. Box 8795, Williamsburg, VA 23187, USA
| | - Douglas D Young
- Department of Chemistry, College of William & Mary, P.O. Box 8795, Williamsburg, VA 23187, USA
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26
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Zhou W, Deiters A. Conditional Control of CRISPR/Cas9 Function. Angew Chem Int Ed Engl 2016; 55:5394-9. [PMID: 26996256 DOI: 10.1002/anie.201511441] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 01/21/2016] [Indexed: 12/26/2022]
Abstract
The recently discovered CRISPR/Cas9 endonuclease system, comprised of a guide RNA for the recognition of a DNA target and the Cas9 nuclease protein for binding and processing the target, has been extensively studied and has been widely applied in genome editing, synthetic biology, and transcriptional modulation in cells and animals. Toward more precise genomic modification and further expansion of the CRISPR/Cas9 system as a spatiotemporally controlled gene regulatory system, several approaches of conditional activation of Cas9 function using small molecules and light have recently been developed. These methods have led to improvements in the genome editing specificity of the CRISPR/Cas9 system and enabled its activation with temporal and spatial precision.
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Affiliation(s)
- Wenyuan Zhou
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Alexander Deiters
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA.
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27
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Affiliation(s)
- Wenyuan Zhou
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
| | - Alexander Deiters
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
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28
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Brown KA, Deiters A. Genetic Code Expansion of Mammalian Cells with Unnatural Amino Acids. ACTA ACUST UNITED AC 2015; 7:187-199. [PMID: 26331526 DOI: 10.1002/9780470559277.ch150038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The expansion of the genetic code of mammalian cells enables the incorporation of unnatural amino acids into proteins. This is achieved by adding components to the protein biosynthetic machinery, specifically an engineered aminoacyl-tRNA synthetase/tRNA pair. The unnatural amino acids are chemically synthesized and supplemented to the growth medium. Using this methodology, fundamental new chemistries can be added to the functional repertoire of the genetic code of mammalian cells. This protocol outlines the steps necessary to incorporate a photocaged lysine into proteins and showcases its application in the optical triggering of protein translocation to the nucleus.
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Affiliation(s)
- Kalyn A Brown
- University of Pittsburgh, Department of Chemistry, Pittsburgh, Pennsylvania
| | - Alexander Deiters
- University of Pittsburgh, Department of Chemistry, Pittsburgh, Pennsylvania
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29
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Ravikumar Y, Nadarajan SP, Yoo TH, Lee CS, Yun H. Unnatural amino acid mutagenesis-based enzyme engineering. Trends Biotechnol 2015; 33:462-70. [PMID: 26088007 DOI: 10.1016/j.tibtech.2015.05.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 05/07/2015] [Accepted: 05/13/2015] [Indexed: 02/09/2023]
Abstract
Traditional enzyme engineering relies on substituting one amino acid by one of the other 19 natural amino acids to change the functional properties of an enzyme. However, incorporation of unnatural amino acids (UAAs) has been harnessed to engineer efficient enzymes for biocatalysis. Residue-specific and site-specific in vivo incorporation methods are becoming the preferred approach for producing enzymes with altered or improved functions. We describe the contribution of in vivo UAA incorporation methodologies to enzyme engineering as well as the future prospects for the field, including the integration of UAAs with other new advances in enzyme engineering.
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Affiliation(s)
- Yuvaraj Ravikumar
- School of Biotechnology, Department of Biochemistry, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, Korea
| | | | - Tae Hyeon Yoo
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea
| | - Chong-soon Lee
- School of Biotechnology, Department of Biochemistry, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, Korea
| | - Hyungdon Yun
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea.
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30
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Makhlynets OV, Raymond EA, Korendovych IV. Design of allosterically regulated protein catalysts. Biochemistry 2015; 54:1444-56. [PMID: 25642601 DOI: 10.1021/bi5015248] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Activity of allosteric protein catalysts is regulated by an external stimulus, such as protein or small molecule binding, light activation, pH change, etc., at a location away from the active site of the enzyme. Since its original introduction in 1961, the concept of allosteric regulation has undergone substantial expansion, and many, if not most, enzymes have been shown to possess some degree of allosteric regulation. The ability to create new catalysts that can be turned on and off using allosteric interactions would greatly expand the chemical biology toolbox and will allow for detection of environmental pollutants and disease biomarkers and facilitate studies of cellular processes and metal homeostasis. Thus, design of allosterically regulated protein catalysts represents an actively growing area of research. In this paper, we describe various approaches to achieving regulation of catalysis.
