12-6570970-T-C

Position:

• chr12-6570970-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP2 PP3_Moderate

The NM_001273.5(CHD4):​c.5620A>G​(p.Thr1874Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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)
• Consequence: CHD4 NM_001273.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.67

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 Uncertain_significance. Variant got 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), CHD4. . Gene score misZ 6.3412 (greater than the threshold 3.09). Trascript score misZ 8.6114 (greater than threshold 3.09). GenCC has associacion of gene with syndromic intellectual disability, Sifrim-Hitz-Weiss syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.867

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHD4	NM_001273.5	c.5620A>G	p.Thr1874Ala	missense_variant	39/40	ENST00000544040.7
CHD4	NM_001297553.2	c.5599A>G	p.Thr1867Ala	missense_variant	38/39
CHD4	NM_001363606.2	c.5590A>G	p.Thr1864Ala	missense_variant	39/40

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHD4	ENST00000544040.7	c.5620A>G	p.Thr1874Ala	missense_variant	39/40	5	NM_001273.5	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 28, 2024

The c.5620A>G (p.T1874A) alteration is located in exon 39 (coding exon 38) of the CHD4 gene. This alteration results from a A to G substitution at nucleotide position 5620, causing the threonine (T) at amino acid position 1874 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.32
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.15
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.23	.;T;.;D;.;.;.;.;.;.;.
Eigen	Pathogenic	0.77
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.92	D;D;D;D;D;D;D;D;D;D;D
M_CAP	Uncertain	0.16	D
MetaRNN	Pathogenic	0.87	D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	0.84	D
MutationAssessor	Uncertain	2.5	.;.;.;M;.;.;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.78	T
PROVEAN	Uncertain	-2.7	.;D;.;.;.;.;.;.;.;.;.
REVEL	Pathogenic	0.83
Sift	Uncertain	0.013	.;D;.;.;.;.;.;.;.;.;.
Sift4G	Uncertain	0.0080	.;D;.;.;.;.;.;.;.;.;.
Polyphen		0.84, 0.98, 0.99	.;.;P;D;.;.;.;.;D;.;.
Vest4		0.72
MutPred		0.66		.;.;.;Gain of helix (P = 0.0696);.;.;.;.;.;.;.;
MVP		0.87
MPC		2.0
ClinPred		0.96	D
GERP RS		5.7
Varity_R		0.45
gMVP		0.77

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr12-6680136;