chemical synthesis of haloduracin solid-phase peptide synthesis solid phase peptide synthesis - pro-peptide-polen phase peptide synthesis Unveiling the Chemical Synthesis of Haloduracin via Solid-Phase Peptide Synthesis

chrono-peptide-booster-hydrafacial The field of peptide synthesis has witnessed remarkable advancements, enabling the creation of complex biomolecules with therapeutic potential.NIH Public Access Among these, haloduracin, a potent two-peptide lantibiotic, has garnered significant attention due to its synergistic antimicrobial activity作者：S De Luca·被引用次数：12—Solid-PhaseS-Alkylaion Promoted by Molecular Sieves. Org ... Linked Glycosyl Amino Acids in Solution- andSolid-Phase Peptide.Synthesis.. Understanding the chemical synthesis of such intricate structures, particularly through solid-phase peptide synthesis (SPPS), is crucial for unlocking their full therapeutic promise. This article delves into the methodologies and considerations involved in the chemical synthesis of haloduracin solid-phase peptide synthesis, exploring the underlying principles and the expertise required for successful execution.Solid Phase Synthesis

Haloduracin itself is a fascinating molecule composed of two distinct peptides, Halα and Halβ. These haloduracin peptides are derived from precursor peptides, HalA1 and HalA2, respectively, and undergo significant post-translational modifications, including lanthionine ring formation, to achieve their mature, biologically active forms作者：PJ Knerr·2013·被引用次数：68—via 9-fluorenylmethoxycarbonyl-basedsolid-phase peptidesyn- thesis ...peptideofhaloduracin.16 Further synthetic efforts using this.. The synergistic interaction between Halα and Halβ is fundamental to Haloduracin's potent antimicrobial efficacy, making its precise synthesis a key area of research.

The primary method employed for the efficient construction of peptides like those found in haloduracin is solid-phase peptide synthesis (SPPS). This technique, pioneered by R.Solid Phase Peptide Synthesis (SPPS) explained - Bachem Bruce Merrifield, involves anchoring the C-terminal amino acid of the peptide to an insoluble solid support, typically a resin. Subsequent amino acids are then sequentially added to the growing peptide chain, with each coupling step followed by a deprotection step to prepare the N-terminus for the next addition. This iterative process allows for the efficient synthesis of peptides, even those with complex sequences.

For the chemical synthesis of haloduracin, particularly its constituent haloduracin peptides, established SPPS protocols are often adapted.作者：AL McClerren·2006·被引用次数：336—Haloduracin'sbiological activity depends on the presence of both modifiedpeptides. The structures of the two maturehaloduracin peptidesHalalpha and ... The Fmoc-based solid-phase peptide synthesis (Fmoc-SPPS) is a widely adopted strategyLanthionine Peptides by S‑Alkylation with Substituted .... This approach utilizes the 9-fluorenylmethoxycarbonyl (Fmoc) group as a temporary N-terminal protecting group, which can be selectively removed under mild basic conditions, typically using piperidine.作者：NA Bindman·2013·被引用次数：49—One example ishaloduracin(Figure 2B), consisting of Halα produced from the HalA1 precursorpeptideby the lanthionine synthetase HalM1, and Halβ, generated ... This contrasts with older methods that employed the tert-butyloxycarbonyl (Boc) strategy, which required harsher acidic conditions for deprotection. The mild nature of Fmoc deprotection is particularly advantageous when dealing with sensitive amino acids or those requiring specific side-chain protection strategiesDiscovery and in vitro biosynthesis of haloduracin, a ... - PubMed.

The synthesis of haloduracin presents unique challenges owing to the presence of non-proteinogenic amino acids and complex thioether cross-links characteristic of lantibiotics. The formation of these lanthionine rings, for instance, requires specialized chemical transformations that are often integrated into the solid-phase peptide synthesis process or carried out after the peptide has been cleaved from the resin. Researchers have explored various chemical approaches to mimic the in vivo post-translational modification (PTM) machinery, aiming to achieve the correct folding and cyclization of the haloduracin peptides.