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Affiliation(s)
- Olga V Makhlynets
- Department of Chemistry, Syracuse University , 111 College Place, Syracuse, New York 13244, United States
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31
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Abstract
A 23-mer DNA “caged” at its 3′-terminus with a 9-anthracenyl moiety was prepared.
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Affiliation(s)
- A. Meyer
- Friedrich-Alexander-University of Erlangen-Nürnberg
- Department of Chemistry and Pharmacy
- Organic Chemistry Chair II
- 91054 Erlangen
- Germany
| | - Margot Schikora
- Friedrich-Alexander-University of Erlangen-Nürnberg
- Department of Chemistry and Pharmacy
- Organic Chemistry Chair II
- 91054 Erlangen
- Germany
| | - A. Mokhir
- Friedrich-Alexander-University of Erlangen-Nürnberg
- Department of Chemistry and Pharmacy
- Organic Chemistry Chair II
- 91054 Erlangen
- Germany
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32
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Sun F, Zhang L, Yan J, Xu L, Fang D, Luo SZ. The synthesis and photolysis mechanisms of 8-nitroquinoline-based photolabile caging groups for carboxylic acid. J PHYS ORG CHEM 2014. [DOI: 10.1002/poc.3385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Fude Sun
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology; Beijing University of Chemical Technology; Beijing 100029 China
| | - Lei Zhang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry; Beijing Normal University; Beijing 100875 China
| | - Jianhua Yan
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology; Beijing University of Chemical Technology; Beijing 100029 China
| | - Lida Xu
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology; Beijing University of Chemical Technology; Beijing 100029 China
| | - Decai Fang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry; Beijing Normal University; Beijing 100875 China
| | - Shi-Zhong Luo
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology; Beijing University of Chemical Technology; Beijing 100029 China
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33
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Asanuma H, Kashida H, Kamiya Y. De novo design of functional oligonucleotides with acyclic scaffolds. CHEM REC 2014; 14:1055-69. [PMID: 25171046 DOI: 10.1002/tcr.201402040] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Indexed: 01/20/2023]
Abstract
In this account, we demonstrate a new methodology for the de novo design of functional oligonucleotides with the acyclic scaffolds threoninol and serinol. Four functional motifs-wedge, interstrand-wedge, dimer, and cluster-have been prepared from natural DNA or RNA and functional base surrogates prepared from d-threoninol. The following applications of these motifs are described: (1) photoregulation of formation and dissociation of a DNA duplex modified with azobenzene, (2) sequence-specific detection of DNA using a fluorescent probe, (3) formation of fluorophore assemblies that mimic quantum dots, (4) improved strand selectivity of siRNA modified with a base surrogate, and (5) in vivo tracing of the RNAi pathway. Finally, we introduce artificial nucleic acids (XNAs) prepared from d-threoninol and serinol functionalized with each of the four nucleobases, which have unique properties compared with other acyclic XNAs. Functional oligonucleotides designed from acyclic scaffolds will be powerful tools for both DNA nanotechnology and biotechnology.
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Affiliation(s)
- Hiroyuki Asanuma
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.
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34
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Baker AS, Deiters A. Optical control of protein function through unnatural amino acid mutagenesis and other optogenetic approaches. ACS Chem Biol 2014; 9:1398-407. [PMID: 24819585 DOI: 10.1021/cb500176x] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Biological processes are naturally regulated with high spatial and temporal resolution at the molecular, cellular, and systems level. To control and study processes with the same resolution, light-sensitive groups and domains have been employed to optically activate and deactivate protein function. Optical control is a noninvasive technique in which the amplitude, wavelength, spatial location, and timing of the light illumination can be easily controlled. This review focuses on applications of genetically encoded unnatural amino acids containing light-removable protecting groups to optically trigger protein function, while also discussing select optogenetic approaches using natural light-sensitive domains to engineer optical control of biological processes.
