myristoylated peptide myristoylated pre-S1 peptide (Myr47 - Myristoyl group peptides Myristoylated Peptide: Understanding the Role of Myristoylation in Peptide Functionality

MyristoylatedGFP Myristoylated peptides represent a fascinating area of biochemical research, primarily due to the significant impact of myristoylation on peptide properties and functions作者：F Bugli·2022·被引用次数：19—In this paper, we investigated the in vitro and in vivo antifungal activity ofthree short myristoylated and non-myristoylated peptidesderived from a mutant .... Myristoylation, the process of attaching a myristate group (a 14-carbon saturated fatty acid) to a peptide, profoundly influences its behavior, particularly its cellular uptake and interaction with biological membranes. This article delves into the intricacies of myristoylated peptides, exploring their formation, applications, and the scientific understanding behind their enhanced functionality.作者：T Eichholtz·1993·被引用次数：352—Here, we show thatN-myristoylation of the PKC pseudosubstrate nonapeptidePhe-Ala-Arg-Lys-Gly-Ala-Leu-Arg-Gln permits its use as an inhibitor ...

At its core, myristoylation is a post-translational modification that attaches a 14-carbon fatty acid, specifically myristic acid, to the N-terminal glycine residue of target proteins or peptides. This irreversible attachment is catalyzed by an enzyme called N-myristoyltransferase (NMT). The myristoyl group itself is hydrophobic, and its conjugation to a peptide transforms it into a lipopeptideAutocamtide-2-related inhibitorypeptide,myristoylatedis a CaM kinase II inhibitor; enhanced cell permeable derivative of Autocamtide-2-related inhibitory .... This lipidation serves as a hydrophobic anchor, allowing myristoylated proteins and peptides to interact with other molecules and, crucially, with lipid bilayers, such as cell membranes. This interaction is fundamental to the targeting of cytoplasmic proteins to intracellular membranes and plays an essential role in membrane targeting and protein-protein interactions.

The enhanced interaction with lipid membranes conferred by the myristoyl group leads to several key functional advantages for peptides. One of the most significant is improved cell permeability. Research indicates that myristoylated peptides likely have high cell permeability due to their mixed cationic/hydrophobic character at the N-terminus. This property is particularly valuable for therapeutic applications, where delivering peptides into cells is often a bottleneck. For instance, studies have investigated myristoyl-based transport of peptides into living cells, demonstrating efficient uptake of myristoylated, fluorescent peptides.Myristoylation allows for weak protein–protein and protein–lipid interactionsand plays an essential role in membrane targeting, protein–protein interactions ...

Beyond general cell permeability, myristoylation has been explored for its role in specific cellular processes. For example, myristoylated peptides could activate If, a phenomenon observed in cardiac cells, suggesting potential applications in cardiovascular research. Furthermore, the modification can influence protein-protein and protein-lipid interactions. Myristoylation allows for weak protein–protein and protein–lipid interactions, which are critical for various cellular signaling pathways and protein localization.

The scientific literature showcases a diverse range of myristoylated peptides with specific applications:

* Inhibitory Peptides: Several myristoylated peptides function as potent inhibitors of various enzymes and signaling pathways.Myristoylation - Wikipedia For instance, PKCε inhibitor peptide, myristoylated (Myr-PKCε-) has been studied for its ability to reduce nitric oxide release in certain cell typesMyristoylation. Similarly, Myristoylated PKC- pseudosubstrate peptide has shown potential as a multidrug resistance reversal agent in human breast cancer cells. Autocamtide-2 Related Inhibitory Peptide, myristoylated is a well-characterized CaM kinase II inhibitor, with enhanced cell permeability due to myristoylation. Another example is AC3-I, myristoylated, which is described as a biological active peptide and a myristoylated form of Autocamtide-3-Derived Inhibitory Peptide. Dynamin inhibitory peptide, myristoylated acetate has been shown to inhibit dynamin, blocking amphiphysin binding and hindering endocytosis.

* Cell-Penetrating Peptides: The enhanced cell permeability makes myristoylated peptides attractive as cell-penetrating peptide (CPP) conjugatesAutocamtide-2-related inhibitory peptide (myristoylated). A myristoylated cell-penetrating peptide bearing a transferrin receptor-targeting peptide has been designed for targeted delivery. The development of computational design of myristoylated cell-penetrating peptides further highlights the interest in leveraging this modification for effective intracellular deliveryMyristoylation - an overview | ScienceDirect Topics.

* Viral Pathogenesis Research: Myristoylation plays a role in viral mechanisms. The crystal structure of certain viral components in complex with two N-myristoylated peptides has been determined, shedding light on viral pathogenesis.2013年10月13日—N-myristoylation is a post translational modificationthat attaches a 14-carbon fatty acid to the N-terminal glycine residue of target proteins ... The myristoylated pre-S1 peptide (Myr47), synthesized to mimic a domain of the hepatitis B virus (HBV) surface protein, has been shown to prevent HBV infection. The "myristoyl switch" mechanism in HIV-1 matrix protein (p17) has also been investigated through the total chemical synthesis of N-myristoylated HIV-1 matrix proteins.

* Other Applications: Research has also explored myristoylated peptides in areas such as potentiating ion currents, with studies showing that myristoylated peptides could potentiate the funny current (If). Additionally, myristoylated peptides have been used in studies investigating protein interactions, such as the binding of N-myristoylated G-protein βγ selective binding peptide to disrupt G-protein signalingMyristoylated peptides potentiate the funny current (If) in .... The structure of N-myristoylated 5-mer peptides bound to primate major histocompatibility complex (MHC) class I has also been elucidatedWhat is Myristoylation? - News-Medical.

The versatility of myristoylation extends to the creation of modified peptides for research purposes, such as Myristoyl Pentapeptide-17, and the study of myristoylatedGFP variants.Autocamtide-3 Derived Inhibitory Peptide(AC3-I) The precise sequence governing myristoylation, known as the myristoylation sequence, is a critical factor in determining which peptides undergo this modificationThe myristoyl group acts as a hydrophobic anchor, allowingmyristoylated proteinsto interact with other proteins or lipid bilayers. This interaction can be .... Understanding the myristoyl structure and its interaction with biological systems is key to harnessing the full potential of these modified peptides.

In summary, myristoylated peptides are a significant class of biomolecules where the addition of a myristate group enhances their lipophilicity and cell permeability. This modification facilitates their interaction with cell membranes and opens doors for diverse applications in medicine, biotechnology, and fundamental biological research, underscoring the profound impact of even small chemical modifications on peptide function.