Human Siglec-3/CD33 Antibody

(1 citations)
(1 Review)
  
  • Species Reactivity
    Human
  • Specificity
    Detects human Siglec‑3/CD33 in direct ELISAs and Western blots. In direct ELISAs and Western blots, no cross-reactivity with recombinant human Siglec-2, -5, -7, or -9 is observed.
  • Source
    Monoclonal Mouse IgG1 Clone # 6C5/2
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Recombinant human Siglec‑3/CD33
    Extracellular domain
  • 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
    1 µg/mL
    Recombinant Human Siglec-3/CD33 Fc Chimera (Catalog # 1137-SL) under non-reducing conditions only
  • Flow Cytometry
    2.5 µg/106 cells
    Human whole blood granulocytes
  • CyTOF-ready
    Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.
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.
Preparation and Storage
  • Reconstitution
    Reconstitute at 0.5 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: Siglec-3/CD33

Siglecs (sialic acid binding Ig-like lectins) are I-type (Ig-type) lectins belonging to the Ig superfamily. They are characterized by an N‑terminal Ig-like V-type domain which mediates sialic acid binding, followed by varying numbers of Ig-like C2-type domains (1, 2). Eleven human Siglecs have been cloned and characterized. They are sialoadhesin/CD169/Siglec-1, CD22/Siglec-2, CD33/Siglec-3, Myelin-Associated Glycoprotein (MAG/Siglec-4a) and Siglecs 5 to 11 (1‑3). To date, no Siglec has been shown to recognized any cell surface ligand other than sialic acids, suggesting that interactions with glycans containing this carbohydrate are important in mediating the biological functions of Siglecs. Siglecs 5 to 11 share a high degree of sequence similarity with CD33/Siglec-3 both in their extracellular and intracellular regions. They are collectively referred to as CD33-related Siglecs. One remarkable feature of the CD33-related Siglecs is their differential expression pattern within the hematopoietic system (1, 2). This fact, together with the presence of two conserved immunoreceptor tyrosine-based inhibition motifs (ITIMs) in their cytoplasma tails, suggests that CD33-related Siglecs are involved in the regulation of cellular activation within the immune system.

Human Siglec-3 is alternatively known as myeloid cell surface antigen CD33 and GP67. Human Siglec-3 cDNA encodes a 364 amino acid (aa) polypeptide with a hydrophobic signal peptide, an N-terminal Ig-like V-type domain, one Ig-like C2-type domains, a transmembrane region and a cytoplasmic tail (1, 4). Siglec-3 expression is restricted to cells of myelomonocytic lineage (2). It binds sialic acid preferring alpha 2,3- linkage over alpha 2,6- linkage (5). Studies indicated that Siglec-3 recruits SHP-1 and SHP-2 to its ITIMs (6, 7). When co-crosslinking with Fc gamma R1, Siglec-3 inhibits tyrosine phosphorylation and calcium mobilization, suggesting Siglec-3 can mediate inhibitory signals (7).

  • References:
    1. Crocker, P.R. and A. Varki (2001) Trends Immunol. 22:337.
    2. Crocker, P.R. and A. Varki (2001) Immunology 103:137.
    3. Angata, T. et al. (2002) J. Biol. Chem. 277:24466.
    4. Simmons, D. and B. Seed (1988) J. Immunol. 141:2797.
    5. Freeman, S.D. et al. (1995) Blood 85:2002.
    6. Taylor, V.C. et al. (1999) J. Biol. Chem. 274:11505.
    7. Ulyanova, T. et al. (1999) Eur. J. Immunol. 29:3440.
  • Long Name:
    Sialic Acid Binding Ig-like Lectin 3
  • Entrez Gene IDs:
    945 (Human); 12489 (Mouse)
  • Alternate Names:
    CD33 antigen (gp67); CD33 antigen; CD33 molecule; CD33; FLJ00391; gp67; myeloid cell surface antigen CD33; p67; sialic acid binding Ig-like lectin 3; Sialic acid-binding Ig-like lectin 3; Siglec3; Siglec-3; SIGLEC3gp67
Related Research Areas
Citations:

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citations: Showing 1 - 1

  1. Negative regulation of Toll-like receptor-4 signaling through the binding of glycosylphosphatidylinositol-anchored glycoprotein, CD14, with the sialic acid-binding lectin, CD33.
    Authors: Ishida A, Akita K, Mori Y, Tanida S, Toda M, Inoue M, Nakada H
    J Biol Chem, 2014;289(36):25341-50.
    Species: Human
    Sample Type: Whole Cells
    Application: Neut
Isotype Controls
Description Application Cat# Citations Images  

Mouse IgG1 Isotype Control

Ctrl MAB002 133  
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Mouse IgG1 Isotype Control

Ctrl MAB002R 1
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Secondary Antibodies
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Mouse IgG HRP-conjugated Antibody

WB HAF007 26  
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Donkey Anti-Mouse IgG NorthernLights™ NL557-conjugate Antibody

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Donkey Anti-Mouse IgG Biotinylated Antibody

WB BAF018 1
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Mouse IgG HRP-conjugated Antibody

WB HAF018 7  
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Donkey Anti-Mouse IgG NorthernLights™ NL637-conjugated Antibody

Flow, IHC, ICC NL008 8
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Mouse F(ab)2 IgG (H+L) APC-conjugated Antibody

Flow F0101B 2  
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Donkey Anti-Mouse IgG NorthernLights™ NL493-conjugated Antibody

Flow, IHC, ICC NL009 5
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Mouse IgG Antibody

WB AF007 4
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Goat Anti-Mouse IgG Biotinylated Antibody

WB BAF007 4
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Mouse F(ab)2 IgG (H+L) Fluorescein-conjugated Antibody

Flow F0103B 5  
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Mouse/Rabbit IgG VisUCyte HRP Polymer Antibody

IHC VC002  
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Mouse IgG VisUCyte HRP Polymer Antibody

IHC VC001  
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Goat Anti-Mouse IgG Fc Affinity Purified Polyclonal Ab

G-202-C 2
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Mouse F(ab)2 IgG (H+L) PerCP-conjugated Antibody

Flow F0114  
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Average Rating: 5 (Based on 1 review)

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We have 1 review tested in 1 application: Flow Cytometry.

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Summary

ApplicationFlow Cytometry
Sample TestedTHP-1 human acute monocytic leukemia cell line
SpeciesHuman

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