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Affiliation(s)
- Austin S. Baker
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Alexander Deiters
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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35
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Uprety R, Luo J, Liu J, Naro Y, Samanta S, Deiters A. Genetic Encoding of Caged Cysteine and Caged Homocysteine in Bacterial and Mammalian Cells. Chembiochem 2014; 15:1793-9. [DOI: 10.1002/cbic.201400073] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Indexed: 12/19/2022]
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36
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Larson AS, Hergenrother PJ. Light activation of Staphylococcus aureus toxin YoeBSa1 reveals guanosine-specific endoribonuclease activity. Biochemistry 2013; 53:188-201. [PMID: 24279911 DOI: 10.1021/bi4008098] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The Staphylococcus aureus chromosome harbors two homologues of the YefM-YoeB toxin-antitoxin (TA) system. The toxins YoeBSa1 and YoeBSa2 possess ribosome-dependent ribonuclease (RNase) activity in Escherichia coli. This activity is similar to that of the E. coli toxin YoeBEc, an enzyme that, in addition to ribosome-dependent RNase activity, possesses ribosome-independent RNase activity in vitro. To investigate whether YoeBSa1 is also a ribosome-independent RNase, we expressed YoeBSa1 using a novel strategy and characterized its in vitro RNase activity, sequence specificity, and kinetics. Y88 of YoeBSa1 was critical for in vitro activity and cell culture toxicity. This residue was mutated to o-nitrobenzyl tyrosine (ONBY) via unnatural amino acid mutagenesis. YoeBSa1-Y88ONBY could be expressed in the absence of the antitoxin YefMSa1 in E. coli. Photocaged YoeBSa1-Y88ONBY displayed UV light-dependent RNase activity toward free mRNA in vitro. The in vitro ribosome-independent RNase activity of YoeBSa1-Y88ONBY, YoeBSa1-Y88F, and YoeBSa1-Y88TAG was significantly reduced or abolished. In contrast to YoeBEc, which cleaves RNA at both adenosine and guanosine with a preference for adenosine, YoeBSa1 cleaved mRNA specifically at guanosine. Using this information, a fluorometric assay was developed and used to determine the kinetic parameters for ribosome-independent RNA cleavage by YoeBSa1.
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Affiliation(s)
- Amy S Larson
- Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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37
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Liang X, Zhou M, Kato K, Asanuma H. Photoswitch nucleic acid catalytic activity by regulating topological structure with a universal supraphotoswitch. ACS Synth Biol 2013; 2:194-202. [PMID: 23656478 DOI: 10.1021/sb300120n] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
We demonstrated the generality of a strategy for photoswitching the activity of functional oligonucleotides by modulating their topological structure. Our strategy was proved to be versatile because it can be used to photoregulate functional oligonucleotides, e.g., ribozymes and DNAzymes, which have two binding arms and a catalytic loop. Repeated reversible photoregulation of RNA cleavage by a ribozyme or a DNAzyme was achieved by attaching two photoresponsive strands, artificial oligomers involving azobenzene moieties and nucleobases capable of forming a duplex as the supraphotoswitch. Individual strands were attached to the 3' and 5' ends of a RNA-cleavage oligonucleotide. Thus, the topological structure of the ribozyme or DNAzyme was constrained, and RNA cleavage was greatly suppressed when the supraphotoswitch duplex formed (OFF state). In contrast, RNA cleavage resumed when the supraphotoswitch duplex dissociated (ON state). Light irradiation was used to repeatedly switch the supraphotoswitch between the ON and OFF states so that RNA cleavage activity could be efficiently photoregulated. Analysis of the regulatory mechanism showed that topological constraints suppressed the RNA cleavage by causing both structural changes at the catalytic site and lower binding affinity between the RNA substrates and the functional oligonucleotides.
