Human Contactin-2/TAG1 Antibody Summary
Accession # Q02246
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Detection of Human Contactin‑2/TAG1 by Western Blot. Western blot shows lysates of human cerebellum tissue. PVDF membrane was probed with 1 µg/mL of Mouse Anti-Human Contactin-2/TAG1 Monoclonal Antibody (Catalog # MAB17141) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF018). A specific band was detected for Contactin-2/TAG1 at approximately 135 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Preparation and Storage
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Contactin-2 (CNTN2), also called TAG-1 (transient axonal glycoprotein), TAX1 (transiently-expressed axonal glycoprotein), or axonin-1, is a 135 kDa glycosyl‑phosphatidylinositol (GPI)- anchored cell adhesion molecule that belongs to the contactin subfamily within the immunoglobulin (Ig) protein superfamily (1‑3). Human Contactin-2 cDNA encodes a 28 amino acid (aa) signal peptide, a 984 aa mature secreted protein with six Ig-like domains followed by four fibronectin type III‑like repeats, and a 28 aa C-terminal GPI anchor pro-sequence. GPI-specific phospholipase activity can release soluble, active Contactin-2 from the membrane (2). Mature human Contactin-2 shares approximately 93%, 93% and 75% aa sequence identity with human, rat and chicken Contactin-2, respectively. During development, Contactin-2 is expressed by a subset of neuronal populations in the central nervous system (CNS) and peripheral nervous system (PNS), particularly during initial phases of axon outgrowth (3‑5). Both the 135 kDa form and a 90 kDa form are also upregulated in response to CNS injury in the adult (6). Data support a role for Contactin-2 in axon pathfinding, neurite outgrowth and adhesion, especially in the CNS (36). In mature myelinated fibers, Contactin-2 is expressed by oligodendrocytes and Schwann cells, which are myelinating glial cells of the CNS and PNS, respectively (7, 8). It is enriched in the juxtaparanodal regions, where it recruits caspr2 (Contactin-associated protein 2), a transmembrane neurexin involved in cell adhesion and intercellular communication (7‑10). The axonal Contactin-2 interacts in cis with caspr2, and in trans with another Contactin-2 on the glial membrane (8). This ternary complex is required for the accumulation and organization of K+ channels in the juxtaparanodes (9).
- Wolfer, D. & R. J. Giger (1994) Swissprot accession # Q61330.
- Hasler, T.H. et al. (1993) Eur. J. Biochem. 211:329.
- Karagogeos, D. (2003) Front. Biosci.8:s1304.
- Liu, Y. & M.C. Halloran (2005) J. Neurosci. 25:10556.
- Denaxa, M. et al. (2005) Dev. Biol. 288:87.
- Soares, S. et al. (2005) Eur. J. Neurosci. 21:1169.
- Traka, M. et al. (2002) J. Neurosci. 22:3016.
- Poliak, S. and E. Peles (2003) Nature Reviews Neurosci. 4:968.
- Traka, M. et al. (2003) J. Cell Biol. 162:1161.
- Poliak, S. et al. (2003) J. Cell Biol. 162:1149.
Citations for Human Contactin-2/TAG1 Antibody
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Citations: Showing 1 - 2
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Molecular Markers in Maternal Blood Exosomes Allow Early Detection of Fetal Alcohol Spectrum Disorders
Authors: N Darbinian, A Darbinyan, J Sinard, G Tatevosian, N Merabova, F D'Amico, T Khader, A Bajwa, D Martirosya, AK Gawlinski, R Pursnani, H Zhao, S Amini, M Morrison, L Goetzl, ME Selzer
International Journal of Molecular Sciences, 2022-12-21;24(1):.
Sample Types: Exosomes
Applications: Flow Cytometry
Intrathecal CD4(+) and CD8(+) T-cell responses to endogenously synthesized candidate disease-associated human autoantigens in multiple sclerosis patients.
Authors: van Nierop G, Janssen M, Mitterreiter J, van de Vijver D, de Swart R, Haagmans B, Verjans G, Hintzen R
Eur J Immunol, 2015-11-09;46(2):347-53.
Sample Types: Whole Cells
Applications: Flow Cytometry
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