VCV001766125.6 - ClinVar

NM_001379200.1(TBX1):c.1301A>G (p.His434Arg)

Germline

Classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

(3)

Stars represent the aggregate review status, or the level of review supporting the aggregate germline classification for this VCV record. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status. The number of submissions which contribute to this review status is shown in parentheses.

Uncertain significance

criteria provided, multiple submitters, no conflicts

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_001379200.1(TBX1):c.1301A>G (p.His434Arg)

Variation ID: 1766125 Accession: VCV001766125.6

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 22q11.21 22: 19766653 (GRCh38) [ NCBI UCSC ] 22: 19754176 (GRCh37) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	Nov 29, 2022	May 1, 2024	Oct 24, 2023

HGVS

Nucleotide	Protein	Molecular consequence
NM_001379200.1:c.1301A>G MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_001366129.1:p.His434Arg	missense
NM_005992.1:c.1009+651A>G		intron variant
NM_080646.2:c.1009+651A>G		intron variant
NM_080647.1:c.1274A>G	NP_542378.1:p.His425Arg	missense
NC_000022.11:g.19766653A>G
NC_000022.10:g.19754176A>G
NG_009229.1:g.14951A>G
LRG_226:g.14951A>G
LRG_226t1:c.1274A>G	LRG_226p1:p.His425Arg

... more HGVS ... less HGVS

Protein change

H425R, H434R

Other names

Canonical SPDI

NC_000022.11:19766652:A:G

Functional consequence Help The effect of the variant on RNA or protein function, based on experimental evidence from submitters.

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

Allele frequency Help The frequency of the allele represented by this VCV record.

Links

VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
TBX1		Little evidence for dosage pathogenicity	No evidence available	GRCh38 GRCh37	968	1360

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
Cardiovascular phenotype	Uncertain significance (1)	criteria provided, single submitter	Sep 30, 2021	RCV002378930.2
DiGeorge syndrome	Uncertain significance (1)	criteria provided, single submitter	Oct 24, 2023	RCV003103568.4
not provided	Uncertain significance (1)	criteria provided, single submitter	Oct 24, 2022	RCV003223757.1

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	More information Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Uncertain significance (Oct 24, 2022)	criteria provided, single submitter (GeneDx Variant Classification Process June 2021) Method: clinical testing	Not Provided Affected status: yes Allele origin: germline	GeneDx Accession: SCV003919377.1 First in ClinVar: Apr 30, 2023 Last updated: Apr 30, 2023	Comment: In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge
Uncertain significance (Oct 24, 2023)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	DiGeorge syndrome Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV003286693.2 First in ClinVar: Feb 07, 2023 Last updated: Feb 14, 2024	Comment: This sequence change replaces histidine, which is basic and polar, with arginine, which is basic and polar, at codon 425 of the TBX1 protein (p.His425Arg). … (more) This sequence change replaces histidine, which is basic and polar, with arginine, which is basic and polar, at codon 425 of the TBX1 protein (p.His425Arg). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with TBX1-related conditions. ClinVar contains an entry for this variant (Variation ID: 1766125). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. (less)
Uncertain significance (Sep 30, 2021)	criteria provided, single submitter (Ambry Variant Classification Scheme 2023) Method: clinical testing	Cardiovascular phenotype Affected status: unknown Allele origin: germline	Ambry Genetics Accession: SCV002685773.2 First in ClinVar: Nov 29, 2022 Last updated: May 01, 2024	Comment: The p.H425R variant (also known as c.1274A>G), located in coding exon 8 of the TBX1 gene, results from an A to G substitution at nucleotide … (more) The p.H425R variant (also known as c.1274A>G), located in coding exon 8 of the TBX1 gene, results from an A to G substitution at nucleotide position 1274. The histidine at codon 425 is replaced by arginine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. (less)

Comment:

This sequence change replaces histidine, which is basic and polar, with arginine, which is basic and polar, at codon 425 of the TBX1 protein (p.His425Arg). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with TBX1-related conditions. ClinVar contains an entry for this variant (Variation ID: 1766125). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

Comment:

The p.H425R variant (also known as c.1274A>G), located in coding exon 8 of the TBX1 gene, results from an A to G substitution at nucleotide position 1274. The histidine at codon 425 is replaced by arginine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

Germline Functional Evidence

There is no functional evidence in ClinVar for this variation. If you have generated functional data for this variation, please consider submitting that data to ClinVar.

Comment:

Citations for germline classification of this variant

There are no citations for germline classification of this variant in ClinVar. If you know of citations for this variation, please consider submitting that information to ClinVar.

Text-mined citations for this variant ...

Record last updated Sep 29, 2024

ClinVar Genomic variation as it relates to human health

NM_001379200.1(TBX1):c.1301A>G (p.His434Arg)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...