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Dipeptidyl peptidase 2 is an essential survival factor in the regulation of cell quiescence.
Mele DA, et al.
Cell Cycle, 15, 2425-2434 (2009)
Ratnakar Singh et al.
The FEBS journal, 281(6), 1629-1641 (2014-01-30)
Dipeptidyl-peptidase III (DPP III) is a cytosolic metallo-aminopeptidase implicated in various physiological and pathological processes. A previous study from our laboratory indicated an elevated expression of DPP III in glioblastoma (U87MG) cells. In the present study we investigated the role...
Gustavo Arruda Bezerra et al.
PloS one, 7(8), e43019-e43019 (2012-09-07)
Proline-specific dipeptidyl peptidases (DPPs) are emerging targets for drug development. DPP4 inhibitors are approved in many countries, and other dipeptidyl peptidases are often referred to as DPP4 activity- and/or structure-homologues (DASH). Members of the DASH family have overlapping substrate specificities...
Edgar Deu et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(45), 18244-18249 (2013-10-23)
The precise targeting of cytotoxic agents to specific cell types or cellular compartments is of significant interest in medicine, with particular relevance for infectious diseases and cancer. Here, we describe a method to exploit aberrant levels of mobile ferrous iron...
Yuko Ohara-Nemoto et al.
The Journal of biological chemistry, 289(9), 5436-5448 (2014-01-09)
Porphyromonas gingivalis, a Gram-negative asaccharolytic anaerobe, is a major causative organism of chronic periodontitis. Because the bacterium utilizes amino acids as energy and carbon sources and incorporates them mainly as dipeptides, a wide variety of dipeptide production processes mediated by...
Robert C C Mercer et al.
The Journal of biological chemistry, 288(52), 37241-37255 (2013-11-15)
Widely expressed in the adult central nervous system, the cellular prion protein (PrP(C)) is implicated in a variety of processes, including neuronal excitability. Dipeptidyl aminopeptidase-like protein 6 (DPP6) was first identified as a PrP(C) interactor using in vivo formaldehyde cross-linking...
Hennady P Shulha et al.
PLoS biology, 10(11), e1001427-e1001427 (2012-11-28)
Cognitive abilities and disorders unique to humans are thought to result from adaptively driven changes in brain transcriptomes, but little is known about the role of cis-regulatory changes affecting transcription start sites (TSS). Here, we mapped in human, chimpanzee, and...
Michalis Koureas et al.
Occupational and environmental medicine, 71(2), 126-133 (2013-11-05)
To evaluate the exposure of different population groups in Thessaly (Greece) to organophosphate pesticides (OPs) and investigate the dependence of exposure levels on pesticide application practices, personal protective and hygienic measures taken. For the exposure assessment, four dialkyl phosphate (DAP)...
Mai Nakashima et al.
The Journal of biological chemistry, 288(46), 33171-33180 (2013-10-08)
Continued proliferation of human cells requires maintenance of telomere length, usually accomplished by telomerase. Telomerase is recruited to chromosome ends by interaction with a patch of amino acids (the TEL patch, for TPP1 glutamate (E) and leucine (L)-rich patch) on...
Romina Kohan et al.
Gene, 516(1), 114-121 (2012-12-26)
Tripeptidyl-peptidase 1 (TPP1) null or residual activity occurs in neuronal ceroid lipofuscinosis (NCL) with underlying TPP1/CLN2 mutations. A survey of 25 South American CLN2 affected individuals enabled the differentiation of two phenotypes: classical late-infantile and variant juvenile, each in approximately...
Eric B Harstad et al.
Regulatory peptides, 186, 26-35 (2013-07-16)
Dipeptidyl peptidases (DPPs) are proteolytic enzymes that regulate many physiological systems by degrading signaling peptides. DPP8 and DPP9 are distinct from DPP4 in sequence, cellular localization and expression levels, thus implying distinct functions. However, DPP8 and DPP9 expression needs further...
Mahesh Kamate et al.
Neurology India, 60(3), 316-320 (2012-07-25)
Neuronal ceroid lipofuscinosis is a group of progressive neurodegenerative disorders characterized by accumulation of ceroid lipopigment in lysosomes in neurons and other cell types. This study is a retrospective review of charts of patients with a diagnosis of infantile and...
Lin Zhu et al.
The Journal of general and applied microbiology, 58(3), 199-209 (2012-08-11)
Proteolytic degradation is one of the serious bottlenecks limiting the yields of heterologous protein production by Aspergillus oryzae. In this study, we selected a tripeptidyl peptidase gene AosedD (AO090166000084) as a candidate potentially degrading the heterologous protein, and performed localization...
Martin Kruse et al.
The Journal of general physiology, 140(2), 189-205 (2012-08-02)
Phosphatidylinositol 4,5-bisphosphate (PI(4,5)P(2)) regulates activities of numerous ion channels including inwardly rectifying potassium (K(ir)) channels, KCNQ, TRP, and voltage-gated calcium channels. Several studies suggest that voltage-gated potassium (K(V)) channels might be regulated by PI(4,5)P(2). Wide expression of K(V) channels in...
Esther Pilla et al.
The Journal of biological chemistry, 287(53), 44320-44329 (2012-11-16)
Sumoylation affects many cellular processes by regulating the interactions of modified targets with downstream effectors. Here we identified the cytosolic dipeptidyl peptidase 9 (DPP9) as a SUMO1 interacting protein. Surprisingly, DPP9 binds to SUMO1 independent of the well known SUMO...