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Affiliation(s)
- Xingguo Liang
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8603,
Japan
- College of Food Science
and
Engineering, Ocean University of China,
Qingdao 266003, China
| | - Mengguang Zhou
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8603,
Japan
| | - Kenjiro Kato
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8603,
Japan
| | - Hiroyuki Asanuma
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8603,
Japan
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38
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Mitra N. Incorporating Unnatural Amino Acids into Recombinant Proteins in Living Cells. ACTA ACUST UNITED AC 2013. [DOI: 10.13070/mm.en.3.204] [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]
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39
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Wang Y, Wu L, Wang P, Lv C, Yang Z, Tang X. Manipulation of gene expression in zebrafish using caged circular morpholino oligomers. Nucleic Acids Res 2012; 40:11155-62. [PMID: 23002141 PMCID: PMC3505977 DOI: 10.1093/nar/gks840] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Morpholino oligomers (MOs) have been widely used to knock down specific genes in zebrafish, but their constitutive activities limit their experimental applications for studying a gene with multiple functions or within a gene network. We report herein a new design and synthesis of caged circular MOs (caged cMOs) with two ends linked by a photocleavable moiety. These caged cMOs were successfully used to photomodulate β-catenin-2 and no tail expression in zebrafish embryos.
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Affiliation(s)
- Yuan Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, No. 38, Xueyuan Road, Beijing 100191, China
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40
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Brieke C, Rohrbach F, Gottschalk A, Mayer G, Heckel A. Light-controlled tools. Angew Chem Int Ed Engl 2012; 51:8446-76. [PMID: 22829531 DOI: 10.1002/anie.201202134] [Citation(s) in RCA: 738] [Impact Index Per Article: 61.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Indexed: 12/21/2022]
Abstract
Spatial and temporal control over chemical and biological processes plays a key role in life, where the whole is often much more than the sum of its parts. Quite trivially, the molecules of a cell do not form a living system if they are only arranged in a random fashion. If we want to understand these relationships and especially the problems arising from malfunction, tools are necessary that allow us to design sophisticated experiments that address these questions. Highly valuable in this respect are external triggers that enable us to precisely determine where, when, and to what extent a process is started or stopped. Light is an ideal external trigger: It is highly selective and if applied correctly also harmless. It can be generated and manipulated with well-established techniques, and many ways exist to apply light to living systems--from cells to higher organisms. This Review will focus on developments over the last six years and includes discussions on the underlying technologies as well as their applications.
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Affiliation(s)
- Clara Brieke
- Goethe University Frankfurt, Institute for Organic Chemistry and Chemical Biology Buchmann Institute for Molecular Life Sciences, Max-von-Laue-Strasse 9, 60438 Frankfurt/Main, Germany
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41
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Brieke C, Rohrbach F, Gottschalk A, Mayer G, Heckel A. Lichtgesteuerte Werkzeuge. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201202134] [Citation(s) in RCA: 225] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Clara Brieke
- Goethe‐Universität Frankfurt, Institut für Organische Chemie und Chemische Biologie, Buchmann‐Institut für Molekulare Lebenswissenschaften, Max‐von‐Laue‐Straße 9, 60438 Frankfurt/Main (Deutschland)
| | - Falk Rohrbach
- Universität Bonn, LIMES‐Institut, Gerhard‐Domagk‐Straße 1, 53121 Bonn (Deutschland)
| | - Alexander Gottschalk
- Buchmann‐Institut für Molekulare Lebenswissenschaften, Institut für Biochemie, Max‐von‐Laue‐Straße 15, 60438 Frankfurt/Main (Deutschland)
| | - Günter Mayer
- Universität Bonn, LIMES‐Institut, Gerhard‐Domagk‐Straße 1, 53121 Bonn (Deutschland)
| | - Alexander Heckel
- Goethe‐Universität Frankfurt, Institut für Organische Chemie und Chemische Biologie, Buchmann‐Institut für Molekulare Lebenswissenschaften, Max‐von‐Laue‐Straße 9, 60438 Frankfurt/Main (Deutschland)
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42
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Murase S, Ishino S, Ishino Y, Tanaka T. Control of enzyme reaction by a designed metal-ion-dependent α-helical coiled-coil protein. J Biol Inorg Chem 2012; 17:791-9. [PMID: 22466407 DOI: 10.1007/s00775-012-0896-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Accepted: 03/20/2012] [Indexed: 01/01/2023]
Abstract
Regulation of protein function by external stimuli is a fascinating target for de novo design. We have constructed a peptide that assembles into a homotrimer in the presence of metal ions, such as Ni(2+), Cu(2+), and Zn(2+). We fused the peptide construct to the DNA-binding domain (DBD) of the heat shock factor from Saccharomyces cerevisiae, which binds tandem repeats of the heat shock element (HSE). However, the fusion protein bound to the natural three tandem HSEs even in the absence of metal ions, although mainly as the dimerized protein. Using "skipped" HSEs containing six additional nucleotides inserted between two adjacent HSEs, to prevent interactions between the DBDs, we found the fusion protein bound to the new DNA target in a metal-ion-dependent manner, as monitored by a HindIII protection assay. The fusion protein containing two metal binding sites in the metal-ion-controlled domain inhibited RNA transcription by T7 RNA polymerase in the presence of metal ions, in a template containing skipped HSEs downstream of the T7 promoter. The designed protein therefore regulates the functions of the enzyme in a metal-ion-dependent manner.
