NM_005359.6(SMAD4):c.820G>A (p.Ala274Thr) AND multiple conditions

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Dec 16, 2021
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV002445190.2

Allele description [Variation Report for NM_005359.6(SMAD4):c.820G>A (p.Ala274Thr)]

NM_005359.6(SMAD4):c.820G>A (p.Ala274Thr)

Gene:

SMAD4:SMAD family member 4 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

18q21.2

Genomic location:

Preferred name:

NM_005359.6(SMAD4):c.820G>A (p.Ala274Thr)

HGVS:

NC_000018.10:g.51058372G>A
NG_013013.2:g.95333G>A
NM_005359.6:c.820G>AMANE SELECT
NP_005350.1:p.Ala274Thr
LRG_318t1:c.820G>A
LRG_318:g.95333G>A
NC_000018.9:g.48584742G>A
NM_005359.5:c.820G>A

Protein change:

A274T

Links:

dbSNP: rs751860447

NCBI 1000 Genomes Browser:

rs751860447

Molecular consequence:

NM_005359.6:c.820G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Familial thoracic aortic aneurysm and aortic dissection (TAAD)
Synonyms:: Thoracic aortic aneurysm and aortic dissection; Thoracic aortic aneurysms and dissections
Identifiers:: MONDO: MONDO:0019625; MedGen: C4707243; Orphanet: 91387; OMIM: PS607086

Name:: Hereditary cancer-predisposing syndrome
Synonyms:: Neoplastic Syndromes, Hereditary; Tumor predisposition; Cancer predisposition; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0015356; MeSH: D009386; MedGen: C0027672

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV001189822	Ambry Genetics	criteria provided, single submitter (Ambry Variant Classification Scheme 2023)	Uncertain significance (Dec 16, 2021)	germline	clinical testing	Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV001189822

Ambry Genetics

criteria provided, single submitter

(Ambry Variant Classification Scheme 2023)

Uncertain significance
(Dec 16, 2021)

germline

clinical testing

Citation Link

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Details of each submission

From Ambry Genetics, SCV001189822.4

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

Description

The p.A274T variant (also known as c.820G>A), located in coding exon 6 of the SMAD4 gene, results from a G to A substitution at nucleotide position 820. The alanine at codon 274 is replaced by threonine, an amino acid with similar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Jun 9, 2024

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