TB500

Origin & Classification

TB-500 is the synthetic name for a fragment of thymosin beta-4, a 43-amino-acid actin-sequestering protein widely expressed in mammalian tissues. The synthetic peptide replicates the active region of thymosin beta-4 and is produced via solid-phase peptide synthesis. It falls within the class of actin-binding peptides and is used as a research tool to study cytoskeletal regulation.

Mechanism & Research Context

TB-500 binds to monomeric actin (G-actin), preventing its polymerization into filamentous actin (F-actin) and thereby influencing the dynamics of cytoskeletal assembly. This interaction modulates cell migration, angiogenesis, and extracellular matrix remodeling. Researchers employ TB-500 to investigate mechanisms underlying wound repair, fibrosis, and cell motility. Studies examine how actin sequestration affects focal adhesion formation, integrin signaling, and downstream pathways such as Rho GTPase regulation. TB-500 is also used to explore interactions with growth factors like VEGF and TGF-beta, and the peptide provides a platform to dissect the role of actin dynamics in cellular homeostasis and tissue adaptation.

Composition & Quality

TB-500 is supplied as a lyophilized peptide with purity usually exceeding 95 %, determined by HPLC and mass spectrometry. It is synthesized under GMP-aligned conditions, with purification steps, sterile filtration, and analytical testing to ensure absence of contaminants. Quality control includes verification of sequence, peptide content, and endotoxin levels. The peptide is stable when stored desiccated and refrigerated; reconstituted solutions should be used promptly. Certificates of analysis accompany each batch, providing details on purity, sequence confirmation, and storage recommendations.

Summary & Unified Disclaimer

This description summarizes the scientific context of the molecule. It is provided for educational and research discussion purposes only. It is not intended to diagnose, treat, cure, or prevent any disease, and no medical or consumption claims are made.