chr16-2084437-C-T

Position:

chr16-2084437-C-T

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_000548.5(TSC2):c.4215C>T(p.Ala1405=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00407 in 1,609,408 control chromosomes in the GnomAD database, including 288 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0022 ( 20 hom., cov: 34)

Exomes 𝑓: 0.0043 ( 268 hom. )

Consequence

TSC2
NM_000548.5 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:15O:1

Conservation

PhyloP100: -1.44

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 -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.73).

BP6

Variant 16-2084437-C-T is Benign according to our data. Variant chr16-2084437-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 49503.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-2084437-C-T is described in Lovd as [Benign]. Variant chr16-2084437-C-T is described in Lovd as [Likely_benign].

BP7

Synonymous conserved (PhyloP=-1.44 with no splicing effect.

BA1

GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.0595 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TSC2	NM_000548.5 linkuse as main transcript	c.4215C>T	p.Ala1405=	synonymous_variant	34/42	ENST00000219476.9	NP_000539.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TSC2	ENST00000219476.9 linkuse as main transcript	c.4215C>T	p.Ala1405=	synonymous_variant	34/42	5	NM_000548.5	ENSP00000219476		P49815-1

Frequencies

GnomAD3 genomes

AF:

0.00221

AC:

336

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.0664

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00239

GnomAD3 exomes

AF:

0.00872

AC:

2097

AN:

240584

Hom.:

AF XY:

0.0120

AC XY:

1580

AN XY:

131244

show subpopulations

Gnomad AFR exome

AF:

0.000266

Gnomad AMR exome

AF:

0.000235

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000279

Gnomad SAS exome

AF:

0.0682

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000250

Gnomad OTH exome

AF:

0.00406

GnomAD4 exome

AF:

0.00427

AC:

6221

AN:

1457082

Hom.:

268

Cov.:

AF XY:

0.00634

AC XY:

4591

AN XY:

724654

show subpopulations

Gnomad4 AFR exome

AF:

0.000330

Gnomad4 AMR exome

AF:

0.000180

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000152

Gnomad4 SAS exome

AF:

0.0673

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000136

Gnomad4 OTH exome

AF:

0.00455

GnomAD4 genome

AF:

0.00217

AC:

331

AN:

152326

Hom.:

Cov.:

AF XY:

0.00337

AC XY:

251

AN XY:

74488

show subpopulations

Gnomad4 AFR

AF:

0.000120

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.0654

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00237

Alfa

AF:

0.000542

Hom.:

Bravo

AF:

0.000502

Asia WGS

AF:

0.0280

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:15Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:7

Benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Oct 02, 2013	- -
Likely benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Jan 30, 2013	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. -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jun 22, 2024	- -

Tuberous sclerosis 2

Benign:4

Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Sep 20, 2022	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 01, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Nov 07, 2021	- -
Benign, criteria provided, single submitter	clinical testing	KCCC/NGS Laboratory, Kuwait Cancer Control Center	Jul 07, 2023	- -

Tuberous sclerosis syndrome

Benign:2Other:1

not provided, no classification provided	curation	Tuberous sclerosis database (TSC2)	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Feb 22, 2019	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -
Benign, criteria provided, single submitter	clinical testing	All of Us Research Program, National Institutes of Health	Feb 05, 2024	- -

not provided

Benign:1

Likely benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

- -

Hereditary cancer-predisposing syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 10, 2014

This alteration is classified as likely 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

BayesDel_noAF

Benign

-0.73

CADD

Benign

0.90

DANN

Benign

0.55

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

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