Recombinant Rat Nectin-4 His-tag Protein, CF Summary
Tyr28-Val348, with a C-terminal 6-His tag
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
|Formulation||Lyophilized from a 0.2 μm filtered solution in PBS.|
|Reconstitution||Reconstitute at 500 μg/mL in PBS.|
|Shipping||The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
Immobilized Recombinant Rat Nectin‑4 (Catalog #9997-N4) supports the adhesion of NIH‑3T3 mouse embryonic fibroblastcells. The ED50 for this effect is 0.1‑0.8 μg/mL.
2 μg/lane of Recombinant Rat Nectin‑4 was resolved with SDS-PAGE underreducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Bluestaining, showing bands at 38-48 kDa.
Nectin-4, also known as Poliovirus receptor-related protein 4 (Gene name: PVRL4), is a 66-kDa type I transmembrane glycoprotein belonging to the Nectin immunoglobulin superfamily (1). The Latin word necto means "to connect", indicating the role of nectins in Ca2+‑independent cell-cell adhesion (2). Nectin-4 forms homodimers in cis, followed by interactions in trans with Nectin-1 or -4 (1‑3). Human Nectin-4 is normally expressed in the placenta, especially in endothelial cells, while in the mouse it is found in the embryo, lung, testis and brain (1, 4, 5). In many human ductal breast or non-small cell lung carcinomas, Nectin‑4 is up-regulated and a soluble 43-kDa form is found in the plasma (4-6). This form is generated from the membrane protein via the action of TACE/ADAM-17 (6). Nectin extracellular domains (ECDs) contain three Ig-like domains: an N‑terminal V-type that mediates ligand binding, and two C2-type (1, 3). Within the ECD, rat Nectin-4 shares 91%, and 97% amino acid sequence identity with human and mouse Nectin-4, respectively. In forming adherens junctions, trans interactions of Nectin-4 initiate cell-cell interactions and recruit intracellular cadherins through afadin and other junctional proteins (1, 2). These interactions organize the actin cytoskeleton, strengthen attachment to basement membrane and promote further cell-cell connections (2, 7). In humans, mutation of Nectin-4 has been correlated with ectodermal dysplasia-syndactyly syndrome, indicating a role for Nectin-4 in human development (7). High Nectin-4/PVRL4 expression was associated with poor-prognosis in some invasive breast cancers and may be a new promising prognostic biomarker and specific therapeutic target (8).
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- Takai, Y. et al. (2008) Nat. Rev. Mol. Cell Biol. 9:603.
- Fabre, S. et al. (2002) J. Biol. Chem. 277:27006.
- Fabre-Lafay, S. et al. (2007) BMC Cancer 7:73.
- Takano, A. et al. (2009) Cancer Res. 69:6694.
- Fabre-Lafay, S. et al. (2005) J. Biol. Chem. 280:19543.
- Brancati, F. et al. (2010) Am. J. Hum. Genet. 87:265.
- M-Rabet, M. et al. (2017) Ann Oncol. 28:769.
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