Genetic Variant FBN3:c.542-49C>A (chr19-8142186-G-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_032447.5(FBN3):c.542-49C>A variant causes a intron 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

FBN3
NM_032447.5 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.0340

Publications

4 publications found

Variant links:

Genes affected

FBN3 (HGNC:18794): (fibrillin 3) This gene encodes a memebr of the fibrillin protein family. Fibrillins are extracellular matrix molecules that assemble into microfibrils in many connective tissues. This gene is most highly expressed in fetal tissues and its protein product is localized to extracellular microfibrils of developing skeletal elements, skin, lung, kidney, and skeletal muscle. This gene is potentially involved in Weill-Marchesani syndrome. [provided by RefSeq, Mar 2016]

FBN3 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.91).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FBN3	NM_032447.5 link	c.542-49C>A		intron_variant	Intron 6 of 63	ENST00000600128.6	NP_115823.3	Q75N90A8KAY2

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
FBN3	ENST00000600128.6 link	c.542-49C>A	intron_variant	Intron 6 of 63	1	NM_032447.5	ENSP00000470498.1	Q75N90
FBN3	ENST00000270509.6 link	c.542-49C>A	intron_variant	Intron 5 of 62	1		ENSP00000270509.2	Q75N90
FBN3	ENST00000601739.5 link	c.542-49C>A	intron_variant	Intron 6 of 63	1		ENSP00000472324.1	Q75N90
FBN3	ENST00000651877.1 link	c.542-49C>A	intron_variant	Intron 5 of 63			ENSP00000498507.1	A0A494C0D8

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1334284

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

658812

African (AFR)

AF:

0.00

AC:

AN:

30796

American (AMR)

AF:

0.00

AC:

AN:

37110

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

23924

East Asian (EAS)

AF:

0.00

AC:

AN:

35996

South Asian (SAS)

AF:

0.00

AC:

AN:

78214

European-Finnish (FIN)

AF:

0.00

AC:

AN:

38218

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5516

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1028638

Other (OTH)

AF:

0.00

AC:

AN:

55872

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.91

CADD

Benign

0.91

(source)

DANN

Benign

0.63

PhyloP100

0.034

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over