Intra-assay Precision (Precision within an assay): CV%<8%
Three samples of known concentration were tested twenty times on one plate to assess.
Inter-assay Precision (Precision between assays):CV%<10%
Three samples of known concentration were tested in twenty assays to assess.
線性度:
To assess the linearity of the assay, samples were spiked with high concentrations of human TPI1 in various matrices and diluted with the Sample Diluent to produce samples with values within the dynamic range of the assay.
Sample
Serum(n=4)
1:1
Average %
106
Range %
100-112
1:2
Average %
95
Range %
92-99
1:4
Average %
90
Range %
86-96
1:8
Average %
93
Range %
90-97
回收率:
The recovery of human TPI1 spiked to levels throughout the range of the assay in various matrices was evaluated. Samples were diluted prior to assay as directed in the Sample Preparation section.
Sample Type
Average % Recovery
Range
Serum (n=5)
103
99-107
EDTA plasma (n=4)
92
85-95
標(biāo)準(zhǔn)曲線:
These standard curves are provided for demonstration only. A standard curve should be generated for each set of samples assayed.
Triosephosphate isomerase is an extremely efficient metabolic enzyme that catalyzes the interconversion between dihydroxyacetone phosphate (DHAP) and D-glyceraldehyde-3-phosphate (G3P) in glycolysis and gluconeogenesis.; It is also responsible for the non-negligible production of methylglyoxal a reactive cytotoxic side-product that modifies and can alter proteins, DNA and lipids.
基因功能參考文獻(xiàn):
Disease-associated variants change well-conserved residues in the protein's sequence and affect protein stability. PMID: 28341520
A guide to the effects of a large portion of the residues of triosephosphate isomerase on catalysis, stability, druggability, and human disease has been presented. (Review) PMID: 28378917
Results revealed that TPI expression might be considered as a novel prognostic factor to evaluate gastric cancer patients' survival PMID: 28489783
TPI1 functions as a tumor suppressor in hepatocellular carcinoma and might serve as a potential therapeutic target for the treatment of HCC PMID: 27908734
our findings are the first to identify, to our knowledge, a functional synaptic defect in TPI deficiency derived from molecular changes in the TPI dimer interface. PMID: 27031109
Polyvinylpyrrolidone stabilised silver nanoparticles (60 nM; 2-6 nm diameter) selectively inhibited PfTIM with a 7-fold decrease in enzyme catalytic efficiency (K(cat)/K(m)) over hTIM. PMID: 26353595
results suggest amyloid-beta oligomers induce neuronal death by triggering methylglyoxal(MG) production; increased release of MG is a direct consequence of triosephosphate isomerase nitrotyrosination due to amyloid-beta peptide action at the 2 tyrosines associated with the catalytic center PMID: 24614897
TPI-PEP co-crystal structure, demonstrating that PEP directly binds into the catalytic pocket of TPI. PMID: 24598263
E104D mutant is highly susceptible to proteolysis, which in all likelihood contributes to the pathogenesis of enzymopathy. In addition, the proteolysis data on wild type HsTIM illustrate an asymmetric conduct of the two monomers. PMID: 24056040
Data suggest that exchange reactions during gluconeogenesis catalyzed by triose-phosphate isomerase and transaldolase do not differ between subjects with type 2 diabetes and control subjects under fasting or hyperglycemic conditions. PMID: 23736541
we review the relationship between modified TPI and Alzheimer disease (AD), highlighting the relevance of this protein in AD pathology PMID: 23233058
study found promoter SNPs of CKB and TPI1 were weakly associated with schizophrenia;in addition, IFNG polymorphisms were associated with schizophrenia; results suggest that IFNG and proteins affected by IFNG may play a role in the pathogenesis of schizophrenia PMID: 22623148
[Review] The activity of glycolytic enzyme TPI reveals a mechanistic link between energy metabolism and age-related proteostatic dysfunction which can suppress generation of altered proteins that characterize the aged phenotype in cells and tissues. PMID: 21651995
A patient with triosephosphate isomerase-deficiency was found to be homozygous for a Val231Met mutation. PMID: 21215915
A proteomic approach for identification and localization of the pericellular components of chondrocytes. PMID: 21698479
structural changes rather than abnormal catalysis may play an important role in the clinical manifestations of TPI deficiency; the postulated high aggregation ability of the unstable Glu104Asp mutant would lead to more serious symptoms PMID: 20546019
TPI1 were up-regulated with the malignancy of prostate cancer cell lines and have their potential as serum biomarkers for indicating the developmental stage of prostate cancer. PMID: 20233700
of two previously undescribed mutations: c.722 T>C (Phe240Ser) and c.28 insG; each of the two unrelated patients showed the new mutation in compound heterozygosity with the most common variant Glu104Asp, resulting in a very severe clinical pattern. PMID: 20374271
the dimerization behavior of TPI is influenced by the particular mutations investigated, and by the use of a potential alternative translation initiation site in the TPI gene PMID: 17183658
kinetic, thermodynamic, structural and ultrastructural data for characterization of mutant isomerase structures and for the TPI-related metabolic processes in normal and deficient cells PMID: 12023819
Minor structural changes in a mutated human melanoma antigen (TPI) correspond to dramatically enhanced stimulation of a CD4+ tumor-infiltrating lymphocyte line. PMID: 12051920
A patient with triosephosphate isomerase (TPI) deficiency exhibited worsening of abnormal involuntary movements of the dystonic type and developed psychiatric symptoms while on selegiline. PMID: 14743370
IgG-type anti-TPI autoantibodies were detected in 24.7% of the serum samples and 24.1% of the synovial fluid samples from the patients with osteoarthritis PMID: 15146421
anti-TPI antibodies are closely associated with neuropsychiatric lupus PMID: 15358119
We found that a low TPI activity in the mutant cells (lower than predicted from the protein level and specific activity of the purified recombinant enzyme) is coupled with an increase in the activities of glycolytic kinases PMID: 16086671
Mutations causing TPI deficiency in humans are characterized by progressive neurological dysfunction, neurodegeneration, and early death. PMID: 17008404
TPI and GAPDH may be candidate Ags for an autoimmune response to neurons and axons in multiple sclerosis. PMID: 17015754
anti-TPI form immune complexes in CSF and contribute to the pathogenesis of neuropsychiatric lupus by activating the complement system PMID: 17064784
Triosephosphate isomerase (TPI), a glycolytic pathway enzyme, was identified as a downregulated protein in SGC7901/VCR cells PMID: 18309519
TPI variants occur less frequent than expected and inactive alleles are not enriched in German centenarians PMID: 18510744
human triosephosphate isomerase mutation E104D is related to alterations of a conserved water network at the dimer interface PMID: 18562316
Population samples from Angola, Mozambique and S. Tome e Principe has 3 haplotypes of the TPI gene promoter variants -5A-8G-24T,-5G-8G-24T and -5G-8A-24T in malaria-infected individuals. PMID: 18792062
This protein has been found differentially expressed in the Wernicke's Area from patients with schizophrenia. PMID: 19405953