Recombinant Human CD26 Protein

Collections: Antibody / cell therapy targets, Antibody therapeutic / adc target proteins, Cluster of differentiation (cd) proteins, Featured cd protein molecules, Recombinant proteins

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Product Overview

Host Species	Human
Accession	P27487
Synonym	CD26 antigen ADA-binding protein ADABP ADCP 2 ADCP-2 ADCP2 Adenosine deaminase complexing protein 2 CD 26 CD26 CD26 antigen 3 Dipeptidyl peptidase 4 Dipeptidyl peptidase 4 soluble form Dipeptidyl peptidase IV Dipeptidyl peptidase IV membrane form Dipeptidyl peptidase IV soluble form Dipeptidyl peptidase, intestinal Dipeptidylpeptidase 4 Dipeptidylpeptidase IV Dipeptidylpeptidase IV (CD26, adenosine deaminase complexing protein 2) DPP 4 DPP IV DPP IV estoenzyme DPP4 DPP4_HUMAN DPPIV Intestinal dipeptidyl peptidase T cell activation antigen CD26 T-cell activation antigen CD26 TP 103 TP103
Description	Recombinant Human CD26 Protein was expressed in Baculovirus infected BTI-TN-5B1-4 cells. It is a Full length protein
Source	Baculovirus infected BTI-TN-5B1-4 cells
AA Sequence	SRKTYTLTDYLK NTYRLKLYSL RWISDHEYLY KQENNILVFN AEYGNSSVFL ENSTFDEFGH SINDYSISPD GQFILLEYNY VKQWRHSYTA SYDIYDLNKR QLITEERIPN NTQWVTWSPV GHKLAYVWNN DIYVKIEPNL PSYRITWTGK EDIIYNGITD WVYEEEVFSA YSALWWSPNG TFLAYAQFND TEVPLIEYSF YSDESLQYPK TVRVPYPKAG AVNPTVKFFV VNTDSLSSVT NATSIQITAP ASMLIGDHYL CDVTWATQER ISLQWLRRIQ NYSVMDICDY DESSGRWNCL VARQHIEMST TGWVGRFRPS EPHFTLDGNS FYKIISNEEG YRHICYFQID KKDCTFITKG TWEVIGIEAL TSDYLYYISN EYKGMPGGRN LYKIQLSDYT KVTCLSCELN PERCQYYSVS FSKEAKYYQL RCSGPGLPLY TLHSSVNDKG LRVLEDNSAL DKMLQNVQMP SKKLDFIILN ETKFWYQMIL PPHFDKSKKY PLLLDVYAGP CSQKADTVFR LNWATYLAST ENIIVASFDG RGSGYQGDKI MHAINRRLGT FEVEDQIEAA RQFSKMGFVD NKRIAIWGWS YGGYVTSMVL GSGSGVFKCG IAVAPVSRWE YYDSVYTERY MGLPTPEDNL DHYRNSTVMS RAENFKQVEY LLIHGTADDN VHFQQSAQIS KALVDVGVDF QAMWYTDEDH GIASSTAHQH IYTHMSHFIK QCFSLP SGRLVPRGSHHHHHH
Purity	>95% purity as determined by SDS-PAGE
Endotoxin	< 1.0 EU per μg of the protein as determined by the LAL method
Bioactivity	Biological activity: > 20 unit/mg. One unit will hydrolyze 1 µmole of p-nitroaniline per minute at pH8.0 at 37C using 1mM of Gly-Pro p-nitroanilde as a substrate.
Formulation	Liquid Solution
Stability	The recombinant protein samples are stable for up to 12 months at -80°C
Reconstitution	See related COA
Unit Definition	For Research Use Only
Storage Buffer	Shipped at 4°C. Upon delivery aliquot. Store at -80°C. Avoid freeze / thaw cycle.

