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Recombinant Human Mer Fc Chimera Avi-tag Protein, CF

Catalog #: AVI891 Datasheet
Biotinylated
Catalog # Availability Size / Price Qty
AVI891-050
Biotinylated Recombinant Human Mer Fc Chimera Avi-tag Protein Binding Activity.
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Summary Product Datasheets Carrier Free Data Images Reconstitution Calculator Background Related Research Areas

Recombinant Human Mer Fc Chimera Avi-tag Protein, CF Summary

Learn more about Avi-tag Biotinylated Proteins

Product Specifications

Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its binding ability in a functional ELISA. When Biotinylated Recombinant Human Mer Fc Chimera Avi-tag protein is immobilized onto a Streptavidin Coated Plate (Catalog # CP004), Recombinant Human GAS6  (Catalog # 885-GSB) bindis with an ED50 of 0.300-1.80 μg/mL. The biotin to protein ratio is greater than 0.7 as determined by the HABA assay.
Source
Chinese Hamster Ovary cell line, CHO-derived human Mer protein
Human Mer
(Arg26-Ala499)
Accession # AAB60430.1		IEGRMDHuman IgG1
(Pro100-Lys330)		Avi-tag
N-terminusC-terminus
Accession #
AAB60430.1
N-terminal Sequence
Analysis
Arg26
Structure / Form
Disulfide-linked homodimer
Biotinylated via Avi-tag
Predicted Molecular Mass
78 kDa (monomer)
SDS-PAGE
113 - 133 kDa, under reducing conditions.

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AVI891

Product Datasheet

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

AVI891

Formulation Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution Reconstitute at 500 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Scientific Data

Binding Activity View Larger

When Biotinylated Recombinant Human Mer Fc Chimera Avi-tag Protein (Catalog # AVI891) is immobilized onto a Streptavidin Coated Plate (CP004), Recombinant Human Gas6 (885-GSB) bindis with an ED50 of 0.300-1.80 ug/mL.

SDS-PAGE View Larger

2 μg/lane of Biotinylated Recombinant Human Mer Fc Chimera Avi-tag Protein (Catalog # AVI891) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 113-133 kDa and 226-266 kDa, respectively.

Background: Mer

Tyrosine-protein Kinase Mer, also known as c-Mer and MerTK, is a member of the receptor tyrosine kinase subfamily TAM (Tyro3, Axl, and Mer). Mature human Mer consists of 485 aa extracellular domain, 21 aa transmembrane domain, and 473 aa cytoplasmic domain. Within the extracellular domain, human Mer shares 77.2% and 76.6% homology with mouse and rat Mer, respectively. Similar to Axl and Tyro3, the extracelluar domain of Mer contains two Ig-like motifs and two fibronectin type III motifs. Mer is not expressed in normal B- and T-cells but expressed in neoplastic B- and T-cell lines (1-2).  It is also show higher expression in immunosuppressive M2‑like macrophages (3).  Mer is known to bind Gas6, Protein S, Tubby, Tubby-like protein 1 (Tulp1), and Galectin-3 (4-7). Upon binding ligands via the Ig-like motif, Mer is dimerized to trans-autophosphorylate the kinase domain to induce downstream signaling. It has been shown that Mer signaling in macrophages induces M2 polarization, which promote tumor growth, metastasis and evasion of anti-tumor immunity in tumor microenviroment (8). Inhibition of Mer, especially on leukocytes and macrophages, is an effective anti-cancer therapy (9). Our Avi-tag Biotinylated Mer Fc Chimera features biotinylation at a single site contained within the Avi-tag, a unique 15 amino acid peptide. Protein orientation will be uniform when bound to streptavidin-coated surface due to the precise control of biotinylation and the rest of the protein is unchanged so there is no interference in the protein's bioactivity.

References
  1. Graham, D.K. et al. (1994) Cell Growth Differ. 5:647.
  2. Graham, D.K. et al. (2006) Clin. Cancer Res. 12:2662.
  3. Shibata, T. et al. (2014) J. Immunol. 192:3569.
  4. Nagata, K. et al. (1996) J. Biol. Chem. 271:30022.
  5. Uehara, H. et al. (2008) J. Immunol. 180:2522.
  6. Caberoy, N.B. et al. (2010) EMBO J. 29:3898.
  7. Caberoy, N.B. et al. (2012) J. Cell Physiol. 227:401.
  8. Kim, S.Y. et al. (2016) Sci. Rep. 6:29673.
  9. Cummings, C.T. et al. (2013) Clin. Cancer Res. 19:5275.
Long Name
Receptor Tyrosine Protein Kinase Mer
Entrez Gene IDs
10461 (Human); 17289 (Mouse); 102143798 (Cynomolgus Monkey)
Alternate Names
c-Eyk; c-mer proto-oncogene tyrosine kinase; C-mer; EC 2.7.10; EC 2.7.10.1; MER receptor tyrosine kinase; Mer; MerTK; MGC133349; Receptor tyrosine kinase MerTK; RP38Proto-oncogene c-Mer; STK kinase; tyrosine-protein kinase Mer

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