NM_000548.5:c.2356C>T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP6BS2

The NM_000548.5(TSC2):c.2356C>T(p.Arg786Cys) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000143 in 1,610,980 control chromosomes in the GnomAD database, including 1 homozygotes. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely pathogenic in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R786H) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000033 ( 1 hom., cov: 33)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

TSC2
NM_000548.5 missense, splice_region

Scores

Splicing: ADA: 0.5776

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:3

Conservation

PhyloP100: 3.19

Publications

6 publications found

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 Gene-Disease associations (from GenCC):

tuberous sclerosis
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
tuberous sclerosis 2
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, G2P, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, Ambry Genetics
lymphangioleiomyomatosis
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
tuberous sclerosis complex
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

TSC2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP6

Variant 16-2074200-C-T is Benign according to our data. Variant chr16-2074200-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 374680.

BS2

High AC in GnomAd4 at 5 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000548.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TSC2	NM_000548.5	MANE Select	c.2356C>T	p.Arg786Cys	missense splice_region	Exon 22 of 42	NP_000539.2	P49815-1
TSC2	NM_001406663.1		c.2356C>T	p.Arg786Cys	missense splice_region	Exon 22 of 42	NP_001393592.1	A0A2R8Y6C9
TSC2	NM_001114382.3		c.2356C>T	p.Arg786Cys	missense splice_region	Exon 22 of 41	NP_001107854.1	P49815-4

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TSC2	ENST00000219476.9	TSL:5 MANE Select	c.2356C>T	p.Arg786Cys	missense splice_region	Exon 22 of 42	ENSP00000219476.3	P49815-1
TSC2	ENST00000350773.9	TSL:1	c.2356C>T	p.Arg786Cys	missense splice_region	Exon 22 of 41	ENSP00000344383.4	P49815-4
TSC2	ENST00000401874.7	TSL:1	c.2356C>T	p.Arg786Cys	missense splice_region	Exon 22 of 40	ENSP00000384468.2	P49815-5

Frequencies

GnomAD3 genomes

AF:

0.0000328

AC:

AN:

152234

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000403

AC:

AN:

248154

AF XY:

0.0000371

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000545

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000720

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000123

AC:

AN:

1458628

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

725690

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33420

American (AMR)

AF:

0.00

AC:

AN:

44710

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39696

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86178

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51954

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4456

European-Non Finnish (NFE)

AF:

0.0000117

AC:

AN:

1111860

Other (OTH)

AF:

0.00

AC:

AN:

60222

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.444

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152352

Hom.:

Cov.:

AF XY:

0.0000671

AC XY:

AN XY:

74520

show subpopulations

African (AFR)

AF:

0.0000240

AC:

AN:

41586

American (AMR)

AF:

0.00

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.000415

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10632

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.542

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000637

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000577

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000178

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Tuberous sclerosis 2 (3)

not provided (2)

Hereditary cancer-predisposing syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.50

BayesDel_addAF

Pathogenic

0.26

BayesDel_noAF

Pathogenic

0.32

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.81

Eigen

Uncertain

0.39

Eigen_PC

Uncertain

0.42

FATHMM_MKL

Uncertain

0.92

LIST_S2

Pathogenic

0.99

M_CAP

Pathogenic

0.56

MetaRNN

Uncertain

0.73

MetaSVM

Uncertain

0.35

MutationAssessor

Benign

2.0

PhyloP100

3.2

PrimateAI

Uncertain

0.62

PROVEAN

Uncertain

-4.3

REVEL

Pathogenic

0.73

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.010

Polyphen

1.0

Vest4

0.93

MutPred

0.64

Loss of disorder (P = 0.032)

MVP

0.95

ClinPred

0.61

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.52

gMVP

0.60

Mutation Taster

=43/57

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.58

dbscSNV1_RF

Benign

0.55

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over