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The molecular basis of glucose-6-phosphate dehydrogenase deficiency
T Vulliamy1, P Mason, L Luzzatto
1Department of Haematology, Royal Postgraduate Medical School, Hammersmith Hospital, London, UK.
Insights
Glucose-6-phosphate dehydrogenase (G6PD) deficiency affects 400 million people globally. Research suggests female heterozygotes gain a selective advantage against malaria, driving G6PD polymorphism.
Area of Science:
- Biochemistry
- Human Genetics
- Enzymology
Background:
- Glucose-6-phosphate dehydrogenase (G6PD) is a highly polymorphic human enzyme with over 300 variants.
- G6PD deficiency impacts an estimated 400 million individuals worldwide.
- Evidence suggests a selective advantage for female heterozygotes in malaria-endemic regions.
Purpose of the Study:
- To investigate the molecular basis of G6PD deficiency and enzyme polymorphism.
- To understand the genetic underpinnings of G6PD variants.
Main Methods:
- Gene cloning of human G6PD.
- Molecular analysis of enzyme variants.
Main Results:
- The cloning of the G6PD gene facilitates detailed molecular investigation.
- Understanding the genetic variations explains enzyme deficiency and polymorphism.
Conclusions:
- The cloning of the G6PD gene is crucial for elucidating the molecular basis of its deficiency and polymorphism.
- Genetic studies are essential for understanding the prevalence and impact of G6PD variants.
Abstract:
With more than 300 different variants reported, the human enzyme glucose-6-phosphate dehydrogenase (G6PD; EC 1.1.1.49) is one of the most polymorphic proteins known. An estimated 400 million people throughout the world are deficient in G6PD; numerous lines of evidence indicate that this is because female heterozygotes have a selective advantage in malaria infections. The cloning of the G6PD gene has made it possible to clarify the molecular basis underlying this enzyme deficiency and polymorphism.