Evolution-inspired engineering of nonribosomalpeptidesynthetases Non ribosomal peptide synthase (NRPS) enzymes are crucial molecular machines responsible for synthesizing a vast array of complex peptides that are not produced through the standard ribosomal pathway.作者：BR Miller·2016·被引用次数：211—Thenon-ribosomal peptide synthetasesare modular enzymes that catalyze synthesis of important peptide products from a variety of standard and non-proteinogenic ... These nonribosomal peptides (NRPs) are a significant class of microbial secondary metabolites, exhibiting remarkable structural diversity and a broad spectrum of biological activities, including antibiotic, antifungal, and cytotoxic properties.The many faces and important roles of protein– ... Unlike protein synthesis on ribosomes, which relies on messenger RNA templates, NRPSs operate as independent, large multienzyme machineries or large, multimodular enzymes. This fundamental difference in their synthesis mechanism allows for the incorporation of non-proteinogenic amino acids and other unusual building blocks, leading to the unique structures and functions of NRPs.
The defining characteristic of NRPSs is their modular design. Each NRPS is typically composed of a series of discrete modules, with each module responsible for catalyzing a specific step in the peptide assembly processVisualizing a Key Step in How an NRPS Enzyme Produces an Antibiotic. This modularity is key to understanding how NRPSs create such diverse peptide structures.
* Initiation Module: This module usually contains a condensation (C) domain and an adenylation (A) domain. The A domain selects and activates the specific amino acid or precursor molecule for incorporation into the growing peptide chain.作者：RD Süssmuth·2017·被引用次数：1045—Nonribosomal peptide synthetases (NRPSs) arelarge multienzyme machineries that assemble numerous peptideswith large structural and ... The C domain then facilitates the formation of a peptide bond.作者：KAJ Bozhüyük·2024·被引用次数：62—NRPSs are genetically encoded molecular assembly lines that biosynthesize a broad range of valuablenonribosomal peptides(NRPs) or even ...
* Elongation Modules: Subsequent modules typically include an A domain for substrate selection, a thiolation (T) or peptidyl carrier protein (PCP) domain to tether the growing peptide chain, and a C domain for peptide bond formation.The inherent flexibility of type I non-ribosomal peptide ... Modules can also contain additional domains for modifications, such as epimerization (E) domains that invert the stereochemistry of amino acids or N-methyltransferases (MT) that add methyl groups.
* Termination Module: The final module often includes a thioesterase (TE) domain. This domain is responsible for releasing the completed peptide from the NRPS complex, often through cyclization or hydrolysis, leading to the formation of linear or cyclic peptides.作者：T Izoré·2018·被引用次数：107—Non-ribosomal peptide synthetase (NRPS) machineriesare complex, multi-domain proteins that are responsible for the biosynthesis of many ...
The order and specific domains present within these modules dictate the sequence and modifications of the resulting nonribosomal peptide. This genetic encoding of molecular assembly lines allows for precise control over peptide biosynthesisStructural Biology of Non-Ribosomal Peptide Synthetases - PMC.
The peptides synthesized by non-ribosomal peptide synthetases are not mere biochemical curiosities; they are vital compounds with significant implications across various fields.
* Antibiotics: Many clinically important antibiotics, such as penicillin and vancomycin, are NRPS-derived. Their ability to incorporate unusual amino acids and form complex structures contributes to their potent antimicrobial activity.Nonribosomal Peptide Synthesis—Principles and Prospects
* Toxins: Some NRPS products are potent toxins, such as microcystins produced by cyanobacteria, which can have severe health and environmental impactsNonribosomal Peptide Synthesis—Principles and Prospects.
* Siderophores: These iron-chelating compounds are essential for microbial survival in iron-limited environments and play a role in pathogenesis.
* Immunosuppressants and Anticancer Agents: NRPSs produce a range of therapeutic agents, including cyclosporine (an immunosuppressant) and doxorubicin (an anticancer drug), highlighting their biotechnological potential作者：MA Martínez-Núñez·2016·被引用次数：169—Nonribosomal peptidesare products that fall into the class of secondary metabolites with a diverse properties as toxins, siderophores, ....
The study of non ribosomal peptide synthesis is an active area of research, focusing on understanding the intricate molecular mechanisms, engineering novel NRPS systems, and discovering new bioactive peptides with therapeutic applications作者：RD Süssmuth·2017·被引用次数：1045—Nonribosomal peptide synthetases (NRPSs) arelarge multienzyme machineries that assemble numerous peptideswith large structural and functional diversity.. The evolution-inspired engineering of nonribosomal peptide synthetases is particularly promising for creating customized peptides with tailored properties.
The core distinction lies in the template and machinery. Ribosomal peptide synthesis relies on the genetic code carried by mRNA, with ribosomes acting as the translation machinery. This process is highly conserved and produces proteins with defined amino acid sequences.Ribosome Biogenesis is Necessary for Skeletal Muscle Hypertrophy In contrast, nonribosomal peptide synthesis is independent of mRNA templates作者：MA Martínez-Núñez·2016·被引用次数：169—Nonribosomal peptidesare products that fall into the class of secondary metabolites with a diverse properties as toxins, siderophores, .... Instead, the NRPS enzymes themselves act as the template and machinery, using their modular domains to select, activate, and link precursor molecules in a programmed sequence. This difference in mechanism allows NRPSs to produce peptides with a much wider range of structural diversity, including cyclic peptides, peptides containing D-amino acids, and those with modified side chains, which are rarely, if ever, found in ribosomal products.
In summary, non ribosomal peptide synthase enzymes are sophisticated biological factories that construct a remarkable array of peptide natural productsMolecular Mechanisms Underlying Nonribosomal Peptide .... Their modular architecture and unique synthesis pathway enable the creation of molecules with diverse biological activities, making them indispensable in microbial metabolism and a valuable resource for drug discovery and biotechnology.
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