rs397514783
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_000368.5(TSC1):c.2272C>T(p.Gln758Ter) variant causes a stop gained 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 Pathogenic (★★). Variant results in nonsense mediated mRNA decay.
Frequency
Genomes: not found (cov: 32)
Consequence
TSC1
NM_000368.5 stop_gained
NM_000368.5 stop_gained
Scores
5
1
1
Clinical Significance
Conservation
PhyloP100: 9.48
Genes affected
TSC1 (HGNC:12362): (TSC complex subunit 1) This gene is a tumor suppressor gene that encodes the growth inhibitory protein hamartin. The encoded protein interacts with and stabilizes the GTPase activating protein tuberin. This hamartin-tuberin complex negatively regulates mammalian target of rapamycin complex 1 (mTORC1) signaling which is a major regulator of anabolic cell growth. This protein also functions as a co-chaperone for Hsp90 that inhibits its ATPase activity. This protein functions as a facilitator of Hsp90-mediated folding of kinase and non-kinase clients, including TSC2 and thereby preventing their ubiquitination and proteasomal degradation. Mutations in this gene have been associated with tuberous sclerosis and lymphangioleiomyomatosis. [provided by RefSeq, May 2022]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 18 ACMG points.
PVS1
?
Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
PM2
?
Very rare variant in population databases, with high coverage;
PP5
?
Variant 9-132902724-G-A is Pathogenic according to our data. Variant chr9-132902724-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 64712.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr9-132902724-G-A is described in Lovd as [Pathogenic]. Variant chr9-132902724-G-A is described in Lovd as [Pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TSC1 | NM_000368.5 | c.2272C>T | p.Gln758Ter | stop_gained | 18/23 | ENST00000298552.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TSC1 | ENST00000298552.9 | c.2272C>T | p.Gln758Ter | stop_gained | 18/23 | 1 | NM_000368.5 | P4 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 31
GnomAD4 exome
Cov.:
31
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:3Other:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Tuberous sclerosis 1 Pathogenic:2
Pathogenic, criteria provided, single submitter | clinical testing | Genome-Nilou Lab | Nov 07, 2021 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Oct 19, 2023 | This sequence change creates a premature translational stop signal (p.Gln758*) in the TSC1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in TSC1 are known to be pathogenic (PMID: 10227394, 17304050). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individuals with tuberous sclerosis complex (PMID: 28087349). ClinVar contains an entry for this variant (Variation ID: 64712). For these reasons, this variant has been classified as Pathogenic. - |
Tuberous sclerosis syndrome Other:2
not provided, no classification provided | curation | Tuberous sclerosis database (TSC1) | - | - - |
not provided, no classification provided | curation | Tuberous sclerosis database (TSC1) | - | - - |
not provided Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Jan 06, 2017 | The Q758X nonsense variant in the TSC1 gene has been reported previously in a patient with a clinical diagnosis of TSC (external variant database). This variant is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. Therefore, the presence of Q758X is consistent with a diagnosis of TSC. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
Cadd
Pathogenic
Dann
Uncertain
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
MutationTaster
Benign
A;A;A;D
Vest4
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at