1
|
Ludwig BA, Forbes CR, Zondlo NJ. N-Terminal Proline Editing for the Synthesis of Peptides with Mercaptoproline and Selenoproline: Mechanistic Insights Lead to Greater Efficiency in Proline Native Chemical Ligation. ACS Chem Biol 2024; 19:536-550. [PMID: 38324914 DOI: 10.1021/acschembio.3c00705] [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] [Indexed: 02/09/2024]
Abstract
Native chemical ligation (NCL) at proline has been limited by cost and synthetic access. In addition, prior examples of NCL using mercaptoproline have exhibited stalling of the reaction after thioester exchange, due to inefficient S → N acyl transfer. Herein, we develop methods, using inexpensive Boc-4R-hydroxyproline, for the solid-phase synthesis of peptides containing N-terminal 4R-mercaptoproline and 4R-selenoproline. The synthesis proceeds via proline editing on the N-terminus of fully synthesized peptides on the solid phase, converting an N-terminal Boc-4R-hydroxyproline to the 4S-bromoproline, followed by an SN2 reaction with potassium thioacetate or selenobenzoic acid. After cleavage from the resin and deprotection, peptides with functionalized N-terminal proline amino acids were obtained. NCL reactions with mercaptoproline proceeded slowly under standard NCL conditions, with the S-acyl transthioesterification intermediate observed as a major species. Computational investigations indicated that the bicyclic intermediates and transition states for S → N acyl transfer are sufficiently low in energy (10-15 kcal mol-1 above starting material) that ring strain cannot explain the slow S → N acyl transfer. Instead, the bicyclic zwitterionic tetrahedral intermediate has a low barrier for reversion to the S-acyl intermediate, causing reversion to the thioester (reverse reaction) to occur preferentially over elimination to generate the amide (forward reaction). We hypothesized that a buffer capable of general acid and/or general base catalysis could promote S → N acyl transfer and thus achieve greater efficiency in proline NCL. In the presence of 2 M imidazole at pH 6.8, NCL with mercaptoproline proceeded efficiently to generate the peptide with a native amide bond. NCL with selenoproline also proceeded efficiently to generate the desired products when a thiophenol thioester was employed as a ligation partner. After desulfurization or deselenization, the products obtained were identical to those synthesized directly, confirming that the solid-phase proline editing reactions proceeded stereospecifically and without epimerization.
Collapse
Affiliation(s)
- Brice A Ludwig
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Christina R Forbes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Neal J Zondlo
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| |
Collapse
|
2
|
Abstract
Deposits of the microtubule-associated protein Tau (MAPT) serve as a hallmark of neurodegenerative diseases known as tauopathies. Numerous studies have demonstrated that in diseases such as Alzheimer's disease (AD), Tau undergoes extensive remodeling. The attachment of post-translational modifications distributed throughout the entire sequence of the protein correlates with clinical presentation. A systematic examination of these protein alterations can shed light on their roles in both healthy and diseased states. However, the ability to access these modifications in the entire protein chain is limited as Tau can only be produced recombinantly or through semisynthesis. In this article, we describe the first chemical synthesis of the longest 2N4R isoform of Tau, consisting of 441 amino acids. The 2N4R Tau was divided into 3 major segments and a total of 11 fragments, all of which were prepared via solid-phase peptide synthesis. The successful chemical strategy has relied on the strategic use of two cysteine sites (C291 and C322) for the native chemical ligations (NCLs). This was combined with modern preparative protein chemistries, such as mercaptothreonine ligation (T205), diselenide-selenoester ligation (D358), and mutations of mercaptoamino acids into native residues via homogeneous radical desulfurization (A40, A77, A119, A157, A246, and A390). The successful completion of the synthesis has established a robust and scalable route to the native protein in multimilligram quantities and high purity. In broader terms, the presented strategy can be applied to the preparation of other shorter isoforms of Tau as well as to introduce all post-translational modifications that are characteristic of tauopathies such as AD.
Collapse
Affiliation(s)
- Wyatt C Powell
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Ruiheng Jing
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Maciej A Walczak
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| |
Collapse
|
3
|
Harel O, Jbara M. Chemical Synthesis of Bioactive Proteins. Angew Chem Int Ed Engl 2023; 62:e202217716. [PMID: 36661212 DOI: 10.1002/anie.202217716] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/18/2023] [Accepted: 01/20/2023] [Indexed: 01/21/2023]
Abstract
Nature has developed a plethora of protein machinery to operate and maintain nearly every task of cellular life. These processes are tightly regulated via post-expression modifications-transformations that modulate intracellular protein synthesis, folding, and activation. Methods to prepare homogeneously and precisely modified proteins are essential to probe their function and design new bioactive modalities. Synthetic chemistry has contributed remarkably to protein science by allowing the preparation of novel biomacromolecules that are often challenging or impractical to prepare via common biological means. The ability to chemically build and precisely modify proteins has enabled the production of new molecules with novel physicochemical properties and programmed activity for biomedical research, diagnostic, and therapeutic applications. This minireview summarizes recent developments in chemical protein synthesis to produce bioactive proteins, with emphasis on novel analogs with promising in vitro and in vivo activity.