Katrin Witzel et al.
Neuropharmacology, 63(8), 1389-1403 (2012-09-12)
We examined the effects of the sulfonylurea compound NS5806 on neuronal A-type channel function. Using whole-cell patch-clamp we studied the effects of NS5806 on the somatodendritic A-type current (I(SA)) in cultured hippocampal neurons and the currents mediated by Kv4.2 channels...
S Radicke et al.
Journal of molecular and cellular cardiology, 56, 8-18 (2013-01-08)
In human atrial myocytes the transient outward current I(to) develops a conspicuous faster inactivation with increasing temperatures. Since β-subunits are known to modulate I(to) current kinetics, we hypothesized that the temperature sensitivity of I(to) is not only determined by the...
Ayman Sabra et al.
Infection and immunity, 82(1), 413-422 (2013-11-06)
Candida lusitaniae is an emerging opportunistic yeast and an attractive model to discover new virulence factors in Candida species by reverse genetics. Our goal was to create a dpp3Δ knockout mutant and to characterize the effects of this gene inactivation...
Anna Boronat et al.
Annals of neurology, 73(1), 120-128 (2012-12-12)
To report a novel cell surface autoantigen of encephalitis that is a critical regulatory subunit of the Kv4.2 potassium channels. Four patients with encephalitis of unclear etiology and antibodies with a similar pattern of neuropil brain immunostaining were selected for...
Katsuya Usukura et al.
Journal of cancer research and clinical oncology, 139(1), 123-130 (2012-09-19)
Tripeptidyl peptidase II (TPP2), a member of the family of eukaryotic serine peptidase, has been implicated in DNA repair, cellular division, and apoptosis. The aim of this study was to examine TPP2 expression and its functional mechanisms in oral squamous...
Wengen Wu et al.
Bioorganic & medicinal chemistry letters, 22(17), 5536-5540 (2012-08-03)
The boroProline-based dipeptidyl boronic acids were among the first DPP-IV inhibitors identified, and remain the most potent known. We introduced various substitutions at the 4-position of the boroProline ring regioselectively and stereoselectively, and incorporated these aminoboronic acids into a series...
Bridgid E Hast et al.
Cancer research, 73(7), 2199-2210 (2013-02-06)
Somatic mutations in the KEAP1 ubiquitin ligase or its substrate NRF2 (NFE2L2) commonly occur in human cancer, resulting in constitutive NRF2-mediated transcription of cytoprotective genes. However, many tumors display high NRF2 activity in the absence of mutation, supporting the hypothesis...
Alvaro Paniagua Bravo et al.
Clinical neuroradiology, 23(3), 189-196 (2012-12-25)
The two most prevalent forms of neuronal ceroid lipofuscinosis (NCL) are the juvenile form (Batten disease, CLN3) and late infantile form (Jansky-Bielschowsky disease, CLN2). The aim of this study was to compare quantitative T2-values of brain tissue in CLN2 and...
Can Liao et al.
European journal of medical genetics, 56(9), 484-489 (2013-07-09)
The molecular basis of autosomal dominant microcephaly, a disorder associated with small head circumferences that results in variable mental retardation, is largely unknown. In the present study, we conducted a variation analysis of the DPP6 gene in patients with autosomal...
Arunava Ghosh et al.
The Journal of biological chemistry, 287(46), 38922-38935 (2012-09-20)
The classical late infantile neuronal ceroid lipofuscinosis (LINCLs) is an autosomal recessive disease, where the defective gene is Cln2, encoding tripeptidyl-peptidase I (TPP1). At the molecular level, LINCL is caused by accumulation of autofluorescent storage materials in neurons and other...
Timsi Rao et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(1), 214-218 (2013-12-18)
Telomerase is essential for continuous cellular proliferation. Substantial insights have come from studies of budding yeast telomerase, which consists of a catalytic core in association with two regulatory proteins, ever shorter telomeres 1 and 3 (Est1 and Est3). We report...
Barbara Leiting et al.
The Biochemical journal, 371(Pt 2), 525-532 (2003-01-17)
There is currently intense interest in the emerging group of proline-specific dipeptidases, and their roles in the regulation of biological processes. Dipeptidyl peptidase IV (DPP-IV) is involved in glucose metabolism by contributing to the regulation of glucagon family peptides and...
Jaba Gamrekelashvili et al.
The Journal of clinical investigation, 123(11), 4755-4768 (2013-11-13)
Cross-priming of CD8+ T cells and generation of effector immune responses is pivotal for tumor immunity as well as for successful anticancer vaccination and therapy. Dead and dying cells produce signals that can influence Ag processing and presentation; however, there...
Brian D Green et al.
Diabetes & vascular disease research, 3(3), 159-165 (2006-12-13)
Inhibitors of the enzyme dipeptidyl peptidase IV (DPP IV) provide a strategy for the treatment of type 2 diabetes. DPP IV rapidly inactivates the incretin hormones glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP). Inhibition of DPP IV prolongs and...
Evans Menach et al.
Bioscience, biotechnology, and biochemistry, 77(9), 1901-1906 (2013-09-11)
Most zinc metalloproteinases have the consensus zinc-binding motif sequence HEXXH, in which two histidine residues chelate a catalytic zinc ion. The zinc-binding motif sequence of thermolysin, H(142)ELTH(146), belongs to this motif sequence, while that of dipeptidyl peptidase III (DPP III)...