Human TMIGD2/CD28H Antibody Summary
Accession # Q96BF3
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.
Detection ofTMIGD2/CD28H in HEK293 Human Cell Line Transfected with HumanTMIGD2/CD28H and eGFP by Flow Cytometry. HEK293 human embryonic kidney cell line transfected with human TMIGD2/CD28H and eGFP was stained with and either (A) Mouse Anti-Human TMIGD2/CD28H Monoclonal Antibody (Catalog # MAB83162) or (B) Mouse IgG2A Isotype Control (Catalog # MAB003) followed by Allophycocyanin-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # F0101B). View our protocol for Staining Membrane-associated Proteins.
B7-H7binding to TMIGD2/CD28H-transfected HEK293 Human Cell Line is Blocked byHuman TMIGD2/CD28H Antibody.
In a functional flow cytometry test,Recombinant Human
B7-H7 Fc Chimera (Catalog #156-B7,
500 ng/mL) binds to HEK293 human embryonic kidney cell linetransfected with recombinant human TMIGD2/CD28H (black dotted line). Binding iscompletely blocked (orange histogram) by 50 μg/mL of Mouse Anti-Human TMIGD2/CD28HMonoclonal Antibody (Catalog # MAB83162). Mouse IgG2B Isotype Control(Catalog #MAB003)at 50 μg/mL was used as a control (blue line). Cells were stained with MouseAnti-Human IgG1 Fc APC‑conjugated Monoclonal Antibody (Catalog #FAB110A).
Preparation and Storage
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 6 months, -20 to -70 °C under sterile conditions after reconstitution.
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).
- Zhu, Y. et al. (2013) Nat. Commun. 4:2043.
- Parry, R.V. et al. (2003) J.Immunol. 171:166.
- Rahimi, N. et al. (2012) Mol. Biol. Cell. 23:1646.
- Huang, C. et al. (2003) Nature 424:219.
- Kaneko, T. et al. (2008) Front. Biosci. 13:4938.
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