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Affiliation(s)
- Shigeo Murase
- Department of Material Sciences, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-chou, Nagoya, 466-8555, Japan
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43
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Chou C, Deiters A. Light-activated gene editing with a photocaged zinc-finger nuclease. Angew Chem Int Ed Engl 2011; 50:6839-42. [PMID: 21671316 PMCID: PMC3367882 DOI: 10.1002/anie.201101157] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Indexed: 12/31/2022]
Affiliation(s)
- Chungjung Chou
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204 (USA), Fax: (+1)919-515-5079
| | - Alexander Deiters
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204 (USA), Fax: (+1)919-515-5079
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44
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Chou C, Deiters A. Light-Activated Gene Editing with a Photocaged Zinc-Finger Nuclease. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201101157] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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45
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Killelea T, Connolly BA. Role of disulfide bridges in archaeal family-B DNA polymerases. Chembiochem 2011; 12:1330-6. [PMID: 21598372 DOI: 10.1002/cbic.201100145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Indexed: 11/09/2022]
Abstract
The family-B DNA polymerases obtained from the order Thermococcales, for example, Pyrococcus furiosus (Pfu-Pol) are commonly used in the polymerase chain reaction (PCR) because of their high thermostability and low error rates. Most of these polymerases contain four cysteines, arranged as two disulfide bridges. With Pfu-Pol C429-C443 forms one of the disulfides (DB1) and C507-C510 (DB2) the other. Although the disulfides are well conserved in the enzymes from the hyperthermophilic Thermococcales, they are less prevalent in euryarchaeal polymerases from other orders, and tend to be only found in other hyperthermophiles. Here, we report on the effects of deleting the disulfide bridges by mutating the relevant cysteines to serines. A variety of techniques, including differential scanning calorimetry and differential scanning fluorimetry, have shown that both disulfides make a contribution to thermostability, with DB1 being more important than DB2. However, even when both disulfides are removed, sufficient thermostability remains for normal (identical to the wild type) performance in PCR and quantitative (real-time) PCR. Therefore, polymerases totally lacking cysteine are fully compatible with most PCR-based applications. This observation opens the way to further engineering of polymerases by introduction of a single cysteine followed by appropriate chemical modification.
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Affiliation(s)
- Tom Killelea
- Institute of Cell and Molecular Biosciences (ICaMB), University of Newcastle, Newcastle upon Tyne, UK
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46
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Yu Z, Ho LY, Wang Z, Lin Q. Discovery of new photoactivatable diaryltetrazoles for photoclick chemistry via 'scaffold hopping'. Bioorg Med Chem Lett 2011; 21:5033-6. [PMID: 21570845 DOI: 10.1016/j.bmcl.2011.04.087] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Revised: 04/13/2011] [Accepted: 04/19/2011] [Indexed: 01/12/2023]
Abstract
We report the discovery of two long-wavelength (365 nm) photoactivatable diaryltetrazoles through screening a small library of diaryltetrazoles that were designed using a 'scaffold hopping' strategy. A naphthalene-derived tetrazole showed excellent reactivity in the photoinduced cycloaddition reaction with methyl methacrylate under 365 nm photoirradiation in acetonitrile PBS buffer mixture. Besides, the brightly fluorescent pyrazoline cycloadducts that were formed further increase the potential utility of these new diaryltetrazoles as 'photoclick' reagents and as reporters in biological studies.
