Polypyrimidine tract-binding protein 1 isoform b (359-373)

Polypyrimidine tract-binding protein 1 isoform b (359-373) is a synthetic peptide fragment derived from the RNA-binding protein PTBP1, specifically representing amino acid residues 359 to 373 of its isoform b. As a functionally significant region within the PTBP1 sequence, this peptide encompasses a portion of the protein known to participate in RNA recognition and splicing regulation. Its defined sequence and structural features make it an invaluable tool for probing the molecular mechanisms of RNA processing, protein-RNA interactions, and post-transcriptional gene regulation in eukaryotic systems. Researchers working in molecular biology, biochemistry, and cellular signaling fields utilize this peptide to elucidate the roles of PTBP1 in diverse cellular contexts.

Peptide-protein interaction studies: The 359-373 fragment of PTBP1 serves as a model substrate for investigating specific peptide-protein interactions, particularly those involving RNA-binding domains and associated regulatory proteins. By providing a defined segment of the full-length PTBP1, it enables detailed mapping of binding sites and interaction motifs, facilitating the identification of critical residues that mediate recognition events. Such studies are essential for understanding the molecular basis of splicing factor recruitment and the assembly of ribonucleoprotein complexes.

Epitope mapping and antibody development: As a chemically synthesized peptide corresponding to a unique region of PTBP1 isoform b, this product is highly suitable for use as an antigen in the generation and validation of sequence-specific antibodies. Employing this peptide in immunization protocols or binding assays allows researchers to develop antibodies that selectively recognize the 359-373 epitope, thereby improving the specificity of immunodetection methods for PTBP1 isoforms in cell lysates, tissue samples, or biochemical assays.

Functional assays in splicing regulation: The peptide may be applied in in vitro splicing assays or competitive inhibition experiments to dissect the functional contributions of the PTBP1 359-373 region to pre-mRNA processing. By introducing the peptide into reconstituted splicing systems or cell extracts, researchers can assess its capacity to modulate spliceosome assembly, RNA binding, or the activity of endogenous PTBP1, providing mechanistic insights into the regulation of alternative splicing events.

Structural and conformational analysis: The defined sequence of this peptide enables its use in structural biology applications, such as nuclear magnetic resonance (NMR) spectroscopy or circular dichroism (CD) studies. By analyzing the conformation and dynamics of the 359-373 segment in isolation or in complex with interacting partners, scientists can gain a deeper understanding of the structural determinants that govern PTBP1 function and its interaction with RNA or other regulatory proteins.

Post-translational modification research: The PTBP1 359-373 peptide includes residues that may serve as potential sites for post-translational modifications, such as phosphorylation or methylation. Synthesized peptides of this region are frequently employed as substrates in enzymatic assays, mass spectrometry-based detection, or mapping studies to characterize modification patterns and their functional consequences. Such research is crucial for unraveling the regulatory networks that modulate PTBP1 activity in response to cellular signaling cues.

1. An Open-label, Single-center, Safety and Efficacy Study of Eyelash Polygrowth Factor Serum

2. Tachykinin-related peptides modulate immune-gene expression in the mealworm beetle Tenebrio molitor L

3. Multifunctional peptide-oligonucleotide conjugate promoted sensitive electrochemical biosensing of cardiac troponin I

4. Low bone turnover and low BMD in Down syndrome: effect of intermittent PTH treatment

5. Relatedness of antibodies to peptides containing homocitrulline or citrulline in patients with rheumatoid arthritis