chrX-154366336-C-A

Variant names:

• chrX-154366336-C-A
• rs781879374
• NM_001110556.2:c.1200G>T

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP6 BS2

The NM_001110556.2(FLNA):​c.1200G>T​(p.Lys400Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000146 in 1,098,096 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 6 hemizygotes in GnomAD. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: not found (cov: 25)
  • Exomes 𝑓: 0.000015 (0 hom. 6 hem.)
• Consequence: FLNA NM_001110556.2 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1 O:1
• Conservation: PhyloP100: 0.276
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• periventricular nodular heterotopia

  Inheritance: AD, XL Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• frontometaphyseal dysplasia 1

  Inheritance: XL Classification: DEFINITIVE Submitted by: G2P
• genetic developmental and epileptic encephalopathy

  Inheritance: XL Classification: DEFINITIVE Submitted by: G2P
• heterotopia, periventricular, X-linked dominant

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Illumina, Labcorp Genetics (formerly Invitae), G2P
• intestinal pseudoobstruction, neuronal, chronic idiopathic, X-linked

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• Melnick-Needles syndrome

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Orphanet
• otopalatodigital syndrome type 2

  Inheritance: XL Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, G2P
• terminal osseous dysplasia-pigmentary defects syndrome

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae)
• cardiac valvular dysplasia, X-linked

  Inheritance: XL Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• frontometaphyseal dysplasia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• congenital short bowel syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• otopalatodigital syndrome type 1

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
• X-linked Ehlers-Danlos syndrome

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
• familial thoracic aortic aneurysm and aortic dissection

  Inheritance: Unknown Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• BP6: Variant X-154366336-C-A is Benign according to our data. Variant chrX-154366336-C-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 213515.
• BS2: High Hemizygotes in GnomAdExome4 at 6 XL,AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001110556.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FLNA	NM_001110556.2	MANE Select	c.1200G>T	p.Lys400Asn	missense	Exon 8 of 48	NP_001104026.1	P21333-1
	FLNA	NM_001456.4		c.1200G>T	p.Lys400Asn	missense	Exon 8 of 47	NP_001447.2	P21333-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FLNA	ENST00000369850.10	TSL:1 MANE Select	c.1200G>T	p.Lys400Asn	missense	Exon 8 of 48	ENSP00000358866.3	P21333-1
	FLNA	ENST00000360319.9	TSL:1	c.1200G>T	p.Lys400Asn	missense	Exon 7 of 46	ENSP00000353467.4	P21333-2
	FLNA	ENST00000369856.8	TSL:1	c.1119G>T	p.Lys373Asn	missense	Exon 7 of 47	ENSP00000358872.4	Q60FE5

Frequencies

GnomAD3 genomes Cov.: 25

GnomAD2 exomes AF: 0.00000551 AC: 1 AN: 181543 AF XY: 0.00

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000123

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000146 AC: 16 AN: 1098096 Hom.: 0 Cov.: 33 AF XY: 0.0000165 AC XY: 6 AN XY: 363512

African (AFR) AF: 0.00 AC: 0 AN: 26403

American (AMR) AF: 0.00 AC: 0 AN: 35206

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19386

East Asian (EAS) AF: 0.00 AC: 0 AN: 30206

South Asian (SAS) AF: 0.00 AC: 0 AN: 54147

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40393

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4136

European-Non Finnish (NFE) AF: 0.0000190 AC: 16 AN: 842121

Other (OTH) AF: 0.00 AC: 0 AN: 46098

GnomAD4 genome Cov.: 25

ExAC AF: 0.00000826 AC: 1

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	-	1	Connective tissue disorder (1)
-	1	-	Melnick-Needles syndrome;C0265293:Frontometaphyseal dysplasia;C1844696:Oto-palato-digital syndrome, type II;C1848213:Heterotopia, periventricular, X-linked dominant (1)
-	1	-	not provided (1)
-	-	-	FLNA-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Benign	-0.014	T
BayesDel_noAF	Benign	-0.26
CADD	Benign	23
DANN	Benign	0.97
DEOGEN2	Uncertain	0.76	D
FATHMM_MKL	Benign	0.69	D
LIST_S2	Uncertain	0.95	D
M_CAP	Uncertain	0.21	D
MetaRNN	Uncertain	0.66	D
MetaSVM	Uncertain	0.055	D
MutationAssessor	Uncertain	2.3	M
PhyloP100		0.28
PrimateAI	Uncertain	0.74	T
PROVEAN	Uncertain	-3.6	D
REVEL	Uncertain	0.45
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.0040	D
Polyphen		0.095	B
Vest4		0.57
MutPred		0.55		Loss of ubiquitination at K400 (P = 0.0192)
MVP		0.93
MPC		0.90
ClinPred		0.81	D
GERP RS		3.9
PromoterAI		-0.038	Neutral
Varity_R		0.90
gMVP		0.65
Mutation Taster		=77/23	polymorphism

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

Other links and lift over

dbSNP: rs781879374; hg19: chrX-153594704;