nonribosomal peptide synthetases structures and dynamics structure - no7-peptide nonribosomal peptide synthetases

non-fasting-c-peptide-range Nonribosomal Peptide Synthetases: Structures and Dynamics

Nonribosomal peptide synthetases (NRPSs) are large, multimodular enzymes crucial for synthesizing a diverse array of bioactive peptidesIn-Situ Purification of Non-Ribosomal Peptide Synthetases .... These complex molecular machineries employ intricate, stepwise reactions to assemble peptides that often feature non-proteinogenic amino acids and cyclic structures, contributing to their stability and unique conformations. Understanding the structures and dynamics of NRPSs is essential for deciphering their catalytic mechanisms and for harnessing their potential in bioengineering and the production of valuable natural products, including antibiotics and siderophores.

Modular Architecture and Catalytic Domains

NRPSs are characterized by their modular design, where each module is responsible for the incorporation of a specific amino acid into the growing peptide chain. Within each module, several catalytic domains work in concert作者：X Sun·2024—Many peptide-derived natural products with antimicrobial and anti-cancer bioactivities are produced bynonribosomal peptide synthetases(NRPS) in an .... Key domains include the adenylation (A) domain, which activates the amino acid, and the thiolation (T) or peptidyl carrier protein (PCP) domain, which covalently binds the activated amino acid via a phosphopantetheine arm. The condensation (C) domain catalyzes the formation of the peptide bond between sequentially linked amino acids, while the thioesterase (TE) domain often mediates the release of the final peptide product, sometimes involving cyclization. The precise arrangement and interaction of these domains within and between modules dictate the specificity and order of amino acid incorporation, leading to the remarkable structural diversity of non-ribosomal peptides.

Structural Insights into NRPS Function

Recent advancements in structural biology have provided invaluable snapshots of NRPS components, revealing detailed atomic structures of individual domains, di-domain fragments, and even entire modules. These structural studies have elucidated the active sites, substrate binding pockets, and the architectural features that enable the regiospecific and stereospecific catalysis characteristic of NRPSs. For instance, the structure of a condensation domain in complex with its substrate has shed light on the critical peptide bond formation step.作者：DP Frueh·2008·被引用次数：219—Non-ribosomal peptide synthetases (NRPS) and polyketide synthases (PKS)produce numerous secondary metaboliteswith various therapeutic/antibiotic properties1. Similarly, the structure of a dimodular NRPS protein has provided insights into the central condensation state and suggested the significant conformational changes involved in the catalytic cycle作者：EJ Drake·2016·被引用次数：287—Structuresof aNonribosomal Peptide SynthetaseModule Bound to MbtH-like Proteins Support a HighlyDynamicDomain Architecture · Interdomain and ....

The Crucial Role of Dynamics

While static structures offer a glimpse into enzyme architecture, the dynamic nature of NRPSs is equally critical for their function. The modular and "pipelined" synthesis process relies on the coordinated movement of domains and substrates. Understanding how these large multidomain enzymes dynamically function, including the flexibility of the PCP domains and the transient interactions between domains, is a key area of ongoing researchThe inherent flexibility of type I non-ribosomal peptide .... Evidence suggests that protein dynamics not only facilitate substrate transfer between catalytic sites but also play a role in communication across the enzyme complex, orchestrating the stepwise activation and elongation of the peptide chainDynamic Thiolation–thioesterase Structure of a Non-ribosomal ....

Research into NRPS dynamics often employs techniques like single-molecule Förster Resonance Energy Transfer (smFRET) to observe the stepwise substrate activation and chain elongation orchestrated by these enzymes.作者：K Bloudoff·2017·被引用次数：250—Structures of anonribosomal peptide synthetase module bound to MbtH-like proteinssupport a highly dynamic domain architecture. J. Biol. Chem., 291 (2016) ... Studies have also explored the inherent flexibility of NRPS modules, which allows for PCP movements during a catalytic cycle. This inherent flexibility and dynamic domain architecture are crucial for efficient substrate recognition and subsequent chemical reactions.

Implications and Future Directions

The detailed understanding of NRPS structures and dynamics has significant implications for various fieldsIn-Situ Purification of Non-Ribosomal Peptide Synthetases .... It informs our understanding of natural product biosynthesis, which is vital for discovering new therapeutic agents like antibiotics and anti-cancer compounds, as the peptides produced by NRPSs often possess potent bioactivities. Furthermore, knowledge of these structural and dynamic features is a prerequisite for bioengineering efforts aimed at creating novel peptides with tailored chemical structures and desired bioactivities. By dissecting and exploiting the intricate mechanisms of NRPSs, researchers can potentially control substrate specificity and stereospecificity, paving the way for the rational design and production of peptides for pharmaceutical and biotechnological applications. Future research will likely continue to focus on elucidating the dynamic interplay between domains and modules, exploring the conformational landscapes of NRPSs, and translating this knowledge into practical applicationsNonribosomal peptide synthetases: structures and dynamics.