شرح
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. CD28H is additionally expressed in the skin and epithelium lining the lung, airway, mammary gland, and gastrointestinal tract. It regulates cellular morphology, focal adhesion contact formation, and cell migration. CD28H also participates in angiogenesis in vitro. 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.
Specifications
|
Synonyms |
TMIGD2; IGPR1; IGPR-1; CD28H; TPC1 |
|
Uniprot No. |
Q96BF3.1 |
|
Source |
Recombinant CD28H/IGPR-1 Protein is expressed from HEK293 Cells with His tag at the C-terminal. It contains Leu23-Gly150. |
|
Molecular Weight |
Approximately 15.1 kDa. Due to glycosylation, the protein migrates to 42-52 kDa based on Tris-Bis PAGE result. |
|
Purity |
> 95% as determined by SDS-PAGE and HPLC. |
|
Activity |
ELISA Data: Immobilized Human CD28H, His Tag at 2μg/ml (100μl/well) on the plate. Dose response curve for Human B7-H7, hFc Tag with the EC50 of 0.06μg/ml determined by ELISA. |
|
Endotoxin |
< 1.0 EU per 1μg of the protein by the LAL method. |
|
Formulation |
Lyophilized from 0.22 μm filtered solution in PBS (pH 7.4). Normally 5% trehalose is added as protectant before lyophilization. |
|
Reconstitution |
Centrifuge tubes before opening. Reconstituting to a concentration more than 100 μg/mL is recommended (usually we use 1 mg/mL solution for lyophilization). Dissolve the lyophilized protein in distilled water. |
Storage
Transported with ice packs. Store at -20℃ to -80℃, valid for one year.
After reconstitution, store unopened at -20 to -80°C for 3 to 6 months. After reconstitution, store at 2 to 8°C for 2 to 7 days.
It is recommended to store in aliquots and freeze for the first use to avoid repeated freezing and thawing.
Note
1. Avoid repeated freezing and thawing.
2. For your safety and health, please wear lab coat and disposable gloves when operating.
3. This product is for scientific research purposes only.
Product Data
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