solid-phase peptide synthesis of mersacidin total synthesis phase peptide - solid-phase-peptide-synthesis-total-synthesis-nisin Total Synthesis

solid-phase-peptide-synthesis-of-nisin The total synthesis of mersacidin using solid-phase peptide synthesis (SPPS) represents a significant achievement in organic chemistry, enabling detailed structural and functional studies of this complex lantibiotic. Mersacidin, a 20-amino acid antimicrobial peptide produced by *Bacillus* species, is characterized by its unique thioether bridges formed by lanthionine residues. The intricate structure and potent biological activity of mersacidin make its chemical synthesis a challenging yet rewarding endeavor. SPPS, a widely adopted methodology in peptide chemistry, provides a robust platform for constructing such complex peptides in a stepwise manner.

The Principles of Solid-Phase Peptide Synthesis for Mersacidin

Solid-phase peptide synthesis involves the sequential addition of amino acids to a growing peptide chain anchored to an insoluble solid support, typically a resin bead. This method offers several advantages for the synthesis of complex peptides like mersacidin, including simplified purification steps, as excess reagents and byproducts can be washed away after each coupling reactionmild conditions used to remove the allyl groups are compatible with classical Fmoc/tBu methods forsolid-phase peptide synthesis. 4,5. For more information .... The process generally begins with the attachment of the C-terminal amino acid to the resin.Full-text available. Apr 2024; ANGEW CHEM INT EDIT · Hongxiang Wu · Zhenquan Sun · Xuechen Li. Althoughsolid‐phase peptide synthesis... Subsequent amino acids are then coupled to the N-terminus of the growing chain. Protection strategies are crucial, with temporary protecting groups on the N-terminus and side chains of amino acids preventing unwanted reactions. For mersacidin, the presence of modified amino acids and thioether linkages necessitates carefully designed synthetic strategiesThe Total Synthesis of Depsipeptide Antibiotics.

Challenges in Synthesizing Mersacidin

The total synthesis of mersacidin presents several unique challenges. The formation of lanthionine rings, which involves the cyclization of cysteine residues with dehydroalanine or dehydrobutyrine, requires specific chemical conditions and precursors. These modified amino acids are not standard in the genetic code and must be either pre-synthesized or formed *in situ* during the synthesis.Solid-Phase Peptide Synthesis Furthermore, mersacidin contains a NisA-type leader peptide and a core peptide, with the mature peptide being released after proteolytic cleavage. Replicating this post-translational modification process through chemical synthesis adds another layer of complexity. Researchers have explored various approaches, including Fmoc (9-fluorenylmethoxycarbonyl) chemistry-based SPPS, which is a common and versatile strategy for synthesizing peptides with complex modifications.

Strategies for Mersacidin Total Synthesis

Overcoming the complexities of mersacidin's structure demands innovative synthetic methodologies.Fundamental functionality: recent developments in ... Researchers often employ orthogonal protecting group strategies to selectively deprotect and functionalize specific residues, enabling the precise formation of the thioether bridges. The synthesis of the modified amino acids, such as lanthionine precursors, is a critical prerequisite. These can be synthesized separately and then incorporated into the peptide chain during SPPS.Hybrid Lantibiotics: Combining Synthesis and Biosynthesis Alternatively, *in situ* modification strategies can be employed, where dehydroamino acids are formed on the resin and then cyclizedAllthe biosynthetic pathways remain intact, only peptidoglycansynthesisis affected due to inhibition of glucose and d-alanine incorporation. The principal .... The successful total synthesis of mersacidin has relied on iterative cycles of amino acid coupling, deprotection, and modification, carefully optimized to maximize yield and purity. The ability to perform the total synthesis allows for the creation of analogues and modified versions of mersacidin, which can be invaluable for understanding its structure-activity relationships and for developing new antimicrobial agents2012年9月7日—...solid-phase peptidethioestersynthesisby an Fmoc-based strategy. ... Aulakh, V. S.; Ciufolini, M. A.Total Synthesisand Complete Structural ....

The Significance of Solid-Phase Peptide Synthesis in Lantibiotic Research

The application of solid-phase peptide synthesis has been instrumental in advancing the study of lantibiotics, including mersacidin. It provides a reliable and scalable method for producing these complex natural products for biological evaluationAI. The research details thetotal synthesisof the lantibiotic lactocin S, a naturalpeptidefrom Lactobacillus sakei, throughsolid-phase peptidecyclizations .... Beyond mersacidin, SPPS has been successfully applied to the synthesis of other related lantibiotics and their fragments, facilitating investigations into their mechanisms of action, resistance profiles, and potential therapeutic applications.作者：H Liu·2010·被引用次数：1—Synthesisof N-terminal pentapeptides. 42. 2.2.I.e.Solid Phase Peptide Synthesisof oxa-lacticin 3147 A2 (45). 44. 2.2.l.d. Biological testing of oxa-lacticin ... The development of efficient SPPS protocols for modified peptides continues to be an active area of research, pushing the boundaries of what can be achieved in synthetic peptide chemistry and contributing significantly to our understanding of these important antimicrobial compounds.

In conclusion, the total synthesis of mersacidin via solid-phase peptide synthesis is a testament to the power of modern organic chemistry. It enables the detailed study of this potent lantibiotic, paving the way for potential therapeutic advancements and a deeper understanding of complex peptide structures in nature.