Pubmed abstracts for Protein-Protein Interaction search result :


Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.82811443
Human CD 26 , a Type 2 membrane glycoprotein with intrinsic dipeptidylpeptidase 4 ( DPPIV ) activity and ability to bind adenosine deaminase type 1 ( ADA 1 ) , is expressed on epithelial cells constitutively , but on T lymphocytes its expression is regulated . 0.82811443^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :1.201791
CD 26 , a T cell activation Ag , also known as dipeptidyl peptidase 4 , is directly associated with adenosine deaminase ( ADA ) on the surface of T cells and T cell lines . 1.201791^^^ CD 26 , a T cell activation Ag , also known as dipeptidyl peptidase 4 , is directly associated with adenosine deaminase ( ADA ) on the surface of T cells and T cell lines . 0.78530588^^^ Characterization of adenosine deaminase binding to human CD 26 on T cells and its biologic role in immune response . 0.50524748^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :1.2292714
Recently , it has been demonstrated that adenosine deaminase interacts with a type 2 membrane protein known as either CD 26 or dipeptidylpeptidase 4 . 1.2292714^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.54942644
Adenosine deaminase ( ADA ) and the HIV 1 transactivator protein Tat have been reported to bind to human CD 26 , also known as dipeptidyl peptidase 4 ( DPP 4 ) . 0.54942644^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :1.0156846
Considerable evidence exists that CD 26 interacts , presumably in its extracellular domain , with both CD 45 , a protein tyrosine phosphatase , and adenosine deaminase ( ADA ) , each of which is capable of functioning in a signal transduction pathway . 1.0156846^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.86615472
Whereas some mAbs were shown to compete with each other and to inhibit the association of adenosine deaminase ( ADA ) and human immunodeficiency virus 1 ( HIV 1 ) derived Tat protein with CD 26 , other CD 26 specific mAbs obviously bind to distinct regions on DPP 4 . 0.86615472^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.58345571
In addition , human DPPIV , also known as the T cell activation antigen CD 26 , binds adenosine deaminase ( ADA ) to the T cell surface , thus protecting the T cell from adenosine mediated inhibition of proliferation . 0.58345571^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.6470309
The binding site of human adenosine deaminase for CD26 / Dipeptidyl peptidase 4 : the Arg142Gln mutation impairs binding to cd 26 but does not cause immune deficiency . 0.6470309^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.7744309
As dipeptidase , DPPIV modulates the activity of various biologically important peptides and , in addition , DPPIV acts as a receptor for adenosine deaminase ( ADA ) , thereby mediating co stimulatory signals in T lymphocytes . 0.7744309^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.67575789
Homodimeric DPP 4 interacts extracellularly with adenosine deaminase , and this interaction is critical for adenosine signaling and T cell proliferation . 0.67575789^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.63673612
ADA was coexpressed with CD 26 on the Jurkat T cell lines , and an in vitro binding assay showed that the binding was through the extracellular domain of CD 26 . 0.63673612^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.52607708
This study addresses the potential regulation by allosteric interactions of the catalytic activities of CD 26 associated with ecto ADA , which could define the mechanism of the synergism observed in T cell signaling . 0.52607708^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :1.0536307
In both cases , ADA binding is diminished by mutation of ADA residues known to interact with CD 26 . 1.0536307^^^ Human ADA binds to CD 26 on the surface 1 LN cells and immobilized CD 26 isolated from the same cells with similar affinity . 0.66761732^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
This molecule had been identified previously as the binding protein for adenosine deaminase ( ADAbp ) . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Assignment of the DPP 4 gene encoding adenosine deaminase binding protein ( CD26 / dipeptidylpeptidase 4 ) to 2q23 . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
In addition , we showed that CD 26 is a receptor for adenosine deaminase ( ADA ) . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
In addition , DPP 4 beta was found not to bind 125I labeled adenosine deaminase ( a property of human CD 26 ) . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
It is also known as CD 26 or adenosine deaminase ( ADA ; EC 3 . 5 . 4 . 4 ) binding protein . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
