Human SR-AI/MSR Antibody

(1 citations)   
  • Species Reactivity
    Human
  • Specificity
    Detects human SR‑AI/MSR in direct ELISAs and Western blots. In direct ELISAs and Western blots, no cross-reactivity with recombinant mouse SR-AI is observed.
  • Source
    Monoclonal Mouse IgG2B Clone # 351615
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human SR‑AI/MSR
    Lys77-Leu451
    Accession # P21757
  • 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
    See below
  • Flow Cytometry
    2.5 µg/106 cells
    THP‑1 human acute monocytic leukemia cell line treated with PMA and Ca2+ ionomycin
  • CyTOF-reported
    This clone has been commercially reported for use in CyTOF®. 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.
Data Examples
Detection of Human SR‑AI/MSR by Western Blot. Western blot shows lysates of THP‑1 human acute monocytic leukemia cell line untreated (-) or treated (+) with 80 nM PMA for 72 hours. PVDF membrane was probed with 1 µg/mL of Mouse Anti-Human SR‑AI/MSR Monoclonal Antibody
(Catalog # MAB2708) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF018). A specific band was detected for SR‑AI/MSR at approximately 80 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
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: SR-AI/MSR

The type I class A macrophage scavenger receptor (SR-AI; also MSR-AI) is a 70-80 kDa protein that belongs to the scavenger receptor superfamily (1‑3). Receptors of this family contain characteristic extracellular domains and bind to a series of generally unrelated, but negatively-charged/polyanionic ligands (1, 3). Human SR-AI is a type II transmembrane glycoprotein that is 451 amino acids (aa) in length. It contains a 50 aa cytoplasmic tail, a 26 aa transmembrane segment and a 375 aa extracellular region (4, 5). The extracellular region contains four definitive domains, with a membrane proximal spacer of 33 aa, an alpha -helical coiled-coil domain of 163 aa, a collagen-like domain of 69 aa, and a cysteine-rich C-terminus of 110 aa (4, 6). The cysteine-rich domain (CRD) forms three intrachain disulfide bonds (7). The functional form of the molecule is a 220‑230 kDa membrane-associated trimer that, in human, apparently has two disulfide bonded chains and a third noncovalently associated subunit (8, 9). Human extracellular region is 73% and 72% aa identical to bovine and mouse SR-AI extracellular region, respectively. The human gene for SR-A gives rise to three isoforms; the I isoform of 451 aa, the II isoform of 358 aa, and the III isoform of 388 aa (4, 5, 10). All are identical through the first 344 aa which includes the cytoplasmic tail through the collagenous domain. Isoform II (SR-AII) shows a severe truncation of the CRD, but is expressed on the cell surface. Isoform III (SR-AIII) has a modest truncation of the CRD, and cannot be expressed on the cell surface. However, relative to SR-AI, SR-AII is known to show differential sensitivity to LPS and receptor binding to gram‑negative bacteria (9, 11), while SR-AIII is known to be a dominant-negative isoform (10). SR-AIII may achieve this by either heterotrimerizing with SR-AI, or simply eliminating the production of SR-AI mRNA.

  • References:
    1. Platt, N. and S. Gordon (2001) J. Clin. Invest. 108:649.
    2. Linton, M.F. and S. Fazio (2001) Curr. Opin. Lipidol. 12:489.
    3. Platt, N. and S. Gordon (1998) Chem. Biol. 5:R193.
    4. Matsumoto, A. et al. (1990) Proc. Natl. Acad. Sci. USA 87:9133.
    5. Emi, M. et al. (1993) J. Biol. Chem. 268:2120.
    6. Naito, M. et al. (1992) Am. J. Pathol. 141:591.
    7. Resnick, D. et al. (1996) J. Biol. Chem. 271:26924.
    8. Ashkenas, J. et al. (1993) J. Lipid Res. 34:983.
    9. Penman, M. et al. (1991) J. Biol. Chem. 266:23985.
    10. Gough, P.J. et al. (1998) J. Lipid Res. 39:531.
    11. Peiser, L. et al. (2000) Inf. Immun. 68:1953.
  • Long Name:
    Macrophage Scavenger Receptor Types I and II
  • Entrez Gene IDs:
    4481 (Human); 20288 (Mouse); 25073 (Rat)
  • Alternate Names:
    CD204 antigen; CD204; Macrophage acetylated LDL receptor I and II; macrophage scavenger receptor 1; macrophage scavenger receptor type III; MSR1; phSR1; phSR2; SCARA1; SCARA1macrophage scavenger receptor types I and II; Scavenger receptor class A member 1; scavenger receptor class A, member 1; SR-A; SRAI; SR-AI
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. Leptin modulates ACAT1 expression and cholesterol efflux from human macrophages.
    Authors: Hongo S, Watanabe T, Arita S
    Am. J. Physiol. Endocrinol. Metab., 2009;297(2):E474-82.
    Species: Human
    Sample Type: Cell Lysates
    Application: WB
Isotype Controls
Description Application Cat# Citations Images  

Mouse IgG2B Isotype Control

Ctrl MAB004 32  
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Mouse IgG2B Isotype Control

Ctrl MAB0041 7  
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Mouse IgG2B Isotype Control

Ctrl MAB0042 6
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Secondary Antibodies
Description Application Cat# Citations Images  

Mouse IgG HRP-conjugated Antibody

WB HAF007 26  
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Mouse F(ab)2 IgG (H+L) PE-conjugated Antibody

Flow F0102B 10  
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Donkey Anti-Mouse IgG NorthernLights™ NL557-conjugate Antibody

Flow, IHC, ICC NL007 9
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Donkey Anti-Mouse IgG Biotinylated Antibody

WB BAF018 1
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Mouse IgG HRP-conjugated Antibody

WB HAF018 9  
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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™ NL637-conjugated Antibody

Flow, IHC, ICC NL008 8
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Donkey Anti-Mouse IgG NorthernLights™ NL493-conjugated Antibody

Flow, IHC, ICC NL009 5
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Mouse F(ab)2 IgG (H+L) Fluorescein-conjugated Antibody

Flow F0103B 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/Rabbit IgG VisUCyte HRP Polymer Antibody

IHC VC002  
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Rat Anti-Mouse IgG2B APC-conjugated Antibody

Flow F0133 1  
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Mouse IgG VisUCyte HRP Polymer Antibody

IHC VC001  
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Mouse F(ab)2 IgG (H+L) PerCP-conjugated Antibody

Flow F0114  
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Goat Anti-Mouse IgG Fc Affinity Purified Polyclonal Ab

G-202-C 2
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Rat Anti-Mouse IgG2B Fluorescein-conjugated Antibody

Flow F0134 1
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Rat Anti-Mouse IgG2B PE-conjugated Antibody

Flow F0132  
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Mouse IgG2B Antibody

Flow MAB0043  
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