Description:
PHENYLKETONURIA
CYSTATHIONINE GAMMA-LYASE; CTH
CYSTATHIONINURIA
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Repository
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NIGMS Human Genetic Cell Repository
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| Subcollection |
Heritable Diseases |
| Class |
Disorders of Amino Acid Metabolism |
| Quantity |
25 µg |
| Quantitation Method |
Please see our FAQ |
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Biopsy Source
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Peripheral vein
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Cell Type
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B-Lymphocyte
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Tissue Type
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Blood
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Transformant
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Epstein-Barr Virus
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Sample Source
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DNA from LCL
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Race
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White
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Family Member
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1
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Relation to Proband
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proband
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Confirmation
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Molecular characterization after cell line submission to CCR
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Species
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Homo sapiens
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Common Name
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Human
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Remarks
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| IDENTIFICATION OF SPECIES OF ORIGIN |
Species of Origin Confirmed by Nucleoside Phosphorylase Isoenzyme Electrophoresis |
| |
| Gene |
PAH |
| Chromosomal Location |
12q24.1 |
| Allelic Variant 1 |
R252Q; PHENYLKETONURIA |
| Identified Mutation |
ARG252GLN |
| |
| Gene |
CTH |
| Chromosomal Location |
1p31.1 |
| Allelic Variant 1 |
607657.0003; CYSTATHIONINURIA |
| Identified Mutation |
THR67ILE |
| |
| Gene |
CTH |
| Chromosomal Location |
1p31.1 |
| Allelic Variant 2 |
607657.0003; CYSTATHIONINURIA |
| Identified Mutation |
THR67ILE |
| |
| Gene |
PAH |
| Chromosomal Location |
12q24.1 |
| Allelic Variant 2 |
261600.0001; PHENYLKETONURIA |
| Identified Mutation |
IVS12DS, G>A, +1 (c.1315+1 G>A); The first PKU mutation identified in the PAH gene was a single base change (GT-to-AT) in the canonical 5-prime splice donor site of intron 12 (DiLella et al., 1986). Direct hybridization analysis using specific oligonucleotide probes demonstrated tight association with a specific RFLP haplotype called haplotype 3. The splicing mutation was the most prevalent PKU allele among Caucasians. Marvit et al. (1987) found that the GT-to-AT substitution at the 5-prime splice donor site of intron 12 resulted in the skipping of the preceding exon during RNA splicing. cDNA clones had shown an internal 116-basepair deletion corresponding precisely to exon 12 and leading to the synthesis of the truncated protein lacking the C-terminal 52 amino acids. Gene transfer and expression studies using the mutant PAH cDNA indicated that the deletion abolished PAH activity in the cell as a result of protein instability. The studies of Marvit et al. (1987) indicated that in fact a single nucleotide substitution rather than a deletion was the basis of the abnormal gene product.
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| Remarks |
Also has cystathioninuria; donor subject is a compound heterozygote: one allele has a pathogenic G>A transition at nucleotide 755 in exon 7 of the PAH gene [755G>A] resulting in a substitution of glutamine for arginine at codon 252 [Arg252Gln (R252Q)] and a second allele on exon 12 has a pathogenic splice site mutation at nucleotide 1315, c.1315+1G>A [IVS12+1G>A]; HLA type A28,Aw24,B7,Bw35; donor subject is also homozygous for a C>T transition at nucleotide 356 in exon 2 of the CTH gene (356C>T) resulting in the substitution of isoleucine for threonine at codon 67 [Thr67Ile (T67I)] |
| Veleva D, Ay M, Ovchinnikov DA, Prowse ABJ, Menezes MJ, Nafisinia M, Generation of two lymphoblastoid-derived induced pluripotent stem cell (iPSC) lines from patients with phenylketonuria Stem cell research77:103407 2024 |
| PubMed ID: 38552357 |
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| Wang J, Hegele RA, Genomic basis of cystathioninuria (MIM 219500) revealed by multiple mutations in cystathionine gamma-lyase (CTH). Hum Genet112(4):404-8 2003 |
| PubMed ID: 12574942 |
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