CD 26 is a lymphocyte marker that can anchor adenosine deaminase ( ADA ) on the T cell surface . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Regulation of epithelial and lymphocyte cell adhesion by adenosine deaminase CD 26 interaction . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Adenosine deaminase ( ADA ) can localize to the cell surface through its interaction with CD 26 . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Endothelial catabolism of extracellular adenosine during hypoxia : the role of surface adenosine deaminase and CD 26 . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
CD 26 is a surface glycoprotein with a key role in T cell function as the ADA binding protein . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Adenosine deaminase binding protein ( AdAbp ) , a glycoprotein found in the epithelial cells of the brush border of the proximal tubule , is shed into urine following kidney damage . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Expression of ecto adenosine deaminase and CD 26 in human T cells triggered by the TCR CD 3 complex . ^^^ The expression of surface adenosine deaminase ( ADA ) and CD 26 in activated human T cells was studied by flow cytometry . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
It was previously shown that CD 26 ( DPP 4 , EC 3 . 4 . 14 . 5 ) is a binding site for adenosine deaminase ( ADA , EC 3 . 5 . 4 . 4 ) on T cells and that costimulation by some anti CD 26 monoclonal antibodies ( mAbs ) and anti CD 3 induces CD4+ T cell proliferation . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
The relationship between CD26 / dipeptidyl peptidase 4 , an ectopeptidase involved in T cell activation , and the binding protein for adenosine deaminase ( ADAbp ) was studied . ^^^ Binding of adenosine deaminase to the lymphocyte surface via CD 26 . ^^^ The adenosine deaminase ( ADA ) itself blocked the binding of a specific set of anti CD 26 mAb ( among these the anti TA5 . 9 mAb ) on lymphocytic CD 26 ; ADA also hindered the binding of soluble CD 26 to the same immobilized anti CD 26 mAb . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Moreover , given the demonstration that CD26 / DPPIV is identical to the human adenosine deaminase ( ADA ) binding protein , it could be speculated that CD26 / DPPIV also may function by interacting with ADA to regulate the growth of CD26 / DPPIV expressing neoplastic cells in ALC lymphomas . . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Adenosine deaminase binding protein ( ADAbp ) is a cell surface glycoprotein that is expressed by normal melanocytes but not by melanoma , the malignant counterpart . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Use of immobilized adenosine deaminase ( EC 3 . 5 . 4 . 4 ) for the rapid purification of native human CD26 / dipeptidyl peptidase 4 ( EC 3 . 4 . 14 . 5 ) . ^^^ The calf intestinal adenosine deaminase we used is commercially available and can be employed for the purification of human , bovine and rabbit CD26 / dipeptidyl peptidase 4 . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
As activation progresses , the expression of DPPT L reaches a peak on day 3 , after which expression falls , whereas expression of the 105 kDa CD26 / DPPIV detected by the mAb 1F7 increases , as does the ability to bind adenosine deaminase . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
At the plasma membrane , an adenosine deaminase binding protein ( CD 26 , also known as dipeptidylpeptidase 4 ) has been identified but the functional role of this ADA / CD26 complex is unclear . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Independent of its catalytic activity , CD 26 has also been characterized as adenosine deaminase binding protein . ^^^ However , adenosine deaminase activity was not detectable on the surface of C 8166 cells in contrast to CD 26 positive MOLT 4 cells . ^^^ In accord with this , 125I labeled adenosine deaminase which binds CD 26 was found not to bind DPP 4 beta . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Adenosine deaminase in rodent median eminence : detection by antibody to the mouse enzyme and co localization with adenosine deaminase complexing protein ( CD 26 ) . ^^^ Tests for the presence of adenosine deaminase complexing protein ( CD 26 ) with an antibody against this protein gave positive labelling in the median eminence of both species and this labelling was co distributed with that seen for adenosine deaminase . ^^^ These results confirm the expression of adenosine deaminase in restricted populations of neurons in rodent brain as revealed with a novel antibody , suggest the presence of a distinct form or localization of the enzyme in the median eminence , and raise the possibility that it contributes , perhaps along with CD 26 , to purinergic regulation of hormone secretion in this structure . . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Adenosine deaminase binding to human CD 26 is inhibited by HIV 1 envelope glycoprotein gp 120 and viral particles . ^^^ CD 26 , known to be the adenosine deaminase ( ADA ) binding protein , has been implicated in HIV infection . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Human DPP 4 , isolated from seminal plasma by means of immobilised adenosine deaminase , occurs in different forms which are distinguishable by net charge and native molecular weight . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
