16-2071855-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_ModerateBP6_Very_StrongBS2

The NM_000548.5(TSC2):c.2018C>T(p.Ala673Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000672 in 1,414,568 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000067 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

TSC2
NM_000548.5 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 0.691

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 -14 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.068710655).

BP6

Variant 16-2071855-C-T is Benign according to our data. Variant chr16-2071855-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 207665.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-2071855-C-T is described in Lovd as [Likely_benign].

BS2

High AC in GnomAdExome4 at 95 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TSC2	NM_000548.5 link	c.2018C>T	p.Ala673Val	missense_variant	Exon 19 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.2018C>T	p.Ala673Val	missense_variant	Exon 19 of 42	5	NM_000548.5	ENSP00000219476.3		P49815-1

Frequencies

GnomAD3 genomes

AF:

0.00

AC:

AN:

151704

Hom.:

Cov.:

FAILED QC

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000368

AC:

AN:

162940

Hom.:

AF XY:

0.0000335

AC XY:

AN XY:

89468

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000109

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000473

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000672

AC:

AN:

1414568

Hom.:

Cov.:

AF XY:

0.0000543

AC XY:

AN XY:

699994

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000767

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000270

Gnomad4 SAS exome

AF:

0.0000871

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000734

Gnomad4 OTH exome

AF:

0.0000342

GnomAD4 genome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000659

AC:

AN:

151704

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74094

show subpopulations

Gnomad4 AFR

AF:

0.0000242

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000301

Hom.:

Bravo

AF:

0.0000189

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.0000344

AC:

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Tuberous sclerosis 2

Benign:2

Nov 07, 2021

Genome-Nilou Lab

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 29, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:1

Jan 06, 2021

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary cancer-predisposing syndrome

Benign:1

Aug 02, 2018

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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

AlphaMissense

Benign

0.065

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.24

CADD

Benign

0.21

DANN

Benign

0.28

DEOGEN2

Uncertain

0.45

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

Eigen

Benign

-0.99

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.32

LIST_S2

Benign

0.84

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

M_CAP

Uncertain

0.098

MetaRNN

Benign

0.069

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

MetaSVM

Benign

-0.74

MutationAssessor

Benign

0.76

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

PrimateAI

Benign

0.38

PROVEAN

Benign

-0.98

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

REVEL

Uncertain

0.35

Sift

Benign

0.33

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

Sift4G

Benign

0.84

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

Polyphen

0.0040

B;.;.;.;B;B;.;.;B;B;.;.;.;.;.

Vest4

0.21

MutPred

0.44

Loss of glycosylation at P674 (P = 0.0644);Loss of glycosylation at P674 (P = 0.0644);Loss of glycosylation at P674 (P = 0.0644);.;Loss of glycosylation at P674 (P = 0.0644);Loss of glycosylation at P674 (P = 0.0644);Loss of glycosylation at P674 (P = 0.0644);Loss of glycosylation at P674 (P = 0.0644);.;Loss of glycosylation at P674 (P = 0.0644);Loss of glycosylation at P674 (P = 0.0644);Loss of glycosylation at P674 (P = 0.0644);Loss of glycosylation at P674 (P = 0.0644);Loss of glycosylation at P674 (P = 0.0644);.;

MVP

0.87

ClinPred

0.039

GERP RS

1.3

Varity_R

0.023

gMVP

0.31

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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