Catalog # PX4445

phospho-Plexin D1 (Tyr-1642) Peptide

Blocking Peptide

Application / Dilution
ELISA50 ng/well

Size 50 μg



Plexins are a family of large integral membrane proteins that complex with neuropilins to form semaphorin co-receptors. The extracellular region of plexins contains a semaphorin domain, multiple glycine-rich motifs, and MET-related sequences. The cytoplasmic region contains a Sex/Plexin domain and putative tyrosine phosphorylation sites that mediate signal transduction after activation. Plexin D1 is a type I transmembrane protein that may be expressed as multiple isoforms in many cell types, including neurons and endothelial cells. Semaphorin 3E (Sema-3E) and semaphorin 4A can bind Plexin D1, and ligand binding leads to phosphorylation of Tyr-1642 and activation of Plexin D1. Sema-3E and its receptor are important for angiogenesis that occurs during blood vessel development and repair. In cancers, Sema-3E and Plexin D1 are expressed in tumor tissues and cancer cells, and the interaction of these molecules may promote cancer cell migration and metastic spreading. Thus, Plexin D1, and its ligand Sema-3E, may be important regulators of angiogenesis and metastasis.



Casazza, A. et al. (2010) J Clin Invest. 120(8):2684.
Deutsch, U. (2004) Dev Cell. 7(1):1.
van der Zwaag, B. et al. (2002) Dev Dyn. 2002 Nov;225(3):336-43.

Phospho-Plexin D1 (Tyr-1642) synthetic peptide corresponds to amino acids surrounding Tyr-1642 in human Plexin D1. This sequence is well conserved in rat and mouse Plexin D1. This tyrosine site is conserved in many other Plexin family members, but the surrounding amino acids have several amino acid differences compared to Plexin D1.

*For more information, see UniProt Accession Q9Y4D7
Blocking Peptide is supplied in 50µl phosphate-buffered saline and 0.05% sodium azide.

The products are are safely shipped at ambient temperature for both domestic and international shipments. Each product is guaranteed to match the specifications as indicated on the corresponding technical data sheet. Please store at -20C upon arrival for long term storage.

The peptide is specifically recognized by anti-Plexin D1 (Tyr-1642) phospho-specific antibody (PP4441) in ELISA, and has been shown to block the reactivity of PP4441 during Western blot. In addition, the peptide is recommended for use in blocking PP4441 reactivity in immunocytochemistry.

*All molecular weights (MW) are confirmed by comparison to Bio-Rad Rainbow Markers and to western blot mobilities of known proteins with similar MW.

This kit contains: