Homocystinuria associated with decreased methylenetetrahydrofolate reductase activity

S. Harvey Mudd, B. William Uhlendorf, John M. Freeman, James D. Finkelstein, Vivian E. Shih

Research output: Contribution to journalArticlepeer-review


A new type of homocystinuria is described. A variety of evidence indicates that patients with this type of homocystinuria are not deficient in cystathionine synthase activity. Fibroblasts from these patients were unable to grow as rapidly as control fibroblasts if homocystine replaced methionine in the culture medium. N5-Methyltetrahydrofolate-homocysteine methyltransferase activity in these cells was not markedly decreased, whereas methylenetetrahydrofolate reductase activity was significantly below normal. A deficiency of this reductase activity can explain the biochemical abnormalities in these patients.

Original languageEnglish (US)
Pages (from-to)905-912
Number of pages8
JournalBiochemical and Biophysical Research Communications
Issue number2
StatePublished - Jan 31 1972

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


Dive into the research topics of 'Homocystinuria associated with decreased methylenetetrahydrofolate reductase activity'. Together they form a unique fingerprint.

Cite this