37294
Dihydrofolate Reductase from bovine liver
~8 U/mL, ammonium sulfate suspension, off-white
Synonym(s):
Tetrahydrofolate Dehydrogenase
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About This Item
CAS Number:
MDL number:
UNSPSC Code:
12352204
NACRES:
NA.54
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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 Code
10 - Combustible liquids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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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
Shengxi Chen et al.
Journal of the American Chemical Society, 134(46), 18883-18885 (2012-11-03)
Because of the lack of sensitivity to small changes in distance by available FRET pairs (a constraint imposed by the dimensions of the enzyme), a DHFR containing two pyrene moieties was prepared to enable the observation of excimer formation. Pyren-1-ylalanine
Luca Belmonte et al.
Critical reviews in eukaryotic gene expression, 22(3), 219-232 (2012-11-13)
A state-of-the-art review of the role of the Langmuir-Blodgett nanotemplate on protein crystal structures is here presented. Crystals grown by nanostructured template appear more radiation resistant than the classical ones, even in the presence of a third-generation highly focused beam
Tetsuo Shimizu et al.
Anticancer research, 32(10), 4589-4596 (2012-10-13)
Pemetrexed inhibits three key folate enzymes: thymidylate synthetase (TYMS), dihydrofolate reductase (DHFR), and glycinamide ribonucleotide formyltransferase (GARFT). The relationship between the clinical efficacy of pemetrexed and the expression of folate enzymes in lung cancer cells is unknown. The purpose of
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
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