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Gugkaeva ZT, Mardiyan ZZ, Smol'yakov AF, Poghosyan AS, Saghyan AS, Maleev VI, Larionov VA. Sequential Heck Cross-Coupling and Hydrothiolation Reactions Taking Place in the Ligand Sphere of a Chiral Dehydroalanine Ni(II) Complex: Asymmetric Route to β-Aryl Substituted Cysteines. Org Lett 2022; 24:6230-6235. [PMID: 35950978 DOI: 10.1021/acs.orglett.2c02591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A practically useful protocol for the asymmetric synthesis of artificial β-aryl-substituted cysteine derivatives was developed through sequential Pd(II)-catalyzed Heck cross-coupling with aryl iodides and hydrothiolation reaction with various alkyl thiols in the presence of triethylamine taking place in the ligand sphere of a robust and bench-stable chiral dehydroalanine Ni(II) complex. The subsequent acidic decomposition of the single diastereomeric Ni(II) complexes led to the target enantiopure cysteine derivatives.
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Affiliation(s)
- Zalina T Gugkaeva
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilov Str. 28, 119991 Moscow, Russian Federation
| | - Zorayr Z Mardiyan
- SPC "Armbiotechnology" SNPO NAS RA, Gyurjyan Str. 14, 0056 Yerevan, Armenia
| | - Alexander F Smol'yakov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilov Str. 28, 119991 Moscow, Russian Federation.,Plekhanov Russian University of Economics, Stremyanny Per. 36, 117997 Moscow, Russian Federation
| | | | - Ashot S Saghyan
- SPC "Armbiotechnology" SNPO NAS RA, Gyurjyan Str. 14, 0056 Yerevan, Armenia
| | - Victor I Maleev
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilov Str. 28, 119991 Moscow, Russian Federation
| | - Vladimir A Larionov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilov Str. 28, 119991 Moscow, Russian Federation.,Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya Str. 6, 117198 Moscow, Russian Federation
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2
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Engelhardt DB, Donnelly BL, Beadle J, van Belkum MJ, Vederas JC. Ring-opening reactions for the solid-phase synthesis of nisin lipopeptide analogues. Org Biomol Chem 2022; 20:8988-8999. [DOI: 10.1039/d2ob01526a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Strategy for the solid-phase synthesis of nisin lipopeptide analogues using orthogonally protected lanthionines synthesised by ring-opening chemistry, and on-resin formation of dehydroalanine and dehydrobutyrine residues.
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Affiliation(s)
- Daniel B. Engelhardt
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Bethan L. Donnelly
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Jonathan Beadle
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Marco J. van Belkum
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - John C. Vederas
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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3
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Abstract
RNA is a versatile biomolecule with a broad range of biological functions that go far beyond its initially described role as a simple information carrier. The development of chemical methods to control, manipulate and modify RNA has the potential to yield new insights into its many functions and properties. Traditionally, most of these methods involved the chemical modification of RNA structure using solid-state synthesis or enzymatic transformations. However, over the past 15 years, the direct functionalization of RNA by selective acylation of the 2'-hydroxyl (2'-OH) group has emerged as a powerful alternative that enables the simple modification of both synthetic and transcribed RNAs. In this Review, we discuss the chemical properties and design of effective reagents for RNA 2'-OH acylation, highlighting the unique problem of 2'-OH reactivity in the presence of water. We elaborate on how RNA 2'-OH acylation is being exploited to develop selective chemical probes that enable interrogation of RNA structure and function, and describe new developments and applications in the field.
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4
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Compañón I, Guerreiro A, Mangini V, Castro-López J, Escudero-Casao M, Avenoza A, Busto JH, Castillón S, Jiménez-Barbero J, Asensio JL, Jiménez-Osés G, Boutureira O, Peregrina JM, Hurtado-Guerrero R, Fiammengo R, Bernardes GJL, Corzana F. Structure-Based Design of Potent Tumor-Associated Antigens: Modulation of Peptide Presentation by Single-Atom O/S or O/Se Substitutions at the Glycosidic Linkage. J Am Chem Soc 2019; 141:4063-4072. [PMID: 30726084 DOI: 10.1021/jacs.8b13503] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
GalNAc-glycopeptides derived from mucin MUC1 are an important class of tumor-associated antigens. α- O-glycosylation forces the peptide to adopt an extended conformation in solution, which is far from the structure observed in complexes with a model anti-MUC1 antibody. Herein, we propose a new strategy for designing potent antigen mimics based on modulating peptide/carbohydrate interactions by means of O → S/Se replacement at the glycosidic linkage. These minimal chemical modifications bring about two key structural changes to the glycopeptide. They increase the carbohydrate-peptide distance and change the orientation and dynamics of the glycosidic linkage. As a result, the peptide acquires a preorganized and optimal structure suited for antibody binding. Accordingly, these new glycopeptides display improved binding toward a representative anti-MUC1 antibody relative to the native antigens. To prove the potential of these glycopeptides as tumor-associated MUC1 antigen mimics, the derivative bearing the S-glycosidic linkage was conjugated to gold nanoparticles and tested as an immunogenic formulation in mice without any adjuvant, which resulted in a significant humoral immune response. Importantly, the mice antisera recognize cancer cells in biopsies of breast cancer patients with high selectivity. This finding demonstrates that the antibodies elicited against the mimetic antigen indeed recognize the naturally occurring antigen in its physiological context. Clinically, the exploitation of tumor-associated antigen mimics may contribute to the development of cancer vaccines and to the improvement of cancer diagnosis based on anti-MUC1 antibodies. The methodology presented here is of general interest for applications because it may be extended to modulate the affinity of biologically relevant glycopeptides toward their receptors.
