Human Semaphorin 4A PE-conjugated Antibody

FAB4694P has been discontinued. View all Semaphorin 4A products.
  
  • Species Reactivity
    Human
  • Specificity
    Detects human Semaphorin 4A in direct ELISAs. In direct ELISAs, 50%-100% cross-reactivity with recombinant human (rh) Semaphorin 4C and rhSemaphorin 4G is observed, and less than 5% cross-reactivity with rhSemaphorin 4B, 4D, and recombinant mouse Semaphorin 4A is observed.
  • Source
    Monoclonal Mouse IgG1 Clone # 741531
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human Semaphorin 4A
    Gly32-His683
    Accession # Q9H3S1
  • Formulation
    Supplied in a saline solution containing BSA and Sodium Azide.
  • Label
    Phycoerythrin
Applications
  •  
    Recommended
    Concentration
    Sample
  • Flow Cytometry
    10 µL/106 cells
    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
Detection of Semaphorin 4A in Human Blood Lymphocytes by Flow Cytometry. Human peripheral blood lymphocytes either untreated (A) or treated with PMA and Calcium Ionomycin (B) were stained with Mouse Anti-Human Semaphorin 4A PE‑conjugated Monoclonal Antibody (Catalog # FAB4694P) and Mouse Anti-Human CD19 APC‑conjugated Monoclonal Antibody (Catalog # FAB4867A). Quadrant markers were set based on control antibody staining (Catalog # IC002P). View our protocol for Staining Membrane-associated Proteins.
Preparation and Storage
  • Shipping
    The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
  • Stability & Storage
    Protect from light. Do not freeze.
    • 12 months from date of receipt, 2 to 8 °C as supplied.
Background: Semaphorin 4A
Semaphorin 4A (Sema4A, previously semB) is a Class 4 transmembrane Semaphorin with activity in the immune and nervous systems (1). The 761 amino acid (aa) human Sema4A precursor contains a 32 aa signal sequence, a 651 aa extracellular domain (ECD) containing sema, PSI and C2-type immunoglobulin domains, a 21 aa transmembrane domain, and a 57 aa cytoplasmic domain with two Ser/Thr phosphorylation sites (2). Human Sema4A ECD shares 87%, 87%, 86% and 85% aa identity with mouse, rat, bovine and canine Sema4A, respectively, and shares 32-37% aa identity with other human Sema4 family members. Of six reported splice variants with 723, 629, 370, 321, 236 and 220 aa, five lack the N-terminus and/or portions of the sema domain, and three lack the transmembrane and cytoplasmic domains in the C-terminus (3). Sema4A was first described as a molecule that enhances T cell activation and interacts with TIM-2 (T cell immunoglobulin and mucin domain-2 (4). Mice with targeted disruption of Sema4A show defects in dendritic cell-mediated T cell priming and Th1 responses (5). Roles for Sema4A have also been identified in the brain, the endothelium and the eye. It mediates hippocampal neuron growth cone collapse in vitro through interaction of the sema domain with Plexin-B1 (6). Interaction of Sema4A with endothelial cell Plexin-D1 causes opposition to the angiogenic, proliferative, chemotactic and integrin-mediated adhesive actions of VEGF (7). The retina of Sema4A-/- mice shows severe degeneration, and mutations of Sema4A are associated with retinitis pigmentosa and cone rod dystrophy in humans (8, 9).
  • References:
    1. Kumanogoh, A. et al. (2003) J. Cell Sci. 116:3463.
    2. Swissprot Accession # Q9H3S1.
    3. Entrez Accession # CAI15528, CAI15529, CAI15531, CAI15532, CAI15533 and EAW52993.
    4. Kumanogoh, A. et al. (2002) Nature 419:629.
    5. Kumanogoh, A. et al. (2005) Immunity 22:305.
    6. Yukawa, K. et al. (2005) Int. J. Mol. Med. 16:115.
    7. Toyofuku, T. et al. (2007) EMBO J. 26:1373.
    8. Rice, D.S. et al. (2004) Invest. Ophthalmol. Vis. Sci. 45:2767.
    9. Abid, A. et al. (2007) J. Med. Genet. 43:378.
  • Entrez Gene IDs:
    64218 (Human); 20351 (Mouse); 310630 (Rat)
  • Alternate Names:
    CORD10; RP35; Sema B; sema domain, immunoglobulin domain (Ig), transmembrane domain (TM) and shortcytoplasmic domain, (semaphorin) 4A; SEMA4A; SEMAB; Semaphorin 4A; semaphorin-4A; semaphorin-B; SEMB; SEMBFLJ12287
Related Research Areas

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