rs74315303
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_000396.4(CTSK):c.721C>T(p.Arg241Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000062 in 1,614,012 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. R241R) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.
Frequency
Consequence
NM_000396.4 stop_gained
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 18 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CTSK | NM_000396.4 | c.721C>T | p.Arg241Ter | stop_gained | 6/8 | ENST00000271651.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CTSK | ENST00000271651.8 | c.721C>T | p.Arg241Ter | stop_gained | 6/8 | 1 | NM_000396.4 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.0000394 AC: 6AN: 152136Hom.: 0 Cov.: 31
GnomAD3 exomes AF: 0.0000676 AC: 17AN: 251476Hom.: 0 AF XY: 0.0000589 AC XY: 8AN XY: 135916
GnomAD4 exome AF: 0.0000643 AC: 94AN: 1461876Hom.: 0 Cov.: 32 AF XY: 0.0000701 AC XY: 51AN XY: 727242
GnomAD4 genome ? AF: 0.0000394 AC: 6AN: 152136Hom.: 0 Cov.: 31 AF XY: 0.0000404 AC XY: 3AN XY: 74318
ClinVar
Submissions by phenotype
Pyknodysostosis Pathogenic:7
Pathogenic, no assertion criteria provided | clinical testing | Natera, Inc. | Sep 16, 2020 | - - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Apr 11, 2023 | - - |
Pathogenic, no assertion criteria provided | literature only | OMIM | Nov 01, 1996 | - - |
Likely pathogenic, criteria provided, single submitter | literature only | Counsyl | Dec 02, 2014 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Baylor Genetics | Oct 14, 2023 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Neuberg Centre For Genomic Medicine, NCGM | - | The stop gained p.R241* in CTSK (NM_000396.4) has been observed in individuals affected with pycnodysostosis, and has been shown to segregate with disease in a family (B D Gelb et al; M R Johnson). It is expected to result in an absent or disrupted protein product. The variant has been reported to ClinVar as Pathogenic/Likely Pathogenic. This variant is predicted to cause loss of normal protein function through protein truncation. For these reasons, this variant has been classified as Pathogenic. - |
Pathogenic, criteria provided, single submitter | clinical testing | Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein | Aug 12, 2022 | ACMG classification criteria: PVS1 very strong, PS4 strong, PM2 supporting, PM3 very strong, PP1 strong - |
not provided Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Dec 30, 2023 | This sequence change creates a premature translational stop signal (p.Arg241*) in the CTSK gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in CTSK are known to be pathogenic (PMID: 12125807, 21569238). This variant is present in population databases (rs74315303, gnomAD 0.01%). This premature translational stop signal has been observed in individuals with pycnodysostosis (PMID: 8703060, 8938428). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 8422). For these reasons, this variant has been classified as Pathogenic. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at