A novel point mutation in the steroid sulfatase gene in X-linked ichthyosis. 1997

E Morita, and O Katoh, and S Shinoda, and T Hiragun, and T Tanaka, and Y Kameyoshi, and S Yamamoto
Department of Dermatology, Hiroshima University School of Medicine, Minami-ku, Japan.

We analyzed the steroid sulfatase (STS) gene in nine Japanese patients with X-linked ichthyosis (XLI) by a polymerase chain reaction technique and subsequent DNA sequencing. Eight of nine patients showed complete deletion of the STS gene. In a patient of XLI exhibiting a normal amplifying pattern with predicted sizes of the STS gene, a novel mutation was found resulting in the appearance of a stop codon in exon 7 of the STS gene. This suggests that exon 7 or an area in its downstream region is important for STS activity.

UI MeSH Term Description Entries
D007564 Japan A country in eastern Asia, island chain between the North Pacific Ocean and the Sea of Japan, east of the Korean Peninsula. The capital is Tokyo. Bonin Islands
D004796 Clinical Enzyme Tests Analyses for a specific enzyme activity, or of the level of a specific enzyme that is used to assess health and disease risk, for early detection of disease or disease prediction, diagnosis, and change in disease status. Enzyme Tests, Clinical,Clinical Enzyme Test,Enzyme Test, Clinical,Test, Clinical Enzyme,Tests, Clinical Enzyme
D005091 Exons The parts of a transcript of a split GENE remaining after the INTRONS are removed. They are spliced together to become a MESSENGER RNA or other functional RNA. Mini-Exon,Exon,Mini Exon,Mini-Exons
D005784 Gene Amplification A selective increase in the number of copies of a gene coding for a specific protein without a proportional increase in other genes. It occurs naturally via the excision of a copy of the repeating sequence from the chromosome and its extrachromosomal replication in a plasmid, or via the production of an RNA transcript of the entire repeating sequence of ribosomal RNA followed by the reverse transcription of the molecule to produce an additional copy of the original DNA sequence. Laboratory techniques have been introduced for inducing disproportional replication by unequal crossing over, uptake of DNA from lysed cells, or generation of extrachromosomal sequences from rolling circle replication. Amplification, Gene
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001192 Arylsulfatases Enzymes that catalyze the hydrolysis of a phenol sulfate to yield a phenol and sulfate. Arylsulfatase A, B, and C have been separated. A deficiency of arylsulfatases is one of the causes of metachromatic leukodystrophy (LEUKODYSTROPHY, METACHROMATIC). EC 3.1.6.1. Arylsulfatase,Arylsulfate Sulfohydrolase,Arylsulfate Sulfohydrolases,Arylsulphatase,Arylsulphatases,Pseudo Arylsulfatase A,Sulfohydrolase, Arylsulfate
D016114 Ichthyosis, X-Linked Chronic form of ichthyosis that is inherited as a sex-linked recessive trait carried on the X-chromosome and transmitted to the male offspring. It is characterized by severe scaling, especially on the extremities, and is associated with steroid sulfatase deficiency. Ichthyosis, Sex-Linked,Steroid Sulfatase Deficiency Disease,Placental Steroid Sulfatase Deficiency,Steroid Sulfatase Deficiency,Deficiencies, Steroid Sulfatase,Deficiency, Steroid Sulfatase,Ichthyoses, Sex-Linked,Ichthyoses, X-Linked,Ichthyosis, Sex Linked,Ichthyosis, X Linked,Steroid Sulfatase Deficiencies,Sulfatase Deficiencies, Steroid,Sulfatase Deficiency, Steroid
D017354 Point Mutation A mutation caused by the substitution of one nucleotide for another. This results in the DNA molecule having a change in a single base pair. Mutation, Point,Mutations, Point,Point Mutations
D043266 Steryl-Sulfatase An arylsulfatase with high specificity towards sulfated steroids. Defects in this enzyme are the cause of ICHTHYOSIS, X-LINKED. 3 Beta-Hydroxysteroid Sulfate Sulfatase,Arylsulfatase C,Arylsulphatase C,Cholesterol Sulfatase,Cholesterol Sulfate Sulfatase,DHEA Sulfatase,Dehydroepiandrosterone Sulfate Sulfatase,Estrone Sulfate Sulfatase,Estrone Sulfate Sulfohydrolase,Steroid Sulfatase,Steroid Sulfohydrolase,Steroid Sulphatase,Sterol Sulfatase,Sterylsulfatase,3 Beta Hydroxysteroid Sulfate Sulfatase,Steryl Sulfatase,Sulfatase, Cholesterol,Sulfatase, Cholesterol Sulfate,Sulfatase, DHEA,Sulfatase, Dehydroepiandrosterone Sulfate,Sulfatase, Estrone Sulfate,Sulfatase, Steroid,Sulfatase, Sterol,Sulfate Sulfatase, Cholesterol,Sulfate Sulfatase, Dehydroepiandrosterone,Sulfate Sulfatase, Estrone,Sulfate Sulfohydrolase, Estrone,Sulfohydrolase, Estrone Sulfate,Sulfohydrolase, Steroid,Sulphatase, Steroid

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