solid-phase peptide synthesis of lanthipeptides peptides - colageno-peptides-y-sus-beneficios Lanthipeptides Solid-Phase Peptide Synthesis of Lanthipeptides: A Comprehensive Guide

colageno-multi-collagen-peptides Lanthipeptides are a fascinating class of ribosomally synthesized and post-translationally modified peptides (RiPPs) that are exceptionally abundant in bacteria. Their unique structural features, particularly the presence of lanthionine bridges and other thioether cross-links, bestow upon them a wide array of potent biological activities, ranging from antimicrobial to antitumor propertiesThe strategy involves thesolid-phase synthesisof sulfamidate-containingpeptidesfollowed by late-stage intramolecular cyclization. This protocol allowed .... The reliable and efficient synthesis of these complex molecules is crucial for unlocking their therapeutic potential and for advancing our understanding of their biochemical roles作者：EL Ongey·2016·被引用次数：138—Industrialpeptideproduction is commonly based on three alternative technologies includingsolid-phase synthesis, liquid-phasesynthesis, and in vivo .... Among the various synthesis strategies, solid-phase peptide synthesis (SPPS) has emerged as a cornerstone technique for constructing lanthipeptides.Article Discovery, biosynthesis, and characterization of a ... This article delves into the intricacies of employing SPPS for lanthipeptide synthesis, exploring its advantages, challenges, and recent advancements作者：B Xu·被引用次数：16—Solid-phaseculture of T81 led to the isolation of tikitericin 1, a newlanthipeptidecharacterised by four. (methyl)lanthionine bridges. The ....

Understanding Lanthipeptides and Their Synthesis

Lanthipeptides are characterized by their highly modified amino acid residues, most notably the dehydrated amino acids and the unique lanthionine (Lan) and methyllanthionine (MeLan) bridges formed by Michael addition reactions between cysteine residues and dehydroamino acids. These post-translational modifications are catalyzed by dedicated enzyme complexes, a process known as biosynthesis. While in vivo biosynthesis offers a natural route to these peptides, chemical synthesis provides greater control over structural modifications, allowing for the creation of analogs with enhanced or novel properties.

The chemical synthesis of lanthipeptides presents significant challenges due to the inherent complexity of their three-dimensional structures and the presence of multiple thioether linkages. Traditionally, liquid-phase synthesis was employed, but it often suffered from issues with purification and scalability. This is where Solid Phase Peptide Synthesis (SPPS) revolutionized the field.2023年10月23日—Successful targeting oflanthipeptidesto the nucleus is demonstrated. In vivo expression and targeting of suchpeptidesin mammalian cells may ...

The Power of Solid-Phase Peptide Synthesis (SPPS)

Pioneered by R. Bruce Merrifield, solid-phase peptide synthesis is a stepwise assembly of a peptide chain on a solid support, typically a resin作者：IR Rahman·2020·被引用次数：39—We next synthesized a set of peptides bysolid phase peptide synthesis(SPPS) to interrogate regions of the HalA2-LP. The N-terminal region of HalA2-LP (HalA2- .... This methodology offers several distinct advantages over traditional liquid-phase approaches, making it particularly well-suited for complex peptide synthesis, including that of lanthipeptides.

The fundamental principle of SPPS involves anchoring the C-terminal amino acid to the insoluble resin. Subsequent amino acids are then coupled one by one to the growing peptide chain. Crucially, each coupling cycle involves:

1. Deprotection: Removal of a temporary protecting group from the N-terminus of the growing peptide chain.

2. Washing: Thorough washing of the resin with solvents to remove excess reagents and byproducts作者：A Sigurdsson·2024·被引用次数：1—In addition, utilizing heterologous expression of the synthetase CuvL andsolid phase peptide synthesisof the precursor peptide, enabled us to ....

3. Coupling: Activation of the incoming amino acid and its subsequent reaction with the deprotected N-terminus to form a new peptide bond.

4. Washing: Another round of washing to remove unreacted reagents.

This cyclical process allows for the precise control of the amino acid sequence. The use of an excess of reagents in each step drives reactions to completion, and the repetitive washing steps simplify purification, as all soluble byproducts are easily washed away. Once the desired sequence is assembled, the peptide is cleaved from the resin, and any permanent side-chain protecting groups are removedMechanistic and synthetic studies on the prochlorosin and ....

