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Wu H, Sun Z, Li X. N,O-Benzylidene Acetal Dipeptides (NBDs) Enable the Synthesis of Difficult Peptides via a Kinked Backbone Strategy. Angew Chem Int Ed Engl 2023; 62:e202310624. [PMID: 37694822 DOI: 10.1002/anie.202310624] [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: 07/24/2023] [Revised: 09/05/2023] [Accepted: 09/11/2023] [Indexed: 09/12/2023]
Abstract
Proteins with highly hydrophobic regions or aggregation-prone sequences are typically difficult targets for chemical synthesis at the current stage, as obtaining such type of peptides via solid-phase peptide synthesis requires sophisticated operations. Herein, we report N,O-benzylidene acetal dipeptides (NBDs) as robust and effective building blocks to allow the direct synthesis of difficult peptides and proteins via a kinked backbone strategy. The effectiveness and easy accessibility of NBDs have been well demonstrated in our chemical syntheses of various challenging peptides and proteins, including chemokine, therapeutic hormones, histone, and glycosylated erythropoietin.
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Affiliation(s)
- Hongxiang Wu
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, P. R. China
| | - Zhenquan Sun
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, P. R. China
| | - Xuechen Li
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, P. R. China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
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2
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Manne SR, Rustler K, Bruckdorfer T, de la Torre BG, Albericio F. Incorporation of pseudoproline monomer (Fmoc-Thr[ψMe,Mepro]–OH) facilitates efficient solid-phase synthesis of difficult peptides. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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3
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Manne S, Chakraborty A, Rustler K, Bruckdorfer T, de la Torre BG, Albericio F. Solid-Phase Synthesis of an "Inaccessible" hGH-Derived Peptide Using a Pseudoproline Monomer and SIT-Protection for Cysteine. ACS OMEGA 2022; 7:28487-28492. [PMID: 35990446 PMCID: PMC9386842 DOI: 10.1021/acsomega.2c03261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The solid-phase peptide synthesis (SPPS) of the C-terminal sequence of hGH with one extra Tyr attached to its N-terminus (total of 16 residues with a disulfide bridge) has been accomplished for the first time by optimizing several synthetic parameters. First of all, the two Ser residues (positions 9 and 13 of the molecule) have been introduced as a single amino acid, Fmoc-Ser(ψMe,Mepro)-OH, demonstrating that the acylation of these hindered moieties is possible. This allows us to avoid the use of the corresponding dipeptides, Fmoc-AA-Ser(ψMe,Mepro)-OH, which are very often not commercially available or very costly. The second part of the sequence has been elongated via a double coupling approach using two of the most effective coupling methods (DIC-OxymaPure and HATU-DIEA). Finally, the disulfide bridging has been carried out very smoothly by a chemoselective thiol-disulfide interchange reaction between a SIT (sec-isoamyl mercaptan)-protected Cys residue and the free thiol of the second Cys. The synthesis of this short peptide has evidenced that SPPS is a multifactorial process which should be optimized in each case.
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Affiliation(s)
- Srinivasa
Rao Manne
- Peptide
Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Westville, 4000 Durban, South Africa
| | - Amit Chakraborty
- Peptide
Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Westville, 4000 Durban, South Africa
| | - Karin Rustler
- Iris
Biotech GmbH, Adalbert-Zoellner-Str. 1, 95615 Marktredwitz, Germany
| | - Thomas Bruckdorfer
- Iris
Biotech GmbH, Adalbert-Zoellner-Str. 1, 95615 Marktredwitz, Germany
| | - Beatriz G. de la Torre
- KwaZulu-Natal
Research Innovation and Sequencing Platform (KRISP), School of Laboratory
Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban 4041, South Africa
| | - Fernando Albericio
- Peptide
Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Westville, 4000 Durban, South Africa
- Institute
for Advanced Chemistry of Catalonia (IQAC-CSIC), 08034 Barcelona, Spain
- CIBER-BBN,
Networking Centre on Bioengineering, Biomaterials and Nanomedicine,
and Department of Organic Chemistry, University
of Barcelona, 08028 Barcelona, Spain
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4
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Scope and limitations of pseudoprolines as individual amino acids in peptide synthesis. Amino Acids 2021; 53:665-671. [PMID: 33813636 DOI: 10.1007/s00726-021-02973-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 03/26/2021] [Indexed: 01/19/2023]
Abstract
Protected 4-carboxyoxazolidines and thiazolidines (pseudoprolines) are derivatives of serine, threonine or cysteine amino acids. Such compounds are used in peptide synthesis among the other protected amino acids. They are usually practiced when a peptide sequence is readily aggregating during synthesis due to their ability to disrupt secondary structure formation. Such compounds are usually applied as dipeptides. In present work Fmoc-protected pseudoprolines were synthesized and applied in peptide synthesis not as dipeptides but as individual amino acids. Different acylation protocols and amino acids were tested to acylate pseudoprolines. Several "difficult" peptides were synthesized to confirm the efficacy of such constructions. It was shown that pseudoprolines could be easily synthesized and used in automated or manual synthesis not as dipeptides but as ordinary amino acids.
