JAG-1, Scrambled

Product Name: JAG-1, Scrambled

Sequence One Letter Code: RCGPDCFDNYGRYKYCF

Sequence Three Letter Code: H-Arg-Cys-Gly-Pro-Asp-Cys-Phe-Asp-Asn-Tyr-Gly-Arg-Tyr-Lys-Tyr-Cys-Phe-OH

Chemical Formula:C93H127N25O26S3

Molecular Weight: 2107.5

Purity: 95%

Form: Lyophilized

Storage Conditions: - 20 °C

Research Area: Cancer Disease Research

Source / Species: human

Conjugation: Unconjugated

Code Nacres: NA.26

Application: This peptide is a scrambled sequence derived from Jagged-1 (188–204), a ligand involved in the Notch signaling pathway that regulates cell fate determination, differentiation, and developmental processes. Because the amino acid sequence order is randomized, the peptide does not retain the structural features required for productive Notch receptor activation. It is therefore commonly used as a negative control in experiments examining Jagged–Notch interactions and downstream signaling events. The scrambled design allows researchers to distinguish sequence-specific biological effects from nonspecific peptide activity in functional assays. This control peptide is particularly useful in studies investigating Notch pathway modulation, ligand–receptor recognition, and signaling specificity. It can be applied in biochemical assays, cell-based signaling experiments, and developmental biology studies where Jagged-1–derived peptides are used to probe Notch receptor activation and related transcriptional responses.

Current Research: The Notch signaling pathway is a highly conserved cell–cell communication system that plays a central role in regulating cell fate decisions, differentiation, and tissue development. Precise activation of this pathway depends on interactions between membrane-bound ligands and Notch receptors on adjacent cells. Among these ligands, Jagged-1 is one of the most extensively studied and functions as an important regulator of developmental and homeostatic processes. To investigate Jagged-1–mediated signaling mechanisms, researchers frequently use synthetic peptides derived from functional regions of the protein. In these experiments, scrambled Jagged-1 peptides serve as essential negative controls, enabling accurate interpretation of sequence-specific signaling events. The Notch Signaling Pathway Notch signaling is a cell contact–dependent pathway that regulates gene expression through direct communication between neighboring cells. In mammals, the pathway involves four Notch receptors (Notch1–4) and several ligands, including members of the Delta-like (DLL) and Jagged protein families. When a ligand such as Jagged-1 binds to a Notch receptor on a neighboring cell, the receptor undergoes a series of proteolytic cleavage events. These cleavages release the Notch intracellular domain (NICD), which translocates to the nucleus and interacts with transcriptional regulators to activate target genes. These genes control processes such as cell proliferation, differentiation, apoptosis, and lineage specification. Because Notch signaling influences numerous developmental pathways—including those involved in neurogenesis, vascular development, and immune cell differentiation—precise experimental tools are required to study how ligand–receptor interactions regulate this pathway. Jagged-1 and Its Role in Notch Activation Jagged-1 is a transmembrane ligand that binds directly to Notch receptors, initiating signaling events that influence cell fate decisions. The protein contains several domains involved in receptor recognition and activation, including the DSL domain (Delta/Serrate/Lag-2) and multiple epidermal growth factor–like repeats. In experimental studies, peptides derived from specific regions of Jagged-1—such as the 188–204 amino acid segment—are sometimes used to probe aspects of ligand-mediated receptor activation. These peptides can mimic certain features of the ligand and help researchers investigate how sequence elements contribute to receptor binding or signaling modulation. However, when studying signaling pathways, it is essential to ensure that observed biological effects are truly caused by the specific peptide sequence rather than nonspecific interactions. This is where scrambled peptide controls become important. Design of Scrambled Control Peptides A scrambled peptide contains the same amino acid composition as the original sequence but arranged in a randomized order. Because the sequence is rearranged, the peptide no longer preserves the structural motifs or binding interfaces required for biological activity. In the case of the scrambled Jagged-1 (188–204) peptide, the amino acids derived from the Jagged-1 segment are reordered in a nonfunctional configuration. This design ensures that the peptide lacks the structural features needed to interact productively with Notch receptors. Importantly, the scrambled peptide maintains similar length, charge distribution, and overall amino acid composition as the original peptide. This similarity allows researchers to control for nonspecific effects that may arise from peptide presence in experimental systems, such as interactions with membranes or general protein-binding surfaces. Role as a Negative Control in Notch Signaling Experiments Scrambled peptides are widely used as negative controls in biochemical and cellular experiments. When a functional Jagged-1–derived peptide is tested for its ability to influence Notch signaling, the scrambled peptide provides a baseline reference for evaluating whether observed effects depend on the specific amino acid sequence. For example, in cell-based assays measuring Notch activation, researchers may treat cells with the Jagged-1 peptide and compare the results to cells treated with the scrambled version. If only the authentic sequence induces changes in gene expression or signaling activity, the effect can be attributed to sequence-specific ligand–receptor interactions. Similarly, in biochemical assays examining protein–protein interactions, the scrambled peptide helps confirm that binding events are not caused by nonspecific peptide interactions. Applications in Notch Pathway Research The scrambled Jagged-1 control peptide is particularly useful in studies investigating the molecular mechanisms of Notch receptor activation and signaling specificity. Common applications include: Cell-based signaling assays measuring Notch pathway activation Ligand–receptor binding studies evaluating sequence-dependent interactions Functional assays examining transcriptional responses to Jagged-1 peptides Developmental biology experiments exploring Notch-mediated differentiation pathways Because Notch signaling influences diverse biological processes, reliable experimental controls are critical for distinguishing true pathway modulation from nonspecific effects. Supporting Studies of Development and Cell Fate Regulation Notch signaling governs many developmental events, including stem cell maintenance, tissue patterning, and organogenesis. Dysregulation of the pathway has also been implicated in several diseases, including cancer, congenital disorders, and immune dysfunction. Tools that allow researchers to carefully dissect ligand–receptor interactions are therefore essential for understanding how Notch signaling operates in both normal and pathological contexts. Scrambled peptide controls provide an important experimental safeguard that helps ensure accurate interpretation of results. A Reliable Control for Sequence-Specific Studies The scrambled Jagged-1 (188–204) peptide serves as a practical negative control for experiments investigating Jagged-Notch interactions. By preserving amino acid composition while eliminating the functional sequence order, it allows researchers to differentiate sequence-specific signaling effects from nonspecific peptide activity. As a result, this control peptide is widely used in biochemical assays, cellular signaling experiments, and developmental studies examining the mechanisms and specificity of Notch pathway modulation.