The literature highlights several key aspects relevant to the chemical synthesis of haloduracin solid-phase peptide synthesis:

* Precursor Peptide Synthesis: The initial step involves the solid-phase peptide synthesis of the linear precursor peptides, HalA1 and HalA2.Insights into the Mode of Action of the Two-Peptide Lantibiotic ... This requires careful selection of protecting groups for the amino acid side chains to prevent unwanted side reactions during chain elongation. For instance, appropriate protecting groups are essential for residues that will undergo modification to form the lanthionine rings.

* Post-Translational Modifications: After the linear peptide chains are assembled on the solid support or after cleavage, the crucial modifications occur. This can involve enzymatic or chemical methods to introduce the thioether linkages that form the characteristic rings of lantibiotics.作者：GN Thibodeaux·2015·被引用次数：33—Haloduracinis a lantibiotic that is composed of two post-translationally modifiedpeptides, Halα and Halβ, which are biosynthesized from the precursorpeptides... While in vitro biosynthesis studies have elucidated the natural modification enzymes like HalM1 and HalM2 for haloduracin, their direct application in large-scale chemical synthesis can be challenging. Therefore, chemists often rely on chemical strategies to achieve these modificationsPeptide Design: Principles & Methods | Thermo Fisher Scientific - AU.

* Solid Support and Linkers: The choice of solid support and linker is critical in SPPSSolid-phase peptide synthesis: from standard procedures .... Commonly used resins include polystyrene-based supports like Wang resin or Rink amide resin, depending on whether a free acid or an amide C-terminus is desired.Discovery and in vitro biosynthesis of haloduracin, a ... - PubMed The linker molecule connects the peptide to the resin and must be stable during the synthesis but cleavable under specific conditions at the end of the process.

* Coupling Reagents: Efficient coupling of amino acids is paramount for high yields and purity. Various coupling reagents, such as HBTU, HATU, or DIC/HOBt, are employed to activate the carboxyl group of the incoming amino acid, facilitating its reaction with the free amine of the growing peptide chain.

* Purification and Characterization: Following cleavage from the solid support and any post-synthesis modifications, the crude haloduracin peptides require rigorous purification, typically using reversed-phase high-performance liquid chromatography (RP-HPLC). Comprehensive characterization using techniques like mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy is essential to confirm the identity and purity of the synthesized product.

The chemistry involved in peptide synthesis is a complex and specialized area(PDF) Synthesis of the Lantibiotic Lactocin S Using Peptide .... The successful chemical synthesis of haloduracin demands a deep understanding of organic chemistry, peptide chemistry, and the specific challenges posed by lantibiotic structures.A general method for fluorescent labeling of the N-termini ... Researchers have successfully synthesized analogues of other lantibiotics, such as lacticin 481 and lacticin 3147 A2, using Fmoc-SPPS, providing valuable insights and established methodologies that can be applied to the synthesis of haloduracin.

In conclusion, the chemical synthesis of haloduracin solid-phase peptide synthesis is a sophisticated endeavor that leverages the power of solid-phase peptide synthesis techniques, particularly Fmoc-SPPS作者：AC Ross·2011·被引用次数：116—Three different ring analogs of lacticin 3147 A2 were synthesized usingsolid phase peptide synthesisand were then compared with natural A2.. The intricate structure of haloduracin, with its modified amino acids and cross-links, necessitates specialized chemical strategies and meticulous executionPeptide Design: Principles & Methods | Thermo Fisher Scientific - AU. Continued research in this area holds the key to producing sufficient quantities of haloduracin and its analogues for further biological evaluation and potential therapeutic applications in combating antimicrobial resistance.Combating Antimicrobial Resistance With New-To-Nature ... The journey from precursor peptides to the final active molecule is a testament to the ingenuity and precision of modern chemical synthesis.Solid-Phase Peptide Synthesis: An Introduction