Galactosemia: alterations in sulfate metabolism secondary to galactose-1-phosphate uridyltransferase deficiency

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Science  28 Sep 1979:
Vol. 205, Issue 4413, pp. 1395-1397
DOI: 10.1126/science.472754


Cultures of nonmutant as well as galactokinase-deficient fibroblasts incorporate 20 percent more [35S]sulfate when galactose is substituted for glucose in the medium; galactose-1-phosphate uridyltransferase-deficient cells incorporate 65.5 percent less. In addition to incorporating less [35S]sulfate, the uridyltransferase-deficient cells showed significant accumulation of intracellular galactose-1-phosphate within 4 hours after galactose exposure. Under the same conditions, no difference in [3H]uridine incorporation was observed. This metabolic alteration, occurring in response to galactose exposure, may be related to the pathophysiology of classical galactosemia.