Boc-Gln-Arg-Arg-pNA is a chromogenic substrate featuring a di-arginine recognition element linked to p-nitroanilide. The Boc-protected N-terminus tunes charge and solubility while preserving cleavage specificity. Researchers monitor p-nitroaniline release to characterize trypsin-like protease kinetics. Applications include enzyme profiling, inhibitor screening, and substrate-design studies.
CAT No: R2735
Boc-Gln-Arg-Arg-pNA is a synthetic peptide substrate featuring a para-nitroanilide (pNA) reporter group, widely utilized in enzymology and protease research. As a protected tripeptide, it incorporates a Boc (tert-butyloxycarbonyl) group at the N-terminus, with a sequence composed of glutamine, arginine, and arginine, and is capped at the C-terminus with a chromogenic pNA moiety. The specific arrangement of amino acids and the pNA group renders this compound highly valuable for monitoring proteolytic activity, particularly in the study of serine proteases such as trypsin-like enzymes. Its design enables sensitive, quantitative detection of enzymatic cleavage events, making it a staple in biochemical assays investigating substrate specificity, enzyme kinetics, and inhibitor screening.
Enzyme activity assays: As a chromogenic peptide substrate, Boc-Gln-Arg-Arg-pNA is extensively applied in the quantitative measurement of protease activity, especially for enzymes exhibiting trypsin-like specificity. Upon enzymatic cleavage of the peptide bond adjacent to the pNA group, the release of free para-nitroaniline produces a measurable yellow color, enabling precise spectrophotometric monitoring. This facilitates kinetic analysis of enzyme activity, allowing researchers to determine catalytic parameters and assess enzyme function under various experimental conditions.
Substrate specificity profiling: The peptide sequence of Boc-Gln-Arg-Arg-pNA is strategically designed to probe the substrate recognition preferences of serine proteases and related enzymes. By serving as a model substrate, it enables the elucidation of enzyme-substrate interaction mechanisms, mapping of active site preferences, and comparison of proteolytic profiles across enzyme variants. Such studies are critical for understanding the molecular determinants of protease specificity and for guiding the rational design of selective inhibitors or engineered enzymes.
Inhibitor screening and characterization: The chromogenic properties of this peptide substrate make it highly suitable for high-throughput screening and detailed kinetic analysis of protease inhibitors. Researchers employ it in biochemical assays to rapidly evaluate the potency and mechanism of candidate inhibitory compounds by monitoring their effects on substrate cleavage rates. This application is integral to drug discovery efforts targeting serine proteases, as well as to the development of research tools for dissecting proteolytic pathways.
Protease purification and quality control: Boc-Gln-Arg-Arg-pNA is also utilized in the purification and quality assessment of protease preparations. Its substrate properties allow for the sensitive detection of residual proteolytic activity during enzyme isolation, purification, and storage. By providing a straightforward readout of functional enzyme presence, it supports the optimization of purification protocols and ensures consistency in enzyme preparations used for downstream research applications.
Biochemical pathway elucidation: The use of this synthetic peptide substrate extends to the investigation of proteolytic cascades and regulatory networks involving serine proteases. By facilitating the monitoring of specific cleavage events within complex biological samples, it aids in mapping protease activation sequences, identifying intermediate products, and clarifying the roles of individual enzymes within broader biochemical pathways. This contributes to a deeper understanding of protease-mediated processes in physiology and disease models, supporting advances in basic and applied research.
If you have any peptide synthesis requirement in mind, please do not hesitate to contact us at . We will endeavor to provide highly satisfying products and services.
Creative Peptides is a trusted CDMO partner specializing in high-quality peptide synthesis, conjugation, and manufacturing under strict cGMP compliance. With advanced technology platforms and a team of experienced scientists, we deliver tailored peptide solutions to support drug discovery, clinical development, and cosmetic innovation worldwide.
From custom peptide synthesis to complex peptide-drug conjugates, we provide flexible, end-to-end services designed to accelerate timelines and ensure regulatory excellence. Our commitment to quality, reliability, and innovation has made us a preferred partner across the pharmaceutical, biotechnology, and personal care industries.
Read More