7-128850406-C-G

Variant names:

• chr7-128850406-C-G
• rs1273796039
• NM_001458.5:c.5321C>G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001458.5(FLNC):​c.5321C>G​(p.Pro1774Arg) variant causes a missense change. 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: 4.13

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 Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.30765882).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FLNC	NM_001458.5	c.5321C>G	p.Pro1774Arg	missense_variant	Exon 32 of 48	ENST00000325888.13	NP_001449.3
FLNC	NM_001127487.2	c.5222C>G	p.Pro1741Arg	missense_variant	Exon 31 of 47		NP_001120959.1
FLNC-AS1	NR_149055.1	n.316-1G>C		splice_acceptor_variant, intron_variant	Intron 3 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FLNC	ENST00000325888.13	c.5321C>G	p.Pro1774Arg	missense_variant	Exon 32 of 48	1	NM_001458.5	ENSP00000327145.8
FLNC	ENST00000346177.6	c.5222C>G	p.Pro1741Arg	missense_variant	Exon 31 of 47	1		ENSP00000344002.6
FLNC-AS1	ENST00000469965.1	n.316-1G>C		splice_acceptor_variant, intron_variant	Intron 3 of 3	4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.00000378

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

May 22, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces proline, which is neutral and non-polar, with arginine, which is basic and polar, at codon 1774 of the FLNC protein (p.Pro1774Arg). This variant is not present in population databases (gnomAD no frequency). 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: 1447356). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on FLNC protein function. 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: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.030
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.67	D;.
Eigen	Benign	-0.025
Eigen_PC	Benign	0.075
FATHMM_MKL	Benign	0.74	D
LIST_S2	Uncertain	0.87	D;D
M_CAP	Benign	0.056	D
MetaRNN	Benign	0.31	T;T
MetaSVM	Uncertain	0.30	D
MutationAssessor	Benign	0.0	N;.
PrimateAI	Uncertain	0.71	T
PROVEAN	Uncertain	-3.3	D;D
REVEL	Uncertain	0.49
Sift	Uncertain	0.0040	D;D
Sift4G	Benign	0.14	T;T
Polyphen		0.0090	B;P
Vest4		0.53
MutPred		0.35		Loss of loop (P = 0.1258);.;
MVP		0.86
MPC		0.33
ClinPred		0.90	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.23
gMVP		0.52

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: rs1273796039; hg19: chr7-128490460;