Human DPPIV/CD26 Antibody Summary
Asp34-Pro766
Accession # Q53TN1
Applications
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.
Scientific Data
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DPPIV/CD26 in Human PBMCs. DPPIV/CD26 was detected in immersion fixed human peripheral blood mononuclear cells (PBMCs) (left panel; positive staining) and MCF‑7 human breast cancer cell line (right panel; negative staining) using Rat Anti-Human DPPIV/CD26 Monoclonal Antibody (Catalog # MAB11801) at 8 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Rat IgG Secondary Antibody (red; NL013) and counterstained with DAPI (blue). Specific staining was localized to cytoplasm. Staining was performed using our protocol for Fluorescent ICC Staining of Non-adherent Cells.
Reconstitution Calculator
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.
Background: DPPIV/CD26
DPPIV/CD26 (EC 3.4.14.5) is a serine exopeptidase that releases Xaa-Pro dipeptides from the N-terminus of oligo- and polypeptides (1, 2). It is a type II membrane protein consisting of a short cytoplasmic tail, a transmembrane domain, and a long extracellular domain (3‑5). The extracellular domain contains glycosylation sites, a cysteine-rich region and the catalytic active site (Ser, Asp and His charge relay system). The amino acid sequence of the mouse DPPIV/CD26 extracellular domain is 84% and 91% identical to the human and rat counterparts, respectively. In the native state, DPPIV/CD26 is present as a noncovalently linked homodimer on the cell surface of a variety of cell types. The soluble form is also detectable in human serum and other body fluids, the levels of which may have clinical significance in patients with cancer, liver and kidney diseases, and depression. DPPIV/CD26 plays an important role in many biological and pathological processes. It functions as T cell-activating molecule (THAM). It serves as a cofactor for entry of HIV in CD4+ cells (6). It binds adenosine deaminase, the deficiency of which causes severe combined immunodeficiency disease in humans (7). It cleaves chemokines such as stromal-cell-derived factor 1 alpha and macrophage-derived chemokine (8, 9). It degrades peptide hormones such as glucagon (10). It truncates procalcitonin, a marker for systemic bacterial infections with elevated levels detected in patients with thermal injury, sepsis and severe infection, and in children with bacterial meningitis (11).
- Misumi and Ikehara (1998) in Handbook of Proteolytic Enzymes. Barrett, et al. (eds) San Diego: Academic Press, p. 378.
- Ikehara, et al. (1994) Methods Enzymol. 244:215.
- Marguet, et al. (1992) J. Biol. Chem. 267:2200.
- Bernard, et al. (1994) Biochemistry 33:15204.
- Viver, et al. (1991) J. Immunol. 147:447.
- Callebaut, et al. (1993) Science 262:2045.
- Kameoka, et al. (1993) Science 261:466.
- Ohtsuki, et al. (1998) FEBS Lett. 431:236.
- Proost, et al. (1999) J. Biol. Chem. 274:3988.
- Hinke, et al. (2000) J. Biol. Chem. 275:3827.
- Wrenger, et al. (2000) FEBS Lett. 466:155.
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