Mutations of P450c21 (steroid 21-hydroxylase) at Cys428, Val281, and Ser268 result in complete, partial, or no loss of enzymatic activity, respectively.

Abstract excerpt

Steroid 21-hydroxylase deficiency is the major cause of congenital adrenal hyperplasia (CAH), a common genetic disease. To define the relationship between gene mutations and enzyme deficiency, we generated missense mutations of the 21-hydroxylase cDNA at three different sites and characterized the mutant proteins after expressing them in cultured mammalian and yeast cells. Among them, Ser268 and Val281 have been...

Topics

• Adrenal Hyperplasia, Congenital
• Amino Acid Sequence
• Animals
• Base Sequence
• Cell Line
• Heme
• Humans
• Kinetics
• Molecular Sequence Data
• Mutagenesis, Site-Directed
• Mutation