Collapse
Affiliation(s)
- Omer Harel
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Muhammad Jbara
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
| |
Collapse
|
4
|
Landrieu I, Dupré E, Sinnaeve D, El Hajjar L, Smet-Nocca C. Deciphering the Structure and Formation of Amyloids in Neurodegenerative Diseases With Chemical Biology Tools. Front Chem 2022; 10:886382. [PMID: 35646824 PMCID: PMC9133342 DOI: 10.3389/fchem.2022.886382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 04/20/2022] [Indexed: 11/24/2022] Open
Abstract
Protein aggregation into highly ordered, regularly repeated cross-β sheet structures called amyloid fibrils is closely associated to human disorders such as neurodegenerative diseases including Alzheimer's and Parkinson's diseases, or systemic diseases like type II diabetes. Yet, in some cases, such as the HET-s prion, amyloids have biological functions. High-resolution structures of amyloids fibrils from cryo-electron microscopy have very recently highlighted their ultrastructural organization and polymorphisms. However, the molecular mechanisms and the role of co-factors (posttranslational modifications, non-proteinaceous components and other proteins) acting on the fibril formation are still poorly understood. Whether amyloid fibrils play a toxic or protective role in the pathogenesis of neurodegenerative diseases remains to be elucidated. Furthermore, such aberrant protein-protein interactions challenge the search of small-molecule drugs or immunotherapy approaches targeting amyloid formation. In this review, we describe how chemical biology tools contribute to new insights on the mode of action of amyloidogenic proteins and peptides, defining their structural signature and aggregation pathways by capturing their molecular details and conformational heterogeneity. Challenging the imagination of scientists, this constantly expanding field provides crucial tools to unravel mechanistic detail of amyloid formation such as semisynthetic proteins and small-molecule sensors of conformational changes and/or aggregation. Protein engineering methods and bioorthogonal chemistry for the introduction of protein chemical modifications are additional fruitful strategies to tackle the challenge of understanding amyloid formation.
Collapse
Affiliation(s)
- Isabelle Landrieu
- University Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related Diseases, Lille, France
- CNRS EMR9002 Integrative Structural Biology, Lille, France
| | - Elian Dupré
- University Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related Diseases, Lille, France
- CNRS EMR9002 Integrative Structural Biology, Lille, France
| | - Davy Sinnaeve
- University Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related Diseases, Lille, France
- CNRS EMR9002 Integrative Structural Biology, Lille, France
| | - Léa El Hajjar
- University Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related Diseases, Lille, France
- CNRS EMR9002 Integrative Structural Biology, Lille, France
| | - Caroline Smet-Nocca
- University Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related Diseases, Lille, France
- CNRS EMR9002 Integrative Structural Biology, Lille, France
| |
Collapse
|
5
|
Limorenko G, Lashuel HA. Revisiting the grammar of Tau aggregation and pathology formation: how new insights from brain pathology are shaping how we study and target Tauopathies. Chem Soc Rev 2021; 51:513-565. [PMID: 34889934 DOI: 10.1039/d1cs00127b] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Converging evidence continues to point towards Tau aggregation and pathology formation as central events in the pathogenesis of Alzheimer's disease and other Tauopathies. Despite significant advances in understanding the morphological and structural properties of Tau fibrils, many fundamental questions remain about what causes Tau to aggregate in the first place. The exact roles of cofactors, Tau post-translational modifications, and Tau interactome in regulating Tau aggregation, pathology formation, and toxicity remain unknown. Recent studies have put the spotlight on the wide gap between the complexity of Tau structures, aggregation, and pathology formation in the brain and the simplicity of experimental approaches used for modeling these processes in research laboratories. Embracing and deconstructing this complexity is an essential first step to understanding the role of Tau in health and disease. To help deconstruct this complexity and understand its implication for the development of effective Tau targeting diagnostics and therapies, we firstly review how our understanding of Tau aggregation and pathology formation has evolved over the past few decades. Secondly, we present an analysis of new findings and insights from recent studies illustrating the biochemical, structural, and functional heterogeneity of Tau aggregates. Thirdly, we discuss the importance of adopting new experimental approaches that embrace the complexity of Tau aggregation and pathology as an important first step towards developing mechanism- and structure-based therapies that account for the pathological and clinical heterogeneity of Alzheimer's disease and Tauopathies. We believe that this is essential to develop effective diagnostics and therapies to treat these devastating diseases.
Collapse
Affiliation(s)
- Galina Limorenko
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, École Polytechnique Federal de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
| | - Hilal A Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, École Polytechnique Federal de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
| |
Collapse
|
6
|
Moon SP, Balana AT, Pratt MR. Consequences of post-translational modifications on amyloid proteins as revealed by protein semisynthesis. Curr Opin Chem Biol 2021; 64:76-89. [PMID: 34175787 DOI: 10.1016/j.cbpa.2021.05.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/21/2021] [Accepted: 05/09/2021] [Indexed: 12/17/2022]
Abstract
Alterations to the global levels of certain types of post-translational modifications (PTMs) are commonly observed in neurodegenerative diseases. The net influence of these PTM changes to the progression of these diseases can be deduced from cellular and animal studies. However, at the molecular level, how one PTM influences a given protein is not uniform and cannot be easily generalized from systemic observations, thus requiring protein-specific interrogations. Given that protein aggregation is a shared pathological hallmark in neurodegeneration, it is important to understand how these PTMs affect the behavior of amyloid-forming proteins. For this purpose, protein semisynthesis techniques, largely via native chemical and expressed protein ligation, have been widely used. These approaches have thus far led to our increased understanding of the site-specific consequences of certain PTMs to amyloidogenic proteins' endogenous function, their propensity for aggregation, and the structural variations these PTMs induce toward the aggregates formed.
