rs2228241

Positions:

chr15-48487353-G-A

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BS1BS4

This summary comes from the ClinGen Evidence Repository: NM_00138 c.3422C>T is a missense variant in FBN1 predicted to cause a substitution of a Proline by Leucine at amino acid 1141 (p.Pro1141Leu). This variant has been reported in the literature in at least 3 individuals in association with thoracic aortic aneurysm and dissection (TAAD), MASS syndrome, and features possibly consistent with Marfan syndrome (PMID:10533071; PMID:24740214; PMID:26188975). This variant was also identified in an internal proband with isolated TAAD with a family history highly specific for Marfan syndrome, however it does not segregate with disease in an affected family member (BS4) and therefore PP4 cannot be used. This variant has been previously reported in ClinVar as benign, likely benign, and uncertain significance (Variation ID: 42334). This variant has been identified in 0.026% of individuals of European origin (BS1; https://gnomad.broadinstitute.org/ version 2.1.1). Computational prediction tools and conservation analysis are unclear on the predicted impact on the protein. The constraint z-score for missense variants affecting FBN1 is 5.06, however due to the presence of two benign arguments PP2 cannot be used. In summary, this variant meets criteria to be classified as benign for Marfan syndrome based on the ACMG/AMP criteria applied, as specified by the ClinGen FBN1 VCEP: BS1, BS4 LINK:https://erepo.genome.network/evrepo/ui/classification/CA014098/MONDO:0007947/022

Frequency

Genomes: 𝑓 0.00057 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00051 ( 4 hom. )

Consequence

FBN1
NM_000138.5 missense

Scores

Clinical Significance

Benign reviewed by expert panel U:2B:16

Conservation

PhyloP100: 9.36

Variant links:

Genes affected

FBN1 (HGNC:3603): (fibrillin 1) This gene encodes a member of the fibrillin family of proteins. The encoded preproprotein is proteolytically processed to generate two proteins including the extracellular matrix component fibrillin-1 and the protein hormone asprosin. Fibrillin-1 is an extracellular matrix glycoprotein that serves as a structural component of calcium-binding microfibrils. These microfibrils provide force-bearing structural support in elastic and nonelastic connective tissue throughout the body. Asprosin, secreted by white adipose tissue, has been shown to regulate glucose homeostasis. Mutations in this gene are associated with Marfan syndrome and the related MASS phenotype, as well as ectopia lentis syndrome, Weill-Marchesani syndrome, Shprintzen-Goldberg syndrome and neonatal progeroid syndrome. [provided by RefSeq, Apr 2016]

FBN1 links:

FBN1 (HGNC:):

FBN1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BS1

For more information check the summary or visit ClinGen Evidence Repository.

BS4

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FBN1	NM_000138.5 linkuse as main transcript	c.3422C>T	p.Pro1141Leu	missense_variant	28/66	ENST00000316623.10	NP_000129.3	P35555
FBN1	NM_001406716.1 linkuse as main transcript	c.3422C>T	p.Pro1141Leu	missense_variant	27/65		NP_001393645.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FBN1	ENST00000316623.10 linkuse as main transcript	c.3422C>T	p.Pro1141Leu	missense_variant	28/66	1	NM_000138.5	ENSP00000325527.5		P35555

Frequencies

GnomAD3 genomes

AF:

0.000572

AC:

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.0182

Gnomad EAS

AF:

0.000384

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000250

Gnomad OTH

AF:

0.000955

GnomAD3 exomes

AF:

0.000903

AC:

227

AN:

251480

Hom.:

AF XY:

0.000846

AC XY:

115

AN XY:

135914

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.000173

Gnomad ASJ exome

AF:

0.0181

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000290

Gnomad OTH exome

AF:

0.000814

GnomAD4 exome

AF:

0.000508

AC:

742

AN:

1461884

Hom.:

Cov.:

AF XY:

0.000527

AC XY:

383

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000179

Gnomad4 ASJ exome

AF:

0.0189

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000140

Gnomad4 OTH exome

AF:

0.00137

GnomAD4 genome

AF:

0.000571

AC:

AN:

152310

Hom.:

Cov.:

AF XY:

0.000497

AC XY:

AN XY:

74476

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.0182

Gnomad4 EAS

AF:

0.000385

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000250

Gnomad4 OTH

AF:

0.000945

Alfa

AF:

0.00106

Hom.:

Bravo

AF:

0.000604

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00151

AC:

ExAC

AF:

0.000725

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000273

EpiControl

AF:

0.000237

ClinVar

Significance: Benign

Submissions summary: Uncertain:2Benign:16

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Marfan syndrome

Uncertain:1Benign:3

Likely benign, criteria provided, single submitter	clinical testing	Center for Human Genetics, Inc, Center for Human Genetics, Inc	Nov 01, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	May 01, 2019	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -
Uncertain significance, no assertion criteria provided	clinical testing	Center for Medical Genetics Ghent, University of Ghent	Nov 07, 2017	- -
Benign, reviewed by expert panel	curation	ClinGen FBN1 Variant Curation Expert Panel, ClinGen	Dec 01, 2022	NM_00138 c.3422C>T is a missense variant in FBN1 predicted to cause a substitution of a Proline by Leucine at amino acid 1141 (p.Pro1141Leu). This variant has been reported in the literature in at least 3 individuals in association with thoracic aortic aneurysm and dissection (TAAD), MASS syndrome, and features possibly consistent with Marfan syndrome (PMID: 10533071; PMID: 24740214; PMID: 26188975). This variant was also identified in an internal proband with isolated TAAD with a family history highly specific for Marfan syndrome, however it does not segregate with disease in an affected family member (BS4) and therefore PP4 cannot be used. This variant has been previously reported in ClinVar as benign, likely benign, and uncertain significance (Variation ID: 42334). This variant has been identified in 0.026% of individuals of European origin (BS1; https://gnomad.broadinstitute.org/ version 2.1.1). Computational prediction tools and conservation analysis are unclear on the predicted impact on the protein. The constraint z-score for missense variants affecting FBN1 is 5.06, however due to the presence of two benign arguments PP2 cannot be used. In summary, this variant meets criteria to be classified as benign for Marfan syndrome based on the ACMG/AMP criteria applied, as specified by the ClinGen FBN1 VCEP: BS1, BS4 -

Familial thoracic aortic aneurysm and aortic dissection

Benign:4

Benign, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	Sep 05, 2019	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	May 01, 2019	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -
Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	May 11, 2018	- -
Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Oct 24, 2016	This alteration is classified as 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. -

not provided

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Dec 29, 2020	This variant is associated with the following publications: (PMID: 25812041, 26188975, 10533071, 24941995, 24740214, 27153395, 25203624) -
Benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Oct 01, 2024	FBN1: BS1, BS2 -

Developmental cataract

Uncertain:1

Uncertain significance, no assertion criteria provided

research

Dept. Genetics and Cancer, Menzies Institute for Medical Research, University of Tasmania

May 01, 2021

- -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jan 02, 2019

The p.Pro1141Leu variant in FBN1 is classified as benign because it has been ide ntified in 1.8% of Ashkenazi Jewish chromosomes by gnomAD. ACMG/AMP Criteria app lied: BA1. -

Stiff skin syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

May 01, 2019

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Weill-Marchesani syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

May 01, 2019

Geleophysic dysplasia

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

May 01, 2019

Acromicric dysplasia

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

May 01, 2019

Marfan syndrome;C4707243:Familial thoracic aortic aneurysm and aortic dissection

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 25, 2024

- -

Ectopia lentis 1, isolated, autosomal dominant

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

May 01, 2019

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Uncertain

0.061

BayesDel_noAF

Pathogenic

0.15

CADD

Pathogenic

DANN

Pathogenic

1.0

Eigen

Pathogenic

0.78

Eigen_PC

Pathogenic

0.78

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.91

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.025

MetaSVM

Uncertain

0.58

PrimateAI

Uncertain

0.59

PROVEAN

Pathogenic

-8.8

REVEL

Pathogenic

0.69

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.042

Vest4

0.70

MVP

0.81

MPC

1.4

ClinPred

0.28

GERP RS

5.6

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