Target Details

Target Function	Cell surface glycoprotein receptor involved in the costimulatory signal essential for T-cell receptor (TCR)-mediated T-cell activation. Acts as a positive regulator of T-cell coactivation, by binding at least ADA, CAV1, IGF2R, and PTPRC. Its binding to CAV1 and CARD11 induces T-cell proliferation and NF-kappa-B activation in a T-cell receptor/CD3-dependent manner. Its interaction with ADA also regulates lymphocyte-epithelial cell adhesion. In association with FAP is involved in the pericellular proteolysis of the extracellular matrix (ECM), the migration and invasion of endothelial cells into the ECM. May be involved in the promotion of lymphatic endothelial cells adhesion, migration and tube formation. When overexpressed, enhanced cell proliferation, a process inhibited by GPC3. Acts also as a serine exopeptidase with a dipeptidyl peptidase activity that regulates various physiological processes by cleaving peptides in the circulation, including many chemokines, mitogenic growth factors, neuropeptides and peptide hormones such as brain natriuretic peptide 32. Removes N-terminal dipeptides sequentially from polypeptides having unsubstituted N-termini provided that the penultimate residue is proline.; (Microbial infection) Acts as a receptor for human coronavirus MERS-CoV-2.
Subcellular Location	[Dipeptidyl peptidase 4 soluble form]: Secreted.; Cell membrane; Single-pass type II membrane protein. Apical cell membrane; Single-pass type II membrane protein. Cell projection, invadopodium membrane; Single-pass type II membrane protein. Cell projection, lamellipodium membrane; Single-pass type II membrane protein. Cell junction. Membrane raft.
Protein Families	Peptidase S9B family, DPPIV subfamily
Database References	HGNC: 3009 OMIM: 102720 KEGG: hsa:1803 STRING: 9606.ENSP00000353731 UniGene: Hs.368912
Tissue Specificity	Expressed specifically in lymphatic vessels but not in blood vessels in the skin, small intestine, esophagus, ovary, breast and prostate glands. Not detected in lymphatic vessels in the lung, kidney, uterus, liver and stomach (at protein level). Expressed

