NM_000138.5(FBN1):c.7400A>G (p.Gln2467Arg) AND Familial thoracic aortic aneurysm and aortic dissection

Germline classification:: Uncertain significance (2 submissions)
Last evaluated:: May 1, 2023
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

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:: RCV001177890.7

Allele description [Variation Report for NM_000138.5(FBN1):c.7400A>G (p.Gln2467Arg)]

NM_000138.5(FBN1):c.7400A>G (p.Gln2467Arg)

Gene:

FBN1:fibrillin 1 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

15q21.1

Genomic location:

Preferred name:

NM_000138.5(FBN1):c.7400A>G (p.Gln2467Arg)

HGVS:

NC_000015.10:g.48425422T>C
NG_008805.2:g.225367A>G
NM_000138.5:c.7400A>GMANE SELECT
NP_000129.3:p.Gln2467Arg
NP_000129.3:p.Gln2467Arg
LRG_778t1:c.7400A>G
LRG_778:g.225367A>G
LRG_778p1:p.Gln2467Arg
NC_000015.9:g.48717619T>C
NM_000138.4:c.7400A>G

Protein change:

Q2467R

Links:

dbSNP: rs770839761

NCBI 1000 Genomes Browser:

rs770839761

Molecular consequence:

NM_000138.5:c.7400A>G - 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

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV001342189	Color Diagnostics, LLC DBA Color Health	criteria provided, single submitter (ACMG Guidelines, 2015)	Uncertain significance (May 1, 2023)	germline	clinical testing	PubMed (2) [See all records that cite these PMIDs] 29907982, 25741868
SCV002671231	Ambry Genetics	criteria provided, single submitter (Ambry Variant Classification Scheme 2023)	Uncertain significance (Jan 19, 2018)	germline	clinical testing	PubMed (1) [See all records that cite this PMID] Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV001342189

Color Diagnostics, LLC DBA Color Health

criteria provided, single submitter

(ACMG Guidelines, 2015)

Uncertain significance
(May 1, 2023)

germline

clinical testing

PubMed (2)
[See all records that cite these PMIDs]

SCV002671231

Ambry Genetics

criteria provided, single submitter

(Ambry Variant Classification Scheme 2023)

Uncertain significance
(Jan 19, 2018)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

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

Citations

PubMed

Results of next-generation sequencing gene panel diagnostics including copy-number variation analysis in 810 patients suspected of heritable thoracic aortic disorders.

Overwater E, Marsili L, Baars MJH, Baas AF, van de Beek I, Dulfer E, van Hagen JM, Hilhorst-Hofstee Y, Kempers M, Krapels IP, Menke LA, Verhagen JMA, Yeung KK, Zwijnenburg PJG, Groenink M, van Rijn P, Weiss MM, Voorhoeve E, van Tintelen JP, Houweling AC, Maugeri A.

Hum Mutat. 2018 Sep;39(9):1173-1192. doi: 10.1002/humu.23565. Epub 2018 Jul 12.

PubMed [citation]

PMID:: 29907982
PMCID:: PMC6175145

Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology.

Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, Grody WW, Hegde M, Lyon E, Spector E, Voelkerding K, Rehm HL; ACMG Laboratory Quality Assurance Committee.

Genet Med. 2015 May;17(5):405-24. doi: 10.1038/gim.2015.30. Epub 2015 Mar 5.

PubMed [citation]

PMID:: 25741868
PMCID:: PMC4544753

See all PubMed Citations (3)

Details of each submission

From Color Diagnostics, LLC DBA Color Health, SCV001342189.3

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (2)

Description

This missense variant replaces glutamine with arginine at codon 2467 of the FBN1 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual suspected of having heritable thoracic aortic disorder (PMID: 29907982). This variant has been identified in 6/282758 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.

#	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

From Ambry Genetics, SCV002671231.2

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

Description

The p.Q2467R variant (also known as c.7400A>G), located in coding exon 59 of the FBN1 gene, results from an A to G substitution at nucleotide position 7400. The glutamine at codon 2467 is replaced by arginine, an amino acid with highly similar properties, and is located in the cbEGF-like #38 domain. An alternate substitution, p.Q2467P, has been reported in a Marfan syndrome cohort; however, clinical details were limited (Franken R et al. Eur. Heart J., 2016 Nov;37:3285-3290). This amino acid position is not 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: Oct 20, 2024

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