Polymorphism of 5′ of the catalase gene in Hungarian acatalasemia and hypocatalasemia

The amplified fragment length polymorphism of Hinfl on the promoter region of the catalase gene in Hungarian acatalasemic and hypocatalasemic patients yielded three different patterns with five bands in total. The sequence analyses revealed A‐to‐T, C‐to‐A, and C‐to‐T mutations at positions −21, −20, and −18 upstream of the translational initiation site. The −21 A‐to‐T mutations were more frequent in acatalasemic and hypocatalasemic patients (36/2) than in controls (18/14). This mutation had been detected in Japanese acatalasemic patients while the other two are novel mutations. Two extra bands in the Hinfl pattern are due to star‐like activity that cleaved a G/ATTT sequence at position −4 to 0 upstream of the initiation site.