youth-lab-peptides-reload-mask The total synthesis of mersacidin, a potent lantibiotic peptide, represents a significant challenge and achievement in medicinal chemistry. Mersacidin, produced by *Bacillus* species, is known for its antimicrobial activity, particularly against Gram-positive bacteria, by inhibiting peptidoglycan biosynthesis. The complexity of mersacidin's structure, including its multiple thioether rings formed by lanthionine residues, necessitates advanced synthetic strategies. Solid-phase peptide synthesis (SPPS) has emerged as a cornerstone technique for tackling such intricate peptide total syntheses, offering a practical and efficient route to construct these complex molecules.作者：NA Santos-Filho·2015·被引用次数：57—Usingsolid-phase peptide synthesis(SPPS), this work aimed to synthesize the peptide derived from the C-terminal region of Bothropstoxin-I ( ...
Mersacidin belongs to the class II lanthipeptides, characterized by their ribosomally synthesized and post-translationally modified nature. Its mechanism of action involves binding to Lipid II, a crucial precursor in bacterial cell wall biosynthesis, thereby preventing the transglycosylation step. This targeted disruption makes mersacidin a valuable candidate for developing new antimicrobial agents, especially in the face of rising antibiotic resistance.作者：RS Narayan·2005·被引用次数：87—As part of our research effort directed toward thesynthesisand mechanistic study of the lantibioticpeptide mersacidin(1), we report stereoselective ... The chemical synthesis of mersacidin and its analogues allows for detailed structure-activity relationship studies, aiding in the design of more potent and specific therapeutic compounds.
Solid-phase peptide synthesis (SPPS) revolutionized peptide chemistry by immobilizing the growing peptide chain to a solid support, typically a resin. This approach simplifies purification, as excess reagents and byproducts can be washed away after each coupling step. For complex peptides like mersacidin, SPPS offers several advantages:
* Efficiency: Sequential addition of amino acids allows for the controlled assembly of the peptide chain.
* Automation: SPPS is amenable to automation, which can increase reproducibility and throughput.
* Versatility: Various protecting group strategies and coupling reagents can be employed to accommodate diverse amino acid side chains and challenging couplings.
* Scalability: While initial syntheses might be on a small scale, SPPS methodologies can be adapted for larger-scale production.
The application of SPPS in the total synthesis of mersacidin involves carefully orchestrated steps of amino acid coupling, deprotection, and cleavage from the solid support.Mersacidinis defined as a subtype of lantibiotic synthesized by bacillus species, which acts against multiple Gram-positive bacteria by disrupting cell-wall ... The introduction of modified amino acids, such as those involved in lanthionine formation, requires specialized reagents and strategies within the SPPS frameworkMersacidin - an overview.
The total synthesis of mersacidin is fraught with challenges due to its unique structural features:
* Lanthionine Rings: The formation of multiple lanthionine thioether bridges is a defining characteristic of mersacidin. These cyclic structures require specific cyclization chemistries, often involving dehydration and nucleophilic attack, which can be difficult to control regioselectively and stereoselectively on a solid support.
* Peptide Backbone Modifications: Beyond lanthionine, mersacidin may contain other post-translational modifications that add to the synthetic complexity.
* Yield and Purity: Achieving high yields and purity for such a complex molecule through a multi-step synthesis is demanding. Side reactions, incomplete couplings, and racemization can significantly impact the final product quality.作者：RS Narayan·2005·被引用次数：87—As part of our research effort directed toward thesynthesisand mechanistic study of the lantibioticpeptide mersacidin(1), we report stereoselective ...
* Stereochemistry: Maintaining the correct stereochemistry of all chiral centers throughout the synthesis is critical for biological activity.
Researchers often employ Fmoc-based SPPS, a widely used strategy that utilizes the fluorenylmethyloxycarbonyl (Fmoc) protecting group for the α-amino group. This strategy is compatible with many side-chain protecting groups and allows for mild cleavage conditions.
The total synthesis of mersacidin, significantly facilitated by solid-phase peptide synthesis techniques, underscores the power of modern organic chemistry in accessing complex natural products.作者：H Brötz·1997·被引用次数：294—This hypothesis was further supported by the ability ofmersacidinto inhibit pep- tidoglycansynthesisin a cell-free system based on isolated. Escherichia ... The successful synthesis of mersacidin not only provides a vital tool for understanding its biological function and mechanism of action but also paves the way for the development of novel antimicrobial therapiesMode of action of mersacidin - inhibition of peptidoglycan .... Continued advancements in SPPS and related synthetic methodologies will undoubtedly enable the creation of even more intricate peptide structures, offering new hope in the fight against infectious diseases.Solid-phase peptide synthesis: an overview focused on the ...
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