Syndecan 4 Recombinant Rabbit Monoclonal Antibody [PSH0-72]

Function

Syndecan-4 is a transmembrane (type I) heparan sulfate proteoglycan that functions as a receptor in intracellular signaling. The protein is found as a homodimer and is a member of the syndecan proteoglycan family. Syndecan-4 interacts with extracellular matrix, anticoagulants, and growth-factors. It also regulates the actin cytoskeleton, cell adhesion, and cell migration. Syndecan-4 activates protein kinase C (PKC), an enzyme involved in signal transduction. The variable domain of syndecan-4 could be a site of self-association. The degree of oligomerization correlates with the activity of kinases, so the degree of clustering of syndecan-4 correlates to PKC activity. Syndecan-4 also binds to phosphatidylinositol (4,5)-bisphosphate (PIP2) through the variable domain and increases PKC activity ten-fold. Syndecan-4 is also a regulator of fibroblast growth factor-2 (FGF-2) signaling. Syndecan-4 binds to FGF and mediates interaction with the FGF receptor. Because the tight correlation between syndecan-4 and growth factors, the efficiency of angiogenic therapies have been thought to relate to syndecan-4. Growth factor signaling may be disrupted by changes in syndecan-4 expression. The cellular uptake, trafficking, and nuclear localization of FGF-2 could be increased by co-delivery of syndecan-4 proteoliposomes. These alterations should be considered in FGF-2-based therapies. Syndecan-4 is also associated with the healing process. Lack of Sdc4 gene causes delayed wound healing in mice. This delay may be due to compromised fibroblast motility.

Background References

1. Onyeisi JOS et al. Syndecan-4 as a Pathogenesis Factor and Therapeutic Target in Cancer. Biomolecules. 2021 Mar

2. Keller-Pinter A et al. Syndecan-4 in Tumor Cell Motility. Cancers (Basel). 2021 Jul

Subcellular Location

Membrane, Secreted.

UNIPROT

SwissProt: P31431 Human

Synonyms