Human IGSF4B/SynCAM3 Antibody

  
  • Species Reactivity
    Human
  • Specificity
    Detects human IGSF4B/SynCAM3 in direct ELISAs and Western blots. In direct ELISAs, approximately 5% cross‑reactivity with recombinant human (rh) IGSF4C is observed and less than 2% cross-reactivity with rhIGSF4, rhIGSF4D, and rhIGSF8 is observed.
  • Source
    Polyclonal Goat IgG
  • Purification
    Antigen Affinity-purified
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human IGSF4B/SynCAM3 isoform 1
    Pro21-Tyr329
    Accession # Q8N126
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    0.1 µg/mL
    Recombinant Human IGSF4B/SynCAM3 (Catalog # 3678-S4)
  • Flow Cytometry
    2.5 µg/106 cells
    Human differentiated neuron progenitor cells
  • CyTOF-ready
    Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.
  • Immunocytochemistry
    5-15 µg/mL
    See below
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.
Data Examples
Immunocytochemistry
IGSF4B/SynCAM3 in BG01V Human Embryonic Stem Cells. IGSF4B/SynCAM3 was detected in immersion fixed BG01V human embryonic stem cells differentiated into neurons using Goat Anti-Human IGSF4B/SynCAM3 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3678) at 10 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Goat IgG Secondary Antibody (red; Catalog # NL001) and counterstained with DAPI (blue). Specific staining was localized to cytoplasm. View our protocol for Fluorescent ICC Staining of Stem Cells on Coverslips.
Preparation and Storage
  • Reconstitution
    Reconstitute at 0.2 mg/mL in sterile PBS.
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
  • Stability & Storage
    Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
    • 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.
Background: IGSF4B/SynCAM3

IGSF4B (immunoglobulin superfamily member 4B), also called CADM3, TSLL1, Necl‑1 or SynCAM-3, is a neural tissue-specific member of the nectin-like family of immunoglobulin superfamily (1, 2). It is a 48‑50 kDa type I transmembrane (TM) glycoprotein that is concentrated at non-junctional contact sites of neuronal axons and glial processes (2, 3). In myelinated peripheral nerve fibers, IGSF4B is concentrated at nodes of Ranvier in contact sites of Schwann cells (2). The 398 amino acid (aa) human IGSF4B contains a 24 aa signal sequence, a 306 aa extracellular domain (ECD), a 21 aa transmembrane domain and a 47 aa cytoplasmic domain. The ECD contains an N-terminal V-type Ig-like domain that is responsible for Ca++-independent homophilic and heterophilic interactions with Nectin-1, Nectin-3 or Necl‑2 (IGSF-4) in trans. It also contains two C2-type Ig-like domains that are responsible for Ca++-independent homophilic dimerization in cis that is thought to precede trans interaction (2, 4, 5). The cytoplasmic domain binds members of the MAGUK guanylate kinase subfamily, such as Dlg3, Pals2 and CASK (2). These activities are thought to play roles in adhesion and architecture at the synapse (2). We have also shown that IGSF4B promotes in vitro outgrowth of cortical neurons. Of two known splice variants, one shows an insertion of 34 aa near the mature N-terminus and probably represents a 60 kDa form. A smaller variant shows deletions of aa 185‑231, and 281‑398, which includes the first C2-type Ig-like domain and the TM segment. The IGSF4B ECD is highly conserved, sharing 95‑96% aa identity between human mouse, rat, canine and bovine sequences. The ECD of IGSF4A, B, C and D proteins share 35‑50% aa identity.

  • References:
    1. Fukuhara, H. et al. (2001) Oncogene 20:5401.
    2. Kakunaga, S. et al. (2005) J. Cell Sci. 118:1267.
    3. Fukami, T. et al. (2003) Gene 323:11.
    4. Shingai, T. et al. (2003) J. Biol. Chem. 278:35421
    5. Dong, X. et al. (2006) J. Biol. Chem. 281:10610.
  • Long Name:
    Immunoglobulin Superfamily, Member 4B
  • Entrez Gene IDs:
    57863 (Human); 94332 (Mouse); 360882 (Rat)
  • Alternate Names:
    BIgR; Brain immunoglobulin receptor; CADM3; cell adhesion molecule 3; IGSF4B; IGSF4BSynCAM3; Immunoglobulin superfamily member 4B; member 4B; Necl-1; NECL1TSLC1-like protein 1; Nectin-like protein 1; Synaptic cell adhesion molecule 3; SynCAM3; TSLC1-like 1; TSLL1; TSLL1SYNCAM3
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