Collapse
Affiliation(s)
- Stuart P Moon
- Departments of Chemistry, University of Southern California, Los Angeles, CA, 90089, USA
| | - Aaron T Balana
- Departments of Chemistry, University of Southern California, Los Angeles, CA, 90089, USA
| | - Matthew R Pratt
- Departments of Chemistry, University of Southern California, Los Angeles, CA, 90089, USA; Biological Sciences, University of Southern California, Los Angeles, CA, 90089, USA.
| |
Collapse
|
7
|
Li S, Yi Y, Cui K, Zhang Y, Chen Y, Han D, Sun L, Zhang X, Chen F, Zhang Y, Yang Y. A Single-Chain Variable Fragment Antibody Inhibits Aggregation of Phosphorylated Tau and Ameliorates Tau Toxicity in vitro and in vivo. J Alzheimers Dis 2021; 79:1613-1629. [PMID: 33459708 DOI: 10.3233/jad-191266] [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] [Indexed: 11/15/2022]
Abstract
BACKGROUND Alzheimer's disease (AD) is a common cause of dementia among elderly people. Hyperphosphorylation and aggregation of tau correlates with the clinical progression of AD; therefore, therapies targeting the aggregation of tau may have potential applications for anti-AD drug development. Several inhibitors of tau aggregation, including small molecules and antibodies, have been found to decrease the aggregation of tau and the corresponding pathology. OBJECTIVE To screen one kind of single-chain variable fragment (scFv) antibody which could inhibit the aggregation of tau and ameliorate its cytotoxicity. METHODS/RESULTS Using phosphorylated tau (pTau) as an antigen, we obtained a scFv antibody via the screening of a high-capacity phage antibody library. Biochemical analysis revealed that this scFv antibody (scFv T1) had a strong ability to inhibit pTau aggregation both in dilute solutions and under conditions of macromolecular crowding. ScFv T1 could also depolymerize preformed pTau aggregates in vitro. Furthermore, scFv T1 was found to be able to inhibit the cytotoxicity of extracellular pTau aggregates and ameliorate tau-mediated toxicity when coexpressed with a hTauR406W mutant in the eye of transgenic Drosophila flies. CONCLUSION This scFv T1 antibody may be a potential new therapeutic agent against AD. Our methods can be used to develop novel strategies against protein aggregation for the treatment of neurodegenerative diseases.
Collapse
Affiliation(s)
- Sen Li
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Beijing Normal University, Gene engineering and Biotechnology Beijing Key Laboratory, National Demonstration Center for Experimental Life Sciences & Biotechnology Education, Beijing, P. R. China
| | - Yushan Yi
- Institute of Life Sciences, Fuzhou University, Fuzhou, Fujian Province, P. R.China
| | - Ke Cui
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Beijing Normal University, Gene engineering and Biotechnology Beijing Key Laboratory, National Demonstration Center for Experimental Life Sciences & Biotechnology Education, Beijing, P. R. China
| | - Yanqiu Zhang
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Beijing Normal University, Gene engineering and Biotechnology Beijing Key Laboratory, National Demonstration Center for Experimental Life Sciences & Biotechnology Education, Beijing, P. R. China
| | - Yange Chen
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Beijing Normal University, Gene engineering and Biotechnology Beijing Key Laboratory, National Demonstration Center for Experimental Life Sciences & Biotechnology Education, Beijing, P. R. China
| | - Dou Han
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Beijing Normal University, Gene engineering and Biotechnology Beijing Key Laboratory, National Demonstration Center for Experimental Life Sciences & Biotechnology Education, Beijing, P. R. China
| | - Ling Sun
- Institute of Life Sciences, Fuzhou University, Fuzhou, Fujian Province, P. R.China
| | - Xiaohui Zhang
- Institute of Life Sciences, Fuzhou University, Fuzhou, Fujian Province, P. R.China
| | - Fei Chen
- Institute of Life Sciences, Fuzhou University, Fuzhou, Fujian Province, P. R.China
| | - Yixin Zhang
- B CUBE Center for Molecular Bioengineering, Technische Universität Dresden, Dresden, Germany
| | - Yufeng Yang
- Institute of Life Sciences, Fuzhou University, Fuzhou, Fujian Province, P. R.China
| |
Collapse
|
8
|
Munari F, Barracchia CG, Franchin C, Parolini F, Capaldi S, Romeo A, Bubacco L, Assfalg M, Arrigoni G, D'Onofrio M. Semisynthetic and Enzyme‐Mediated Conjugate Preparations Illuminate the Ubiquitination‐Dependent Aggregation of Tau Protein. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Francesca Munari
- Department of BiotechnologyUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| | - Carlo G. Barracchia
- Department of BiotechnologyUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| | - Cinzia Franchin
- Department of Biomedical SciencesUniversity of Padova Padova Italy
- Proteomics CenterUniversity of Padova and Azienda Ospedaliera di Padova Padova Italy
| | - Francesca Parolini
- Department of BiotechnologyUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| | - Stefano Capaldi
- Department of BiotechnologyUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| | - Alessandro Romeo
- Department of Computer ScienceUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| | - Luigi Bubacco
- Department of BiologyUniversity of Padova Padova Italy
| | - Michael Assfalg
- Department of BiotechnologyUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| | - Giorgio Arrigoni
- Department of Biomedical SciencesUniversity of Padova Padova Italy
- Proteomics CenterUniversity of Padova and Azienda Ospedaliera di Padova Padova Italy
| | - Mariapina D'Onofrio
- Department of BiotechnologyUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| |
Collapse
|
9
|
Abstract
Protein semisynthesis-defined herein as the assembly of a protein from a combination of synthetic and recombinant fragments-is a burgeoning field of chemical biology that has impacted many areas in the life sciences. In this review, we provide a comprehensive survey of this area. We begin by discussing the various chemical and enzymatic methods now available for the manufacture of custom proteins containing noncoded elements. This section begins with a discussion of methods that are more chemical in origin and ends with those that employ biocatalysts. We also illustrate the commonalities that exist between these seemingly disparate methods and show how this is allowing for the development of integrated chemoenzymatic methods. This methodology discussion provides the technical foundation for the second part of the review where we cover the great many biological problems that have now been addressed using these tools. Finally, we end the piece with a short discussion on the frontiers of the field and the opportunities available for the future.
