rs28763926

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 1P and 20B. PP2BP4_StrongBP6_Very_StrongBS1BS2

The NM_001999.4(FBN2):c.7181T>C(p.Ile2394Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00402 in 1,613,968 control chromosomes in the GnomAD database, including 17 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I2394V) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0027 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0042 ( 17 hom. )

Consequence

FBN2
NM_001999.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:17

Conservation

PhyloP100: 7.50

Variant links:

Genes affected

FBN2 (HGNC:3604): (fibrillin 2) The protein encoded by this gene is a component of connective tissue microfibrils and may be involved in elastic fiber assembly. Mutations in this gene cause congenital contractural arachnodactyly. [provided by RefSeq, Jul 2008]

FBN2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -19 ACMG points.

PP2

Missense variant where missense usually causes diseases, FBN2

BP4

Computational evidence support a benign effect (MetaRNN=0.019796938).

BP6

Variant 5-128278799-A-G is Benign according to our data. Variant chr5-128278799-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 210999.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr5-128278799-A-G is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00269 (410/152266) while in subpopulation NFE AF= 0.00509 (346/68026). AF 95% confidence interval is 0.00464. There are 0 homozygotes in gnomad4. There are 167 alleles in male gnomad4 subpopulation. This position pass quality control queck.

BS2

High AC in GnomAd at 410 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FBN2	NM_001999.4 linkuse as main transcript	c.7181T>C	p.Ile2394Thr	missense_variant	57/65	ENST00000262464.9
FBN2	XM_017009228.3 linkuse as main transcript	c.7028T>C	p.Ile2343Thr	missense_variant	56/64

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FBN2	ENST00000262464.9 linkuse as main transcript	c.7181T>C	p.Ile2394Thr	missense_variant	57/65	1	NM_001999.4	P1	P35556-1
FBN2	ENST00000703783.1 linkuse as main transcript	n.3965T>C		non_coding_transcript_exon_variant	32/38

Frequencies

GnomAD3 genomes

AF:

0.00269

AC:

410

AN:

152148

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000700

Gnomad AMI

AF:

0.00110

Gnomad AMR

AF:

0.000720

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000829

Gnomad FIN

AF:

0.00122

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00509

Gnomad OTH

AF:

0.00287

GnomAD3 exomes

AF:

0.00232

AC:

581

AN:

250900

Hom.:

AF XY:

0.00232

AC XY:

314

AN XY:

135598

show subpopulations

Gnomad AFR exome

AF:

0.000738

Gnomad AMR exome

AF:

0.000521

Gnomad ASJ exome

AF:

0.0000994

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000294

Gnomad FIN exome

AF:

0.000879

Gnomad NFE exome

AF:

0.00449

Gnomad OTH exome

AF:

0.00213

GnomAD4 exome

AF:

0.00416

AC:

6081

AN:

1461702

Hom.:

Cov.:

AF XY:

0.00415

AC XY:

3020

AN XY:

727130

show subpopulations

Gnomad4 AFR exome

AF:

0.000597

Gnomad4 AMR exome

AF:

0.000559

Gnomad4 ASJ exome

AF:

0.000115

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000383

Gnomad4 FIN exome

AF:

0.00137

Gnomad4 NFE exome

AF:

0.00520

Gnomad4 OTH exome

AF:

0.00227

GnomAD4 genome

AF:

0.00269

AC:

410

AN:

152266

Hom.:

Cov.:

AF XY:

0.00224

AC XY:

167

AN XY:

74466

show subpopulations

Gnomad4 AFR

AF:

0.000698

Gnomad4 AMR

AF:

0.000720

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000830

Gnomad4 FIN

AF:

0.00122

Gnomad4 NFE

AF:

0.00509

Gnomad4 OTH

AF:

0.00284

Alfa

AF:

0.00335

Hom.:

Bravo

AF:

0.00250

TwinsUK

AF:

0.00782

AC:

ALSPAC

AF:

0.00389

AC:

ESP6500AA

AF:

0.00204

AC:

ESP6500EA

AF:

0.00372

AC:

ExAC

AF:

0.00231

AC:

280

EpiCase

AF:

0.00398

EpiControl

AF:

0.00403

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:17

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:8

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 20, 2021	This variant is associated with the following publications: (PMID: 29307552, 29307550) -
Likely benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Likely benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Mar 06, 2017	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Oct 13, 2023	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Apr 01, 2024	FBN2: BS1 -

not specified

Benign:3

Likely benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Apr 23, 2015	- -
Likely benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jul 29, 2023	- -

Congenital contractural arachnodactyly

Benign:2

Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Likely benign, criteria provided, single submitter	clinical testing	Invitae	Jan 31, 2024	- -

Connective tissue disorder

Benign:2

Benign, criteria provided, single submitter	clinical testing	Genome Diagnostics Laboratory, The Hospital for Sick Children	Mar 31, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	Center for Human Genetics, Inc, Center for Human Genetics, Inc	Nov 01, 2016	- -

Familial thoracic aortic aneurysm and aortic dissection

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 07, 2018

This alteration is classified as likely 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. -

Ehlers-Danlos syndrome

Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Jan 20, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.11

Cadd

Uncertain

Dann

Uncertain

0.99

DEOGEN2

Benign

0.17

T;.;T

Eigen

Benign

-0.30

Eigen_PC

Benign

-0.020

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.70

T;.;.

M_CAP

Benign

0.036

MetaRNN

Benign

0.020

T;T;T

MetaSVM

Benign

-0.69

MutationAssessor

Benign

-1.2

N;.;N

MutationTaster

Benign

0.94

N;N

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-0.98

N;.;N

REVEL

Uncertain

0.33

Sift

Benign

0.16

T;.;T

Polyphen

0.0040

B;.;B

Vest4

0.19

MVP

0.24

MPC

0.30

ClinPred

0.020

GERP RS

5.1

Varity_R

0.11

gMVP

0.60

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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