rs1554401830

Positions:

• chr7-128856856-A-ATGCT

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_001458.5(FLNC):​c.7496_7497insTGCT​(p.Gln2499HisfsTer46) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: FLNC NM_001458.5 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 0.0750

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]

FLNC-AS1 (HGNC:53474): (FLNC antisense RNA 1)

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 7-128856856-A-ATGCT is Pathogenic according to our data. Variant chr7-128856856-A-ATGCT is described in ClinVar as [Pathogenic]. Clinvar id is 539334.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FLNC	NM_001458.5	c.7496_7497insTGCT	p.Gln2499HisfsTer46	frameshift_variant	45/48	ENST00000325888.13
FLNC-AS1	NR_149055.1	n.103-3460_103-3459insAGCA		intron_variant, non_coding_transcript_variant
FLNC	NM_001127487.2	c.7397_7398insTGCT	p.Gln2466HisfsTer46	frameshift_variant	44/47

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FLNC	ENST00000325888.13	c.7496_7497insTGCT	p.Gln2499HisfsTer46	frameshift_variant	45/48	1	NM_001458.5	P3
FLNC	ENST00000346177.6	c.7397_7398insTGCT	p.Gln2466HisfsTer46	frameshift_variant	44/47	1		A1
FLNC-AS1	ENST00000469965.1	n.103-3460_103-3459insAGCA		intron_variant, non_coding_transcript_variant		4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Myofibrillar myopathy 5;C3279722:Distal myopathy with posterior leg and anterior hand involvement;C4310749:Hypertrophic cardiomyopathy 26;CN239310:Dilated Cardiomyopathy, Dominant Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 16, 2022

For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 539334). This variant has not been reported in the literature in individuals affected with FLNC-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Gln2499Hisfs*46) in the FLNC gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in FLNC are known to be pathogenic (PMID: 27908349). -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1554401830; hg19: chr7-128496910;