PTBP1 α3-Helix Derived Peptide P1 (TFA) mimics a structured recognition element from the α3-helix of PTBP1. Hydrophobic and polar residues participate in RNA-binding surface reconstruction. Researchers study its inhibitory potential and conformational ensemble. Applications include RNA-protein interaction analysis, helix-mimetic design, and structural mechanistic studies.
CAT No: R2834
PTBP1 α3-helix derived peptide P1(TFA) is a synthetic peptide modeled after the α3-helix region of the polypyrimidine tract-binding protein 1 (PTBP1), a key RNA-binding protein involved in pre-mRNA splicing regulation. This peptide is designed to mimic structural and functional motifs from PTBP1, making it a valuable biochemical tool for dissecting protein-RNA interactions, studying splicing mechanisms, and exploring the structure-function relationship of RNA-binding domains. Its precise sequence and structural fidelity allow for targeted interrogation of PTBP1's role in post-transcriptional gene regulation, offering researchers a focused means to investigate the molecular underpinnings of RNA metabolism.
Protein-RNA interaction studies: As a structurally defined segment of PTBP1, the α3-helix derived peptide is widely employed in assays aimed at elucidating the specific contacts between PTBP1 and its RNA targets. By competing with or mimicking the native protein's binding interface, it enables detailed mapping of RNA recognition sites and facilitates the identification of critical residues involved in RNA affinity and specificity. Such studies advance the understanding of splicing factor-RNA interactions and inform the development of molecular probes for RNA biology.
Splicing mechanism analysis: Researchers utilize this peptide to probe the mechanistic basis of alternative splicing events governed by PTBP1. By introducing the α3-helix derived sequence into in vitro or cell-free splicing assays, it becomes possible to dissect the contribution of individual helices to exon inclusion or skipping decisions. This approach supports the functional dissection of modular domains within splicing regulators and helps clarify how discrete structural motifs influence spliceosome assembly and function.
Peptide-protein interaction mapping: The α3-helix region of PTBP1 is implicated in mediating protein-protein interactions that are essential for the assembly of splicing regulatory complexes. The peptide serves as a molecular probe for identifying and characterizing binding partners that interact with this domain, enabling pull-down assays, cross-linking experiments, or biophysical binding studies. Insights gained from such applications illuminate the broader protein interaction networks that underlie post-transcriptional gene regulation.
Structure-function relationship studies: The defined sequence and secondary structure of the α3-helix derived peptide provide a model system for investigating how specific helical motifs contribute to the overall architecture and dynamics of RNA-binding proteins. By employing techniques such as circular dichroism, NMR spectroscopy, or crystallography, researchers can analyze the conformational properties of the peptide and relate these to its functional activity. Such studies are instrumental in refining models of RNA-binding domain organization and in guiding rational design of peptide-based probes.
Peptide-based inhibitor development: Owing to its ability to recapitulate a critical interface within PTBP1, this synthetic peptide is explored as a template for the development of competitive inhibitors targeting PTBP1-mediated processes. By screening for modifications that enhance stability, affinity, or selectivity, researchers can leverage the α3-helix motif as a scaffold for generating tool compounds that modulate splicing factor function in research settings. These efforts support the broader use of peptide mimetics in the study of RNA processing pathways and the validation of novel biochemical targets.
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