Recombinant Human TMIGD2/CD28H Fc Chimera Protein, CF

Catalog # Availability Size / Price Qty
8316-TR-050
R&D Systems Recombinant Proteins and Enzymes
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Recombinant Human TMIGD2/CD28H Fc Chimera Protein, CF Summary

Product Specifications

Purity
>95%, by SDS-PAGE with silver 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 Recombinant Human TMIGD2/CD28H Fc Chimera is immobilized at 0.125 μg/mL, 100 μL/well, the concentration of Recombinant Human B7-H7  Fc Chimera (Catalog # 8084-B7) that produces 50% of the optimal binding response is approximately 0.07-0.35 μg/mL.
Source
Human embryonic kidney cell, HEK293-derived human TMIGD2/CD28H protein
Human TMIGD2
(Leu23-Gly150)
Accession # Q96BF3
IEGRMD Human IgG1
(Pro100-Lys330)
N-terminus C-terminus
Accession #
N-terminal Sequence
Analysis
Leu23
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
41 kDa (monomer)
SDS-PAGE
57-63 kDa, reducing conditions

Product Datasheets

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8316-TR

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.

8316-TR

Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 100 μg/mL in sterile 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.
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Background: TMIGD2/CD28H

CD28 homolog (CD28H), also called TMIG2 and IGPR-1, is a 55 kDa glycosylated transmembrane protein that shares approximately 10% amino acid (aa) sequence identity with CD28, CTLA-4, ICOS, and PD-1. CD28H is composed of a single extracellular immunoglobulin variable-like domain (IgV) (aa 23-109), a transmembrane domain (aa 151-171), and a long cytoplasmic domain (aa172-282). CD28H is constitutively expressed on naive T and NK cells. Similar to the interaction of B7 with CD28, the interaction of CD28H with B7-H7 activates the Akt-dependent signaling cascade and promotes the proliferation and activation of newly generated peripheral effector and memory T cells (1, 2). CD28H is additionally expressed in the skin and epithelium lining the lung, airway, mammary gland, and gastrointestinal tract (3). It regulates cellular morphology, focal adhesion contact formation, and cell migration (3, 4). CD28H also participates in angiogenesis in vitro (3). CD28H interacts with multiple cytoskeletal proteins including Actin, Paxillin, SPIN90, CACNB2, and BPAG1. Interactions between the cytoplasmic proline-rich domain of CD28H and SPIN90 modulate the activity of CD28H in both angiogenesis and cell adhesion (3, 5).

References
  1. Zhu, Y. et al. (2013) Nat. Commun. 4:2043.
  2. Parry, R.V. et al. (2003) J.Immunol. 171:166.
  3. Rahimi, N. et al. (2012) Mol. Biol. Cell. 23:1646.
  4. Huang, C. et al. (2003) Nature 424:219.
  5. Kaneko, T. et al. (2008) Front. Biosci. 13:4938.
Long Name
Transmembrane And Immunoglobulin Domain Containing 2
Entrez Gene IDs
126259 (Human)
Alternate Names
CD28H; IGPR1; IGPR-1; MGC23244; TMIGD2; transmembrane and immunoglobulin domain containing 2; transmembrane and immunoglobulin domain-containing protein 2

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