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Affiliation(s)
- Zhipeng Yu
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260, USA
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47
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Silanskas A, Foss M, Wende W, Urbanke C, Lagunavicius A, Pingoud A, Siksnys V. Photocaged variants of the MunI and PvuII restriction enzymes. Biochemistry 2011; 50:2800-7. [PMID: 21410225 DOI: 10.1021/bi2000609] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Regulation of proteins by light is a new and promising strategy for the external control of biological processes. In this study, we demonstrate the ability to regulate the catalytic activity of the MunI and PvuII restriction endonucleases with light. We used two different approaches to attach a photoremovable caging compound, 2-nitrobenzyl bromide (NBB), to functionally important regions of the two enzymes. First, we covalently attached a caging molecule at the dimer interface of MunI to generate an inactive monomer. Second, we attached NBB at the DNA binding site of the single-chain variant of PvuII (scPvuII) to prevent binding and cleavage of the DNA substrate. Upon removal of the caging group by UV irradiation, nearly 50% of the catalytic activity of MunI and 80% of the catalytic activity of PvuII could be restored.
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Affiliation(s)
- Arunas Silanskas
- Institute of Biotechnology, Vilnius University, Graiciuno 8, LT-02241 Vilnius, Lithuania
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48
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Holzberger B, Marx A. Replacing 32 Proline Residues by a Noncanonical Amino Acid Results in a Highly Active DNA Polymerase. J Am Chem Soc 2010; 132:15708-13. [DOI: 10.1021/ja106525y] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bastian Holzberger
- Department of Chemistry and Konstanz Research School Chemical Biology, University of Konstanz, Universitätsstraβe 10, 78457 Konstanz, Germany
| | - Andreas Marx
- Department of Chemistry and Konstanz Research School Chemical Biology, University of Konstanz, Universitätsstraβe 10, 78457 Konstanz, Germany
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49
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Liu J, Castañeda CA, Wilkins BJ, Fushman D, Cropp TA. Condensed E. coli cultures for highly efficient production of proteins containing unnatural amino acids. Bioorg Med Chem Lett 2010; 20:5613-6. [PMID: 20805030 DOI: 10.1016/j.bmcl.2010.08.049] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2010] [Revised: 08/07/2010] [Accepted: 08/10/2010] [Indexed: 11/29/2022]
Abstract
Current biosynthetic methods for producing proteins containing site-specifically incorporated unnatural amino acids are inefficient because the majority of the amino acid goes unused. Here we present a universal approach to improve the efficiency of such processes using condensed Escherichia coli cultures.
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Affiliation(s)
- Jia Liu
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA
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50
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Riggsbee CW, Deiters A. Recent advances in the photochemical control of protein function. Trends Biotechnol 2010; 28:468-75. [PMID: 20667607 DOI: 10.1016/j.tibtech.2010.06.001] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Revised: 05/21/2010] [Accepted: 06/01/2010] [Indexed: 12/20/2022]
Abstract
Biological processes are regulated with a high level of spatial and temporal resolution. To understand and manipulate these processes, scientists need to be able to regulate them with Nature's level of precision. In this context, light is a unique regulatory element because it can be precisely controlled in terms of location, timing and amplitude. Moreover, most biological laboratories have a wide range of light sources as standard equipment. This review article summarizes the most recent advances in light-mediated regulation of protein function and its application in a cellular context. Specifically, the photocaging of small-molecule modulators of protein function and of specific amino acid residues in proteins is discussed. In addition, examples of the photochemical control of protein function through the application of genetically engineered natural-light receptors are presented.
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Affiliation(s)
- Chad W Riggsbee
- Department of Chemistry, North Carolina State University, Raleigh, NC 27607, USA
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