G6PD deficiency: the genotype-phenotype association.

Area of Science:

• Genetics
• Biochemistry
• Hematology

Background:

• Glucose-6-phosphate dehydrogenase (G6PD) deficiency is a prevalent X-linked genetic disorder.
• Certain G6PD variants are common globally due to their protective effect against malaria.
• Most individuals with G6PD deficiency are asymptomatic, but some are susceptible to health issues.

Purpose of the Study:

• To review the molecular basis and clinical manifestations of glucose-6-phosphate dehydrogenase deficiency.
• To understand the impact of various G6PD mutations on enzyme stability and function.

Main Methods:

• Literature review of G6PD variants and mutations.
• Analysis of described mutations affecting enzyme stability and structure.
• Correlation of mutation types with clinical phenotypes.

Main Results:

• Over 160 G6PD mutations have been identified, with many affecting enzyme stability.
• Polymorphic mutations impact amino acid residues, potentially disrupting protein folding.
• Severe mutations often affect critical enzyme interfaces or NADP binding sites.

Conclusions:

• G6PD deficiency is a complex genetic disorder with diverse mutations.
• Enzyme instability is a primary mechanism for G6PD deficiency.
• Understanding mutation-specific effects is crucial for managing G6PD-related hemolytic anemia.