HIV 1 envelope gp 120 and viral particles block adenosine deaminase binding to human CD 26 . ^^^ CD 26 , known to be the adenosine deaminase ( ADA ) binding protein , has been implicated in HIV infection . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Determination of adenosine deaminase binding domain on CD 26 and its immunoregulatory effect on T cell activation . ^^^ In the present study , we examined both the exact adenosine deaminase ( ADA ) binding domain on CD 26 and the functional consequences of mutated CD 26 transfectants that were deficient for cell surface ADA . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
The CP 1 subunit of adenosine deaminase complexing protein from calf kidney is identical to human , mouse , and rat dipeptidyl peptidase 4 . ^^^ The CP 1 subunit of calf kidney adenosine deaminase complexing protein ( ADCP ) , isolated by affinity chromatography based on Sepharose 4B immobilized adenosine deaminase , is identical with dipeptidyl peptidase 4 . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
To determine whether the transformation altered the cell line , the transformed cell line was characterized phenotypically using different monoclonal antibodies directed against peptidases , which are characteristic of PTEC , such as adenosine deaminase binding protein ( CD 26 ) , leucine amino peptidase and carboxy peptidase M by immunofluorescent staining and FACS analysis . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
No difference was found between the two enzymes enzymologically and immunologically , either in substrate specificity , susceptibility to inhibitors , or cross reactivity with an anti rat kidney DPP 4 antibody , or in their ability to bind adenosine deaminase . ^^^ These results suggest that membrane bound DPP 4 loses its transmembrane domain upon release into the serum , and that its structure on the plasma membrane is not required for its binding to adenosine deaminase . . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Specific DPPIV enzyme activity was correlated with the levels of CD4+ T cells ( r = 0 . 247 ; P < 0 . 02 ) , CD8+ T cells ( r = 0 . 236 ; P < 0 . 03 ) , and adenosine deaminase ( r = 0 . 227 ; P < 0 . 05 ) and had an inverse correlation with HIV 1 RNA ( Spearman ' s r = 0 . 474 ; P = 0 . 0012 ) . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
CD 26 and adenosine deaminase interaction : its role in the fusion between horse membrane vesicles and spermatozoa . ^^^ Horse sperm cells expressed at their surface A ( 1 ) adenosine receptors ( A ( 1 ) AR ) and ecto adenosine deaminase ( ecto ADA ) , both detected by immunoblot analysis , whereas CD 26 was visualized at the equatorial segment by immunofluorescence microscopy . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Dipeptidyl peptidase 4 and adenosine deaminase activity . ^^^ Dipeptidyl peptidase 4 ( DPPIV ) and adenosine deaminase ( ADA ) , two T cell associated enzymes , are known to have a possible interaction and play essential roles in immune system functioning . ^^^ Dipeptidyl peptidase 4 ( DPPIV ) and adenosine deaminase ( ADA ) , two T cell associated enzymes , are known to have a possible interaction and play essential roles in immune system functioning . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
On human T cells , CD 26 exhibits the co stimulatory function and plays an important role in immune response via its ability to bind adenosine deaminase ( ADA ) and association with CD 45 . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
CD 26 , a structure with an integral role in human T cell function that serves as the binding protein to adenosine deaminase , has been identified recently as a potential marker for certain aggressive T cell lymphomas . ^^^ To translate our knowledge of the basic biology of CD26 / adenosine deaminase into clinical practice and to develop specific treatment for T cell lymphomas based on CD 26 expression , we , at M . ^^^ This trial will evaluate the effect of pentostatin ( Nipent ) , a potent adenosine deaminase inhibitor with known efficacy against T cell malignancies , on relapsed / refractory T cell lymphomas in relation to CD 26 expression . . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
The HIV 1 gp 120 inhibits the binding of adenosine deaminase to CD 26 by a mechanism modulated by CD 4 and CXCR 4 expression . ^^^ HIV 1 external envelope glycoprotein gp 120 inhibits adenosine deaminase ( ADA ) binding to its cell surface receptor in lymphocytes , CD 26 , by a mechanism that does not require the gp 120 CD4 interaction . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
CD 26 is a T cell activation antigen known to bind adenosine deaminase and have dipeptidyl peptidase 4 activity . ^^^ CD 26 is a T cell activation antigen known to bind adenosine deaminase and have dipeptidyl peptidase 4 activity . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
