Genetic Variant FBLN2:p.Ala53Thr (chr3-13570512-G-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001004019.2(FBLN2):c.157G>A(p.Ala53Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000227 in 1,586,078 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000023 ( 0 hom. )

Consequence

FBLN2
NM_001004019.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.24

Variant links:

Genes affected

FBLN2 (HGNC:3601): (fibulin 2) This gene encodes an extracellular matrix protein, which belongs to the fibulin family. This protein binds various extracellular ligands and calcium. It may play a role during organ development, in particular, during the differentiation of heart, skeletal and neuronal structures. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

FBLN2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.021008223).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FBLN2	NM_001004019.2 link	c.157G>A	p.Ala53Thr	missense_variant	Exon 2 of 18	ENST00000404922.8	NP_001004019.1	P98095-2Q9Y3V7Q86V58
FBLN2	NM_001165035.2 link	c.157G>A	p.Ala53Thr	missense_variant	Exon 2 of 18		NP_001158507.1	P98095-2Q9Y3V7Q86V58
FBLN2	NM_001998.3 link	c.157G>A	p.Ala53Thr	missense_variant	Exon 2 of 17		NP_001989.2	P98095-1Q9Y3V7Q86V58

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
FBLN2	ENST00000404922.8 link	c.157G>A	p.Ala53Thr	missense_variant	Exon 2 of 18	5	NM_001004019.2	ENSP00000384169.3	P98095-2
FBLN2	ENST00000295760.11 link	c.157G>A	p.Ala53Thr	missense_variant	Exon 2 of 17	1		ENSP00000295760.7	P98095-1
FBLN2	ENST00000492059.5 link	c.157G>A	p.Ala53Thr	missense_variant	Exon 2 of 18	2		ENSP00000420042.1	P98095-2
FBLN2	ENST00000465610.1 link	c.157G>A	p.Ala53Thr	missense_variant	Exon 2 of 2	2		ENSP00000420164.1	C9JQS6

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152206

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000152

AC:

AN:

203990

Hom.:

AF XY:

0.0000987

AC XY:

AN XY:

111452

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000980

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000192

GnomAD4 exome

AF:

0.0000230

AC:

AN:

1433754

Hom.:

Cov.:

AF XY:

0.0000183

AC XY:

AN XY:

709828

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000796

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152324

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74474

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000688

Hom.:

Bravo

AF:

0.0000416

ExAC

AF:

0.000134

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 22, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.157G>A (p.A53T) alteration is located in exon 2 (coding exon 1) of the FBLN2 gene. This alteration results from a G to A substitution at nucleotide position 157, causing the alanine (A) at amino acid position 53 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.094

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.49

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.30

.;T;T;.

Eigen

Uncertain

0.42

Eigen_PC

Uncertain

0.39

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.91

.;D;D;D

M_CAP

Benign

0.030

MetaRNN

Benign

0.021

T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.0

M;M;.;M

PrimateAI

Benign

0.43

PROVEAN

Benign

-1.2

N;N;N;N

REVEL

Benign

0.11

Sift

Uncertain

0.023

D;D;T;D

Sift4G

Uncertain

0.058

T;T;T;T

Polyphen

0.99

D;D;.;D

Vest4

0.35

MVP

0.33

MPC

0.50

ClinPred

0.11

GERP RS

5.0

Varity_R

0.075

gMVP

0.29

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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