phenylketonurias/proline

Deficiency in 6-pyruvoyl-tetrahydropterin synthase (PTPS) activity is the major cause of tetrahydrobiopterin (BH4)-deficient phenylketonuria. Two single base alterations of PTPS cDNA, a C-to-T transition at nucleotide 259 and a novel A-to-G transition at nucleotide 155 (according to cDNA sequence),

DNA gyrase is the only topoisomerase capable of introducing (-) supercoils into relaxed DNA. The C-terminal domain of the gyrase A subunit (GyrA-CTD) and the presence of a gyrase-specific 'GyrA-box' motif within this domain are essential for this unique (-) supercoiling activity by allowing gyrase

A novel restriction fragment length polymorphism in the phenylalanine hydroxylase (PAH) locus generated by the restriction endonuclease MspI was observed in a German phenylketonuria (PKU) patient. Molecular cloning and DNA sequence analyses revealed that the MspI polymorphism was created by a T to C

Maternal phenylketonuria (MPKU) is known to affect fetal outcome, often being associated with microcephaly and congenital heart defects (CHD) if the maternal diet is not appropriately managed. We hypothesized that other nutrients aside from phenylalanine (Phe) may have significant effects on fetal

A non-radioactive single-strand conformation polymorphism (SSCP) method was used to detect various phenylketonuria (PKU) mutations in Japanese and Chinese patients. Arginine413-to-proline (R413P) mutation in exon 12 of the phenylalanine hydroxylase gene was identified in a Japanese patient by this

Haplotype analysis of the phenylalanine hydroxylase (PAH) gene was performed on 27 chromosomes from a sample of 14 Greek phenylketonuria (PKU) probands and their parents. The majority (94%) of the 17 mutant PAH alleles are on haplotypes 1, 2 and 4, with haplotype 1 being most common. Sixty per cent

By direct sequence analysis of 94 mutant phenylalanine hydroxylase alleles using polymerase chain reaction-based techniques, we identified a C to T transition in exon 7 of the human phenylalanine hydroxylase gene that is associated with RFLP haplotypes 1 and 4. A leucine for proline substitution at

A study of serum amino-acids during a L-phenylalanine loading test was performed in controls, heterozygotes and phenylketonuric patients with and without restricted diet. Abnormalities in plasma-amino acids were found in phenylketonuric patients at time zero with a fall of the level of some