NM_000138.5(FBN1):c.4143G>C (p.Lys1381Asn) AND multiple conditions

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Apr 11, 2023
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:: RCV001315990.7

Allele description [Variation Report for NM_000138.5(FBN1):c.4143G>C (p.Lys1381Asn)]

NM_000138.5(FBN1):c.4143G>C (p.Lys1381Asn)

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.4143G>C (p.Lys1381Asn)

HGVS:

NC_000015.10:g.48474322C>G
NG_008805.2:g.176467G>C
NM_000138.5:c.4143G>CMANE SELECT
NP_000129.3:p.Lys1381Asn
LRG_778:g.176467G>C
NC_000015.9:g.48766519C>G

Protein change:

K1381N

Links:

dbSNP: rs2043402274

NCBI 1000 Genomes Browser:

rs2043402274

Molecular consequence:

NM_000138.5:c.4143G>C - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Marfan syndrome (MFS)
Synonyms:: MARFAN SYNDROME, TYPE I; Marfan syndrome type 1; Marfan's syndrome; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0007947; MedGen: C0024796; Orphanet: 284963; Orphanet: 558; OMIM: 154700

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
SCV001506590	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Apr 11, 2023)	germline	clinical testing	PubMed (2) [See all records that cite these PMIDs] 19293843, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV001506590

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Apr 11, 2023)

germline

clinical testing

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

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

Identification of the minimal combination of clinical features in probands for efficient mutation detection in the FBN1 gene.

Stheneur C, Collod-Béroud G, Faivre L, Buyck JF, Gouya L, Le Parc JM, Moura B, Muti C, Grandchamp B, Sultan G, Claustres M, Aegerter P, Chevallier B, Jondeau G, Boileau C.

Eur J Hum Genet. 2009 Sep;17(9):1121-8. doi: 10.1038/ejhg.2009.36. Epub 2009 Mar 18.

PubMed [citation]

PMID:: 19293843
PMCID:: PMC2986588

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV001506590.4

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

Description

This sequence change replaces lysine, which is basic and polar, with asparagine, which is neutral and polar, at codon 1381 of the FBN1 protein (p.Lys1381Asn). This variant is not present in population databases (gnomAD no frequency). 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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt FBN1 protein function. ClinVar contains an entry for this variant (Variation ID: 1016915). This missense change has been observed in individual(s) with Marfan syndrome (PMID: 19293843). In at least one individual the variant was observed to be de novo.

#	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: Sep 29, 2024

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