rs369652475

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 1P and 11B. PP2BP4_ModerateBP6BS1BS2

The NM_001999.4(FBN2):c.5899C>T(p.His1967Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000792 in 1,577,590 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H1967R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000083 ( 3 hom. )

Consequence

FBN2
NM_001999.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 8.00

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 -10 ACMG points.

PP2

Missense variant where missense usually causes diseases, FBN2

BP4

Computational evidence support a benign effect (MetaRNN=0.19073969).

BP6

Variant 5-128302991-G-A is Benign according to our data. Variant chr5-128302991-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 528443.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=1}.

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.0000395 (6/152074) while in subpopulation SAS AF= 0.00104 (5/4826). AF 95% confidence interval is 0.000408. There are 0 homozygotes in gnomad4. There are 5 alleles in male gnomad4 subpopulation. This position pass quality control queck.

BS2

High AC in GnomAd at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FBN2	NM_001999.4 linkuse as main transcript	c.5899C>T	p.His1967Tyr	missense_variant	46/65	ENST00000262464.9
FBN2	XM_017009228.3 linkuse as main transcript	c.5746C>T	p.His1916Tyr	missense_variant	45/64

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FBN2	ENST00000262464.9 linkuse as main transcript	c.5899C>T	p.His1967Tyr	missense_variant	46/65	1	NM_001999.4	P1	P35556-1
FBN2	ENST00000703783.1 linkuse as main transcript	n.2683C>T		non_coding_transcript_exon_variant	21/38
FBN2	ENST00000703785.1 linkuse as main transcript	n.2602C>T		non_coding_transcript_exon_variant	20/27

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

152074

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00104

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000155

AC:

AN:

251372

Hom.:

AF XY:

0.000206

AC XY:

AN XY:

135854

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00124

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000835

AC:

119

AN:

1425516

Hom.:

Cov.:

AF XY:

0.000117

AC XY:

AN XY:

711890

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00136

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.27e-7

Gnomad4 OTH exome

AF:

0.0000169

GnomAD4 genome

AF:

0.0000395

AC:

AN:

152074

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74278

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00104

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000479

Bravo

AF:

0.00000378

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000214

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial thoracic aortic aneurysm and aortic dissection

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 17, 2023

The p.H1967Y variant (also known as c.5899C>T), located in coding exon 46 of the FBN2 gene, results from a C to T substitution at nucleotide position 5899. The histidine at codon 1967 is replaced by tyrosine, an amino acid with similar properties. This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Congenital contractural arachnodactyly

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Mar 22, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.081

BayesDel_noAF

Uncertain

0.070

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.72

D;.;D

Eigen

Uncertain

0.56

Eigen_PC

Uncertain

0.62

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.92

D;.;.

M_CAP

Benign

0.041

MetaRNN

Benign

0.19

T;T;T

MetaSVM

Uncertain

0.18

MutationAssessor

Benign

0.63

N;.;N

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.77

PROVEAN

Pathogenic

-4.4

D;.;D

REVEL

Pathogenic

0.71

Sift

Benign

0.29

T;.;T

Polyphen

0.93

P;.;P

Vest4

0.61

MVP

0.54

MPC

0.89

ClinPred

0.16

GERP RS

5.3

Varity_R

0.32

gMVP

0.47

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