rs1555394149
Variant summary
Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM1PM2PP2PP3_StrongPP5_Moderate
The NM_000138.5(FBN1):c.7742G>T(p.Cys2581Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).
Frequency
Genomes: not found (cov: 32)
Consequence
FBN1
NM_000138.5 missense
NM_000138.5 missense
Scores
12
4
1
Clinical Significance
Conservation
PhyloP100: 7.91
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 Pathogenic. Variant got 11 ACMG points.
PM1
In a disulfide_bond (size 13) in uniprot entity FBN1_HUMAN there are 6 pathogenic changes around while only 0 benign (100%) in NM_000138.5
PM2
Very rare variant in population databases, with high coverage;
PP2
Missense variant in gene, where missense usually causes diseases (based on misZ statistic), FBN1. . Gene score misZ 5.0644 (greater than the threshold 3.09). Trascript score misZ 8.1787 (greater than threshold 3.09). GenCC has associacion of gene with MASS syndrome, Weill-Marchesani syndrome, geleophysic dysplasia, Shprintzen-Goldberg syndrome, Acromicric dysplasia, familial thoracic aortic aneurysm and aortic dissection, progeroid and marfanoid aspect-lipodystrophy syndrome, ectopia lentis 1, isolated, autosomal dominant, Marfan syndrome, Weill-Marchesani syndrome 2, dominant, isolated ectopia lentis, neonatal Marfan syndrome, stiff skin syndrome.
PP3
MetaRNN computational evidence supports a deleterious effect, 0.996
PP5
Variant 15-48420764-C-A is Pathogenic according to our data. Variant chr15-48420764-C-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 519750.Status of the report is criteria_provided_single_submitter, 1 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
FBN1 | NM_000138.5 | c.7742G>T | p.Cys2581Phe | missense_variant | 63/66 | ENST00000316623.10 | NP_000129.3 | |
FBN1 | NM_001406716.1 | c.7742G>T | p.Cys2581Phe | missense_variant | 62/65 | NP_001393645.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
FBN1 | ENST00000316623.10 | c.7742G>T | p.Cys2581Phe | missense_variant | 63/66 | 1 | NM_000138.5 | ENSP00000325527.5 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
GnomAD4 exome Cov.: 32
GnomAD4 exome
Cov.:
32
GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
ClinVar
Significance: Likely pathogenic
Submissions summary: Pathogenic:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Familial thoracic aortic aneurysm and aortic dissection Pathogenic:1
Likely pathogenic, criteria provided, single submitter | clinical testing | Ambry Genetics | Dec 23, 2016 | The p.C2581F alteration (also known as c.7742G>T), located in coding exon 62 of the FBN1 gene, results from a G to T substitution at nucleotide position 7742. The cysteine at codon 2581 is replaced by phenylalanine, an amino acid with highly dissimilar properties. This alteration has been reported in an individual with classic Marfan syndrome (Loeys B et al. Arch. Intern. Med., 2001 Nov;161:2447-54). Several alternate amino acid substitutions at this position have been reported in individuals with Marfan syndrome, including a reported de novo case with p.C2581S, suggesting this position to be a mutation hotspot (Hilhorst-Hofstee Y et al. J. Child Neurol., 2008 Aug;23:954-5; Howarth R et al. Genet. Test., 2007;11:146-52; Körkkö J et al. J. Med. Genet., 2002 Jan;39:34-41; Turner CL et al. Am. J. Med. Genet. A, 2009 Feb;149A:161-70). This amino acid is located in calcium-binding EGF-like (cbEGF) domain 45, and is predicted to participate in disulfide bonding. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. The majority of FBN1 mutations identified to date have involved the substitution or generation of cysteine residues within cbEGF domains (Vollbrandt T et al. J Biol Chem. 2004;279(31):32924-32931). Based on the majority of available evidence to date, this variant is likely to be pathogenic. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Uncertain
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D
M_CAP
Pathogenic
D
MetaRNN
Pathogenic
D
MetaSVM
Pathogenic
D
PrimateAI
Uncertain
T
PROVEAN
Pathogenic
D
REVEL
Pathogenic
Sift
Uncertain
D
Sift4G
Pathogenic
D
Vest4
MutPred
Loss of disorder (P = 0.0607);
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