Human Muscle Phosphoglycerate Mutase Deficiency: Newly Discovered Metabolic Myopathy

Details Human Muscle Phosphoglycerate Mutase Deficiency: Newly Discovered Metabolic Myopathy Human Muscle Phosphoglycerate Mutase Deficiency: Newly Discovered Metabolic Myopathy

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981sci...212.1277d&link_type=abstract

Science, Volume 212, Issue 4500, pp. 1277-1279

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Scientific paper

Muscle phosphoglycerate mutase activity was decreased (5.7 percent of the lowest control value) in a 52-year-old man with intolerance for strenuous exercise and recurrent pigmenturia since adolescence. All of the other enzymes of glycolysis had normal activities, and glycogen concentration was normal. Electrophoretic, heat lability, and mercury inhibition studies showed that the small residual activity in the patient's muscle was represented by the brain (BB) isoenzyme of phosphoglycerate mutase, suggesting a genetic defect of the M subunit which predominates in normal muscle. The prevalence of the BB isoenzyme in other tissues, including muscle culture, may explain why symptoms were confined to muscle.

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