rs201335143
Positions:
Variant summary
Our verdict is Likely benign. Variant got -3 ACMG points: 1P and 4B. PP2BS2
The NM_001458.5(FLNC):c.3790G>A(p.Gly1264Ser) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000217 in 1,611,646 control chromosomes in the GnomAD database, with no homozygous occurrence. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)
Exomes 𝑓: 0.000018 ( 0 hom. )
Consequence
FLNC
NM_001458.5 missense, splice_region
NM_001458.5 missense, splice_region
Scores
6
9
4
Splicing: ADA: 0.9999
2
Clinical Significance
Conservation
PhyloP100: 9.99
Genes affected
FLNC (HGNC:3756): (filamin C) This gene encodes one of three related filamin genes, specifically gamma filamin. These filamin proteins crosslink actin filaments into orthogonal networks in cortical cytoplasm and participate in the anchoring of membrane proteins for the actin cytoskeleton. Three functional domains exist in filamin: an N-terminal filamentous actin-binding domain, a C-terminal self-association domain, and a membrane glycoprotein-binding domain. Mutations in this gene are a cause of cardiopathy. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2022]
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ACMG classification
Classification made for transcript
Verdict is Likely_benign. Variant got -3 ACMG points.
PP2
Missense variant in gene, where missense usually causes diseases (based on misZ statistic), FLNC. . Gene score misZ 2.789 (greater than the threshold 3.09). Trascript score misZ 5.9457 (greater than threshold 3.09). GenCC has associacion of gene with dilated cardiomyopathy, heart conduction disease, familial isolated restrictive cardiomyopathy, hypertrophic cardiomyopathy 26, distal myopathy with posterior leg and anterior hand involvement, myofibrillar myopathy 5.
BS2
High AC in GnomAd4 at 9 AD gene.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
FLNC | NM_001458.5 | c.3790G>A | p.Gly1264Ser | missense_variant, splice_region_variant | 21/48 | ENST00000325888.13 | NP_001449.3 | |
FLNC | NM_001127487.2 | c.3790G>A | p.Gly1264Ser | missense_variant, splice_region_variant | 21/47 | NP_001120959.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
FLNC | ENST00000325888.13 | c.3790G>A | p.Gly1264Ser | missense_variant, splice_region_variant | 21/48 | 1 | NM_001458.5 | ENSP00000327145.8 | ||
FLNC | ENST00000346177.6 | c.3790G>A | p.Gly1264Ser | missense_variant, splice_region_variant | 21/47 | 1 | ENSP00000344002.6 |
Frequencies
GnomAD3 genomes AF: 0.0000591 AC: 9AN: 152204Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.0000122 AC: 3AN: 245150Hom.: 0 AF XY: 0.0000225 AC XY: 3AN XY: 133508
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GnomAD4 exome AF: 0.0000178 AC: 26AN: 1459324Hom.: 0 Cov.: 32 AF XY: 0.0000262 AC XY: 19AN XY: 726154
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GnomAD4 genome AF: 0.0000591 AC: 9AN: 152322Hom.: 0 Cov.: 32 AF XY: 0.0000940 AC XY: 7AN XY: 74484
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:4
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Hypertrophic cardiomyopathy 26 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Victorian Clinical Genetics Services, Murdoch Childrens Research Institute | Jul 17, 2023 | Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as VUS-3B. Following criteria are met: 0103 - Loss of function and gain of function are known mechanisms of disease in this gene. Loss of function is the established mechanism of disease for variants in dilated cardiomyopathy (PMID: 32112656), familial hypertrophic cardiomyopathy 26 (MIM#617047), familial restrictive cardiomyopathy 5 (MIM#617047) and myofibrillar myopathy 5 (MIM#609524), and recently has been associated with arrhythmogenic right ventricular cardiomyopathy (MONDO#0016587; PMID: 31627847). In distal myopathy 4 (MIM#614065), NMD-predicted variants cause a loss of function; however, missense variants have been shown to result in a toxic gain of function (PMID: 32112656). (I) 0107 - This gene is associated with autosomal dominant disease. Variants located throughout the gene that are predicted to result in nonsense-mediated decay (NMD) are enriched in dilated cardiomyopathy, whereas missense variants in the ROD2 domain are enriched in familial hypertrophic cardiomyopathy 26 and familial restrictive cardiomyopathy 5 (MIM#617047). Additionally, myofibrillar myopathy 5 (MIM#609524) is known to result from either missense variants in the ROD2 domain or truncating variants in the Ig-like domain 24, while missense variants in the actin-binding domain and NMD-predicted variants located in the Ig-like domain 15 and have been reported for distal myopathy 4 (MIM#614065) (PMID: 32112656). (I) 