15-92901249-T-G

Variant summary

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

The NM_001271.4(CHD2):ā€‹c.12T>Gā€‹(p.Asn4Lys) variant causes a missense change. The variant allele was found at a frequency of 0.000000692 in 1,445,290 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (ā˜…).

Frequency

Genomes: not found (cov: 31)
Exomes š‘“: 6.9e-7 ( 0 hom. )

Consequence

CHD2
NM_001271.4 missense

Scores

1
5
13

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.82
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]

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 in the CHD2 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 57 curated pathogenic missense variants (we use a threshold of 10). The gene has 104 curated benign missense variants. Gene score misZ: 5.2052 (above the threshold of 3.09). Trascript score misZ: 6.0204 (above the threshold of 3.09). GenCC associations: The gene is linked to developmental and epileptic encephalopathy 94, complex neurodevelopmental disorder, myoclonic-astatic epilepsy, Lennox-Gastaut syndrome.
BP4
Computational evidence support a benign effect (MetaRNN=0.21290645).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
CHD2NM_001271.4 linkc.12T>G p.Asn4Lys missense_variant Exon 2 of 39 ENST00000394196.9 NP_001262.3 O14647-1
CHD2NM_001042572.3 linkc.12T>G p.Asn4Lys missense_variant Exon 2 of 13 NP_001036037.1 O14647-3

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
CHD2ENST00000394196.9 linkc.12T>G p.Asn4Lys missense_variant Exon 2 of 39 5 NM_001271.4 ENSP00000377747.4 O14647-1

Frequencies

GnomAD3 genomes
Cov.:
31
GnomAD3 exomes
AF:
0.00000806
AC:
2
AN:
248110
Hom.:
0
AF XY:
0.00
AC XY:
0
AN XY:
134164
show subpopulations
Gnomad AFR exome
AF:
0.000125
Gnomad AMR exome
AF:
0.00
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:
6.92e-7
AC:
1
AN:
1445290
Hom.:
0
Cov.:
27
AF XY:
0.00
AC XY:
0
AN XY:
719834
show subpopulations
Gnomad4 AFR exome
AF:
0.0000302
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:
0.00
Gnomad4 OTH exome
AF:
0.00
GnomAD4 genome
Cov.:
31
ExAC
AF:
0.0000165
AC:
2

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

Developmental and epileptic encephalopathy 94 Uncertain:1
Feb 24, 2024
Labcorp Genetics (formerly Invitae), Labcorp
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

This sequence change replaces asparagine, which is neutral and polar, with lysine, which is basic and polar, at codon 4 of the CHD2 protein (p.Asn4Lys). This variant is present in population databases (rs750955957, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with CHD2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1404443). 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 with a negative predictive value of 95%. 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. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.24
BayesDel_addAF
Benign
-0.13
T
BayesDel_noAF
Benign
-0.19
CADD
Uncertain
24
DANN
Uncertain
0.98
DEOGEN2
Benign
0.080
.;.;T;.;.;T;.
Eigen
Benign
0.086
Eigen_PC
Uncertain
0.28
FATHMM_MKL
Uncertain
0.78
D
LIST_S2
Benign
0.84
T;T;T;T;T;T;T
M_CAP
Benign
0.053
D
MetaRNN
Benign
0.21
T;T;T;T;T;T;T
MetaSVM
Uncertain
-0.060
T
MutationAssessor
Benign
1.4
.;L;L;.;.;.;L
PrimateAI
Uncertain
0.77
T
PROVEAN
Benign
-0.73
.;.;N;.;.;.;N
REVEL
Benign
0.29
Sift
Pathogenic
0.0
.;.;D;.;.;.;D
Sift4G
Benign
0.49
T;T;T;.;.;T;T
Polyphen
0.28, 0.18
.;B;B;.;.;.;.
Vest4
0.44, 0.50, 0.40, 0.64, 0.50, 0.40
MutPred
0.26
Gain of methylation at N4 (P = 0.0106);Gain of methylation at N4 (P = 0.0106);Gain of methylation at N4 (P = 0.0106);Gain of methylation at N4 (P = 0.0106);Gain of methylation at N4 (P = 0.0106);Gain of methylation at N4 (P = 0.0106);Gain of methylation at N4 (P = 0.0106);
MVP
0.63
MPC
0.55
ClinPred
0.39
T
GERP RS
6.0
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.7
Varity_R
0.20
gMVP
0.26

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.14
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.

Other links and lift over

dbSNP: rs750955957; hg19: chr15-93444479; API