Collapse
Affiliation(s)
| | - Tom W. Muir
- Department of Chemistry, Princeton University, Frick Laboratory, Princeton, New Jersey 08544, United States
| |
Collapse
|
10
|
Haj‐Yahya M, Gopinath P, Rajasekhar K, Mirbaha H, Diamond MI, Lashuel HA. Site-Specific Hyperphosphorylation Inhibits, Rather than Promotes, Tau Fibrillization, Seeding Capacity, and Its Microtubule Binding. Angew Chem Int Ed Engl 2020; 59:4059-4067. [PMID: 31863676 PMCID: PMC7065254 DOI: 10.1002/anie.201913001] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 12/11/2019] [Indexed: 12/14/2022]
Abstract
The consistent observation of phosphorylated tau in the pathology of Alzheimer's disease has contributed to the emergence of a model where hyperphosphorylation triggers both tau disassociation from microtubules and its subsequent aggregation. Herein, we applied a total chemical synthetic approach to site-specifically phosphorylate the microtubule binding repeat domain of tau (K18) at single (pS356) or multiple (pS356/pS262 and pS356/pS262/pS258) residues. We show that hyperphosphorylation of K18 inhibits 1) its aggregation in vitro, 2) its seeding activity in cells, 3) its binding to microtubules, and 4) its ability to promote microtubule polymerization. The inhibition increased with increasing the number of phosphorylated sites, with phosphorylation at S262 having the strongest effect. Our results argue against the hyperphosphorylation hypothesis and underscore the importance of revisiting the role of site-specific hyperphosphorylation in regulating tau functions in health and disease.
Collapse
Affiliation(s)
- Mahmood Haj‐Yahya
- Laboratory of Molecular and Chemical Biology of NeurodegenerationBrain Mind InstituteFaculty of Life SciencesEcole Polytechnique Fédérale de Lausanne1015LausanneSwitzerland
| | - Pushparathinam Gopinath
- Laboratory of Molecular and Chemical Biology of NeurodegenerationBrain Mind InstituteFaculty of Life SciencesEcole Polytechnique Fédérale de Lausanne1015LausanneSwitzerland
- Current Address: Department of ChemistrySRM Institute of Science and TechnologyChennaiTamilNaduIndia
| | - Kolla Rajasekhar
- Laboratory of Molecular and Chemical Biology of NeurodegenerationBrain Mind InstituteFaculty of Life SciencesEcole Polytechnique Fédérale de Lausanne1015LausanneSwitzerland
| | - Hilda Mirbaha
- Center for Alzheimer's and Neurodegenerative DiseasesPeter O'Donnell Jr. Brain InstituteUniversity of Texas Southwestern Medical CenterDallasTX75390USA
| | - Marc I. Diamond
- Center for Alzheimer's and Neurodegenerative DiseasesPeter O'Donnell Jr. Brain InstituteUniversity of Texas Southwestern Medical CenterDallasTX75390USA
| | - Hilal A. Lashuel
- Laboratory of Molecular and Chemical Biology of NeurodegenerationBrain Mind InstituteFaculty of Life SciencesEcole Polytechnique Fédérale de Lausanne1015LausanneSwitzerland
| |
Collapse
|
11
|
Munari F, Barracchia CG, Franchin C, Parolini F, Capaldi S, Romeo A, Bubacco L, Assfalg M, Arrigoni G, D'Onofrio M. Semisynthetic and Enzyme‐Mediated Conjugate Preparations Illuminate the Ubiquitination‐Dependent Aggregation of Tau Protein. Angew Chem Int Ed Engl 2020; 59:6607-6611. [DOI: 10.1002/anie.201916756] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Francesca Munari
- Department of BiotechnologyUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| | - Carlo G. Barracchia
- Department of BiotechnologyUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| | - Cinzia Franchin
- Department of Biomedical SciencesUniversity of Padova Padova Italy
- Proteomics CenterUniversity of Padova and Azienda Ospedaliera di Padova Padova Italy
| | - Francesca Parolini
- Department of BiotechnologyUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| | - Stefano Capaldi
- Department of BiotechnologyUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| | - Alessandro Romeo
- Department of Computer ScienceUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| | - Luigi Bubacco
- Department of BiologyUniversity of Padova Padova Italy
| | - Michael Assfalg
- Department of BiotechnologyUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| | - Giorgio Arrigoni
- Department of Biomedical SciencesUniversity of Padova Padova Italy