0115 - Variants in this gene are known to have variable expressivity. Variable expressivity has been reported for arrhythmogenic right ventricular cardiomyopathy (PMID: 31627847). (I) 0200 - Variant is predicted to result in a missense amino acid change from glycine to serine. (I) 0251 - This variant is heterozygous. (I) 0302 - Variant is present in gnomAD (v3 non-v2) <0.001 for a dominant condition (8 heterozygotes, 0 homozygotes). (SP) 0501 - Missense variant consistently predicted to be damaging by multiple in silico tools or highly conserved with a major amino acid change. (SP) 0600 - Variant is located in the annotated filamin/ABP280 repeat domain (DECIPHER). (I) 0710 - Another missense variant comparable to the one identified in this case has inconclusive previous evidence for pathogenicity. The p.(Gly1264Ala) variant was reported by Puckelwartz M.J. et al. (2021) and classified as a 'suspicious' VUS; however, it is unclear if the variant was identified in a DCM or HCM individual (PMID: 33764162). In should also be noted that the p.(Gly1264Cys) variant which has a higher Grantham score has been classified as a VUS by clinical diagnostic laboratories (ClinVar). (I) 0809 - Previous evidence of pathogenicity for this variant is inconclusive. This variant has been classified once as a VUS by one clinical diagnostic laboratory (ClinVar). (I) 0905 - No published segregation evidence has been identified for this variant. (I) 1007 - No published functional evidence has been identified for this variant. (I) 1208 - Inheritance information for this variant is not currently available in this individual. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign - |
FLNC-related disorder Uncertain:1
Uncertain significance, no assertion criteria provided | clinical testing | PreventionGenetics, part of Exact Sciences | May 08, 2024 | The FLNC c.3790G>A variant is predicted to result in the amino acid substitution p.Gly1264Ser. The c.3790G nucleotide is the last nucleotide of exon 21 and the c.3790G>A variant is predicted to impact splicing at the adjacent splice donor site (SpliceAI, Jaganathan et al. 2019. PubMed ID: 30661751). However, such computer predictions are not equivalent to functional evidence. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.0033% of alleles in individuals of South Asian descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. - |
Cardiovascular phenotype Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Oct 19, 2023 | The p.G1264S variant (also known as c.3790G>A), located in coding exon 21 of the FLNC gene, results from a G to A substitution at nucleotide position 3790. The glycine at codon 1264 is replaced by serine, an amino acid with similar properties. However, this change occurs in the last base pair of coding exon 21 and may have some effect on normal mRNA splicing. This nucleotide position is highly conserved in available vertebrate species. In silico splice site analysis predicts that this alteration may result in the creation or strengthening of a novel splice donor site. This amino acid position is highly conserved in available vertebrate species. In addition, as a missense substitution this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. - |
Myofibrillar myopathy 5;C3279722:Distal myopathy with posterior leg and anterior hand involvement;C4310749:Hypertrophic cardiomyopathy 26;CN239310:Dilated Cardiomyopathy, Dominant Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jan 29, 2024 | This sequence change replaces glycine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 1264 of the FLNC protein (p.Gly1264Ser). This variant also falls at the last nucleotide of exon 21, which is part of the consensus splice site for this exon. This variant is present in population databases (rs201335143, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with FLNC-related conditions. ClinVar contains an entry for this variant (Variation ID: 539397). 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. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Uncertain
BayesDel_addAF
Uncertain
T
BayesDel_noAF
Benign
CADD
Pathogenic
DANN
Uncertain
DEOGEN2
Uncertain
D;.
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D;D
M_CAP
Pathogenic
D
MetaRNN
Uncertain
D;D
MetaSVM
Pathogenic
D
MutationAssessor
Pathogenic
M;M
PrimateAI
Uncertain
T
PROVEAN
Uncertain
D;D
REVEL
Uncertain
Sift
Benign
T;T
Sift4G
Benign
T;T
Polyphen
P;D
Vest4
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
dbscSNV1_RF
Pathogenic
SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_DG_spliceai
Position offset: 39
DS_DL_spliceai
Position offset: 0
Find out detailed SpliceAI scores and Pangolin per-transcript scores at