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Chen H, Zhang Y, Wen Y, Fan X, Sciolino N, Lin Y, Breindel L, Dai Y, Shekhtman A, Xue XS, Zhang Q. Production of constrained L-cyclo-tetrapeptides by epimerization-resistant direct aminolysis. Nat Commun 2024; 15:5372. [PMID: 38918367 PMCID: PMC11199569 DOI: 10.1038/s41467-024-49329-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/30/2024] [Indexed: 06/27/2024] Open
Abstract
The synthesis of constrained 12-membered rings is notably difficult. The main challenges result from constraints during the linear peptide cyclization. Attempts to overcome constraints through excessive activation frequently cause peptidyl epimerization, while insufficient activation of the C-terminus hampers cyclization and promotes intermolecular oligomer formation. We present a β-thiolactone framework that enables the synthesis of cyclo-tetrapeptides via direct aminolysis. This tactic utilizes a mechanism that restricts C-terminal carbonyl rotation while maintaining high reactivity, thereby enabling efficient head-to-tail amidation, reducing oligomerization, and preventing epimerization. A broad range of challenging cyclo-tetrapeptides ( > 20 examples) are synthesized in buffer and exhibits excellent tolerance toward nearly all proteinogenic amino acids. Previously unattainable macrocycles, such as cyclo-L-(Pro-Tyr-Pro-Val), have been produced and identified as μ-opioid receptor (MOR) agonists, with an EC50 value of 2.5 nM. Non-epimerizable direct aminolysis offers a practical solution for constrained peptide cyclization, and the discovery of MOR agonist activity highlights the importance of overcoming synthetic challenges for therapeutic development.
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Affiliation(s)
- Huan Chen
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Yuchen Zhang
- Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, 200032, Shanghai, China
| | - Yuming Wen
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Xinhao Fan
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Nicholas Sciolino
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Yanyun Lin
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Leonard Breindel
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Yuanwei Dai
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA
| | - Alexander Shekhtman
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA.
| | - Xiao-Song Xue
- Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, 200032, Shanghai, China.
| | - Qiang Zhang
- Department of Chemistry, State University of New York, University at Albany, Albany, NY, 12222, USA.
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Kong Y, Yang X, Ding Q, Zhang YY, Sun BG, Chen HT, Sun Y. Comparison of non-volatile umami components in chicken soup and chicken enzymatic hydrolysate. Food Res Int 2017; 102:559-566. [PMID: 29195986 DOI: 10.1016/j.foodres.2017.09.038] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 08/27/2017] [Accepted: 09/12/2017] [Indexed: 11/19/2022]
Abstract
Umami taste is an important part to the taste of chicken. To isolate and identify non-volatile umami compounds, fractions from chicken soup and hydrolysate were prepared and analyzed. Amino acids were analyzed by amino acid analyzer. Organic acids and nucleotides were determined by ultra-performance liquid chromatography. Separation procedures utilizing ultrafiltration, Sephadex G-15 and reversed-phase high-performance liquid chromatography were used to isolate umami taste peptides. Combined with sensory evaluation and LC-Q-TOF-MS, the amino acid sequences of 12 oligopeptides were determined. The amount of taste compounds was higher in chicken enzymatic hydrolysate than that of chicken soup. Eight oligopeptides from chicken enzymatic hydrolysate were identified, including Ala-Asp, Ala-Met, His-Ser, Val-Glu, Ala-Glu, Asp-Ala-Gly, Glu-Asp and Ala-Glu-Ala. Four oligopeptides from chicken soup were identified, including Val-Thr, Ala-His, Ala-Phe and Thr-Glu.
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Affiliation(s)
- Yan Kong
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), Beijing 100048, China
| | - Xiao Yang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), Beijing 100048, China
| | - Qi Ding
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), Beijing 100048, China
| | - Yu-Yu Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), Beijing 100048, China.
| | - Bao-Guo Sun
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), Beijing 100048, China
| | - Hai-Tao Chen
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), Beijing 100048, China
| | - Ying Sun
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), Beijing 100048, China
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