Human CLEC9a Alexa Fluor® 488-conjugated Antibody

Clone 683409 was used by HLDA to establish CD designation.
  • Species Reactivity
  • Specificity
    Detects human CLEC9a in direct ELISAs. In direct ELISAs, no cross-reactivity with recombinant human (rh) CLEC1, 2, 2A, 3B, 10A, 12B, 14A, rhCD302/CLEC13a, rhMICL, or recombinant mouse CLEC9a is observed.
  • Source
    Monoclonal Mouse IgG1 Clone # 683409
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human CLEC9a
    Accession # Q6UXN8
  • Formulation
    Supplied in a saline solution containing BSA and Sodium Azide.
  • Label
    Alexa Fluor 488
  • Flow Cytometry
    5 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 CLEC9a in Human Peripheral Blood Cells by Flow Cytometry. Human peripheral blood cells gated on CD3-CD141+ cells were stained with Mouse Anti-Human HLA‑DR PerCP‑conjugated Monoclonal Antibody (Catalog # FAB4869C) and either (A) Mouse Anti-Human CLEC9a Alexa Fluor® 488‑conjugated Monoclonal Antibody (Catalog # FAB6049G) or (B) Mouse IgG1 Alexa Fluor 488 Isotype Control (Catalog # IC002G). 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: CLEC9a

CLEC9a (C-type lectin domain family 9 member A), also known as DNGR-1, is a type II transmembrane glycoprotein member of the C‑type lectin superfamily (1, 2). Mature human CLEC9a consists of a 35 amino acid (aa) cytoplasmic domain with an ITAM-like motif, a 21 aa transmembrane segment, and a 185 extracellular domain (ECD) that contains a stalk region and one C-type lectin domain (CTLD) (3‑5). Within the ECD, human CLEC9a shares 57% aa sequence identity with mouse and rat CLEC9a. Although the CTLD of CLEC9a structurally resembles that of other C-type lectins, it lacks the conserved residues that typically mediate calcium and carbohydrate binding. CLEC9a is expressed as a disulfide-linked homodimer of approximately 50 kDa N-glycosylated subunits (3, 5). Human CLEC9a expression is restricted to a subpopulation of BDCA-3+ conventional dendritic cells (cDC) and CD16- monocytes (3‑5). BDCA-3+ cDC are analagous to mouse CD8+ cDC which are specialized in antigenic cross-presentation in complex with MHC class I molecules (6). In mouse, CLEC9a is additionally expressed on plasmacytoid dendritic cells (4, 5). CLEC9a ligation enhances antigen uptake and processing, leading to presentation on MHC class I and cytotoxic T cell (CTL) priming (3‑5). In mouse, CLEC9a recognizes normally intracellular determinant(s) of necrotic cells and mediates their uptake by the dendritic cell (7). The subsequent antigenic cross-presentation to CTL is important for clearing necrotic cellular debris (7). CLEC9a signaling triggers activation of the tyrosine kinase Syk (3, 7).

  • References:
    1. Huysamen, C. and G.D. Brown (2009) FEMS Microbiol. Lett. 290:121.
    2. Geijtenbeek, T.B.H. et al. (2004) Annu. Rev. Immunol. 22:33.
    3. Huysamen, C. et al. (2008) J. Biol. Chem. 283:16693.
    4. Caminschi, I. et al. (2008) Blood 112:3264.
    5. Sancho, D. et al. (2008) J. Clin. Invest. 118:2098.
    6. Dudziak, D. et al. (2007) Science 315:107.
    7. Sancho, D. et al. (2009) Nature 458:899.
  • Long Name:
    C-type Lectin-like Receptor 9
  • Entrez Gene IDs:
    283420 (Human); 232414 (Mouse)
  • Alternate Names:
    CD370; C-type lectin domain family 9 member A; C-type lectin domain family 9, member A; DNGR1; HEEE9341; UNQ9341
Related Research Areas
Isotype Controls
Description Application Cat# Citations Images  

Mouse IgG1 Alexa Fluor® 488-conjugated Antibody

Ctrl IC002G 2  
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Staining Reagents
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Flow Cytometry Staining Buffer (1X)

Flow FC001 3
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Flow Cytometry Mouse Lyse Buffer (10X)

Flow FC003 1
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Flow Cytometry Human Lyse Buffer (10X)

Flow FC002 1
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