rs61734479

Positions:

• chr14-91936950-C-A
• chr14-91936950-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM2 PM5 BP4

The NM_006329.4(FBLN5):​c.376G>T​(p.Val126Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V126M) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FBLN5 NM_006329.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.08

Genes affected

FBLN5 (HGNC:3602): (fibulin 5) The protein encoded by this gene is a secreted, extracellular matrix protein containing an Arg-Gly-Asp (RGD) motif and calcium-binding EGF-like domains. It promotes adhesion of endothelial cells through interaction of integrins and the RGD motif. It is prominently expressed in developing arteries but less so in adult vessels. However, its expression is reinduced in balloon-injured vessels and atherosclerotic lesions, notably in intimal vascular smooth muscle cells and endothelial cells. Therefore, the protein encoded by this gene may play a role in vascular development and remodeling. Defects in this gene are a cause of autosomal dominant cutis laxa, autosomal recessive cutis laxa type I (CL type I), and age-related macular degeneration type 3 (ARMD3). [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr14-91936950-C-T is described in Lovd as [Likely_pathogenic].
• BP4: Computational evidence support a benign effect (MetaRNN=0.32373214).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FBLN5	NM_006329.4	c.376G>T	p.Val126Leu	missense_variant	4/11	ENST00000342058.9	NP_006320.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FBLN5	ENST00000342058.9	c.376G>T	p.Val126Leu	missense_variant	4/11	1	NM_006329.4	ENSP00000345008	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.070
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.093	T;T;T
Eigen	Benign	-0.066
Eigen_PC	Benign	0.11
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.78	T;T;T
M_CAP	Benign	0.067	D
MetaRNN	Benign	0.32	T;T;T
MetaSVM	Uncertain	-0.12	T
MutationAssessor	Benign	1.4	.;L;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Benign	0.48	T
PROVEAN	Benign	-1.4	N;N;N
REVEL	Uncertain	0.46
Sift	Uncertain	0.024	D;T;T
Sift4G	Benign	0.24	T;T;T
Polyphen		0.46	P;B;B
Vest4		0.52
MutPred		0.40		Gain of catalytic residue at V167 (P = 0.0017);.;.;
MVP		0.76
MPC		0.47
ClinPred		0.85	D
GERP RS		4.8
Varity_R		0.29
gMVP		0.58

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

Other links and lift over

dbSNP: rs61734479; hg19: chr14-92403294;