Molecular genetic studies in muscle phosphoglycerate mutase (PGAM-M) deficiency

S. Tsujino, S. Shanske, S. Sakoda, A. Toscano, S. DiMauro

Research output: Contribution to journalArticlepeer-review

Abstract

Phosphoglycerate mutase (PGAM; EC 2.7.5.3) catalyzes the interconversion of 2-phosphoglycerate and 3-phosphoglycerate in the glycolytic pathway. Hereditary muscle PGAM deficiency has been identified in 9 patients with myopathy. All patients had exercise intolerance and 6 had myoglobinuria. Seven of the 9 patients were African-Americans: 5 of them were homozygous for a nonsense mutation, TGG(Trp) to TAG at codon 78; 1 was a compound heterozygote for the nonsense mutation and a missense mutation, GAG(Glu) to GCG(Ala) at codon 89; and 1 could not be tested. The only 2 Caucasian patients, a brother and sister, were homozygous for a different missense mutation, CGG(Arg) to TGG(Trp) at codon 90. Despite the small number of patients identified, these findings indicate that there is a common mutation in African-Americans while there may be molecular genetic heterogeneity in other ethnic groups.

Original languageEnglish
JournalMuscle and Nerve
Volume18
Issue numberSUPPL. 3
Publication statusPublished - 1995

Keywords

  • genetic mutation
  • metabolic myopathy
  • molecular genetic heterogeneity
  • muscle phosphoglycerate mutase deficiency
  • phosphoglycerate mutase

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

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