native peptide ligation Native chemical ligation (NCL - Solid statepeptidesynthesis provides a highly efficient and robust means to chemoselectively link unprotected peptide The Power of Native Peptide Ligation in Modern Protein Synthesis

Solid statepeptidesynthesis Native peptide ligation (NPL) has emerged as a cornerstone technique in the field of peptide and protein chemistry, revolutionizing how scientists approach the synthesis of native or modified proteins. This method allows for the efficient and precise joining of synthetic peptide fragments, overcoming limitations inherent in traditional recombinant or solid-phase synthesis approaches. The ability to create complex protein structures with defined characteristics is crucial for advancing research in various biological and biomedical disciplines.

At its core, Native chemical ligation (NCL), a prominent form of NPL, involves the reaction between a C-terminal peptide thioester and an N-terminal cysteinyl peptide.Traceless native chemical ligation of lipid-modified peptide ... This specific reaction creates a native peptide bond at the junction site, resulting in a seamless and chemically identical linkage to what would be found in a naturally occurring protein. This elegant peptide ligation strategy has been pivotal in enabling the total synthesis and semisynthesis of increasingly complex peptide and protein targets, as highlighted by numerous research publications. The development by the Kent laboratory, for instance, provided a robust method for synthesizing native or modified proteins of significant size, typically those under 300 amino acids.

The mechanism of Native chemical ligation is quite specific作者：S Jin·2020·被引用次数：15—We show that micelle-assisted reaction can facilitatenativechemical ligations (NCLs) between apeptide-thioester – in which the thioester leaving group .... It relies on the nucleophilic attack of the thiol group of the N-terminal cysteine residue onto the electrophilic carbon of the C-terminal thioester. This initial reaction forms a stable thioester intermediate, which then undergoes an intramolecular rearrangement to form the desired native amide bond. This process is often carried out in aqueous solutions, making it compatible with sensitive peptide structures and facilitating the assembly of larger biomoleculesBis(2-sulfanylethyl)amino Native Peptide Ligation. The effectiveness of Native Chemical Ligation (NCL) is further amplified by its ability to join two synthesized peptides without the need for protecting groups at the ligation site, simplifying the overall synthetic process.作者：DL Huang·2024·被引用次数：16—Chemical ligation of peptidesis increasingly used to generate proteinsnot readily accessible by recombinant approaches.

Beyond the standard Cysteine-based native chemical ligation (NCL), researchers have developed modifications and extensions to broaden its applicability. For instance, cysteine-free peptide ligation methods have been developed, utilizing thiol acyl transfer auxiliaries which can be removed under mild conditions after facilitating the ligationNative Chemical Ligation in Protein Synthesis and Semi- .... These advancements are critical for synthesizing peptides or proteins that may not contain cysteine residues or where cysteine modification is undesirable. Furthermore, strategies like the SEA Native Peptide Ligation offer alternative ligation chemistries, enriching the native peptide ligation repertoire available to peptide chemists. This particular method, SEA ligation enriches the native peptide ligation toolkit by providing another effective way to join peptide segments.

The utility of NPL extends to creating proteins that are not readily accessible through recombinant methodsSequential native peptide ligation strategies for total .... This is particularly true for proteins with challenging sequences, post-translational modifications, or those requiring isotopic labeling at specific positions. The ability to perform peptide ligation in a controlled and predictable manner allows for the precise incorporation of these modifications. For example, Native Chemical Ligation at Phenylalanine via 2-mercaptoethanol derivatives represents an innovative approach to forming peptide bonds at sites other than cysteine, further expanding the synthetic possibilities.

The synthesis of larger proteins often requires a sequential approach, where multiple peptide fragments are ligated in a specific orderSynthesis of Proteins by Native Chemical Ligation. Sequential native peptide ligation strategies are designed to address this, allowing for the step-wise assembly of polypeptides. This is crucial for the synthesis of proteins by native chemical ligation that exceed the length achievable by ligating just two fragmentsSEA Native Peptide Ligation. The development of new methodologies, such as those employing thioacids or utilizing N to C sequential ligation, continues to refine these strategies.

The field of Native Chemical Ligation is continually evolving, with ongoing research focused on improving efficiency, expanding substrate scope, and developing novel ligation chemistries作者：L Raibaut·2012·被引用次数：254—The aim of this tutorial review is to present the basic concepts and challenges underlying the design of sequentialpeptide ligationstrategies.. Researchers are exploring ways to enhance ligation rates, overcome solubility challenges for certain peptides, and develop more robust and versatile ligation systems. For instance, the use of micelle-assisted reactions has been shown to facilitate native chemical ligations (NCLs), particularly for peptide-thioesters. The ultimate goal is to provide a highly efficient and robust means to chemoselectively link unprotected peptide and protein segments to generate complex, biologically relevant molecules作者：CR Forbes·2025—Native chemical ligation (NCL) enables the synthesis of complex peptides and proteins with defined post-translational modifications and/or ....

In summary, native peptide ligation and its various forms, particularly Native chemical ligation (NCL), represent a powerful and indispensable tool in modern biochemistry and synthetic biology. Its ability to form native peptide bonds, couple peptide fragments efficiently, and enable the synthesis of proteins by native chemical ligation has significantly advanced our capacity to study and engineer complex protein structuresNative Chemical Ligation of Peptides and Proteins - PMC - NIH. The ongoing innovation in this area promises even greater capabilities for chemical synthesis of peptides and proteins in the future.