9-132905878-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_000368.5(TSC1):​c.1700C>A​(p.Ala567Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A567V) has been classified as Benign.

Frequency

Genomes: not found (cov: 32)

Consequence

TSC1
NM_000368.5 missense

Scores

9
10

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.18
Variant links:
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 Uncertain_significance. Variant got 1 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.4116575).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
TSC1NM_000368.5 linkc.1700C>A p.Ala567Glu missense_variant Exon 15 of 23 ENST00000298552.9 NP_000359.1 Q92574-1Q86WV8X5D9D2

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
TSC1ENST00000298552.9 linkc.1700C>A p.Ala567Glu missense_variant Exon 15 of 23 1 NM_000368.5 ENSP00000298552.3 Q92574-1
TSC1ENST00000490179.4 linkc.1700C>A p.Ala567Glu missense_variant Exon 16 of 24 3 ENSP00000495533.2 A0A2R8Y6S8

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD4 exome
Cov.:
31
GnomAD4 genome
Cov.:
32

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1
Feb 07, 2022
Ambry Genetics
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

The p.A567E variant (also known as c.1700C>A), located in coding exon 13 of the TSC1 gene, results from a C to A substitution at nucleotide position 1700. The alanine at codon 567 is replaced by glutamic acid, an amino acid with dissimilar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.14
BayesDel_addAF
Uncertain
0.099
D
BayesDel_noAF
Benign
-0.10
CADD
Benign
18
DANN
Uncertain
0.98
DEOGEN2
Uncertain
0.43
T;.;T;.;.;T;.;T;.;.;.
Eigen
Benign
0.13
Eigen_PC
Benign
0.12
FATHMM_MKL
Uncertain
0.90
D
LIST_S2
Uncertain
0.88
.;D;D;D;D;.;.;.;D;D;.
M_CAP
Uncertain
0.22
D
MetaRNN
Benign
0.41
T;T;T;T;T;T;T;T;T;T;T
MetaSVM
Uncertain
-0.072
T
MutationAssessor
Uncertain
2.1
M;.;M;.;.;M;.;M;.;.;.
PrimateAI
Benign
0.29
T
PROVEAN
Benign
-0.80
N;N;N;.;.;.;.;.;.;.;.
REVEL
Uncertain
0.46
Sift
Benign
0.034
D;D;D;.;.;.;.;.;.;.;.
Sift4G
Benign
0.20
T;T;T;.;.;.;.;.;.;.;.
Polyphen
0.87
P;.;P;.;.;P;.;P;.;.;.
Vest4
0.60
MutPred
0.58
Loss of catalytic residue at A567 (P = 0.0591);.;Loss of catalytic residue at A567 (P = 0.0591);.;.;Loss of catalytic residue at A567 (P = 0.0591);.;Loss of catalytic residue at A567 (P = 0.0591);.;Loss of catalytic residue at A567 (P = 0.0591);.;
MVP
0.79
MPC
1.3
ClinPred
0.57
D
GERP RS
4.0
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.7
Varity_R
0.16
gMVP
0.37

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.0
Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr9-135781265; API