X-38403685-C-T
Variant summary
Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM2PM5PP3_StrongPP5
The NM_000531.6(OTC):c.608C>T(p.Ser203Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S203C) has been classified as Likely pathogenic.
Frequency
Consequence
NM_000531.6 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_pathogenic. Variant got 9 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
OTC | NM_000531.6 | c.608C>T | p.Ser203Phe | missense_variant | 6/10 | ENST00000039007.5 | NP_000522.3 | |
OTC | NM_001407092.1 | c.608C>T | p.Ser203Phe | missense_variant | 8/12 | NP_001394021.1 | ||
OTC | XM_017029556.2 | c.608C>T | p.Ser203Phe | missense_variant | 6/9 | XP_016885045.1 |
Ensembl
Frequencies
GnomAD3 genomes Cov.: 23
GnomAD4 exome Cov.: 30
GnomAD4 genome Cov.: 23
ClinVar
Submissions by phenotype
Ornithine carbamoyltransferase deficiency Pathogenic:2Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Nov 07, 2021 | - - |
Pathogenic, no assertion criteria provided | clinical testing | Molecular Genetics laboratory, Necker Hospital | - | 1 boy with a neonatal form - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Rady Children's Institute for Genomic Medicine, Rady Children's Hospital San Diego | Sep 07, 2020 | This variant has not been previously reported or functionally characterized in the literature to our knowledge. However, a different variant affecting the same amino acid residue, c.608C>G (p.Ser203Cys), has been previously reported in an individual with Ornithine Transcarbamylase (OTC) Deficiency (PMID: 8019569). It is absent from the gnomAD population database and thus is presumed to be rare. The c.608C>T (p.Ser203Phe) variant affects a highly conserved amino acid and is predicted by multiple in silico tools to have a deleterious effect on protein function. Analysis of the parental samples was negative for the variant, indicating this variant likely occurred as a de novo event. Based on the available evidence, the c.608C>T (p.Ser203Phe) variant is classified as Likely Pathogenic. - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Nov 16, 2016 | Variant summary: The OTC c.608C>T (p.Ser203Phe) variant involves the alteration of a conserved nucleotide. 5/5 in silico tools predict a damaging outcome for this variant. This variant is absent in 87525 control chromosomes and has not, to our knowledge, been reported in affected individuals via publications and/or reputable databases/clinical diagnostic laboratories; nor evaluated for functional impact by in vivo/vitro studies. Because of the absence of clinical information and the lack of functional studies, the variant is classified as a variant of uncertain significance (VUS) until additional information becomes available. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at