Gene Functions References

Our results showed 14% inferior plasma DPP-4 activity in adolescent idiopathic scoliosis (AIS) patients when compared to healthy controls . Similarly, osteoblasts derived from AIS subjects had lower DPP-4 gene and protein expression than controls by 90.5% and 57.1% respectively (P < 0.009). DPP-4 expression was regulated in a different manner in osteoblasts isolated from AIS participants compared to controls. PMID: 28600546
Here we review the recent advances in identifying the cellular sources of both circulating and membrane-bound DPP4 important for cleavage of the incretin hormones and regulation of glucose and lipoprotein metabolism. PMID: 29412815
DPP4 activity when compared to healthy controls. Analysis of Dpp4-Liv-Tg mice revealed elevated systemic DPP4 activity and diminished active GLP-1 levels. PMID: 29031724
DPP4 was not different in this group of polycystic ovarian syndrome patients. However, a relationship between DPP4 and markers of insulin resistance were found. PMID: 29680519
The analysis of their molecular properties allowed the design of a multiple linear regression model for activity prediction. Their docking analysis allowed visualization of the interactions between the pharmacophore regions and hDDP-IV. PMID: 28027711
The level of myocardial CD26 expression might be a predictive marker of prognosis in patients with heart failure. PMID: 30369565
Our study showed that complement was excessively activated in MERS-CoV-infected hDPP4-Tg mice through observations of increased concentrations of the C5a and C5b-9 complement activation products in sera and lung tissues, respectively. PMID: 29691378
API was demonstrated to inhibit the migration/invasion of NSCLC cells harboring different EGFR statuses via suppressing the Snail/Slug-mediated EMT..CD26 may be a useful biomarker for predicting NSCLC progression. API effectively suppressed lung cancer progression by targeting the CD26-Akt-Snail/Slug signaling pathway PMID: 30134935
hepatocyte DPP4 promotes visceral adipose tissue inflammation and insulin resistance in obesity, and targeting this pathway may have metabolic benefits that are distinct from those observed with oral DPP4 inhibitors PMID: 29562231
this study shows that CD26 expression is down-regulated on CD8(+) T cells in patients with Hashimoto's thyroiditis PMID: 29175506
Several isoforms of DPP-IV and FAP are present in glioblastoma tissue. The absence of alkaline isoforms of both enzymes in glioma cell lines however suggests that isoforms from other, most likely stromal, cell types contribute to the overall pattern seen in glioblastoma tissues. PMID: 28452380
Data suggest that dipeptidyl peptidase 4 (DPPIV) gene polymorphism influences disease susceptibility and acute pancreatitis (AP) severity. PMID: 28902797
High levels of DPP4a are independently associated with an increased rate of no-reflow events. PMID: 28000723
DPP-4 activity and GLP-1total levels were higher in patients with microvascular complications associated with T2DM. Contrary to expectations, no negative correlation was seen between GLP-1 and DDP-4 levels. This result suggests the possible inefficacy of DDP-4 activity as a marker to predict in vivo degradation of endogenous GLP-1. PMID: 29061224
The study showed that DPP-4 inhibitor use does not modify the risk of bone fracture compared with placebo or other anti-diabetic medications in patients with type 2 diabetes. PMID: 27384445
A close connection between SerpinB3 and DPPPIV has been identified, but further studies are required to better understand the mechanism by which these proteins communicate and exert metabolic effects in hepatocellular carcinoma. PMID: 29524519
There is a U-shaped association of serum DPP-IV with mortality in chronic heart failure patients. PMID: 28318663
Levels of DPPIV enzyme activity in sera of patients with psoriatic pruritus were significantly increased compared to those of healthy controls. PMID: 28365081
These findings implicate that DPP4 plays a role in the aggressiveness of UCs, and can serve as a novel prognostic marker and therapeutic target. PMID: 27936466
Data suggest that up-regulation of serum DPP4 activity is associated with severity of diabetic nephropathy/renal insufficiency/albuminuria in subjects with type 1 diabetes. PMID: 27625045
DPPIV overexpression altered cell morphology and stimulated cell proliferation, invasion and tumorigenesis in endometrial carcinoma cells. PMID: 28060721
MERS-CoV S protein binds to DPP4 to suppress macrophage activation via induction of IRAK-M, PPARgamma and the immunosuppressive cytokine IL-10. PMID: 28118607
DPP4a may be associated with future major adverse cardiac or cerebrovascular events in diabetic STEMI patients. PMID: 28587613
DPP4 inhibitors have been demonstrated to be beneficial in the improvement of endothelial homeostasis. PMID: 28440488
As for 18Lin(-), CD34(-) HSCs are characterized by low expression of the tetraspanin CD9, which promotes homing, and high expression of the peptidase CD26, which inhibits homing. PMID: 28687990
suggests that DPP4 T-molecules have modified binding and functions compared with their FL counterparts and may serve regulatory roles in normal and malignant hematopoiesis PMID: 28344320
