37294
Dihydrofolate Reductase from bovine liver
~8 U/mL, ammonium sulfate suspension, off-white
Sinónimos:
Tetrahydrofolate Dehydrogenase
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About This Item
Número de CAS:
MDL number:
UNSPSC Code:
12352204
NACRES:
NA.54
Productos recomendados
biological source
bovine liver
Quality Level
form
ammonium sulfate suspension
specific activity
≥6 U/mg protein
concentration
~8 U/mL
color
off-white
density
1.2 g/mL at 20 °C
storage temp.
2-8°C
Application
Dihydrofolate reductase (DHFR) is involved in the synthesis of purines, thymidine and glycine in folate metabolism. DHFR, from bovine liver, is used for methotrexate analysis . DHFR is useful to study various cancers such as sarcomas, leukemias and head and neck cancers .
Biochem/physiol Actions
Dihydrofolate reductase (DHFR) reduces dihydrofolic acid to tetrahydrofolic acid, using NADPH as an electron donor. The binding of antitumor agents, such as methotrexate, to DHFR prevents the formation of reduced folates, which are essential for DNA synthesis .
Unit Definition
1 U corresponds to the amount of enzyme which converts 1 μmol 7,8-dihydrofolate and NADPH to 5,6,7,8-tetrahydrofolate and NADP per minute at pH 6.5 and 25 °C
Physical form
Suspension in 3.6 M ammonium sulfate solution, pH 7.0
Other Notes
In folate metabolism for the synthesis of purines, thymidine and glycine
Sales restrictions may apply
Storage Class
10 - Combustible liquids
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves
Certificados de análisis (COA)
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Use of dihydrofolate reductase from bovine liver, rather than from L. casei, for determining methotrexate.
R J Brooks
Clinical chemistry, 24(3), 518-519 (1978-03-01)
M A Pesce et al.
Clinical chemistry, 27(3), 380-384 (1981-03-01)
Methotrexate was determined by the homogeneous enzyme immunoassay (EMIT) with the Multistat and CentrifiChem centrifugal analyzers and by the enzyme inhibition assay with use of the Multistat centrifugal analyzer. With both methods, the standard curve extends from 0.2 to 2.0
H B Eastman et al.
Proceedings of the National Academy of Sciences of the United States of America, 88(19), 8572-8576 (1991-10-01)
Dihydrofolate reductase (DHFR; EC 1.5.1.3) is required in folate metabolism for the synthesis of purines, thymidine, and glycine. Although there have been several reports of induction of DHFR enzyme by methotrexate (MTX), a drug that competitively inhibits DHFR, there are
Luca Freschi et al.
Molecular bioSystems, 9(1), 36-43 (2012-10-27)
One of the most important challenges in systems biology is to understand how cells respond to genetic and environmental perturbations. Here we show that the yeast DHFR-PCA, coupled with high-resolution growth profiling (DHFR-qPCA), is a straightforward assay to study the
Inbar Avraham et al.
Proceedings of the National Academy of Sciences of the United States of America, 109(52), E3678-E3686 (2012-12-01)
Plasmodium falciparum causes the deadliest form of human malaria. Its virulence is attributed to its ability to modify the infected RBC and to evade human immune attack through antigenic variation. Antigenic variation is achieved through tight regulation of antigenic switches
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