Hirugen is a short peptide derived from hirudin that mimics a thrombin-binding exosite in biochemical assays. Acidic and aromatic residues create a complementary surface for thrombin recognition. Researchers use it to dissect exosite-mediated interactions and to build competition models. Applications include enzyme-surface mapping, inhibitor design, and coagulation-biology research.
CAT No: R2583
CAS No:121822-23-9
Synonyms/Alias:121822-23-9;Hirudin dodecapeptide;63-O-Sulfo-tyr-hirudin (53-64);BG 8865;Hirudin (53-64), O-sulfo-tyr(63)-;Hirudin (53-64), O-sulfotyrosine(63)-;BG8865;BG-8865;DTXSID30153376;NH2-Asn-gly-asp-phe-glu-glu-ile-pro-glu-glu-(SO3)tyr-leu-cooh;Asparaginyl-glycyl-aspartyl-phenylalanyl-glutamyl-glutamyl-isoleucyl-prolyl-glutamyl-glutamyl-O-sulfotyrosyl-leucine;L-Leucine, N-(N-(N-(N-(1-(N-(N-(N-(N-(N-(N-L-asparaginylglycyl)-L-alpha-aspartyl)-L-phenylalanyl)-L-alpha-glutamyl)-L-alpha-glutamyl)-L-isoleucyl)-L-prolyl)-L-alpha-glutamyl)-L-alpha-glutamyl)-O-sulfo-L-tyrosyl)-;DTXCID0075867;DA-54008;
Hirugen is a synthetic peptide fragment derived from the C-terminal region of hirudin, a naturally occurring anticoagulant found in the saliva of leeches. As a well-characterized peptide inhibitor, it specifically interacts with thrombin, a central serine protease in the coagulation cascade. The unique sequence and defined bioactivity of hirugen have made it a valuable molecular tool for dissecting the mechanisms of thrombin function and regulation. Its ability to modulate thrombin activity without the complexity of larger protein domains provides researchers with a precise approach to studying enzyme-substrate interactions, protein-protein binding, and the broader dynamics of hemostasis and thrombosis.
Enzyme inhibition studies: As a selective thrombin inhibitor, hirugen is widely used in biochemical assays to elucidate the functional domains of thrombin and to map its interaction sites. By competitively binding to the exosite I region of thrombin, it enables researchers to differentiate between active site and exosite-mediated substrate recognition. This specificity supports detailed kinetic analyses and structure-activity relationship investigations, advancing the understanding of serine protease regulation within the coagulation system.
Protein-protein interaction research: The peptide's defined binding properties make it an effective probe for investigating protein-protein interactions involving thrombin. In structural biology and biophysical studies, hirugen is utilized to stabilize particular thrombin conformations, facilitating crystallography and NMR analyses. These applications are instrumental in characterizing the molecular determinants of thrombin's interaction with physiological substrates such as fibrinogen, protease-activated receptors, and regulatory cofactors.
Peptide-based drug design: Hirugen serves as a model compound in the development and optimization of novel anticoagulant peptides and small molecules. Its sequence and binding characteristics provide a foundation for rational drug design, allowing medicinal chemists to engineer analogs with improved stability, selectivity, or pharmacokinetic profiles. By enabling the screening and validation of new therapeutic candidates in preclinical research, it contributes to the advancement of next-generation anticoagulant strategies.
Assay development and validation: In laboratory diagnostics and high-throughput screening platforms, hirugen is employed as a reference inhibitor to calibrate and validate thrombin activity assays. Its reproducible inhibitory profile supports the standardization of assay conditions, ensuring reliable measurement of thrombin function in plasma, purified systems, or recombinant protein preparations. This role is critical for the quality control of reagents and the comparative assessment of new assay methodologies.
Hemostasis and thrombosis research: The peptide's capacity to modulate thrombin-dependent processes underpins its use in experimental models of coagulation, platelet activation, and vascular biology. Researchers leverage hirugen to dissect the contributions of thrombin exosite interactions in fibrin formation, platelet aggregation, and cellular signaling pathways. Such studies provide mechanistic insights into the regulation of hemostasis and the pathogenesis of thrombotic disorders, informing both basic science and translational research in the field of vascular biology.
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