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Acosta GA, Murray L, Royo M, de la Torre BG, Albericio F. Solid-Phase Synthesis of Head to Side-Chain Tyr-Cyclodepsipeptides Through a Cyclative Cleavage From Fmoc-MeDbz/MeNbz-resins. Front Chem 2020; 8:298. [PMID: 32391324 PMCID: PMC7189019 DOI: 10.3389/fchem.2020.00298] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 03/25/2020] [Indexed: 12/16/2022] Open
Abstract
Cyclic depsipeptides constitute a fascinating class of natural products. Most of them are characterized by an ester formed between the β-hydroxy function of Ser/Thr -and related amino acids- and the carboxylic group of the C-terminal amino acid. Less frequent are those where the thiol of Cys is involved rendering a thioester (cyclo thiodepsipeptides) and even less common are the cyclo depsipeptides with a phenyl ester coming from the side-chain of Tyr. Herein, the preparation of the later through a cyclative cleavage using the Fmoc-MeDbz/MeNbz-resin is described. This resin has previously reported for the synthesis of cyclo thiodepsipeptides and homodetic peptides. The use of that resin for the preparation of all these peptides is also summarized.
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Affiliation(s)
- Gerardo A Acosta
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, University of Barcelona (UB), Barcelona, Spain.,Department of Organic Chemistry, University of Barcelona, Barcelona, Spain.,Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Spanish National Research Council (CSIC), Barcelona, Spain.,Associated Unit, Spanish National Research Council-University of Barcelona (CSIC-UB), Barcelona, Spain
| | - Laura Murray
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, University of Barcelona (UB), Barcelona, Spain.,Department of Organic Chemistry, University of Barcelona, Barcelona, Spain
| | - Miriam Royo
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Spanish National Research Council (CSIC), Barcelona, Spain.,Associated Unit, Spanish National Research Council-University of Barcelona (CSIC-UB), Barcelona, Spain
| | - Beatriz G de la Torre
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa.,Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
| | - Fernando Albericio
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, University of Barcelona (UB), Barcelona, Spain.,Department of Organic Chemistry, University of Barcelona, Barcelona, Spain.,Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Spanish National Research Council (CSIC), Barcelona, Spain.,Associated Unit, Spanish National Research Council-University of Barcelona (CSIC-UB), Barcelona, Spain.,Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
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Recent Advances in the Catalytic Synthesis of Imidazolidin-2-ones and Benzimidazolidin-2-ones. Catalysts 2019. [DOI: 10.3390/catal9010028] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
2-Imidazolidinone and its analogues are omnipresent structural motifs of pharmaceuticals, natural products, chiral auxiliaries, and intermediates in organic syntheses. Over the years, continuous efforts have been addressed to the development of sustainable and more efficient protocols for the synthesis of these heterocycles. This review gives a summary of the catalytic strategies to access imidazolidin-2-ones and benzimidazolidin-2-ones that have appeared in the literature from 2010 to 2018. Particularly important contributions beyond the timespan will be mentioned. The review is organized in four main chapters that identify the most common approaches to imidazolidin-2-one derivatives: (1) the direct incorporation of the carbonyl group into 1,2-diamines, (2) the diamination of olefins, (3) the intramolecular hydroamination of linear urea derivatives and (4) aziridine ring expansion. Methods not included in this classification will be addressed in the miscellaneous section.
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