22-45518754-C-T

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_006486.3(FBLN1):c.152C>T(p.Ser51Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000186 in 1,612,112 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 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000019 ( 0 hom. )

Consequence

FBLN1
NM_006486.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 2.88

Variant links:

Genes affected

FBLN1 (HGNC:3600): (fibulin 1) Fibulin 1 is a secreted glycoprotein that becomes incorporated into a fibrillar extracellular matrix. Calcium-binding is apparently required to mediate its binding to laminin and nidogen. It mediates platelet adhesion via binding fibrinogen. Four splice variants which differ in the 3' end have been identified. Each variant encodes a different isoform, but no functional distinctions have been identified among the four variants. [provided by RefSeq, Jul 2008]

FBLN1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.24786243).

BS2

High AC in GnomAdExome at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
FBLN1	NM_006486.3 linkuse as main transcript	c.152C>T	p.Ser51Leu	missense_variant	2/17	ENST00000327858.11
FBLN1	NM_001996.4 linkuse as main transcript	c.152C>T	p.Ser51Leu	missense_variant	2/15
FBLN1	NM_006485.4 linkuse as main transcript	c.152C>T	p.Ser51Leu	missense_variant	2/15
FBLN1	NM_006487.3 linkuse as main transcript	c.152C>T	p.Ser51Leu	missense_variant	2/15

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FBLN1	ENST00000327858.11 linkuse as main transcript	c.152C>T	p.Ser51Leu	missense_variant	2/17	1	NM_006486.3	P1	P23142-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152192

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:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000325

AC:

AN:

246260

Hom.:

AF XY:

0.0000525

AC XY:

AN XY:

133266

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000110

Gnomad SAS exome

AF:

0.000100

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000270

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000192

AC:

AN:

1459920

Hom.:

Cov.:

AF XY:

0.0000262

AC XY:

AN XY:

726042

show subpopulations

Gnomad4 AFR exome

AF:

0.0000598

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000505

Gnomad4 SAS exome

AF:

0.0000817

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000135

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152192

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74342

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ExAC

AF:

0.0000412

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 22, 2023

The c.152C>T (p.S51L) alteration is located in exon 2 (coding exon 2) of the FBLN1 gene. This alteration results from a C to T substitution at nucleotide position 152, causing the serine (S) at amino acid position 51 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Nov 07, 2023

This sequence change replaces serine, which is neutral and polar, with leucine, which is neutral and non-polar, at codon 51 of the FBLN1 protein (p.Ser51Leu). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with FBLN1-related conditions. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Pathogenic

0.18

BayesDel_noAF

Pathogenic

0.24

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Benign

0.21

T;T;T;.;.;T;.;.;T

Eigen

Benign

-0.12

Eigen_PC

Benign

0.031

FATHMM_MKL

Uncertain

0.79

LIST_S2

Uncertain

0.87

D;T;D;D;D;D;D;D;T

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.25

T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

-0.019

MutationTaster

Benign

0.98

D;D;D;D;D;D

PrimateAI

Benign

0.38

PROVEAN

Benign

-2.0

N;D;N;N;N;N;N;N;N

REVEL

Benign

0.15

Sift

Uncertain

0.0030

D;D;D;D;D;D;D;D;D

Sift4G

Uncertain

0.0040

D;D;D;D;D;D;D;T;D

Polyphen

0.082, 0.13, 0.066

.;.;.;B;B;B;.;.;.

Vest4

0.43, 0.43, 0.42, 0.44, 0.41

MutPred

0.44

.;.;Gain of catalytic residue at S51 (P = 5e-04);Gain of catalytic residue at S51 (P = 5e-04);Gain of catalytic residue at S51 (P = 5e-04);Gain of catalytic residue at S51 (P = 5e-04);Gain of catalytic residue at S51 (P = 5e-04);Gain of catalytic residue at S51 (P = 5e-04);.;

MVP

0.96

MPC

1.0

ClinPred

0.20

GERP RS

4.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.094

gMVP

0.72

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