7-128846136-C-G

Variant names:

• chr7-128846136-C-G
• rs766330686
• NM_001458.5:c.3937C>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001458.5(FLNC):​c.3937C>G​(p.Arg1313Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,804 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1313Q) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: FLNC NM_001458.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.420

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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FLNC	NM_001458.5	c.3937C>G	p.Arg1313Gly	missense_variant	Exon 22 of 48	ENST00000325888.13	NP_001449.3
FLNC	NM_001127487.2	c.3937C>G	p.Arg1313Gly	missense_variant	Exon 22 of 47		NP_001120959.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FLNC	ENST00000325888.13	c.3937C>G	p.Arg1313Gly	missense_variant	Exon 22 of 48	1	NM_001458.5	ENSP00000327145.8
FLNC	ENST00000346177.6	c.3937C>G	p.Arg1313Gly	missense_variant	Exon 22 of 47	1		ENSP00000344002.6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000803 AC: 2 AN: 249112 Hom.: 0 AF XY: 0.0000148 AC XY: 2 AN XY: 135268

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000177

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461804 Hom.: 0 Cov.: 34 AF XY: 0.00000275 AC XY: 2 AN XY: 727206

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.00

EpiControl AF: 0.0000593

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

Feb 23, 2019

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 do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with FLNC-related disease. This variant is present in population databases (rs766330686, ExAC 0.003%). This sequence change replaces arginine with glycine at codon 1313 of the FLNC protein (p.Arg1313Gly). The arginine residue is moderately conserved and there is a moderate physicochemical difference between arginine and glycine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Uncertain	-0.030
CADD	Benign	22
DANN	Benign	0.96
DEOGEN2	Uncertain	0.68	D;.
Eigen	Benign	-0.33
Eigen_PC	Benign	-0.26
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Benign	0.85	D;T
M_CAP	Benign	0.064	D
MetaRNN	Uncertain	0.57	D;D
MetaSVM	Benign	-0.36	T
MutationAssessor	Benign	1.3	L;L
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-2.3	N;N
REVEL	Pathogenic	0.65
Sift	Benign	0.37	T;T
Sift4G	Benign	0.29	T;T
Polyphen		0.0070	B;P
Vest4		0.70
MutPred		0.61		Gain of catalytic residue at V1314 (P = 0.0186);Gain of catalytic residue at V1314 (P = 0.0186);
MVP		0.83
MPC		0.72
ClinPred		0.51	D
GERP RS		3.2
Varity_R		0.23
gMVP		0.70

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

LitVar

Other links and lift over

dbSNP: rs766330686; hg19: chr7-128486190;