rs28763945

Positions:

chr5-128345408-C-A

Variant summary

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

The NM_001999.4(FBN2):c.3166G>T(p.Ala1056Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00143 in 1,614,162 control chromosomes in the GnomAD database, including 26 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0072 ( 11 hom., cov: 32)

Exomes 𝑓: 0.00083 ( 15 hom. )

Consequence

FBN2
NM_001999.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11

Conservation

PhyloP100: 4.15

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 in gene, where missense usually causes diseases (based on misZ statistic), FBN2. . Gene score misZ 1.5491 (greater than the threshold 3.09). Trascript score misZ 3.2752 (greater than threshold 3.09). GenCC has associacion of gene with familial thoracic aortic aneurysm and aortic dissection, carpal tunnel syndrome, macular degeneration, early-onset, congenital contractural arachnodactyly.

BP4

Computational evidence support a benign effect (MetaRNN=0.009017587).

BP6

Variant 5-128345408-C-A is Benign according to our data. Variant chr5-128345408-C-A is described in ClinVar as [Likely_benign]. Clinvar id is 137324.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr5-128345408-C-A is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00723 (1101/152272) while in subpopulation AFR AF= 0.0248 (1031/41572). AF 95% confidence interval is 0.0235. There are 11 homozygotes in gnomad4. There are 498 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd4 at 1101 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FBN2	NM_001999.4 linkuse as main transcript	c.3166G>T	p.Ala1056Ser	missense_variant	24/65	ENST00000262464.9	NP_001990.2
FBN2	XM_017009228.3 linkuse as main transcript	c.3013G>T	p.Ala1005Ser	missense_variant	23/64		XP_016864717.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FBN2	ENST00000262464.9 linkuse as main transcript	c.3166G>T	p.Ala1056Ser	missense_variant	24/65	1	NM_001999.4	ENSP00000262464	P1	P35556-1
FBN2	ENST00000508989.5 linkuse as main transcript	c.3067G>T	p.Ala1023Ser	missense_variant	23/33	2		ENSP00000425596

Frequencies

GnomAD3 genomes

AF:

0.00722

AC:

1098

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0248

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00268

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000621

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000206

Gnomad OTH

AF:

0.00478

GnomAD3 exomes

AF:

0.00191

AC:

481

AN:

251420

Hom.:

AF XY:

0.00139

AC XY:

189

AN XY:

135902

show subpopulations

Gnomad AFR exome

AF:

0.0261

Gnomad AMR exome

AF:

0.000694

Gnomad ASJ exome

AF:

0.000298

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000131

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000167

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.000830

AC:

1213

AN:

1461890

Hom.:

Cov.:

AF XY:

0.000752

AC XY:

547

AN XY:

727246

show subpopulations

Gnomad4 AFR exome

AF:

0.0273

Gnomad4 AMR exome

AF:

0.000939

Gnomad4 ASJ exome

AF:

0.000230

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000696

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000104

Gnomad4 OTH exome

AF:

0.00180

GnomAD4 genome

AF:

0.00723

AC:

1101

AN:

152272

Hom.:

Cov.:

AF XY:

0.00669

AC XY:

498

AN XY:

74436

show subpopulations

Gnomad4 AFR

AF:

0.0248

Gnomad4 AMR

AF:

0.00268

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000622

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000206

Gnomad4 OTH

AF:

0.00473

Alfa

AF:

0.00178

Hom.:

Bravo

AF:

0.00830

ESP6500AA

AF:

0.0252

AC:

111

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.00228

AC:

277

Asia WGS

AF:

0.00173

AC:

AN:

3478

EpiCase

AF:

0.000273

EpiControl

AF:

0.000237

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:11

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:4

Likely benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Aug 24, 2023	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 14, 2013	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Oct 16, 2023	- -
Likely benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -

Congenital contractural arachnodactyly

Benign:2

Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 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. -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	- -

Familial thoracic aortic aneurysm and aortic dissection

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 29, 2014

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. -

Ehlers-Danlos syndrome

Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Nov 01, 2021

- -

Connective tissue disorder

Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Nov 01, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.072

BayesDel_addAF

Benign

-0.45

BayesDel_noAF

Benign

-0.40

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.12

T;.;T;T

Eigen

Benign

-0.64

Eigen_PC

Benign

-0.43

FATHMM_MKL

Uncertain

0.92

LIST_S2

Benign

0.59

T;.;.;T

MetaRNN

Benign

0.0090

T;T;T;T

MetaSVM

Benign

-0.90

MutationAssessor

Benign

-0.55

N;.;N;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.39

PROVEAN

Benign

-0.10

N;.;N;N

REVEL

Benign

0.26

Sift

Benign

0.31

T;.;T;T

Sift4G

Benign

0.78

.;.;.;T

Polyphen

0.0

B;.;B;B

Vest4

0.12

MVP

0.35

MPC

0.21

ClinPred

0.0023

GERP RS

3.5

Varity_R

0.037

gMVP

0.66

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