In the realm of biochemical research and prot Substrate name: Z-DEVD-R110. •. Molecular weight: 1515.5. •.Peptide sequence: DEVD. •. Useful to measure: Caspase-3, -6, -7, -8, -10. •. Ex/Em of R110 product: Read more eomic analysis, the DEVD peptide s by QP Peterson·2010·Cited by 53—Described herein is a facile method for the synthesis of the Ac-DEVD-pNA caspase-3 substrate using solution-phasepeptidesynthesis.Read more equence stands as a cornerstone for understanding enzymatic activity. As someone who frequently works with synthetic peptides for experimental assays, I have found that the specific amino acid sequence of the PARP cleavage site—namely Asp-Glu-Val-Asp—is indispensable for high-precision studies.
Understanding the DEVD Peptide Sequence
The DEVD sequence is derived from the natural cleavage site found in poly(ADP-ribose) polymerase (PARP). When discussing the peptide sequence, it is essential to recognize that this tetrapeptide serves as a highly specific recognition motif. In my experience, the efficiency of a peptide linker cleaved by caspases depends heavily on maintaining the integrity of this Asp-Glu-Val-Asp (DEVD) arrangement.
Variations and Derivatives
Research often requires modified versions of this sequence to optimize detection sensitivity. Whether I am using Ac-DEVD-AFC or the fluorogenic Acetyl-Asp-Glu-Val-Asp-amidomethylcoumarin (Ac-DEVD-AMC), the core DEVD motif remains the functional engine of the molecule.
Key variations observed in laboratory settings include:
* Ac-DEVD-pNA: Frequently utilized as a colorimetric substrate where the DEVD motif ensures selective recognition.
* Z-DEVD-FMK: A potent inhibitor, where the Z-DEVD-FMK structure allows for irreversible Ac-DEVD-AMC binding, demonstrating how the peptide sequence can be engineered for different investigative purpo Z-DEVD-AMC ses.
* Ac-DEVD-CHO: A synthetic tetrapeptide competitive inhibitor that mirrors the PARP cleavage site DEVD.
Practical Application and Experimental Design
When selecting a substrate, the sequence DEVD provides the necessary specificity for detecting protease activity. For example, in Caspase-3 Substrate DEVD-AFC assays, the Sequence (1-letter): Ac-DEVD-AFC is a standard reference point for researchers. The experimental success often hinges on the Peptide Sequence 25—a parameter often cited in protocols—which emphasizes the purity and structural fidelity of the peptide.
From a technical standpoint, the DEVD peptide sequence is not merely a string of amino acids; it is a precision tool. Whether the goal is identifying the amino acid sequence of the PARP cleavage site in a new model or utilizing Z-DEVD-FMK to modulate enzyme interactions, the reliability of the DEVD motif is unmatched.
Conclusion
My personal engagement with these reagents has shown that the DEVD sequence remains the gold standard for specificity. By understanding the nuances of the peptide sequence, researchers can achieve highly reproducible results in their bench work. Whether you are using Ac-DEVD-AMC by AM Tang·2013·Cited by 21—Apeptide sequence,DEVD, is a specific substrate for CASP3 cleavage. Therefore, we envisioned that hydrogels formed withDEVDRead more or other DEVD-based derivatives, ensuring the quality of the peptide is the most critical step in successful experimental design. Always prioritize high-purity synthesized sequences to ensure that the DEVD motif functions exactly as intended within your specific biochemical framework.