NAD-dependent methylenetetrahydrofolate dehydrogenase is expressed by immortal cells.

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NAD-dependent methylenetetrahydrofolate dehydrogenase is expressed by immortal cells.

An enzyme activity not detected in normal cells is expressed in embryonic, undifferentiated, or transformed cells. Twenty-one established mammalian cell lines, both tumorigenic and nontumorigenic, were found to have an NAD-dependent methylenetetrahydrofolate dehydrogenase (Scrimgeour, K.G., and Huennekens, F.M. (1960) Biochem. Biophys. Res. Commun. 2, 230-233) in addition to the well-characteri...

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NAD-dependent methylenetetrahydrofolate dehydrogenase-methenyltetrahydrofolate cyclohydrolase is targeted to the cytoplasm in insect cell lines.

Cytosolic NADP-dependent methylenetetrahydrofolate dehydrogenase-cyclohydrolase synthetase and the mitochondrial NAD-dependent methylenetetrahydrofolate dehydrogenase-cyclohydrolase (NMDMC) are differentially expressed during insect development although both enzymes are detectable at all stages. In contrast, cell lines derived from a variety of insect species express high levels of NMDMC but un...

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Mammalian fibroblasts lacking mitochondrial NAD+-dependent methylenetetrahydrofolate dehydrogenase-cyclohydrolase are glycine auxotrophs.

Primary fibroblasts established from embryos of NAD-dependent mitochondrial methylenetetrahydrofolate dehydrogenase-cyclohydrolase (NMDMC) knockout mice were spontaneously immortalized or transformed with SV40 Large T antigen. Mitotracker Red CMXRos staining of the cells indicates the presence of intact mitochondria with a membrane potential. The nmdmc(-/-) cells are auxotrophic for glycine, de...

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Cloning and characterization of the Saccharomyces cerevisiae gene encoding NAD-dependent 5,10-methylenetetrahydrofolate dehydrogenase.

Saccharomyces cerevisiae possess a monofunctional, cytoplasmic NAD-dependent 5,10-methylenetetrahydrofolate (THF) dehydrogenase that converts 5,10-methylene-THF to 5,10-methenyl-THF (Barlowe, C. K., and Appling, D.R. (1990) Biochemistry 29, 7089-7094). We have now isolated the gene encoding this enzyme from a yeast genomic library using oligonucleotide probes based on internal peptide sequences...

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The X-ray structure of the NAD-dependent 5,10-methylenetetrahydrofolate dehydrogenase from Saccharomyces cerevisiae.

Eucaryotes possess one or more NADP-dependent methylene-THF dehydrogenases as part of multifunctional enzymes. In addition, yeast expresses an unusual monofunctional NAD-dependent enzyme, yMTD. We report X-ray structures for the apoenzyme and its complex with NAD+ at 2.8 and 3.0 A resolution, respectively. The protein fold resembles that seen for the human and Escherichia coli dehydrogenase/cyc...

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ژورنال

عنوان ژورنال: Journal of Biological Chemistry

سال: 1985

ISSN: 0021-9258

DOI: 10.1016/s0021-9258(17)38612-x