15-92901248-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2PP2BP4_Moderate

The NM_001271.4(CHD2):c.11A>G(p.Asn4Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000025 in 1,597,062 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N4K) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CHD2
NM_001271.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 4.08

Variant links:

Genes affected

CHD2 (HGNC:1917): (chromodomain helicase DNA binding protein 2) The CHD family of proteins is characterized by the presence of chromo (chromatin organization modifier) domains and SNF2-related helicase/ATPase domains. CHD genes alter gene expression possibly by modification of chromatin structure thus altering access of the transcriptional apparatus to its chromosomal DNA template. Alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

CHD2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant where missense usually causes diseases, CHD2

BP4

Computational evidence support a benign effect (MetaRNN=0.14758107).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHD2	NM_001271.4 linkuse as main transcript	c.11A>G	p.Asn4Ser	missense_variant	2/39	ENST00000394196.9
CHD2	NM_001042572.3 linkuse as main transcript	c.11A>G	p.Asn4Ser	missense_variant	2/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHD2	ENST00000394196.9 linkuse as main transcript	c.11A>G	p.Asn4Ser	missense_variant	2/39	5	NM_001271.4	P1	O14647-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152110

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000138

AC:

AN:

1444952

Hom.:

Cov.:

AF XY:

0.00000278

AC XY:

AN XY:

719726

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

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:

9.11e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152110

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74288

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 15, 2018

The p.N4S variant (also known as c.11A>G), located in coding exon 1 of the CHD2 gene, results from an A to G substitution at nucleotide position 11. The asparagine at codon 4 is replaced by serine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species; however, serine is the reference amino acid in other 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. -

Developmental and epileptic encephalopathy 94

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Nov 15, 2022

This missense change has been observed in individual(s) with clinical features of CHD2-related conditions (Invitae). 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. 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 CHD2 protein function. ClinVar contains an entry for this variant (Variation ID: 1045197). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 4 of the CHD2 protein (p.Asn4Ser). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.079

BayesDel_addAF

Benign

-0.046

BayesDel_noAF

Benign

-0.30

Cadd

Benign

Dann

Benign

0.95

Eigen

Benign

-0.24

Eigen_PC

Benign

-0.049

FATHMM_MKL

Benign

0.65

LIST_S2

Uncertain

0.87

D;D;D;T;T;D;D

M_CAP

Benign

0.039

MetaRNN

Benign

0.15

T;T;T;T;T;T;T

MetaSVM

Benign

-0.44

MutationTaster

Benign

0.95

D;D;D

PrimateAI

Uncertain

0.66

Sift4G

Benign

1.0

T;T;T;.;.;T;T

Polyphen

0.0050, 0.0030

.;B;B;.;.;.;.

Vest4

0.20, 0.22, 0.098, 0.37, 0.33, 0.13

MutPred

0.24

Gain of phosphorylation at N4 (P = 0.0017);Gain of phosphorylation at N4 (P = 0.0017);Gain of phosphorylation at N4 (P = 0.0017);Gain of phosphorylation at N4 (P = 0.0017);Gain of phosphorylation at N4 (P = 0.0017);Gain of phosphorylation at N4 (P = 0.0017);Gain of phosphorylation at N4 (P = 0.0017);

MVP

0.51

MPC

0.38

ClinPred

0.25

GERP RS

3.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.13

gMVP

0.15

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.060

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