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Affiliation(s)
- Ismael Compañón
- Departamento de Química , Universidad de La Rioja , Centro de Investigación en Síntesis Química , 26006 Logroño , Spain
| | - Ana Guerreiro
- Instituto de Medicina Molecular, Faculdade de Medicina , Universidade de Lisboa , Avenida Professor Egas Moniz , 1649-028 Lisboa , Portugal
| | - Vincenzo Mangini
- Center for Biomolecular Nanotechnologies@UniLe , Istituto Italiano di Tecnologia (IIT) , 73010 Arnesano , Lecce , Italy
| | - Jorge Castro-López
- Institute of Biocomputation and Physics of Complex Systems (BIFI) , University of Zaragoza , BIFI-IQFR (CSIC), Fundación ARAID , 50018 Zaragoza , Spain
| | - Margarita Escudero-Casao
- Departament de Química Analítica i Química Orgànica, Facultat de Química , Universitat Rovira i Virgili , 43007 Tarragona , Spain
| | - Alberto Avenoza
- Departamento de Química , Universidad de La Rioja , Centro de Investigación en Síntesis Química , 26006 Logroño , Spain
| | - Jesús H Busto
- Departamento de Química , Universidad de La Rioja , Centro de Investigación en Síntesis Química , 26006 Logroño , Spain
| | - Sergio Castillón
- Departament de Química Analítica i Química Orgànica, Facultat de Química , Universitat Rovira i Virgili , 43007 Tarragona , Spain
| | - Jesús Jiménez-Barbero
- CIC bioGUNE , Bizkaia Technology Park , Building 801A , 48170 Derio , Spain.,Ikerbasque , Basque Foundation for Science , Maria Diaz de Haro 13 , 48009 Bilbao , Spain.,Department of Organic Chemistry II, Faculty of Science & Technology , University of the Basque Country , 48940 Leioa , Spain
| | - Juan L Asensio
- Instituto de Química Orgánica General , IQOG-CSIC , 28006 Madrid , Spain
| | - Gonzalo Jiménez-Osés
- Departamento de Química , Universidad de La Rioja , Centro de Investigación en Síntesis Química , 26006 Logroño , Spain.,CIC bioGUNE , Bizkaia Technology Park , Building 801A , 48170 Derio , Spain
| | - Omar Boutureira
- Departament de Química Analítica i Química Orgànica, Facultat de Química , Universitat Rovira i Virgili , 43007 Tarragona , Spain
| | - Jesús M Peregrina
- Departamento de Química , Universidad de La Rioja , Centro de Investigación en Síntesis Química , 26006 Logroño , Spain
| | - Ramón Hurtado-Guerrero
- Institute of Biocomputation and Physics of Complex Systems (BIFI) , University of Zaragoza , BIFI-IQFR (CSIC), Fundación ARAID , 50018 Zaragoza , Spain
| | - Roberto Fiammengo
- Center for Biomolecular Nanotechnologies@UniLe , Istituto Italiano di Tecnologia (IIT) , 73010 Arnesano , Lecce , Italy
| | - Gonçalo J L Bernardes
- Instituto de Medicina Molecular, Faculdade de Medicina , Universidade de Lisboa , Avenida Professor Egas Moniz , 1649-028 Lisboa , Portugal.,Department of Chemistry , University of Cambridge , Lensfield Road , CB2 1EW Cambridge , U.K
| | - Francisco Corzana
- Departamento de Química , Universidad de La Rioja , Centro de Investigación en Síntesis Química , 26006 Logroño , Spain
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6
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Kusen PM, Wandrey G, Probst C, Grünberger A, Holz M, Meyer zu Berstenhorst S, Kohlheyer D, Büchs J, Pietruszka J. Optogenetic Regulation of Tunable Gene Expression in Yeast Using Photo-Labile Caged Methionine. ACS Chem Biol 2016; 11:2915-2922. [PMID: 27570879 DOI: 10.1021/acschembio.6b00462] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Light-mediated gene expression enables the noninvasive regulation of cellular functions. Apart from their classical application of regulating single cells with high spatiotemporal resolution, we highlight the potential of light-mediated gene expression for biotechnological issues. Here, we demonstrate the first light-mediated gene regulation in Saccharomyces cerevisiae using the repressible pMET17 promoter and the photolabile NVOC methionine that releases methionine upon irradiation with UVA light. In this system, the expression can be repressed upon irradiation