The multifunctional type 2 transmembrane glycoprotein , dipeptidyl peptidase 4 ( DPPIV , EC 3 . 4 . 14 . 5 ) , is expressed by almost all mammalian cells and is identical to the adenosine deaminase binding protein CD 26 on lymphocytes . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
CD 26 anchors adenosine deaminase ( ADA ) to the lymphocyte cell surface , and this interaction is blocked by HIV 1 gp 120 . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
In addition to , but independent of its serine type catalytic activity , DPPIV binds closely to the soluble extracellular enzyme adenosine deaminase . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
CD 26 , being an adenosine deaminase binding protein ( ADAbp ) , functions as a receptor for ADA on lymphocytes . ^^^ CD 26 , being an adenosine deaminase binding protein ( ADAbp ) , functions as a receptor for ADA on lymphocytes . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
RESULTS : The pleural CD 26 levels , but not the serum CD 26 levels , in patients with tuberculous pleurisy were significantly higher than those in other groups , and were correlated with levels of adenosine deaminase and interferon gamma in the tuberculous pleural effusion . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
CD 26 is a T cell activation antigen that contains dipeptidyl peptidase 4 activity and is known to bind adenosine deaminase . ^^^ CD 26 is a T cell activation antigen that contains dipeptidyl peptidase 4 activity and is known to bind adenosine deaminase . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Serum interleukin 12 , interleukin 15 , soluble CD 26 , and adenosine deaminase in patients with rheumatoid arthritis . ^^^ The concentrations of IL 12 and IL 15 , and soluble CD 26 and adenosine deaminase ( enzymes related to CD 26 ) were analyzed in the serum of 35 patients with active and inactive RA and of healthy control subjects . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
On the regulatory role of dipeptidyl peptidase 4 ( =CD=adenosine deaminase complexing protein ) on adenosine deaminase activity . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Distribution and expression of A 1 adenosine receptors , adenosine deaminase and adenosine deaminase binding protein ( CD 26 ) in goldfish brain . ^^^ The expression patterns of adenosine A ( 1 ) receptors ( A ( 1 ) Rs ) , adenosine deaminase ( ADA ) and ADA binding protein ( CD 26 ) were studied in goldfish brain using mammalian monoclonal antibody against A ( 1 ) R and polyclonal antibodies against ADA and CD 26 . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
CD 26 is a T cell activation antigen that contains dipeptidyl peptidase 4 activity and binds adenosine deaminase . ^^^ CD 26 is a T cell activation antigen that contains dipeptidyl peptidase 4 activity and binds adenosine deaminase . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
The specific binding of adenosine deaminase to the multifunctional membrane glycoprotein dipeptidyl peptidase 4 is thought to be immunologically relevant for certain regulatory and co stimulatory processes . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
N linked glycosylation of dipeptidyl peptidase 4 ( CD 26 ) : effects on enzyme activity , homodimer formation , and adenosine deaminase binding . ^^^ The type 2 transmembrane serine protease dipeptidyl peptidase 4 ( DPPIV ) , also known as CD 26 or adenosine deaminase binding protein , is a major regulator of various physiological processes , including immune , inflammatory , nervous , and endocrine functions . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Dipeptidyl peptidase 4 ( DPPIV ) is a multifunctional cell surface protein that , as well as having dipeptidase activity , is the major binding protein for adenosine deaminase ( ADA ) and also binds extracellular matrix proteins such as fibronectin and collagen . ^^^ Dipeptidyl peptidase 4 ( DPPIV ) is a multifunctional cell surface protein that , as well as having dipeptidase activity , is the major binding protein for adenosine deaminase ( ADA ) and also binds extracellular matrix proteins such as fibronectin and collagen . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
CD 26 or dipeptidyl peptidase 4 ( DPPIV ) is engaged in immune functions by co stimulatory effects on activation and proliferation of T lymphocytes , binding to adenosine deaminase , and regulation of various chemokines and cytokines . ^^^ CD 26 or dipeptidyl peptidase 4 ( DPPIV ) is engaged in immune functions by co stimulatory effects on activation and proliferation of T lymphocytes , binding to adenosine deaminase , and regulation of various chemokines and cytokines . ^^^ The 2 . 0 and 3 . 15 A resolution crystal structures of the binary complex between human DPPIV and nonapeptide Tat ( 1 9 ) and the ternary complex between the variant MWPVDPNIE , called Trp ( 2 ) Tat ( 1 9 ) , and DPPIV bound to adenosine deaminase show that Tat ( 1 9 ) and Trp ( 2 ) Tat ( 1 9 ) are located in the active site of DPPIV . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
