Render Target: STATIC
Render Timestamp: 2025-03-14T11:05:59.725Z
Commit: a619ae74f66dae0f27639e88da12bcf600e46428
XML generation date: 2025-03-07 13:19:17.911
Product last modified at: 2025-03-08T08:03:17.040Z
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PDP - Template Name: Monoclonal Antibody
PDP - Template ID: *******c5e4b77
R Recombinant
Recombinant: Superior lot-to-lot consistency, continuous supply, and animal-free manufacturing.

Semaphorin-4A (E5N3K) Rabbit mAb #57331

Filter:
  • WB
  • IHC
  • F

    Supporting Data

    REACTIVITY H
    SENSITIVITY Endogenous
    MW (kDa) 90
    Source/Isotype Rabbit IgG
    Application Key:
    • WB-Western Blotting 
    • IHC-Immunohistochemistry 
    • F-Flow Cytometry 
    Species Cross-Reactivity Key:
    • H-Human 

    Product Information

    Product Usage Information

    Application Dilution
    Western Blotting 1:1000
    Immunohistochemistry (Paraffin) 1:500 - 1:2000
    Flow Cytometry (Fixed/Permeabilized) 1:200 - 1:800

    Storage

    Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/mL BSA, 50% glycerol, and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

    For a carrier free (BSA and azide free) version of this product see product #35176.

    Protocol

    Specificity / Sensitivity

    Semaphorin-4A (E5N3K) Rabbit mAb recognizes endogenous levels of total Semaphorin-4A protein. An unknown background band is detected at 55 kDa in some cell lines.

    Species Reactivity:

    Human

    Source / Purification

    Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Leu756 of human Semaphorin-4A protein.

    Background

    Semaphorin-4A, or Sema4A, is a membrane-type class IV semaphorin family member glycoprotein and is expressed in dendritic cells, B cells, T cells, and endothelial cells (1). The protein structure consists of an N-terminus signal peptide, a sema domain, a C2 type Ig domain, a transmembrane region, and a cytoplasmic tail (2). Semaphorin-4A exerts diverse biological effects through several different receptor-mediated pathways and plays important roles in immunity, angiogenesis, neuronal migration, and tumor progression. Semaphorin-4A enhances T cell activation by interacting with TIM-2, and T cell-derived Semaphorin-4A plays a role in helper T cell (Th) differentiation (3,4). In regulatory T cells (Tregs), Semaphorin-4A plays an important role in enhancing stability through interactions with neuropilin-1 (Nrp1) (5). Semaphorin-4A interacts with PlexinD1, which is expressed in endothelial cells and negatively regulates angiogenesis (6). In presynaptic neurons, Semaphorin-4A promotes the development of inhibitory or excitatory synapses through interactions with PlexinB1 or PlexinB2, respectively (7). Semaphorin-4A has been identified as a therapeutic target to promote antitumor responses, and its expression in the tumor microenvironment (TME) has been suggested as a biomarker to predict response to immunotherapy (8).
    For Research Use Only. Not For Use In Diagnostic Procedures.
    Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
    KARPAS cell line source: Dr. Abraham Karpas at the University of Cambridge.
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