and is reactivated due to consumption of methionine. The photolytic release allows precise control over the methionine concentration and therefore over the repression duration. Using this light regulation mechanism, we were able to apply an in-house constructed 48-well cultivation system which allows parallelized and automated irradiation programs as well as online detection of fluorescence and growth. This system enables screening of multiple combinations of several repression/derepression intervals to realize complex expression programs (e.g., a stepwise increase of temporally constant expression levels, linear expression rates with variable slopes, and accurate control over the expression induction, although we used a repressible promoter.) Thus, we were able to control all general parameters of a gene expression experiment precisely, namely start, pause, and stop at desired time points, as well as the ongoing expression rate. Furthermore, we gained detailed insights into single-cell expression dynamics with spatiotemporal resolution by applying microfluidics cultivation technology combined with fluorescence time-lapse microscopy.
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Affiliation(s)
- Peter M. Kusen
- Institute
for Bioorganic Chemistry, Heinrich Heine University Düsseldorf at the Forschungszentrum Jülich, 52426 Jülich, Germany
| | - Georg Wandrey
- AVT
− Biochemical Engineering, RWTH Aachen University, Worringer
Weg 1, 52074 Aachen, Germany
| | - Christopher Probst
- Institute
of Bio- and Geosciences (IBG-1: Biotechnology), Forschungszentrum Jülich GmbH, 52426 Jülich, Germany
| | - Alexander Grünberger
- Institute
of Bio- and Geosciences (IBG-1: Biotechnology), Forschungszentrum Jülich GmbH, 52426 Jülich, Germany
| | - Martina Holz
- Institute
for Bioorganic Chemistry, Heinrich Heine University Düsseldorf at the Forschungszentrum Jülich, 52426 Jülich, Germany
| | - Sonja Meyer zu Berstenhorst
- Institute
for Bioorganic Chemistry, Heinrich Heine University Düsseldorf at the Forschungszentrum Jülich, 52426 Jülich, Germany
| | - Dietrich Kohlheyer
- Institute
of Bio- and Geosciences (IBG-1: Biotechnology), Forschungszentrum Jülich GmbH, 52426 Jülich, Germany
| | - Jochen Büchs
- AVT
− Biochemical Engineering, RWTH Aachen University, Worringer
Weg 1, 52074 Aachen, Germany
| | - Jörg Pietruszka
- Institute
for Bioorganic Chemistry, Heinrich Heine University Düsseldorf at the Forschungszentrum Jülich, 52426 Jülich, Germany
- Institute
of Bio- and Geosciences (IBG-1: Biotechnology), Forschungszentrum Jülich GmbH, 52426 Jülich, Germany
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9
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Chen S, Wang L, Fahmi NE, Benkovic SJ, Hecht SM. Two pyrenylalanines in dihydrofolate reductase form an excimer enabling the study of protein dynamics. J Am Chem Soc 2012; 134:18883-5. [PMID: 23116258 DOI: 10.1021/ja307179q] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Because of the lack of sensitivity to small changes in distance by available FRET pairs (a constraint imposed by the dimensions of the enzyme), a DHFR containing two pyrene moieties was prepared to enable the observation of excimer formation. Pyren-1-ylalanine was introduced into DHFR positions 16 and 49 using an in vitro expression system in the presence of pyren-1-ylalanyl-tRNA(CUA). Excimer formation (λ(ex) 342 nm; λ(em) 481 nm) was observed in the modified DHFR, which retained its catalytic competence and was studied under multiple and single turnover conditions. The excimer appeared to follow a protein conformational change after the H transfer involving the relative position and orientation of the pyrene moieties and is likely associated with product dissociation.
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Affiliation(s)
- Shengxi Chen
- Center for BioEnergetics, Biodesign Institute, and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, USA
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