CD 26 , adenosine deaminase , and adenosine receptors mediate costimulatory signals in the immunological synapse . ^^^ Adenosine deaminase ( ADA ) , a protein whose deficit leads to severe combined immunodeficiency , binds to the cell surface by means of either CD 26 , A ( 1 ) adenosine receptors , or A ( 2B ) adenosine receptors . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
In this study , we examined the involvement of ecto adenosine deaminase , which can be anchored to CD 26 on human gingival fibroblasts , in metabolizing adenosine generated by CD 73 , and thus attenuating adenosine receptor activation . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
BACKGROUND : CD 26 is a T cell co stimulator , and interacts with adenosine deaminase , human immunodeficiency virus ( HIV ) Tat 1 protein and extracellular matrix . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
We also use the recent identification of the ADA binding protein as DPPIV to propose that the gene ADCP 2 should be renamed DPP4 . . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
CD 26 , the T cell activation antigen , is identical to the ADA binding protein and is considered to interact with ADA to activate the T cells on the surface . ^^^ Therefore , we examined the activity of serum ADA isoenzymes in patients with Graves ' disease in whom CD 26 presented T cells were increased . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
In this paper , we describe further characterization of the membrane associated molecule CD26 / dipeptidyl peptidase 4 ( DPP 4 ) , which is said to be adenosine deaminase binding protein ( ADA bp ) in humans , to clarify its association with ADA in rat immune cells . ^^^ For this purpose , we used three types of rats : DPP IV+ rats ; DPP 4 rats , which lack enzyme activity and immunological reactivity of DPP 4 ; and ADA rats , which have reduced ADA activity due to continuous peritoneal injection of 2 ' DCF , a potent inhibitor of ADA . ^^^ ADA existed in the cells of DPP IV+ and DPP 4 rats , but it did not exist on the cell surface in either rat . ^^^ ADA rats showed a decrease in ADA activity and in the number of immune cells , but no effect on DPP 4 was observed . ^^^ These data suggest that in rats , in contrast to humans , DPP 4 does not exist as ADA bp . . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
Apart from degrading extracellular adenosine ( Ado ) or 2 ' deoxyadenosine ( dAdo ) , which are toxic for lymphocytes , ecto ADA has an extraenzymatic function via its interaction with CD 26 . ^^^ The fact that , besides CD 26 , ADA can interact with different cell surface proteins opens new perspectives in the research for a role of ecto ADA in the function of the immune system and in the interactions that take place between different cells in the development of the immune system . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
This `` ecto ADA ' ' has been postulated to regulate extracellular Ado levels , and also the function of CD 26 as a co stimulator of activated T cells . ^^^ The CD 26 binding site of human ADA has been localized by homolog scanning to the peripheral alpha 2 helix ( amino acids 126 143 ) . ^^^ Among the 5 non conserved residues within this segment , Arg 142 in human and Gln 142 in mouse ADA largely determined the capacity for stable binding to CD 26 ( Richard , E . , Arredondo Vega , F . ^^^ We have now mutagenized conserved alpha 2 helix residues in human and mouse ADA and used surface plasmon resonance to evaluate binding kinetics to immobilized rabbit CD 26 . ^^^ In addition to Arg 142 , we found that Glu 139 and Asp 143 of human ADA are also important for CD 26 binding . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
In a prospective study , surface expression of CD 26 , 3 , 4 , 8 , 45 , 122 and ADA on PBL and DPP 4 serum activity were measured in kidney recipients for 24 months post transplantation . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
ADA exists as cytosolic and extracellular forms , the latter colocalized on the cell surface with CD 26 . ^^^ Once the surface expression of CD 26 and ADA in a panel of cell lines and primary samples of T cell leukemia / lymphoma was defined , we correlated this expression with the antiproliferative and apoptotic effect of dCF . ^^^ This conclusion was sustained by a decreased sensitivity to dCF mediated proapoptotic and / or antiproliferative in vitro effects of : ( a ) leukemia / lymphoma T cell lines expressing surface CD26 / ADA complex ; ( b ) primary CD 26 ( + ) T cell malignancies ; and ( c ) normal T cells ( CD 26 ( + ) ) as compared with tumor T cells ( CD 26 ( ) ) in unpurified samples from three cases of T cell receptor gammadelta ( + ) T cell malignancies characterized by a mixture of normal and neoplastic cells . ^^^
Interacting proteins: P00813 and P27487 Pubmed SVM Score :0.0
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