chrX-154371221-C-A

Position:

chrX-154371221-C-A

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 3P and 11B. PM1PP2BP4_ModerateBP6BS1BS2

The NM_001110556.2(FLNA):c.25G>T(p.Gly9Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00005 in 1,199,415 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 34 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000018 ( 0 hom., 1 hem., cov: 25)

Exomes 𝑓: 0.000053 ( 0 hom. 33 hem. )

Consequence

FLNA
NM_001110556.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:3

Conservation

PhyloP100: 1.26

Variant links:

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]

FLNA links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

PM1

In a region_of_interest Actin-binding (size 272) in uniprot entity FLNA_HUMAN there are 7 pathogenic changes around while only 0 benign (100%) in NM_001110556.2

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), FLNA. . Gene score misZ 3.7802 (greater than the threshold 3.09). GenCC has associacion of gene with X-linked Ehlers-Danlos syndrome, terminal osseous dysplasia-pigmentary defects syndrome, FG syndrome 2, frontometaphyseal dysplasia, heterotopia, periventricular, X-linked dominant, Melnick-Needles syndrome, otopalatodigital syndrome type 2, periventricular nodular heterotopia, otopalatodigital syndrome type 1, intestinal pseudoobstruction, neuronal, chronic idiopathic, X-linked, familial thoracic aortic aneurysm and aortic dissection, congenital short bowel syndrome, frontometaphyseal dysplasia 1, cardiac valvular dysplasia, X-linked.

BP4

Computational evidence support a benign effect (MetaRNN=0.136011).

BP6

Variant X-154371221-C-A is Benign according to our data. Variant chrX-154371221-C-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 435210.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Benign=1, Uncertain_significance=2}.

BS1

Variant frequency is greater than expected in population sas. gnomad4_exome allele frequency = 0.0000534 (58/1086371) while in subpopulation SAS AF= 0.000931 (49/52631). AF 95% confidence interval is 0.000723. There are 0 homozygotes in gnomad4_exome. There are 33 alleles in male gnomad4_exome subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Hemizygotes in GnomAdExome4 at 33 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FLNA	NM_001110556.2 linkuse as main transcript	c.25G>T	p.Gly9Cys	missense_variant	2/48	ENST00000369850.10	NP_001104026.1
FLNA	NM_001456.4 linkuse as main transcript	c.25G>T	p.Gly9Cys	missense_variant	2/47		NP_001447.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FLNA	ENST00000369850.10 linkuse as main transcript	c.25G>T	p.Gly9Cys	missense_variant	2/48	1	NM_001110556.2	ENSP00000358866		P21333-1

Frequencies

GnomAD3 genomes

AF:

0.0000177

AC:

AN:

113044

Hom.:

Cov.:

AF XY:

0.0000284

AC XY:

AN XY:

35192

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000718

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000114

AC:

AN:

149059

Hom.:

AF XY:

0.000203

AC XY:

AN XY:

49177

show subpopulations

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:

0.00102

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000534

AC:

AN:

1086371

Hom.:

Cov.:

AF XY:

0.0000927

AC XY:

AN XY:

355901

show subpopulations

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:

0.000931

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.000132

GnomAD4 genome

AF:

0.0000177

AC:

AN:

113044

Hom.:

Cov.:

AF XY:

0.0000284

AC XY:

AN XY:

35192

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000718

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.000112

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Aug 28, 2024	Variant summary: FLNA c.25G>T (p.Gly9Cys) results in a non-conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 5e-05 in 1199415 control chromosomes, including 34 hemizygotes (gnomAD v4), suggesting the variant may be benign. To our knowledge, no occurrence of c.25G>T in individuals affected with Periventricular Nodular Heterotopia 1 and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 435210). Based on the evidence outlined above, the variant was classified as likely benign. -
Uncertain significance, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Oct 22, 2015	- -

Familial thoracic aortic aneurysm and aortic dissection

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 08, 2019

The p.G9C variant (also known as c.25G>T), located in coding exon 1 of the FLNA gene, results from a G to T substitution at nucleotide position 25. The glycine at codon 9 is replaced by cysteine, an amino acid with highly dissimilar properties. This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

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

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 07, 2022

- -

FLNA-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Feb 07, 2024

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.24

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.29

T;.;.

FATHMM_MKL

Benign

0.70

LIST_S2

Uncertain

0.91

D;.;D

M_CAP

Pathogenic

0.97

MetaRNN

Benign

0.14

T;T;T

MetaSVM

Benign

-0.48

MutationAssessor

Benign

0.55

N;N;N

MutationTaster

Benign

0.99

N;N;N;N

PrimateAI

Pathogenic

0.83

PROVEAN

Benign

-0.89

N;N;N

REVEL

Uncertain

0.31

Sift

Uncertain

0.0030

D;D;D

Sift4G

Benign

0.18

T;T;T

Polyphen

0.45

P;P;P

Vest4

0.20

MutPred

0.32

Gain of helix (P = 0.0117);Gain of helix (P = 0.0117);Gain of helix (P = 0.0117);

MVP

0.87

MPC

1.5

ClinPred

0.084

GERP RS

3.7

Varity_R

0.25

gMVP

0.67

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over