NM_000548.5:c.272C>T

Variant names:

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_000548.5(TSC2):c.272C>T(p.Pro91Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000492 in 1,591,930 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. P91P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00055 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00049 ( 3 hom. )

Consequence

TSC2
NM_000548.5 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:13O:2

Conservation

PhyloP100: 7.67

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 -16 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0091893375).

BP6

Variant 16-2053388-C-T is Benign according to our data. Variant chr16-2053388-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 49225.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-2053388-C-T is described in Lovd as [Likely_benign]. Variant chr16-2053388-C-T is described in Lovd as [Benign]. Variant chr16-2053388-C-T is described in Lovd as [Pathogenic].

BS2

High AC in GnomAd4 at 83 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TSC2	NM_000548.5 link	c.272C>T	p.Pro91Leu	missense_variant	Exon 4 of 42	ENST00000219476.9	NP_000539.2	P49815-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TSC2	ENST00000219476.9 link	c.272C>T	p.Pro91Leu	missense_variant	Exon 4 of 42	5	NM_000548.5	ENSP00000219476.3		P49815-1

Frequencies

GnomAD3 genomes

AF:

0.000545

AC:

AN:

152222

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.0150

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000282

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000353

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000917

AC:

194

AN:

211654

Hom.:

AF XY:

0.000997

AC XY:

114

AN XY:

114356

show subpopulations

Gnomad AFR exome

AF:

0.0000790

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.0157

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000758

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000407

Gnomad OTH exome

AF:

0.00150

GnomAD4 exome

AF:

0.000487

AC:

701

AN:

1439708

Hom.:

Cov.:

AF XY:

0.000541

AC XY:

386

AN XY:

714100

show subpopulations

Gnomad4 AFR exome

AF:

0.0000302

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0144

Gnomad4 EAS exome

AF:

0.0000259

Gnomad4 SAS exome

AF:

0.0000485

Gnomad4 FIN exome

AF:

0.0000197

Gnomad4 NFE exome

AF:

0.000233

Gnomad4 OTH exome

AF:

0.00113

GnomAD4 genome

AF:

0.000545

AC:

AN:

152222

Hom.:

Cov.:

AF XY:

0.000632

AC XY:

AN XY:

74364

show subpopulations

Gnomad4 AFR

AF:

0.0000724

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.0150

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000282

Gnomad4 NFE

AF:

0.000353

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000940

Hom.:

Bravo

AF:

0.000533

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.000229

AC:

ESP6500EA

AF:

0.000932

AC:

ExAC

AF:

0.000492

AC:

Asia WGS

AF:

0.00144

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:13Other:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:4Other:1

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Clinical Genetics, Academic Medical Center

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Dec 07, 2017

Eurofins Ntd Llc (ga)

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Sep 19, 2013

ITMI

Significance: not provided

Review Status: no classification provided

Collection Method: reference population

- -

Oct 30, 2019

Athena Diagnostics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Tuberous sclerosis 2

Benign:4

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 07, 2021

Genome-Nilou Lab

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 07, 2023

KCCC/NGS Laboratory, Kuwait Cancer Control Center

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Sep 09, 2022

Color Diagnostics, LLC DBA Color Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:3

Mar 04, 2019

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is associated with the following publications: (PMID: 22903760, 24728327, 12111193) -

Jan 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

TSC2: BS1 -

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Tuberous sclerosis syndrome

Benign:1Other:1

Tuberous sclerosis database (TSC2)

Significance: not provided

Review Status: no classification provided

Collection Method: curation

- -

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Hereditary cancer-predisposing syndrome

Benign:1

Jul 03, 2014

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.045

BayesDel_noAF

Uncertain

0.040

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.84

D;.;.;.;.;.;.;.;.;.;.;.;T;.;T

Eigen

Uncertain

0.46

Eigen_PC

Uncertain

0.43

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.98

D;D;D;D;D;D;D;D;D;T;D;D;D;D;D

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.0090

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

MetaSVM

Benign

-0.32

MutationAssessor

Benign

2.0

M;.;.;.;M;M;.;.;M;.;.;M;.;.;.

PrimateAI

Uncertain

0.73

PROVEAN

Pathogenic

-5.2

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

REVEL

Uncertain

0.50

Sift

Uncertain

0.026

D;.;.;T;.;T;.;.;T;.;.;.;.;.;T

Sift4G

Uncertain

0.0070

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

Polyphen

1.0

D;.;.;.;.;D;.;.;P;.;.;.;.;.;.

Vest4

0.81

MVP

0.57

ClinPred

0.11

GERP RS

4.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.31

gMVP

0.56

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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