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Human SR-AI/MSR Antibody

Catalog #: AF2708
2 Citations Datasheet / COA / SDS
Catalog # Availability Size / Price Qty
AF2708
AF2708-SP
Detection of Human SR‑AI/MSR by Western Blot.
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Citations (2)
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Human SR-AI/MSR Antibody Summary

Species Reactivity
Human
Specificity
Detects human SR-AI/MSR in direct ELISAs and Western blots. In direct ELISAs, approximately 25% cross-reactivity with recombinant mouse SR-AI is observed.
Source
Polyclonal Goat IgG
Formulation
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. See Certificate of Analysis for details.
*Small pack size (-SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
Label
Unconjugated

Applications

Recommended Concentration
Sample
Western Blot
0.2 µg/mL
See below
Immunohistochemistry
1-15 µg/mL
See below
Blockade of Receptor-ligand Interaction
In a functional ELISA, 0.5-2 µg/mL of this antibody will block 50% of the binding of 400 ng/mL of biotinylated AGE-BSA to immobilized Recombinant Human SR-AI/MSR (Catalog # 2708-MS) coated at 5 µg/mL (100 µL/well). At 20 μg/mL, this antibody will block >90% of the binding.
 
Immunocytochemistry
1-15 µg/mL
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.

Scientific Data

Western Blot Detection of Human SR-AI/MSR antibody by Western Blot. View Larger

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 PMA. PVDF membrane was probed with 0.2 µg/mL of Goat Anti-Human SR-AI/MSR Antigen Affinity-purified Polyclonal Antibody (Catalog # AF2708) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF017). 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.

Immunocytochemistry SR-AI/MSR antibody in THP-1 Human Cell Line by Immunocytochemistry (ICC). View Larger

SR‑AI/MSR in THP-1 Human Cell Line. SR-AI/MSR was detected in immersion fixed THP-1 human acute monocytic leukemia cell line untreated (right panel) and treated with PMA (left panel) using Goat Anti-Human SR-AI/MSR Antigen Affinity-purified Polyclonal Antibody (Catalog # AF2708) at 1.7 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Goat IgG Secondary Antibody (red; Catalog # NL001) and counterstained with DAPI (blue). Specific staining was localized to cytoplasm. View our protocol for Fluorescent ICC Staining of Non-adherent Cells.

Immunohistochemistry SR-AI/MSR antibody in Human Lung Tissue by Immunohistochemistry (IHC-P). View Larger

SR-AI/MSR in Human Lung Tissue. SR-AI/MSR was detected in immersion fixed paraffin-embedded sections of human lung tissue using Goat Anti-Human SR-AI/MSR Antigen Affinity-purified Polyclonal Antibody (Catalog # AF2708) at 1 µg/mL for 1 hour at room temperature followed by incubation with the Anti-Goat IgG VisUCyte™ HRP Polymer Antibody (Catalog # VC004). Tissue was stained using DAB (brown) and counterstained with hematoxylin (blue). Specific staining was localized to macrophages. View our protocol for IHC Staining with VisUCyte HRP Polymer Detection Reagents.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Preparation and Storage

Reconstitution
Reconstitute at 0.2 mg/mL in sterile PBS. For liquid material, refer to CoA for concentration.
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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
Store the unopened product at -20 to -70 °C. Use a manual defrost freezer and avoid repeated freeze-thaw cycles. Do not use past expiration date.

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 an ever expanding family of transmembrane molecules collectively referred to as scavenger receptors (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 equal 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. Their functions are unknown. 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

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Citations for Human SR-AI/MSR Antibody

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.

2 Citations: Showing 1 - 2
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  1. Pattern Recognition Scavenger Receptor CD204 Attenuates Toll-like Receptor 4-induced NF-kappaB Activation by Directly Inhibiting Ubiquitination of Tumor Necrosis Factor (TNF) Receptor-associated Factor 6.
    Authors: Yu X, Yi H, Guo C, Zuo D, Wang Y, Kim HL, Subjeck JR, Wang XY
    J. Biol. Chem., 2011-04-01;286(21):18795-806.
    Species: Human
    Sample Types: Cell Lysates
    Applications: Immunoprecipitation, Western Blot
  2. Preventive effects of heregulin-beta1 on macrophage foam cell formation and atherosclerosis.
    Authors: Xu G, Watanabe T, Iso Y, Koba S, Sakai T, Nagashima M, Arita S, Hongo S, Ota H, Kobayashi Y, Miyazaki A, Hirano T
    Circ. Res., 2009-07-30;105(5):500-10.
    Species: Human
    Sample Types: Cell Lysates
    Applications: Western Blot

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