Analysis of both the structures and inhibitory activities suggests that the binding of the trifluorophenyl moiety in the S1 pocket and the piperazine-2-one moiety have hydrophobic interactions with Phe357 in the S2 extensive subsite, and that the multiple hydrogen bonds made by the (R)-beta-amine group in the S2 pocket and the contacts made by the (R)-tert-butyl group with Arg125 contribute to the high potency observed... PMID: 29061303
the selective expression of DPP4 on the surface of senescent cells enables their preferential elimination. PMID: 28877934
Study shows that increased DPP4 activities are independently associated with mild cognitive impairment in elderly patients with type 2 diabetes. PMID: 27371673
A common variant, i.e., single nucleotide polymorphism rs6741949, in the DPP4 gene interacts with body adiposity and negatively affects glucose-stimulated GLP-1 levels, insulin secretion, and glucose tolerance. PMID: 28750074
CUX-1 overexpression enhanced TNF- production on sCD26/LPS stimulation, while CUX-1 depletion had no effect. Neither CUX-1 overexpression nor CUX-1 depletion had an effect on IL-6 stimulation. These results are discussed in the context of a model that describes the mechanisms by which stimulation of monocytic cells by sCD26 and LPS leads to elevation of TNF- and IL-6 expression. PMID: 23805228
Increased plasma DPP-4 activity may correlate with aneurysmal development. CD26 on monocytes plays a critical role in cell differentiation, possibly mediated by extracellular signal-regulated protein kinase 1/2-p21 axis signaling pathways and cytoskeletal proteins reassembly. PMID: 27887857
Plasma DPP4 activity is significantly associated with NAFLD. The underlying mechanisms may be partly attributed to the interactions between insulin resistance, oxidative stress, inflammation, and DPP4. PMID: 28637594
CD26+ fibroblasts possess proliferation advantage in comparison to CD26- fibroblasts, and the advantage caused expansion of CD26 positive fibroblast population promotes keloid progression. PMID: 28454879
MFSD2B, CCL20 and STAT1, or STARD7 and ZNF512 genes may be risk or protect factors in prognosis of ADC; HTR2B, DPP4, and TGFBRAP1 genes may be risk factors in prognosis of SQC. PMID: 27301951
Increased DPP4 expression is associated with cellular invasion and more aggressive disease in papillary thyroid cancer. DPP4 silencing or treatment with DPP4 inhibitors significantly suppressed colony formation, cell migration, and invasion. PMID: 28575350
Cultured human skin fibroblasts displayed significantly higher levels of CD26 than gingival fibroblasts. This was associated with an increased expression of profibrotic genes and transforming growth factor-beta signaling in skin fibroblasts. PMID: 28641076
Suggest DPP-4 inhibition has a neutral effect on cardiovascular risk in type 2 diabetics without a history of heart failure or renal insufficiency. PMID: 28145158
To clarify whether DPP4 alters its general or partial structure according to the inhibitor used and whether DPP4 has a common rule for inhibitor binding, this study comprehensively analyzed X-ray cocrystal structures of DPP-4 and its inhibitor. All the main and side chains in the inhibitor binding area were minimally altered, except for a few side chains, despite binding to inhibitors of various shapes. PMID: 27491540
DPP-4-dependent insulin like growth factor-1 inhibition in valvular interstitial cells contributes to aortic calcification. PMID: 28179397
Data suggest that, in obesity, serum levels of active GLP1 are down-regulated and serum levels of soluble DPP4 are up-regulated; DPP4 levels correlate negatively with active GLP-1 levels but are positively associated with insulin resistance; thus, DPP4 may be biomarker for insulin resistance. This study was conducted in Malaysia. (GLP1 = glucagon-like peptide 1; DPP4 = dipeptidyl peptidase 4) PMID: 28288852
YS110 is a humanised IgG1 monoclonal antibody with high affinity to the CD26 antigen. YS110 demonstrated preclinical anti-tumour effects without significant side effects PMID: 28291776
Gain of CD26 expression on the malignant T-cells in relapsed erythrodermic leukemic mycosis fungoides PMID: 28083948
like AprA, DPPIV is a chemorepellent for, and inhibits the proliferation of, D. discoideum cells, and that AprA binds some DPPIV binding partners such as fibronectin. PMID: 28028841
CD26 expression should be incorporated in B-CLL patients risk assessment along with well known prognostic factors, since it seems to have a relationship with the tumor mass and influences TTT. PMID: 27376546
Serum CD26 concentration might be an independent prognostic indicator in patients with esophageal squamous cell carcinoma . It might be also useful to detect recurrent tumor in postoperative patients. PMID: 27664490
The trimeric form receptor-binding domain of MERS-CoV spike protein protected hDPP4 transgenic mice from lethal MERS-CoV challenge. PMID: 27750111
Data suggest that dipeptidyl-peptidase 4 [DPP-4) induces a selective pathway of insulin resistance with reduced glycogen storage, enhanced glucose output and increased lipid accumulation in the liver. PMID: 28213130
Analysis of human liver biopsy specimens revealed a correlation of DPP4 expression and DNA methylation to stages of hepatosteatosis and nonalcoholic steatohepatitis. PMID: 27999105
The study suggests that a genetic interaction between DPP4 and CCR6 is involved in RA susceptibility PMID: 27587881

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

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