rs118203587
Variant summary
Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1PM2PP3_ModeratePP5_Moderate
The NM_000368.5(TSC1):c.1825G>T(p.Glu609Ter) variant causes a stop gained change. 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 (★). Synonymous variant affecting the same amino acid position (i.e. E609E) has been classified as Likely benign. 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: 5.63
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 14 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;
PP3
?
Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
PP5
?
Variant 9-132905753-C-A is Pathogenic according to our data. Variant chr9-132905753-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 48841.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr9-132905753-C-A is described in Lovd as [Pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TSC1 | NM_000368.5 | c.1825G>T | p.Glu609Ter | stop_gained | 15/23 | ENST00000298552.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TSC1 | ENST00000298552.9 | c.1825G>T | p.Glu609Ter | stop_gained | 15/23 | 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:1Other:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Tuberous sclerosis 1 Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Jan 25, 2023 | For these reasons, this variant has been classified as Pathogenic. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. ClinVar contains an entry for this variant (Variation ID: 48841). This premature translational stop signal has been observed in individual(s) with tuberous sclerosis complex (PMID: 11271387). This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Glu609*) 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). - |
Tuberous sclerosis syndrome Other:1
not provided, no classification provided | curation | Tuberous sclerosis database (TSC1) | - | - - |
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
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_AG_spliceai
Position offset: -3
Find out detailed SpliceAI scores and Pangolin per-transcript scores at