- Proteomics CenterUniversity of Padova and Azienda Ospedaliera di Padova Padova Italy
| | - Mariapina D'Onofrio
- Department of BiotechnologyUniversity of Verona Strada Le Grazie 15 37134 Verona Italy
| |
Collapse
|
12
|
Haj‐Yahya M, Gopinath P, Rajasekhar K, Mirbaha H, Diamond MI, Lashuel HA. Site‐Specific Hyperphosphorylation Inhibits, Rather than Promotes, Tau Fibrillization, Seeding Capacity, and Its Microtubule Binding. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201913001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Mahmood Haj‐Yahya
- Laboratory of Molecular and Chemical Biology of Neurodegeneration Brain Mind Institute Faculty of Life Sciences Ecole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
| | - Pushparathinam Gopinath
- Laboratory of Molecular and Chemical Biology of Neurodegeneration Brain Mind Institute Faculty of Life Sciences Ecole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
- Current Address: Department of Chemistry SRM Institute of Science and Technology Chennai TamilNadu India
| | - Kolla Rajasekhar
- Laboratory of Molecular and Chemical Biology of Neurodegeneration Brain Mind Institute Faculty of Life Sciences Ecole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
| | - Hilda Mirbaha
- Center for Alzheimer's and Neurodegenerative Diseases Peter O'Donnell Jr. Brain Institute University of Texas Southwestern Medical Center Dallas TX 75390 USA
| | - Marc I. Diamond
- Center for Alzheimer's and Neurodegenerative Diseases Peter O'Donnell Jr. Brain Institute University of Texas Southwestern Medical Center Dallas TX 75390 USA
| | - Hilal A. Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration Brain Mind Institute Faculty of Life Sciences Ecole Polytechnique Fédérale de Lausanne 1015 Lausanne Switzerland
| |
Collapse
|
13
|
Ellmer D, Brehs M, Haj‐Yahya M, Lashuel HA, Becker CFW. Single Posttranslational Modifications in the Central Repeat Domains of Tau4 Impact its Aggregation and Tubulin Binding. Angew Chem Int Ed Engl 2019; 58:1616-1620. [PMID: 30549369 PMCID: PMC6391969 DOI: 10.1002/anie.201805238] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 10/29/2018] [Indexed: 12/22/2022]
Abstract
A variety of methods have been employed to study the impact of posttranslational modifications on Tau protein function. Here, a semisynthesis strategy is described that enables selective modification within the central repeat domain of Tau4 (residues 291-321), comprising a major interaction motive with tubulin as well as one of the key hexapeptides involved in Tau aggregation. This strategy has led to the preparation of four semisynthetic Tau variants with phosphoserine residues in different positions and one with a so far largely ignored carboxymethyllysine modification that results from a non-enzymatic posttranslational modification (nPTM). The latter modification inhibits tubulin polymerization but exhibits an aggregation behavior very similar to unmodified Tau. In contrast, phosphorylated Tau variants exhibit similar binding to tubulin as unmodified Tau4 but show lower tendencies to aggregate.
Collapse
Affiliation(s)
- Doris Ellmer
- University of ViennaFaculty of ChemistryInstitute of Biological ChemistryWähringer Str. 381090ViennaAustria
| | - Manuel Brehs
- University of ViennaFaculty of ChemistryInstitute of Biological ChemistryWähringer Str. 381090ViennaAustria
| | - Mahmood Haj‐Yahya
- École Polytechnique Fédérale de Lausanne (EPFL), Brain Mind InstituteLaboratory of Molecular and Chemical Biology of Neurodegeneration1015LausanneSwitzerland
| | - Hilal A. Lashuel
- École Polytechnique Fédérale de Lausanne (EPFL), Brain Mind InstituteLaboratory of Molecular and Chemical Biology of Neurodegeneration1015LausanneSwitzerland
| | - Christian F. W. Becker
- University of ViennaFaculty of ChemistryInstitute of Biological ChemistryWähringer Str. 381090ViennaAustria
| |
Collapse
|
14
|
Ellmer D, Brehs M, Haj‐Yahya M, Lashuel HA, Becker CFW. Single Posttranslational Modifications in the Central Repeat Domains of Tau4 Impact its Aggregation and Tubulin Binding. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201805238] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Doris Ellmer
- University of ViennaFaculty of ChemistryInstitute of Biological Chemistry Währinger Str. 38 1090 Vienna Austria
