MTHFD1

(redirected from cytoplasmic C-1-tetrahydrofolate synthase)

MTHFD1

A gene on chromosome 14q24 that encodes an enzyme that has three distinct enzymatic activities:
• 5,10-methylenetetrahydrofolate dehydrogenase (E.C. 1.5.1.5);
• 5,10-methenyltetrahydrofolate cyclohydrolase (E.C. 3.5.4.9); and
• 10-formyltetrahydrofolate synthetase (E.C. 6.3.4.3).
These activities interconvert methyl (1-carbon) derivatives of tetrahydrofolate, which serve as substrates for methionine, thymidylate and de novo purine synthesis.

Molecular pathology
Defects in MTHFD1 may increase susceptibility to folate-sensitive neural tube defects and colorectal cancer.
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