rs199774220

Positions:

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 1P and 14B. PP3BP4_ModerateBP6_Very_StrongBS2

The NM_001077653.2(TBX20):c.931C>T(p.Arg311Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000242 in 1,613,992 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. R311H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00022 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00024 ( 1 hom. )

Consequence

TBX20
NM_001077653.2 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 7.43

Variant links:

Genes affected

TBX20 (HGNC:11598): (T-box transcription factor 20) This gene encodes a T-box family member. The T-box family members share a common DNA binding domain, termed the T-box, and they are transcription factors involved in the regulation of developmental processes. This gene is essential for heart development. Mutations in this gene are associated with diverse cardiac pathologies, including defects in septation, valvulogenesis and cardiomyopathy. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2009]

TBX20 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

PP3

Multiple lines of computational evidence support a deleterious effect 7: AlphaMissense, BayesDel_addAF, BayesDel_noAF, Cadd, Dann, PrimateAI, REVEL [when max_spliceai, FATHMM_MKL, MetaRNN, MutationAssessor, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.23037383).

BP6

Variant 7-35204542-G-A is Benign according to our data. Variant chr7-35204542-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 518384.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr7-35204542-G-A is described in Lovd as [Likely_benign].

BS2

High AC in GnomAd4 at 33 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TBX20	NM_001077653.2 linkuse as main transcript	c.931C>T	p.Arg311Cys	missense_variant	7/8	ENST00000408931.4
TBX20	XM_017012456.2 linkuse as main transcript	c.334C>T	p.Arg112Cys	missense_variant	5/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TBX20	ENST00000408931.4 linkuse as main transcript	c.931C>T	p.Arg311Cys	missense_variant	7/8	1	NM_001077653.2	P1

Frequencies

GnomAD3 genomes

AF:

0.000217

AC:

AN:

152106

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00432

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000118

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000317

AC:

AN:

249470

Hom.:

AF XY:

0.000303

AC XY:

AN XY:

135344

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000203

Gnomad ASJ exome

AF:

0.00437

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000164

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000185

Gnomad OTH exome

AF:

0.000330

GnomAD4 exome

AF:

0.000244

AC:

357

AN:

1461770

Hom.:

Cov.:

AF XY:

0.000263

AC XY:

191

AN XY:

727176

show subpopulations

Gnomad4 AFR exome

AF:

0.000119

Gnomad4 AMR exome

AF:

0.000224

Gnomad4 ASJ exome

AF:

0.00459

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.000186

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000149

Gnomad4 OTH exome

AF:

0.000563

GnomAD4 genome

AF:

0.000217

AC:

AN:

152222

Hom.:

Cov.:

AF XY:

0.000202

AC XY:

AN XY:

74436

show subpopulations

Gnomad4 AFR

AF:

0.000145

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00432

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000324

Hom.:

Bravo

AF:

0.000261

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000242

AC:

ExAC

AF:

0.000232

AC:

EpiCase

AF:

0.000327

EpiControl

AF:

0.000119

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:3

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Sep 01, 2023	TBX20: PP3, BS1 -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	May 28, 2021	Identified in a patient with a cardiac left-sided lesion and in four individuals from an exome cohort not known to have cardiac disease (Li et al., 2017); Reported in ClinVar but additional evidence is not available (ClinVar Variant ID# 518384; Landrum et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 29089047, 28049825, 33585493, 27535533, 19762328, 18834961, 25834824, 26118961, 17668378, 28573431, 28274167, 27510170) -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 30, 2023

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

Pathogenic

0.68

BayesDel_addAF

Pathogenic

0.18

BayesDel_noAF

Pathogenic

0.33

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.73

Eigen

Uncertain

0.66

Eigen_PC

Pathogenic

0.72

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.95

M_CAP

Uncertain

0.13

MetaRNN

Benign

0.23

MetaSVM

Uncertain

0.39

MutationAssessor

Benign

0.55

MutationTaster

Benign

1.0

PrimateAI

Pathogenic

0.90

PROVEAN

Uncertain

-3.6

REVEL

Pathogenic

0.68

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.0070

Polyphen

1.0

Vest4

0.89

MVP

0.84

MPC

1.6

ClinPred

0.15

GERP RS

5.9

Varity_R

0.26

gMVP

0.66

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