X-154366144-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_001110556.2(FLNA):c.1309C>G(p.Arg437Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000182 in 1,096,295 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R437Q) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 25)
  • Exomes 𝑓: 0.0000018 (0 hom. 0 hem.)
• Consequence: FLNA NM_001110556.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.19

Genes affected

FLNA (HGNC:3754): (filamin A) The protein encoded by this gene is an actin-binding protein that crosslinks actin filaments and links actin filaments to membrane glycoproteins. The encoded protein is involved in remodeling the cytoskeleton to effect changes in cell shape and migration. This protein interacts with integrins, transmembrane receptor complexes, and second messengers. Defects in this gene are a cause of several syndromes, including periventricular nodular heterotopias (PVNH1, PVNH4), otopalatodigital syndromes (OPD1, OPD2), frontometaphyseal dysplasia (FMD), Melnick-Needles syndrome (MNS), and X-linked congenital idiopathic intestinal pseudoobstruction (CIIPX). Two transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Mar 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, FLNA
• BP4: Computational evidence support a benign effect (MetaRNN=0.37627506).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FLNA	NM_001110556.2	c.1309C>G	p.Arg437Gly	missense_variant	9/48	ENST00000369850.10
FLNA	NM_001456.4	c.1309C>G	p.Arg437Gly	missense_variant	9/47

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FLNA	ENST00000369850.10	c.1309C>G	p.Arg437Gly	missense_variant	9/48	1	NM_001110556.2

Frequencies

GnomAD3 genomes Cov.: 25

GnomAD4 exome AF: 0.00000182 AC: 2 AN: 1096295 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 362419

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: 0.00000238

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 25

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	-0.015	T
BayesDel_noAF	Benign	-0.26
Cadd	Benign	23
Dann	Benign	0.88
DEOGEN2	Uncertain	0.67	D;.;.;.;.
FATHMM_MKL	Benign	0.59	D
LIST_S2	Uncertain	0.95	D;D;.;D;D
M_CAP	Uncertain	0.11	D
MetaRNN	Benign	0.38	T;T;T;T;T
MetaSVM	Benign	-0.46	T
MutationAssessor	Benign	1.4	L;.;L;L;.
MutationTaster	Benign	0.68	N;N;N;N
PrimateAI	Benign	0.39	T
PROVEAN	Uncertain	-3.6	D;.;D;D;.
REVEL	Uncertain	0.33
Sift	Uncertain	0.013	D;.;D;D;.
Sift4G	Benign	0.077	T;T;T;T;T
Polyphen		0.0080	B;.;B;B;.
Vest4		0.49
MutPred		0.50		Loss of stability (P = 0.0274);.;Loss of stability (P = 0.0274);Loss of stability (P = 0.0274);.;
MVP		0.84
MPC		0.73
ClinPred		0.88	D
GERP RS		1.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.40
gMVP		0.54

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: rs863223644; hg19: chrX-153594512;