7-128830641-A-G

Variant names:

• chr7-128830641-A-G
• NM_001458.5:c.4A>G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_001458.5(FLNC):​c.4A>G​(p.Met2Val) variant causes a missense 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. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: FLNC NM_001458.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.37

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM1: In a region_of_interest Actin-binding (size 258) in uniprot entity FLNC_HUMAN there are 10 pathogenic changes around while only 2 benign (83%) in NM_001458.5
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.289137).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FLNC	NM_001458.5	c.4A>G	p.Met2Val	missense_variant	Exon 1 of 48	ENST00000325888.13	NP_001449.3
FLNC	NM_001127487.2	c.4A>G	p.Met2Val	missense_variant	Exon 1 of 47		NP_001120959.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FLNC	ENST00000325888.13	c.4A>G	p.Met2Val	missense_variant	Exon 1 of 48	1	NM_001458.5	ENSP00000327145.8
FLNC	ENST00000346177.6	c.4A>G	p.Met2Val	missense_variant	Exon 1 of 47	1		ENSP00000344002.6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain: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 Uncertain:1

Apr 04, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. 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 replaces methionine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 2 of the FLNC protein (p.Met2Val). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.074	D
BayesDel_noAF	Benign	-0.13
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Benign	0.26	T;.
Eigen	Benign	-0.26
Eigen_PC	Benign	-0.11
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Benign	0.76	T;T
M_CAP	Pathogenic	0.38	D
MetaRNN	Benign	0.29	T;T
MetaSVM	Benign	-0.59	T
MutationAssessor	Benign	1.0	L;L
PrimateAI	Pathogenic	0.85	D
PROVEAN	Benign	-0.84	N;N
REVEL	Uncertain	0.39
Sift	Uncertain	0.020	D;D
Sift4G	Benign	0.36	T;T
Polyphen		0.0010	B;B
Vest4		0.35
MutPred		0.14		Loss of glycosylation at S5 (P = 0.1016);Loss of glycosylation at S5 (P = 0.1016);
MVP		0.87
MPC		1.0
ClinPred		0.30	T
GERP RS		4.0
Varity_R		0.34
gMVP		0.57

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr7-128470695;