rs1557175308

chrX-154349533-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP6

The NM_001110556.2(FLNA):c.7585G>A(p.Glu2529Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000182 in 1,097,956 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E2529D) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 27)
  • Exomes 𝑓: 0.0000018 (0 hom. 1 hem.)
• Consequence: FLNA NM_001110556.2 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: 7.78

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
• BP6: Variant X-154349533-C-T is Benign according to our data. Variant chrX-154349533-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 521201.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Likely_benign=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FLNA	NM_001110556.2	c.7585G>A	p.Glu2529Lys	missense_variant	47/48	ENST00000369850.10
FLNA	NM_001456.4	c.7561G>A	p.Glu2521Lys	missense_variant	46/47

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FLNA	ENST00000369850.10	c.7585G>A	p.Glu2529Lys	missense_variant	47/48	1	NM_001110556.2

Frequencies

GnomAD3 genomes Cov.: 27

GnomAD3 exomes AF: 0.00000551 AC: 1 AN: 181458 Hom.: 0 AF XY: 0.0000148 AC XY: 1 AN XY: 67558

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000365

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000182 AC: 2 AN: 1097956 Hom.: 0 Cov.: 33 AF XY: 0.00000275 AC XY: 1 AN XY: 363416

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000284

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: 0.00000119

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 27

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Familial thoracic aortic aneurysm and aortic dissection Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 10, 2023

The c.7561G>A (p.E2521K) alteration is located in exon 46 (coding exon 45) of the FLNA gene. This alteration results from a G to A substitution at nucleotide position 7561, causing the glutamic acid (E) at amino acid position 2521 to be replaced by a lysine (K). Based on data from gnomAD, the A allele has an overall frequency of 0.001% (1/181458) total alleles studied. The highest observed frequency was 0.004% (1/27366) of Latino alleles. This amino acid position is highly conserved in available vertebrate species. This alteration is predicted to be deleterious by in silico analysis. Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

FLNA-related disorder Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Feb 07, 2023

The FLNA c.7585G>A variant is predicted to result in the amino acid substitution p.Glu2529Lys. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.0037% of alleles in individuals of Latino descent in gnomAD (http://gnomad.broadinstitute.org/variant/X-153577901-C-T). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Melnick-Needles syndrome;C0265293:Frontometaphyseal dysplasia;C1844696:Oto-palato-digital syndrome, type II;C1848213:Heterotopia, periventricular, X-linked dominant Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Dec 04, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.72
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Pathogenic	0.54
Cadd	Uncertain	24
Dann	Pathogenic	1.0
DEOGEN2	Uncertain	0.77	D;.;.;.;.
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.99	D;D;.;D;D
M_CAP	Pathogenic	0.48	D
MetaRNN	Uncertain	0.71	D;D;D;D;D
MetaSVM	Pathogenic	0.81	D
MutationAssessor	Uncertain	2.3	M;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Pathogenic	0.84	D
PROVEAN	Uncertain	-3.3	D;.;D;D;.
REVEL	Pathogenic	0.84
Sift	Uncertain	0.0010	D;.;D;D;.
Sift4G	Uncertain	0.0090	D;D;D;D;D
Polyphen		1.0	D;.;P;P;.
Vest4		0.64
MutPred		0.41		Gain of ubiquitination at E2529 (P = 0.0146);.;.;.;.;
MVP		1.0
MPC		1.3
ClinPred		0.90	D
GERP RS		4.8
Varity_R		0.74
gMVP		0.94

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: rs1557175308; hg19: chrX-153577901;