| | - Manuel Brehs
- University of ViennaFaculty of ChemistryInstitute of Biological Chemistry Währinger Str. 38 1090 Vienna Austria
| | - Mahmood Haj‐Yahya
- École Polytechnique Fédérale de Lausanne (EPFL), Brain Mind InstituteLaboratory of Molecular and Chemical Biology of Neurodegeneration 1015 Lausanne Switzerland
| | - Hilal A. Lashuel
- École Polytechnique Fédérale de Lausanne (EPFL), Brain Mind InstituteLaboratory of Molecular and Chemical Biology of Neurodegeneration 1015 Lausanne Switzerland
| | - Christian F. W. Becker
- University of ViennaFaculty of ChemistryInstitute of Biological Chemistry Währinger Str. 38 1090 Vienna Austria
| |
Collapse
|
15
|
van Ameijde J, Crespo R, Janson R, Juraszek J, Siregar B, Verveen H, Sprengers I, Nahar T, Hoozemans JJ, Steinbacher S, Willems R, Delbroek L, Borgers M, Dockx K, Van Kolen K, Mercken M, Pascual G, Koudstaal W, Apetri A. Enhancement of therapeutic potential of a naturally occurring human antibody targeting a phosphorylated Ser 422 containing epitope on pathological tau. Acta Neuropathol Commun 2018; 6:59. [PMID: 30001207 PMCID: PMC6042391 DOI: 10.1186/s40478-018-0562-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 06/28/2018] [Indexed: 11/24/2022] Open
Abstract
Aggregation of tau protein and spreading of tau aggregates are pivotal pathological processes in a range of neurological disorders. Accumulating evidence suggests that immunotherapy targeting tau may be a viable therapeutic strategy. We have previously described the isolation of antibody CBTAU-22.1 from the memory B-cell repertoire of healthy human donors. CBTAU-22.1 was shown to specifically bind a disease-associated phosphorylated epitope in the C-terminus of tau (Ser422) and to be able to inhibit the spreading of pathological tau aggregates from P301S spinal cord lysates in vitro, albeit with limited potency. Using a combination of rational design and random mutagenesis we have derived a variant antibody with improved affinity while maintaining the specificity of the parental antibody. This affinity improved antibody showed greatly enhanced potency in a cell-based immunodepletion assay using paired helical filaments (PHFs) derived from human Alzheimer’s disease (AD) brain tissue. Moreover, the affinity improved antibody limits the in vitro aggregation propensity of full length tau species specifically phosphorylated at position 422 produced by employing a native chemical ligation approach. Together, these results indicate that in addition to being able to inhibit the spreading of pathological tau aggregates, the matured antibody can potentially also interfere with the nucleation of tau which is believed to be the first step of the pathogenic process. Finally, the functionality in a P301L transgenic mice co-injection model highlights the therapeutic potential of human antibody dmCBTAU-22.1.
Collapse
|
16
|
Haj-Yahya M, Lashuel HA. Protein Semisynthesis Provides Access to Tau Disease-Associated Post-translational Modifications (PTMs) and Paves the Way to Deciphering the Tau PTM Code in Health and Diseased States. J Am Chem Soc 2018; 140:6611-6621. [DOI: 10.1021/jacs.8b02668] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Mahmood Haj-Yahya
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Hilal A. Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| |
Collapse
|
17
|
Abstract
Expressed protein ligation (EPL) is a valuable tool to study site-specific functionalities on proteins such as posttranslational modifications. The purification of such ligation products from EPL mixtures can be cumbersome due to a small size difference between the expressed protein portion and the desired ligated protein. Therefore, affinity tags are often required, which remain on the protein after purification. Herein, we present an efficient protocol to install a photocleavable biotin building block on synthetic C-terminal tau[390-441] and describe its use for purification of full-length semi-synthetic tau[1-441].
Collapse
Affiliation(s)
- Oliver Reimann
- Leibniz-Institute for Molecular Pharmacology (FMP), Robert-Roessle-Strasse 10, 13125, Berlin, Germany.
- Freie Universitaet Berlin, Institute for Chemistry und Biochemistry, Takustrasse 3, 14195, Berlin, Germany.
