22-19763274-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BS1BS2

The NM_001379200.1(TBX1):c.471C>T(p.Phe157Phe) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00423 in 1,614,176 control chromosomes in the GnomAD database, including 19 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0030 ( 1 hom., cov: 33)

Exomes 𝑓: 0.0044 ( 18 hom. )

Consequence

TBX1
NM_001379200.1 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -1.49

Variant links:

Genes affected

TBX1 (HGNC:11592): (T-box transcription factor 1) This gene is a member of a phylogenetically conserved family of genes that share a common DNA-binding domain, the T-box. T-box genes encode transcription factors involved in the regulation of developmental processes. This gene product shares 98% amino acid sequence identity with the mouse ortholog. DiGeorge syndrome (DGS)/velocardiofacial syndrome (VCFS), a common congenital disorder characterized by neural-crest-related developmental defects, has been associated with deletions of chromosome 22q11.2, where this gene has been mapped. Studies using mouse models of DiGeorge syndrome suggest a major role for this gene in the molecular etiology of DGS/VCFS. Several alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jul 2008]

TBX1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.41).

BP6

Variant 22-19763274-C-T is Benign according to our data. Variant chr22-19763274-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 455792.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr22-19763274-C-T is described in Lovd as [Likely_benign].

BP7

Synonymous conserved (PhyloP=-1.49 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00297 (453/152358) while in subpopulation NFE AF= 0.00537 (365/68032). AF 95% confidence interval is 0.00491. There are 1 homozygotes in gnomad4. There are 205 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High AC in GnomAd4 at 453 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TBX1	NM_001379200.1 link	c.471C>T	p.Phe157Phe	synonymous_variant	Exon 2 of 7	ENST00000649276.2	NP_001366129.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TBX1	ENST00000649276.2 link	c.471C>T	p.Phe157Phe	synonymous_variant	Exon 2 of 7		NM_001379200.1	ENSP00000497003.1		A0A3B3IS18

Frequencies

GnomAD3 genomes

AF:

0.00298

AC:

453

AN:

152240

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000868

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000916

Gnomad ASJ

AF:

0.00403

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00160

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00536

Gnomad OTH

AF:

0.00239

GnomAD3 exomes

AF:

0.00277

AC:

696

AN:

251386

Hom.:

AF XY:

0.00290

AC XY:

394

AN XY:

135896

show subpopulations

Gnomad AFR exome

AF:

0.000985

Gnomad AMR exome

AF:

0.000983

Gnomad ASJ exome

AF:

0.00298

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000359

Gnomad FIN exome

AF:

0.00129

Gnomad NFE exome

AF:

0.00496

Gnomad OTH exome

AF:

0.00212

GnomAD4 exome

AF:

0.00437

AC:

6381

AN:

1461818

Hom.:

Cov.:

AF XY:

0.00421

AC XY:

3065

AN XY:

727210

show subpopulations

Gnomad4 AFR exome

AF:

0.000657

Gnomad4 AMR exome

AF:

0.00127

Gnomad4 ASJ exome

AF:

0.00371

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000359

Gnomad4 FIN exome

AF:

0.00176

Gnomad4 NFE exome

AF:

0.00525

Gnomad4 OTH exome

AF:

0.00392

GnomAD4 genome

AF:

0.00297

AC:

453

AN:

152358

Hom.:

Cov.:

AF XY:

0.00275

AC XY:

205

AN XY:

74506

show subpopulations

Gnomad4 AFR

AF:

0.000866

Gnomad4 AMR

AF:

0.000915

Gnomad4 ASJ

AF:

0.00403

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00160

Gnomad4 NFE

AF:

0.00537

Gnomad4 OTH

AF:

0.00237

Alfa

AF:

0.00431

Hom.:

Bravo

AF:

0.00281

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.00393

EpiControl

AF:

0.00367

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Dec 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

TBX1: BP4, BP7, BS2 -

Jan 14, 2019

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Benign:1

Mar 31, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

DiGeorge syndrome

Benign:1

Feb 02, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiovascular phenotype

Benign:1

Jun 29, 2015

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

BayesDel_noAF

Benign

-0.41

CADD

Benign

DANN

Benign

0.95

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

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