rs373818076

Positions:

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 4P and 16B. PM1PM5BP4_StrongBP6_Very_StrongBS2

The NM_000548.5(TSC2):c.814G>A(p.Ala272Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000902 in 1,551,706 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A272S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000098 ( 1 hom., cov: 32)

Exomes 𝑓: 0.000089 ( 0 hom. )

Consequence

TSC2
NM_000548.5 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: 7.53

Variant links:

Genes affected

TSC2 (HGNC:12363): (TSC complex subunit 2) This gene is a tumor suppressor gene that encodes the growth inhibitory protein tuberin. Tuberin interacts with hamartin to form the TSC protein complex which functions in the control of cell growth. This TSC protein complex negatively regulates mammalian target of rapamycin complex 1 (mTORC1) signaling which is a major regulator of anabolic cell growth. Mutations in this gene have been associated with tuberous sclerosis and lymphangioleiomyomatosis. [provided by RefSeq, May 2022]

TSC2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

PM1

In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 3 benign, 16 uncertain in NM_000548.5

PM5

Other missense variant is known to change same aminoacid residue: Variant chr16-2057145-C-A is described in Lovd as [Pathogenic].

BP4

Computational evidence support a benign effect (MetaRNN=0.043090075).

BP6

Variant 16-2057144-G-A is Benign according to our data. Variant chr16-2057144-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 238093.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-2057144-G-A is described in Lovd as [Benign].

BS2

High AC in GnomAd4 at 15 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TSC2	NM_000548.5 linkuse as main transcript	c.814G>A	p.Ala272Thr	missense_variant	9/42	ENST00000219476.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TSC2	ENST00000219476.9 linkuse as main transcript	c.814G>A	p.Ala272Thr	missense_variant	9/42	5	NM_000548.5		P49815-1

Frequencies

GnomAD3 genomes

AF:

0.0000986

AC:

AN:

152170

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00259

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.000621

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000198

AC:

AN:

156822

Hom.:

AF XY:

0.000206

AC XY:

AN XY:

82554

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000808

Gnomad ASJ exome

AF:

0.00234

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000219

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000494

Gnomad OTH exome

AF:

0.000226

GnomAD4 exome

AF:

0.0000893

AC:

125

AN:

1399418

Hom.:

Cov.:

AF XY:

0.0000869

AC XY:

AN XY:

690226

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000840

Gnomad4 ASJ exome

AF:

0.00294

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000189

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000167

Gnomad4 OTH exome

AF:

0.000259

GnomAD4 genome

AF:

0.0000985

AC:

AN:

152288

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74454

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00259

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.000622

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000165

Hom.:

Bravo

AF:

0.0000680

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000124

AC:

ExAC

AF:

0.0000964

AC:

Asia WGS

AF:

0.00173

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Tuberous sclerosis 2

Benign:2

Benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Nov 07, 2021	- -
Benign, criteria provided, single submitter	clinical testing	Invitae	Jan 31, 2024	- -

Hereditary cancer-predisposing syndrome

Benign:2

Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Aug 14, 2015	This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
Benign, criteria provided, single submitter	curation	Sema4, Sema4	Jun 25, 2020	- -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Dec 28, 2017

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Lymphangiomyomatosis;C1846385:Isolated focal cortical dysplasia type II;C1860707:Tuberous sclerosis 2

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Jul 15, 2021

- -

TSC2-related disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Feb 14, 2023

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.32

BayesDel_addAF

Uncertain

0.038

BayesDel_noAF

Uncertain

0.11

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.38

T;.;.;.;.;.;.;.;.;.;.;.;T;.;T

Eigen

Uncertain

0.47

Eigen_PC

Uncertain

0.44

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.90

D;D;D;D;D;D;D;D;D;D;D;D;D;D;D

M_CAP

Pathogenic

0.35

MetaRNN

Benign

0.043

T;T;T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

-0.058

MutationAssessor

Benign

1.3

L;.;.;.;L;L;.;.;.;L;.;L;.;.;.

MutationTaster

Benign

1.0

D;D;D;D;D;D;D

PrimateAI

Uncertain

0.79

PROVEAN

Benign

-0.79

N;.;.;N;.;N;.;.;N;N;.;.;.;.;N

REVEL

Uncertain

0.56

Sift

Benign

0.19

T;.;.;T;.;T;.;.;T;T;.;.;.;.;T

Sift4G

Uncertain

0.0050

D;.;.;D;.;D;.;.;D;D;.;.;.;.;D

Polyphen

1.0

D;.;.;.;D;D;.;.;D;D;.;.;.;.;.

Vest4

0.80

MVP

0.77

ClinPred

0.073

GERP RS

4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.33

gMVP

0.52

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over