| | - Caroline Smet-Nocca
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, 59000, Lille, France
- Research Federation FraBio 3688, Villeneuve d'Ascq, France
| | - Christian P R Hackenberger
- Leibniz-Institute for Molecular Pharmacology (FMP), Robert-Roessle-Strasse 10, 13125, Berlin, Germany
- Department of Chemistry, Humboldt Universitaet zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| |
Collapse
|
18
|
Reimann O, Glanz M, Hackenberger CP. Native chemical ligation between asparagine and valine: Application and limitations for the synthesis of tri-phosphorylated C-terminal tau. Bioorg Med Chem 2015; 23:2890-4. [DOI: 10.1016/j.bmc.2015.03.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 03/05/2015] [Accepted: 03/10/2015] [Indexed: 12/29/2022]
|
19
|
Kuhlmann M, Reimann O, Hackenberger CPR, Groll J. Cysteine-Functional Polymers via Thiol-ene Conjugation. Macromol Rapid Commun 2015; 36:472-6. [DOI: 10.1002/marc.201400703] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 12/25/2014] [Indexed: 01/18/2023]
Affiliation(s)
- Matthias Kuhlmann
- Department for Functional Materials in Medicine and Dentistry; University of Würzburg; Pleicherwall 2 97070 Würzburg Germany
| | - Oliver Reimann
- Department Chemical Biology II; Leibniz-Institut für Molekulare Pharmakologie (FMP); Robert-Rössle-Strasse 10 13125 Berlin Germany
| | - Christian P. R. Hackenberger
- Department Chemical Biology II; Leibniz-Institut für Molekulare Pharmakologie (FMP); Robert-Rössle-Strasse 10 13125 Berlin Germany
- Department Chemie; Humboldt Universität zu Berlin; Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Jürgen Groll
- Department for Functional Materials in Medicine and Dentistry; University of Würzburg; Pleicherwall 2 97070 Würzburg Germany
| |
Collapse
|
20
|
Reimann O, Smet‐Nocca C, Hackenberger CPR. Spurlose Aufreinigung und Desulfurierung von Ligationsprodukten des Tau‐Proteins. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408674] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Oliver Reimann
- Leibniz‐Institut für Molekulare Pharmakologie (FMP), Robert‐Rössle‐Straße 10, 13125 Berlin (Deutschland)
- Humboldt Universität zu Berlin, Department Chemie, Brook‐Taylor‐Straße 2, 12489 Berlin (Deutschland)
- Freie Universität Berlin, Institut für Chemie und Biochemie, Takustraße 3, 14195 Berlin (Deutschland)
| | - Caroline Smet‐Nocca
- UMR CNRS 8576, Lille 1 Science and Technology University, 59655 Villeneuve d'Ascq Cedex (Frankreich)
| | - Christian P. R. Hackenberger
- Leibniz‐Institut für Molekulare Pharmakologie (FMP), Robert‐Rössle‐Straße 10, 13125 Berlin (Deutschland)
- Humboldt Universität zu Berlin, Department Chemie, Brook‐Taylor‐Straße 2, 12489 Berlin (Deutschland)
- Freie Universität Berlin, Institut für Chemie und Biochemie, Takustraße 3, 14195 Berlin (Deutschland)
| |
Collapse
|
21
|
Reimann O, Smet‐Nocca C, Hackenberger CPR. Traceless Purification and Desulfurization of Tau Protein Ligation Products. Angew Chem Int Ed Engl 2014; 54:306-10. [DOI: 10.1002/anie.201408674] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Indexed: 01/09/2023]
Affiliation(s)
- Oliver Reimann
- Leibniz‐Institut für Molekulare Pharmakologie (FMP), Robert‐Rössle‐Strasse 10, 13125 Berlin (Germany)
- Humboldt Universität zu Berlin, Department Chemie, Brook‐Taylor‐Strasse 2, 12489 Berlin (Germany)
- Freie Universität Berlin, Institut für Chemie und Biochemie, Takustrasse 3, 14195 Berlin (Germany)
| | - Caroline Smet‐Nocca
- UMR CNRS 8576—Lille 1 Science and Technology University, 59655 Villeneuve d'Ascq Cedex (France)
| | - Christian P. R. Hackenberger
- Leibniz‐Institut für Molekulare Pharmakologie (FMP), Robert‐Rössle‐Strasse 10, 13125 Berlin (Germany)
- Humboldt Universität zu Berlin, Department Chemie, Brook‐Taylor‐Strasse 2, 12489 Berlin (Germany)
- Freie Universität Berlin, Institut für Chemie und Biochemie, Takustrasse 3, 14195 Berlin (Germany)
| |
Collapse
|
22
|
Brister M, Pandey AK, Bielska AA, Zondlo NJ. OGlcNAcylation and phosphorylation have opposing structural effects in tau: phosphothreonine induces particular conformational order. J Am Chem Soc 2014; 136:3803-16. [PMID: 24559475 PMCID: PMC4004249 DOI: 10.1021/ja407156m] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Indexed: 01/12/2023]
Abstract
Phosphorylation and OGlcNAcylation are dynamic intracellular protein post-translational modifications that frequently are alternatively observed on the same serine and threonine residues. Phosphorylation and OGlcNAcylation commonly occur in natively disordered regions of proteins, and often have opposing functional effects. In the microtubule-associated protein tau, hyperphosphorylation is associated with protein misfolding and aggregation as the neurofibrillary tangles of Alzheimer's disease, whereas OGlcNAcylation stabilizes the soluble form of tau. A series of peptides derived from the proline-rich domain (residues 174-251) of tau was synthesized, with free Ser/Thr hydroxyls, phosphorylated Ser/Thr (pSer/pThr), OGlcNAcylated Ser/Thr, and diethylphosphorylated Ser/Thr. Phosphorylation and OGlcNAcylation were found by CD and NMR to have opposing structural effects on polyproline helix (PPII) formation, with phosphorylation favoring PPII, OGlcNAcylation opposing PPII, and the free hydroxyls intermediate in structure, and with phosphorylation structural effects greater than OGlcNAcylation. For tau196-209, phosphorylation and OGlcNAcylation had similar structural effects, opposing a nascent α-helix. Phosphomimic Glu exhibited PPII-favoring structural effects. Structural changes due to Thr phosphorylation were greater than those of Ser phosphorylation or Glu, with particular conformational restriction as the dianion, with mean (3)JαN = 3.5 Hz (pThr) versus 5.4 Hz (pSer), compared to 7.2, 6.8, and 6.2 Hz for Thr, Ser, and Glu, respectively, values that correlate with the backbone torsion angle ϕ. Dianionic phosphothreonine induced strong phosphothreonine amide protection and downfield amide chemical shifts (δmean = 9.63 ppm), consistent with formation of a stable phosphate-amide hydrogen bond. These data suggest potentially greater structural importance of threonine phosphorylation than serine phosphorylation due to larger induced structural effects.
