PPACKII (trifluoroacetate salt) is a peptidyl electrophile blending aromatic, hydrophobic, and charged residues with a reactive functional group. Researchers apply it to study catalytic sites, covalent interactions, and conformational constraints. Its structural complexity supports advanced mechanistic and kinetic analyses. The TFA salt enhances solubility.
CAT No: R2405
CAS No:649748-23-2
Synonyms/Alias:PPACKII (trifluoroacetate salt);649748-23-2;PPACK II (diTFA);(2R)-2-amino-N-[(2S)-1-[[(3S)-1-chloro-6-(diaminomethylideneamino)-2-oxohexan-3-yl]amino]-1-oxo-3-phenylpropan-2-yl]-3-phenylpropanamide;2,2,2-trifluoroacetic acid;MFCD03788124;DA-66838;MS-31263;HY-122543;CS-0086593;H-D-Phe-Phe-Arg-chloromethylketone trifluoroacetate;(R)-2-Amino-N-((S)-1-(((S)-1-chloro-6-guanidino-2-oxohexan-3-yl)amino)-1-oxo-3-phenylpropan-2-yl)-3-phenylpropanamide bis(2,2,2-trifluoroacetate);
PPACKII (trifluoroacetate salt) is a synthetic peptide inhibitor recognized for its high specificity and potent activity against serine proteases, particularly those involved in coagulation pathways. As a chemically stable compound, it is widely utilized in biochemical and molecular biology research for its ability to irreversibly bind to target enzymes, thereby modulating enzymatic activity in controlled experimental settings. The trifluoroacetate salt form enhances its solubility and handling properties, making it a preferred choice in laboratory applications where precise enzyme inhibition is critical. Its unique structure allows for targeted interaction with active sites of proteases, enabling detailed mechanistic studies and functional analyses. Researchers value PPACKII for its reproducible performance and compatibility with various assay formats, which facilitates the exploration of complex biological processes and supports the advancement of protease-related investigations.
Enzyme Kinetics Studies: PPACKII is extensively used in enzyme kinetics research to elucidate the mechanisms of serine proteases. By irreversibly binding to the active site, it effectively halts the catalytic activity, allowing scientists to dissect the roles of specific residues within the enzyme's active site. This approach is instrumental in determining kinetic parameters, mapping substrate specificity, and understanding the structural basis of catalysis. The inhibitor's high selectivity ensures that experimental results reflect the true biological function of the target enzyme, minimizing off-target effects and providing clearer insights into protease dynamics.
Coagulation Pathway Analysis: In the field of hemostasis research, the peptide inhibitor is employed to dissect the intricate cascades of blood coagulation. Its ability to specifically inhibit key serine proteases, such as thrombin, makes it a valuable tool for investigating the regulation of clot formation and dissolution. Researchers utilize it to modulate specific steps in the coagulation cascade, enabling the identification of critical control points and the development of new hypotheses regarding the interplay of coagulation factors. This targeted inhibition supports the refinement of in vitro models and enhances the understanding of pathological conditions associated with abnormal clotting.
Protease Inhibitor Screening: The compound serves as a benchmark inhibitor in the screening and validation of novel protease inhibitors. By providing a reference standard for inhibitory potency and specificity, it allows for the comparative evaluation of new compounds under development. This application is particularly important in pharmaceutical research, where the identification of selective and potent protease inhibitors is a key objective. The reproducibility and well-characterized activity of PPACKII facilitate high-throughput screening workflows and support the optimization of lead candidates.
Structural Biology Investigations: Crystallography and other structural biology techniques benefit from the use of this inhibitor to stabilize protease-inhibitor complexes. By forming covalent adducts with target enzymes, it enables the capture of transient states and the visualization of enzyme-inhibitor interactions at atomic resolution. These structural insights are fundamental for rational drug design, as they reveal critical contact points and inform the development of next-generation inhibitors with improved efficacy and selectivity. The application of PPACKII in this context accelerates structure-based discovery and enhances the accuracy of molecular modeling studies.
Signal Transduction Research: Beyond its traditional roles, PPACKII (trifluoroacetate salt) is increasingly utilized in studies of cellular signaling pathways where serine proteases serve as key regulatory nodes. By selectively blocking proteolytic activity, researchers can delineate the downstream effects of protease inhibition on signal transduction, gene expression, and cellular responses. This approach is instrumental in unraveling complex networks and identifying novel regulatory mechanisms within cellular systems. The versatility and precision of this peptide inhibitor continue to drive innovation across multiple domains of life science research, solidifying its position as an indispensable tool in the modern scientific toolkit.
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