Strategies for Solid-Phase Synthesis of Lanthipeptides

The application of SPPS to lanthipeptide synthesis requires specific adaptations to accommodate the unique modificationsSolid-Phase Peptide Synthesis. Several key strategies have been developed:

* Orthogonal Protection of Bisamino Acids: A common approach involves introducing residue precursors or modified amino acids, such as orthogonally protected bisamino acids, during the SPPS process.De Novo Design To Synthesize Lanthipeptides Involving ... These building blocks are designed to form the lanthionine bridges upon specific deprotection and cyclization steps, often performed while the peptide is still attached to the solid phase or during a late-stage cyclization. For instance, to form lanthionine bridges, protected cysteine residues and dehydroalanine precursors are strategically incorporated.

* Late-Stage Cyclization: In many solid phase peptide synthesis protocols for lanthipeptides, the formation of the characteristic thioether bridges occurs after the linear peptide chain has been synthesized and, in some cases, cleaved from the resin. However, strategies employing late-stage intramolecular cyclization while the peptide is tethered to the solid phase have also proven effectiveExpression of Lanthipeptides in Human Cells. This can streamline the process and simplify purification of the cyclized product.作者：B Mothia·2011·被引用次数：50—Synthesisofpeptidescontaining overlapping lanthionine bridges on thesolid phase: an analogue of rings D and E of the lantibiotic nisin. · Author information ...

* Incorporation of Modified Amino Acids: SPPS allows for the direct incorporation of pre-modified amino acids or amino acid analogs that are designed to undergo specific cyclization reactions to form the thioether linkages. This can include the use of sulfamidate-containing peptides or precursors that readily undergo Michael addition.

* Fmoc-SPPS: The fluorenylmethyloxycarbonyl (Fmoc) strategy is widely employed in SPPS for lanthipeptide synthesis.作者：MA Ortega·2014·被引用次数：51—The final step inlanthipeptidebiosynthesis involves the proteolytic removal of an N-terminal leaderpeptide. In the class Ilanthipeptideepilancin 15X, ... Fmoc chemistry offers mild deprotection conditions (using piperidine) and compatible coupling reagents, which are essential for preserving sensitive functional groups and preventing premature side reactions that could compromise the integrity of the peptideStructural and functional insights into class-IV lanthipeptide ....

Challenges and Innovations in Lanthipeptide Solid-Phase Synthesis

Despite the power of SPPS, synthesizing lanthipeptides on a solid phase is not without its challenges:

* Solubility Issues: As the peptide chain grows on the resin, its solubility can decrease, leading to aggregation and incomplete reactions. Careful selection of solvents and resins can mitigate this.

* Formation of Lanthionine Bridges: The precise formation of multiple, regioselective lanthionine bridges can be difficult to control. Optimizing reaction conditions, such as pH, temperature, and the choice of cyclization reagents, is critical.

* Purification of Complex Products: While SPPS simplifies purification compared to liquid-phase synthesis, the final cleavage and deprotection steps can still yield complex mixtures requiring rigorous purification protocols, often involving High-Performance Liquid Chromatography (HPLC)The recognition of cyclicpeptideby ST was further discussed. Bioactivity evaluation underscores the significance of the ST-catalyzed sulfonation. This study ....

* Stereochemistry: Ensuring the correct stereochemistry of the modified amino acids and the thioether linkages is paramount for biological activity.

To address these challenges, researchers are continuously innovating. Advancements include the development of novel protecting group strategies, more efficient coupling reagents, and specialized resins that enhance solubility and facilitate cyclizationMechanistic and synthetic studies on the prochlorosin and .... Furthermore, the combination of SPPS with other techniques, such as in vitro biosynthesis using engineered enzymes or cell-free systems, is opening new avenues for producing lanthipeptides with intricate modifications. The ability to synthesize fluorescent lanthipeptide analogs also aids in studying their localization and interactions within biological systems.Cell-free biosynthesis and engineering of ribosomally ...

Conclusion

Solid-phase peptide synthesis remains an indispensable tool for the chemical construction of lanthipeptides.作者：A Sigurdsson·2024·被引用次数：1—In addition, utilizing heterologous expression of the synthetase CuvL andsolid phase peptide synthesisof the precursor peptide, enabled us to ... Its stepwise nature, ease of purification, and adaptability allow for the synthesis of these complex natural products and their analogs, paving the way for their exploration as therapeutic agents and biochemical probesan analogue of rings D and E of the lantibiotic nisin. - Abstract. As chemical methodology continues to evolve, SPPS will undoubtedly play an even more significant role in unraveling the full potential of the diverse and potent world of lanthipeptides.Facile Removal of Leader Peptides fromLanthipeptides...solid phase peptide synthesisto comparatively show the potential and impact of n cAA introduction. The exploration of Genome mining, isolation, chemical synthesis and biological evaluation of a novel lanthipeptide further underscores the importance of robust synthetic approaches like SPPS.