12-6573124-G-C

Position:

• chr12-6573124-G-C

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PP2 PP3_Moderate BS2

The NM_001273.5(CHD4):​c.5507C>G​(p.Ser1836Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000411 in 1,459,048 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: CHD4 NM_001273.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 7.47

Genes affected

CHD4 (HGNC:1919): (chromodomain helicase DNA binding protein 4) The product of this gene belongs to the SNF2/RAD54 helicase family. It represents the main component of the nucleosome remodeling and deacetylase complex and plays an important role in epigenetic transcriptional repression. Patients with dermatomyositis develop antibodies against this protein. Somatic mutations in this gene are associated with serous endometrial tumors. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2014]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PP2: Missense variant where missense usually causes diseases, CHD4
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.878
• BS2: High AC in GnomAdExome4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHD4	NM_001273.5	c.5507C>G	p.Ser1836Cys	missense_variant	38/40	ENST00000544040.7
CHD4	NM_001297553.2	c.5486C>G	p.Ser1829Cys	missense_variant	37/39
CHD4	NM_001363606.2	c.5474C>G	p.Ser1825Cys	missense_variant	38/40

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHD4	ENST00000544040.7	c.5507C>G	p.Ser1836Cys	missense_variant	38/40	5	NM_001273.5	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000121 AC: 3 AN: 248484 Hom.: 0 AF XY: 0.00000744 AC XY: 1 AN XY: 134408

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: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000886

Gnomad OTH exome AF: 0.000332

GnomAD4 exome AF: 0.00000411 AC: 6 AN: 1459048 Hom.: 0 Cov.: 30 AF XY: 0.00000413 AC XY: 3 AN XY: 725720

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: 0.0000187

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Sifrim-Hitz-Weiss syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory of Medical Genetics, National & Kapodistrian University of Athens

Oct 06, 2021

PM2, PP2, PP3 -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Sep 28, 2022

ClinVar contains an entry for this variant (Variation ID: 1299613). 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 expected to disrupt CHD4 protein function. This variant has not been reported in the literature in individuals affected with CHD4-related conditions. This variant is present in population databases (rs770801247, gnomAD 0.003%). This sequence change replaces serine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 1836 of the CHD4 protein (p.Ser1836Cys). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.30
CADD	Pathogenic	29
DANN	Uncertain	0.99
Eigen	Pathogenic	0.87
Eigen_PC	Pathogenic	0.85
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Pathogenic	0.99	D;D;D;D;D;D;D;D;D;D;D
M_CAP	Uncertain	0.22	D
MetaRNN	Pathogenic	0.88	D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	0.91	D
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.82	D
REVEL	Pathogenic	0.87
Polyphen		1.0, 1.0	.;.;D;D;.;.;.;.;D;.;.
Vest4		0.74
MutPred		0.65		.;.;.;Gain of methylation at K1837 (P = 0.0151);.;.;.;.;.;.;.;
MVP		0.90
MPC		2.0
ClinPred		0.94	D
GERP RS		5.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.40
gMVP		0.89

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

Other links and lift over

dbSNP: rs770801247; hg19: chr12-6682290;