GO-203 TFA

H-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Cys-D-Gln-D-Cys-D-Arg-D-Arg-D-Lys-D-Asn-OH.TFA is a synthetic D-amino acid-rich peptide featuring a distinctive sequence that imparts remarkable resistance to enzymatic degradation and enhanced stability under various experimental conditions. The inclusion of multiple D-arginine residues confers a pronounced cationic character, while the presence of cysteine residues enables potential disulfide bond formation, further contributing to its conformational rigidity. The trifluoroacetate (TFA) salt form enhances solubility and handling, making this peptide an attractive candidate for a wide array of biochemical and biophysical research applications. Its unique composition distinguishes it from conventional L-peptides, offering advantages in terms of protease resistance and bioengineering versatility.

Peptide-based delivery systems: One of the primary applications of this D-arginine-rich peptide is in the development of peptide-based delivery systems. Its high positive charge density facilitates strong electrostatic interactions with negatively charged cell membranes, enabling efficient cellular uptake. Researchers utilize this property to design non-viral vectors for the intracellular delivery of nucleic acids, proteins, or small molecules. The D-configuration not only enhances stability in biological environments but also minimizes recognition and cleavage by endogenous proteases, ensuring prolonged activity and improved delivery efficiency in vitro studies.

Antimicrobial research: The sequence's abundance of D-arginine residues makes it a valuable tool in antimicrobial research. Cationic D-peptides have been shown to disrupt microbial membranes through electrostatic and hydrophobic interactions, leading to cell lysis. This peptide serves as a model compound for studying the structure-activity relationships of antimicrobial peptides, particularly those that are resistant to enzymatic degradation. Its synthetic nature allows for systematic modifications, enabling the exploration of new antimicrobial agents and the elucidation of mechanisms underlying peptide-membrane interactions.

Biophysical studies of peptide folding and stability: The incorporation of D-amino acids and cysteine residues in this compound renders it an excellent model for biophysical investigations into peptide folding, stability, and conformational dynamics. The resistance to proteolysis and the potential for disulfide bond formation allow researchers to probe the structural consequences of D-amino acid substitution and to compare folding pathways with those of natural L-peptides. Such studies provide valuable insights into the design of stable peptide scaffolds for diverse biotechnological applications.

Molecular probe development: H-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Cys-D-Gln-D-Cys-D-Arg-D-Arg-D-Lys-D-Asn-OH.TFA can be functionalized with various labels or reporter groups, making it an excellent scaffold for the development of molecular probes. Its stability and resistance to enzymatic degradation ensure sustained signal retention in complex biological samples. Researchers exploit these features to create fluorescent or biotinylated probes for imaging, tracking, or quantifying specific biomolecular interactions in vitro. The peptide's modular structure also allows for the attachment of affinity tags, facilitating purification or detection in analytical workflows.

Protein engineering and synthetic biology: The unique sequence of this D-peptide supports its use in protein engineering and synthetic biology initiatives. By incorporating it into larger constructs or fusion proteins, scientists can endow engineered molecules with enhanced stability, resistance to degradation, and novel functional properties. Its capacity to form stable secondary structures, combined with its cationic nature, makes it a versatile building block for the design of artificial enzymes, scaffolds, or biomaterials with tailored properties for research and industrial applications.

Cell-penetrating peptide research: The high density of D-arginine residues in this peptide sequence makes it a valuable model for studying cell-penetrating peptides (CPPs). Investigators use it to dissect the mechanisms by which CPPs traverse cellular membranes, evaluate uptake efficiency, and assess intracellular trafficking in various cell types. Its protease resistance and robust membrane translocation capabilities provide an ideal platform for developing next-generation CPPs with improved performance for research and biotechnological applications. Through these diverse applications, H-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Arg-D-Cys-D-Gln-D-Cys-D-Arg-D-Arg-D-Lys-D-Asn-OH.TFA continues to advance the frontiers of peptide science and molecular engineering.

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