Linked Life Data

1975559

Source:http://linkedlifedata.com/resource/pubmed/id/1975559

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1990-10-10
pubmed:abstractText
Two previously unidentified mutations at the phenylalanine hydroxylase locus were found during a study of the relationship between genotype and phenotype in phenylketonuria and hyperphenylalaninemia. One mutation eliminates the BamHI site in exon 7 and the other eliminates the HindIII site in exon 11 of the phenylalanine hydroxylase gene. They were suspected because of deviating restriction fragment patterns and confirmed by amplification, via the polymerase chain reaction, of exon 7 and exon 11, respectively, followed by digestion with the appropriate restriction enzyme. Direct sequencing of amplified mutant exon 7 revealed a G/C to T/A transversion at the first base of codon 272, substituting a GGA glycine codon for a UGA stop codon. Direct sequencing of amplified mutant exon 11 revealed a deletion of codon 364, a CTT leucine codon. The exon 7 mutation can be expected to result in a truncated protein and the exon 11 mutation in the elimination of an amino acid in the catalytic region of the enzyme. A patient who is a compound heterozygote for these two mutations has classical phenylketonuria. It is concluded that each of the two mutations leads to a profound loss of enzymatic activity. The segregation of these mutations with disease alleles in 4 and 2 families, respectively, supports the hypothesis that multiple mutations at the phenylalanine hydroxylase locus explain the variable phenylalanine tolerance in patients with phenylalanine hydroxylase deficiency.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0340-6717
pubmed:author
pubmed:issnType
Print
pubmed:volume
85
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
300-4
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Two mutations within the coding sequence of the phenylalanine hydroxylase gene.
pubmed:affiliation
Department of Clinical Chemistry, Karolinska Hospital, Stockholm, Sweden.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't