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Recombinant Human Mer His-tag Avi-tag Protein, CF

Catalog #: AVI10515 Datasheet
Biotinylated
Catalog # Availability Size / Price Qty
AVI10515-050
Recombinant Human Mer His-tag 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 His-tag Avi-tag Protein, CF Summary

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 His-tag Avi-tag (Catalog# AVI10515) is captured on EvenCoat Streptavidin Coated Plates  (Catalog # CP004) at 2.00 µg/mL (100 µL/well). Recombinant Human Gas6 Protein (Catalog # 885-GSB) binds with an ED50 of 80.0‑800 ng/mL.
Source
Human embryonic kidney cell, HEK293-derived human Mer protein
Human Mer
(Arg20-Asp500)
Accession # Q12866.2		6-His tagAvi-tag
N-terminusC-terminus
Accession #
Q12866.2
N-terminal Sequence
Analysis
Arg20
Structure / Form
Biotinylated via Avi-tag
Predicted Molecular Mass
55 kDa
SDS-PAGE
108-121 kDa, under reducing conditions.

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AVI10515

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.

AVI10515

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

Measured by its binding ability in a functional ELISA. When Biotinylated Recombinant Human Mer His-tag Avi-tag Protein (Catalog # AVI10515) is captured on EvenCoat Streptavidin Coated Plates (CP004) at 2.00 µg/mL (100 µL/well), Recombinant Human Gas6 Protein (885-GSB) binds with an ED50 of 80.0-800 ng/mL.

SDS-PAGE View Larger

2 μg/lane of Recombinant Human Mer His-tag Avi-tag Protein (Catalog # AVI10515) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 108-121 kDa.

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 His-tag 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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