Collapse
Affiliation(s)
| | | | - Agata A. Bielska
- Department of Chemistry and
Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Neal J. Zondlo
- Department of Chemistry and
Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| |
Collapse
|
23
|
Abstract
Post-translational modifications of proteins can have dramatic effect on the function of proteins. Significant research effort has gone into understanding the effect of particular modifications on protein parameters. In the present paper, I review some of the recently developed tools for the synthesis of proteins modified with single post-translational modifications at specific sites in the protein, such as amber codon suppression technologies, tag and modify, and native chemical ligation.
Collapse
|
24
|
ORCHEM-Preis für Nachwuchswissenschaftler: C. P. R. Hackenberger und A. Jacobi von Wangelin / Teva Pharmaceuticals Scholar Grant: P. S. Baran / Roche Excellence in Chemistry Award: N. Garg und A. Doyle. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201207226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
25
|
ORCHEM Prize for Young Investigators: C. P. R. Hackenberger and A. Jacobi von Wangelin / Teva Pharmaceuticals Scholar Grant: P. S. Baran / Roche Excellence in Chemistry Award: N. Garg and A. Doyle. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/anie.201207226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
26
|
Abstract
We describe our efforts to combine in vitro enzymatic reactions with recombinant kinases to phosphorylate the neuronal tau protein, and NMR spectroscopy to unravel the resulting phosphorylation pattern in both qualitative and quantitative manners. This approach, followed by functional assays with the same samples, gives access to the complex phosphorylation code of tau. As a result, we propose a novel hypothesis for the link between tau (hyper)phosphorylation and aggregation.
Collapse
|
27
|
Ito Y. Elaborate Synthesis of Biological Macromolecules. Chembiochem 2012; 13:1100-2. [DOI: 10.1002/cbic.201200183] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Indexed: 11/10/2022]
|
28
|
Hejjaoui M, Butterfield S, Fauvet B, Vercruysse F, Cui J, Dikiy I, Prudent M, Olschewski D, Zhang Y, Eliezer D, Lashuel HA. Elucidating the role of C-terminal post-translational modifications using protein semisynthesis strategies: α-synuclein phosphorylation at tyrosine 125. J Am Chem Soc 2012; 134:5196-210. [PMID: 22339654 PMCID: PMC3592575 DOI: 10.1021/ja210866j] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Despite increasing evidence that supports the role of different post-translational modifications (PTMs) in modulating α-synuclein (α-syn) aggregation and toxicity, relatively little is known about the functional consequences of each modification and whether or not these modifications are regulated by each other. This lack of knowledge arises primarily from the current lack of tools and methodologies for the site-specific introduction of PTMs in α-syn. More specifically, the kinases that mediate selective and efficient phosphorylation of C-terminal tyrosine residues of α-syn remain to be identified. Unlike phospho-serine and phospho-threonine residues, which in some cases can be mimicked by serine/threonine → glutamate or aspartate substitutions, there are no natural amino acids that can mimic phospho-tyrosine. To address these challenges, we developed a general and efficient semisynthetic strategy that enables the site-specific introduction of single or multiple PTMs and the preparation of homogeneously C-terminal modified forms of α-syn in milligram quantities. These advances have allowed us to investigate, for the first time, the effects of selective phosphorylation at Y125 on the structure, aggregation, membrane binding, and subcellular localization of α-syn. The development of semisynthetic methods for the site-specific introduction of single or PTMs represents an important advance toward determining the roles of such modifications in α-syn structure, aggregation, and functions in heath and disease.
Collapse
Affiliation(s)
- Mirva Hejjaoui
- Laboratory of molecular and chemical biology of neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Sara Butterfield
- Laboratory of molecular and chemical biology of neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Bruno Fauvet
- Laboratory of molecular and chemical biology of neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Filip Vercruysse
- Laboratory of molecular and chemical biology of neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Jia Cui
- Laboratory of Neurobiology and State Key Laboratory of Biomembrane and Membrane Biotechnology, College of Life Sciences, Peking University, Beijing, China
| | - Igor Dikiy
- Department of Biochemistry and Program in Structural Biology, Weill Cornell Medical College, New York, New York 10021, USA
| | - Michel Prudent
- Laboratory of molecular and chemical biology of neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Diana Olschewski
- Laboratory of molecular and chemical biology of neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Yan Zhang
- Laboratory of Neurobiology and State Key Laboratory of Biomembrane and Membrane Biotechnology, College of Life Sciences, Peking University, Beijing, China
| | - David Eliezer
- Department of Biochemistry and Program in Structural Biology, Weill Cornell Medical College, New York, New York 10021, USA
| | - Hilal A. Lashuel
- Laboratory of molecular and chemical biology of neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| |
Collapse
|
29
|
Siman P, Brik A. Chemical and semisynthesis of posttranslationally modified proteins. Org Biomol Chem 2012; 10:5684-97. [DOI: 10.1039/c2ob25149c] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|