rs796052790

Positions:

chrX-100408374-T-C

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_001184880.2(PCDH19):c.224A>G(p.Asn75Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000497 in 1,207,697 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 3 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000036 ( 0 hom., 2 hem., cov: 24)

Exomes 𝑓: 0.0000018 ( 0 hom. 1 hem. )

Consequence

PCDH19
NM_001184880.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4B:1

Conservation

PhyloP100: 2.62

Variant links:

Genes affected

PCDH19 (HGNC:14270): (protocadherin 19) The protein encoded by this gene is a member of the delta-2 protocadherin subclass of the cadherin superfamily. The encoded protein is thought to be a calcium-dependent cell-adhesion protein that is primarily expressed in the brain. Mutations in this gene on human chromosome X are associated with sporadic infantile epileptic encephalopathy and to a female-restricted form of epilepsy (EFMR; also known as PCDH19RE). Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2017]

PCDH19 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.21575347).

BS2

High Hemizygotes in GnomAd4 at 2 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PCDH19	NM_001184880.2 linkuse as main transcript	c.224A>G	p.Asn75Ser	missense_variant	1/6	ENST00000373034.8	NP_001171809.1	Q8TAB3-1
PCDH19	NM_001105243.2 linkuse as main transcript	c.224A>G	p.Asn75Ser	missense_variant	1/5		NP_001098713.1	Q8TAB3-2B3KU71
PCDH19	NM_020766.3 linkuse as main transcript	c.224A>G	p.Asn75Ser	missense_variant	1/5		NP_065817.2	Q8TAB3-3B3KU71

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
PCDH19	ENST00000373034.8 linkuse as main transcript	c.224A>G	p.Asn75Ser	missense_variant	1/6	1	NM_001184880.2	ENSP00000362125.4	Q8TAB3-1
PCDH19	ENST00000255531.8 linkuse as main transcript	c.224A>G	p.Asn75Ser	missense_variant	1/5	1		ENSP00000255531.7	Q8TAB3-2
PCDH19	ENST00000420881.6 linkuse as main transcript	c.224A>G	p.Asn75Ser	missense_variant	1/5	1		ENSP00000400327.2	Q8TAB3-3

Frequencies

GnomAD3 genomes

AF:

0.0000360

AC:

AN:

110993

Hom.:

Cov.:

AF XY:

0.0000602

AC XY:

AN XY:

33213

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000757

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000556

AC:

AN:

179728

Hom.:

AF XY:

0.0000151

AC XY:

AN XY:

66020

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:

0.0000526

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000182

AC:

AN:

1096704

Hom.:

Cov.:

AF XY:

0.00000276

AC XY:

AN XY:

362332

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000238

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000360

AC:

AN:

110993

Hom.:

Cov.:

AF XY:

0.0000602

AC XY:

AN XY:

33213

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:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000757

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000227

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Developmental and epileptic encephalopathy, 9

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 31, 2018	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 05, 2023	This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 75 of the PCDH19 protein (p.Asn75Ser). This variant is present in population databases (rs796052790, gnomAD 0.005%). This variant has not been reported in the literature in individuals affected with PCDH19-related conditions. ClinVar contains an entry for this variant (Variation ID: 206292). 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) performed at Invitae indicates that this missense variant is not expected to disrupt PCDH19 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. -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Jan 09, 2020

DNA sequence analysis of the PCDH19 gene demonstrated a sequence change, c.224A>G, in exon 1 that results in an amino acid change, p.Asn75Ser. This sequence change does not appear to have been previously described in patients with PCDH19-related disorders. This particular sequence change has been described in the gnomAD database in two individuals in the hemizygous state which corresponds to a population frequency of 0.00099% (dbSNP rs796052790). The p.Asn75Ser change affects a moderately conserved amino acid residue located in a domain of the PCDH19 protein that is known to be functional. The p.Asn75Ser substitution appears to be benign using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL). Due to these contrasting evidences and the lack of functional studies, the clinical significance of the p.Asn75Ser change remains unknown at this time. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Aug 16, 2019

The majority of missense variants in this gene are considered pathogenic (Stenson et al., 2014); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge -

Neurodevelopmental disorder with epilepsy

Benign:1

Benign, no assertion criteria provided

research

Neurogenetics Research Program, University of Adelaide

Dec 20, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.083

BayesDel_addAF

Benign

-0.45

BayesDel_noAF

Benign

-0.88

CADD

Benign

DANN

Benign

0.96

DEOGEN2

Benign

0.19

.;T;.

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.89

D;D;D

M_CAP

Uncertain

0.093

MetaRNN

Benign

0.22

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.81

L;L;L

PrimateAI

Uncertain

0.62

PROVEAN

Uncertain

-2.7

D;D;D

REVEL

Benign

0.10

Sift

Benign

0.14

T;T;T

Sift4G

Benign

0.28

T;T;T

Polyphen

0.0070

.;B;B

Vest4

0.22

MutPred

0.65

Gain of disorder (P = 0.034);Gain of disorder (P = 0.034);Gain of disorder (P = 0.034);

MVP

0.56

MPC

0.96

ClinPred

0.13

GERP RS

5.7

Varity_R

0.37

gMVP

0.22

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