15-48425834-A-G
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Variant summary
Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1PM2PP2
The NM_000138.5(FBN1):āc.7235T>Cā(p.Val2412Ala) variant causes a missense change. The variant allele was found at a frequency of 0.000000685 in 1,459,880 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (ā ). Synonymous variant affecting the same amino acid position (i.e. V2412V) has been classified as Likely benign.
Frequency
Genomes: not found (cov: 32)
Exomes š: 6.8e-7 ( 0 hom. )
Consequence
FBN1
NM_000138.5 missense
NM_000138.5 missense
Scores
5
12
Clinical Significance
Conservation
PhyloP100: 6.31
Genes affected
FBN1 (HGNC:3603): (fibrillin 1) This gene encodes a member of the fibrillin family of proteins. The encoded preproprotein is proteolytically processed to generate two proteins including the extracellular matrix component fibrillin-1 and the protein hormone asprosin. Fibrillin-1 is an extracellular matrix glycoprotein that serves as a structural component of calcium-binding microfibrils. These microfibrils provide force-bearing structural support in elastic and nonelastic connective tissue throughout the body. Asprosin, secreted by white adipose tissue, has been shown to regulate glucose homeostasis. Mutations in this gene are associated with Marfan syndrome and the related MASS phenotype, as well as ectopia lentis syndrome, Weill-Marchesani syndrome, Shprintzen-Goldberg syndrome and neonatal progeroid syndrome. [provided by RefSeq, Apr 2016]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 5 ACMG points.
PM1
In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 11 uncertain in NM_000138.5
PM2
Very rare variant in population databases, with high coverage;
PP2
Missense variant where missense usually causes diseases, FBN1
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
FBN1 | NM_000138.5 | c.7235T>C | p.Val2412Ala | missense_variant | 59/66 | ENST00000316623.10 | |
FBN1 | NM_001406716.1 | c.7235T>C | p.Val2412Ala | missense_variant | 58/65 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
FBN1 | ENST00000316623.10 | c.7235T>C | p.Val2412Ala | missense_variant | 59/66 | 1 | NM_000138.5 | P1 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
GnomAD4 exome AF: 6.85e-7 AC: 1AN: 1459880Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0AN XY: 726388
GnomAD4 exome
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1
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1459880
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29
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0
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726388
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GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
Bravo
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Marfan syndrome;C4707243:Familial thoracic aortic aneurysm and aortic dissection Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Sep 26, 2016 | In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a FBN1-related disease. This sequence change replaces valine with alanine at codon 2412 of the FBN1 protein (p.Val2412Ala). The valine residue is moderately conserved and there is a small physicochemical difference between valine and alanine. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Uncertain
DANN
Uncertain
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Uncertain
D
LIST_S2
Benign
T
M_CAP
Benign
D
MetaRNN
Uncertain
T
MetaSVM
Benign
T
MutationTaster
Benign
D
PrimateAI
Uncertain
T
PROVEAN
Benign
N
REVEL
Uncertain
Sift
Benign
T
Sift4G
Benign
T
Vest4
MutPred
Gain of ubiquitination at K2407 (P = 0.115);
MVP
MPC
ClinPred
D
GERP RS
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at